ID |
Date |
Author |
Category |
Subject |
Year |
|
296
|
Fri Apr 30 09:57:57 2021 |
Jan Glorius | Calibration | run0005 - Xray90 calib Pb210 d=167.5mm | 2021 | Efficiency calibration in the lab
Detector: GEM1800 - 90 deg
Source: 210Pb
Distance: 167.5mm
Start time: 9:58:00 - 30.04.2021
Stop time: 10:01:09 - 30.04.2021
file name: e127b_run0005.lmd
avrg. rate: 50Hz
dead-time: 1%
Still rate peaks, probably the ESR kicker or some other external influence.
So we have double triggers occasionally. This might slightly affect deadtime determination. |
|
295
|
Fri Apr 30 09:27:27 2021 |
Jan Glorius | Calibration | run0004 - Xray90 calib Pb210 d=167.5mm | 2021 | Efficiency calibration in the lab
Detector: GEM1800 - 90 deg
Source: 210Pb
Distance: 167.5mm
Start time: 9:26:58 - 30.04.2021
Stop time: 9:33:22 - 30.04.2021
file name: e127b_run0004.lmd
avrg. rate: 50Hz
dead-time: 1%
Still rate peaks, further investigations. |
|
294
|
Thu Apr 29 20:34:09 2021 |
Jan Glorius | Calibration | run0003 - Xray90 calib Pb210 d=167.5mm | 2021 | Efficiency calibration in the lab
Detector: GEM1800 - 90 deg
Source: 210Pb
Distance: 167.5mm
Start time: 20:39:54 - 29.04.2021
Stop time: 08:43:58 - 30.04.2021
file name: e127b_run0003.lmd
avrg. rate: 70Hz
dead-time: 1%
Rate spikes every ~2-3 sec. Need to be checked! |
|
293
|
Thu Apr 29 20:32:52 2021 |
Jan Glorius | Calibration | calibration sources | 2021 | We use the following list of sources for calibration of the Xray detectors:
- 210Pb [40.1 kBq (4%), 01.10.2020 12:00 UTC] SpecSheet
- 241Am_low [40.5 kBq (3%), 01.10.2020 12:00 UTC] SpecSheet
- 241Am_high [389 kBq (3%), 01.10.2020 12:00 UTC] SpecSheet
- 133Ba_low [40.8 kBq (3%), 01.10.2020 12:00 UTC] SpecSheet
- 133Ba_high [404 kBq (3%), 01.10.2020 12:00 UTC] SpecSheet |
|
292
|
Wed Apr 28 09:12:47 2021 |
Jan, Yuri | Detectors | UI-diagram | 2021 | The UI-curve of the detector
U I
10 0.11
20 0.13
30 0.15
40 0.17
50 0.19
60 0.21
70 0.22
80 0.23
90 0.25
100 0.27
110 0.29
120 0.31
130 0.33
140 0.35
150 0.37 |
| Attachment 1: UI_meas_curve.pdf
|
|
|
291
|
Thu Apr 22 10:56:20 2021 |
Jan | Detectors | target-chamber det. distances | 2021 | This is the lookup table for the distance of each x-ray detector to the target.
See attached foto for explanation.
It is the same values as in 2020: https://elog.gsi.de/esr/E127/36
|
Detector | A (dA) [mm] | B (dB) [mm] | C (dC) [mm] | calculate | result [mm]
| |
35° | 136.0 (1.0) | 20.0 (0.2) | 450.0 (0.5) | C + B - A | 334.0 (?)
| |
90° | 76.0 (0.5) | 20.0 (0.2) | 447.0/2 = 223.5 (1.0) | C + B - A | 167.5 (?)
| |
145° | 165.0 (1.0) | 20.0 (0.2) | 450.0 (0.5) | C + B - A | 305.0 (?)
|
Errors are estimated after measurement, final errorbars have to be double checked! |
| Attachment 1: E127_xray_distances.jpg
|
|
|
290
|
Wed Apr 14 09:42:50 2021 |
Jan | Detectors | BaF HV gain matching | 2021 | The preliminary gain matching settings for a full ADC range of ~12MeV:
|
Det.Nr. | ADC/TDC ch | HV | I | comment
| |
1 | 20 | 2400V | 390uA | CAEN HV ch0
| |
2 | 21 | 1763V | 287uA | CAEN HV ch1
| |
3 | 22 | 2340V | 380uA | CAEN HV ch2
| |
4 | 23 | 2175V | 354uA | CAEN HV ch3
| |
5 | 24 | 2017.5V | ? | emetron HV
| |
6 | 25 | 1780V | ? | not yet biased
|
Attached is a 22Na-spectrum taken with detectors 1 - 5.
The used MSCF settings are also attached.
Detector 6 does not yet have a HV channel available. |
| Attachment 1: BaF_Na22_gain_match_v1.png
|
|
| Attachment 2: baf_gain_match_v1.dat
|
atpnuc006:mrcc:mscf1:getGainCommon 15
atpnuc006:mrcc:mscf1:getShapingTimeCommon 3
atpnuc006:mrcc:mscf1:getThresholdCommon 6
atpnuc006:mrcc:mscf1:getPzCommon 6
atpnuc006:mrcc:mscf1:getGain1 6
atpnuc006:mrcc:mscf1:getGain2 6
atpnuc006:mrcc:mscf1:getGain3 6
atpnuc006:mrcc:mscf1:getGain4 6
atpnuc006:mrcc:mscf1:getShapingTime1 3
atpnuc006:mrcc:mscf1:getShapingTime2 3
atpnuc006:mrcc:mscf1:getShapingTime3 3
atpnuc006:mrcc:mscf1:getShapingTime4 3
atpnuc006:mrcc:mscf1:getThreshold1 6
atpnuc006:mrcc:mscf1:getThreshold2 6
atpnuc006:mrcc:mscf1:getThreshold3 6
atpnuc006:mrcc:mscf1:getThreshold4 6
atpnuc006:mrcc:mscf1:getThreshold5 6
atpnuc006:mrcc:mscf1:getThreshold6 6
atpnuc006:mrcc:mscf1:getThreshold7 6
atpnuc006:mrcc:mscf1:getThreshold8 6
atpnuc006:mrcc:mscf1:getThreshold9 6
atpnuc006:mrcc:mscf1:getThreshold10 6
atpnuc006:mrcc:mscf1:getThreshold11 6
atpnuc006:mrcc:mscf1:getThreshold12 6
atpnuc006:mrcc:mscf1:getThreshold13 6
atpnuc006:mrcc:mscf1:getThreshold14 6
atpnuc006:mrcc:mscf1:getThreshold15 6
atpnuc006:mrcc:mscf1:getThreshold16 6
atpnuc006:mrcc:mscf1:getPz1 6
atpnuc006:mrcc:mscf1:getPz2 3
atpnuc006:mrcc:mscf1:getPz3 3
atpnuc006:mrcc:mscf1:getPz4 1
atpnuc006:mrcc:mscf1:getPz5 5
atpnuc006:mrcc:mscf1:getPz6 5
atpnuc006:mrcc:mscf1:getPz7 6
atpnuc006:mrcc:mscf1:getPz8 6
atpnuc006:mrcc:mscf1:getPz9 6
atpnuc006:mrcc:mscf1:getPz10 6
atpnuc006:mrcc:mscf1:getPz11 6
atpnuc006:mrcc:mscf1:getPz12 6
atpnuc006:mrcc:mscf1:getPz13 6
atpnuc006:mrcc:mscf1:getPz14 6
atpnuc006:mrcc:mscf1:getPz15 6
atpnuc006:mrcc:mscf1:getPz16 6
atpnuc006:mrcc:mscf1:getSingleChMode 1
atpnuc006:mrcc:mscf1:getRcMode 1
atpnuc006:mrcc:mscf1:getAutoPZ 0
atpnuc006:mrcc:mscf1:getMultiplicityHi 8
atpnuc006:mrcc:mscf1:getMultiplicityLo 1
atpnuc006:mrcc:mscf1:getSumTrgThresh 100
atpnuc006:mrcc:mscf1:getBlrOn 0
atpnuc006:mrcc:mscf1:getCoincTime 100
atpnuc006:mrcc:mscf1:getThreshOffset 1
atpnuc006:mrcc:mscf1:getShaperOffset 100
atpnuc006:mrcc:mscf1:getBlrThresh 10
atpnuc006:mrcc:mscf1:getECLDelay 0
|
|
289
|
Wed Mar 31 13:57:27 2021 |
Jan | Detectors | BaF HV settings | 2021 | The setting below is a start value for final gain matching with a full ADC range of 12MeV:
|
Det.Nr. | ADC/TDC ch | HV | MSCF Gain
| |
1 | 20 | 2400V | 6
| |
2 | 21 | 1780V | 6
| |
3 | 22 | 2350V | 6
| |
4 | 23 | 2130V | 6
| |
5 | 24 | 2050V | 6
| |
6 | 25 | 1780V | 6
|
|
|
288
|
Wed Mar 31 13:52:04 2021 |
Jan | Detectors | BaF Na22 Testing | 2021 | On 30. and 31.03.2021 we did some testing with the 6 BaF detectors.
Trigger & threshold:
With a threshold at ~250 keV, each detector has an trigger rate of about 0.5kHz due to internal activity.
Energy spectra
All detectors showed the Na22 lines (511 + 1275 keV) and also the lines from internal activity.
The energy resolution was on the order of 8.5 - 11 keV, depending on the detector.
Time spectra
Raw TDC spectra showed self-stop peak.
TDC diff spectra (between detectors) show one main (sharp) correlation peak about 8ns = 30ch*0.293ns/ch off the zero.
At very low intensity a time structure around this peak is visible in a region of 120ns around the main peak. This is not understood, the energy spectra look similar for all these time regions (above/on/below the main peak).
Additionally, the coincidence E-specta between detector 1 and 2 (gating on the main time peak), nicely showed only the 511 keV line from Na22 and some gras.
Overnight test run:
Det. 1, 2, 3, 4 with the Na22 source
lxg1275:/data.local3/e127/lmd_2021/test/
e127b_run0021.lmd
e127b_run0022.lmd
e127b_run0023.lmd
e127b_run0024.lmd
e127b_run0025.lmd
e127b_run0026.lmd
e127b_run0027.lmd
e127b_run0028.lmd
e127b_run0029.lmd
e127b_run0030.lmd
e127b_run0031.lmd
e127b_run0032.lmd
e127b_run0033.lmd
e127b_run0034.lmd
Gain matched HV settings: https://elog.gsi.de/esr/E127/289
Issues to solve:
- 2 missing HV channels
- Go4 Analysis not stable
- trigger not on Baf but on Si |
|
287
|
Tue Feb 2 13:59:00 2021 |
Jan | Detectors | DSSD installation and alignment | 2021 | The DSSD has been exchanged and aligned in
November 2020. After bakeout at 140°C
(externally, 120°C at internal temp. Sensor)
for more than a week, the vacuum in the setup
is roughly 4.5e-10 mbar.
After the bakeout the detector had to be
realigned, it was lower by 1-2 mm. Using the
line laser the realignment was done by
touching only the screws on the far part of
the base of the flange. These screws have been
thightend by about a 1/4 turn after releasing
the headless positioning screw accordingly. |
|
286
|
Tue Nov 24 15:35:49 2020 |
Jan | Calibration | DSSD X/Y channel mapping | 2021 | During the detector test test measurements with alpha source the allocation of the 16 X- and 16 Y-channels has been checked.
For the following final allocation, it is always assumed that the (horizontal) y-strips are placed to face the beam directly, while the (vertical) x-strips are on the backside.
Now, all cables from the preamp to the ADC/TDCs are either labeled BLACK (= X-strips, pos. signals) or labeled RED (= Y-strips, neg. signals). These red or black connections should be kept consistently in order to ensure a well known orientation of the DSSD during the experiment. The test run Si2_run006.lmd was taken with this final assignment and serves as reference.
BLACK LABEL > X1 to X16 > pos. MSCF > ADC/TDC ch 0-15 > 50 Ohm resistor at preamps HV-input
RED LABEL > Y1 to Y16 > neg. MSCF > ADC/TDC ch 16-31 > neg. bias voltage at preamps HV-input
Additionally, the RED label indicates the section on the preamp to which negative bias voltage should be applied. |
|
285
|
Fri Nov 20 15:53:37 2020 |
Jan | Analysis | Test of 2nd DSSSD (gen2) | 2021 | Here is the analysis of the test runs with the 2nd DSSD (gen2) using the quick_si_plots.c script attached.
All 32 Si channels are working with acceptable performance.
In run001, there are some additional low energy peaks in nearly all x-strips, which I do not understand yet. They are around 3 MeV and are not visible in the y-strips. It doesn't look like an electronic problem, because there are at least 4
peaks, so not a low amplitude copy of the 3 major alpha peaks between 5 - 5.8 MeV.
However, in run002, the peaks have mostly disappeared, only in x6,x7,x8,x9 is a broad structure at somewhat similar energy... maybe this has to do with the small incident angle of the alphas?
Another run to confirm and double check this would be nice. |
| Attachment 1: quick_si_plots.c
|
//Created by Laszo Varga & Jan Glorius
//last update: 20.11.2020
//run in root:
//root -l
//.L script.c+
//run()
////////////////////////
// INPUT FILES
#define INPUT1 "/data.local3/test_data_2020/Si2_run002.lmd.root"
//OUTPUT FILE
#define OUTPUT "Si2_run002.ana.root"
//Energy thresholds for the silicon:
#define Si_Thrs_LOW 100
#define Si_Thrs_HIGH 8000
////////////////////////
#include <cmath>
#include <string>
#include <cstdlib>
#include <cstdio>
#include <ctime>
#include <fstream>
#include <iostream>
#include <stdint.h>
#include "TROOT.h"
#include "TAttText.h"
#include "TAxis.h"
#include "TCanvas.h"
#include "TChain.h"
#include "TCut.h"
#include "TF1.h"
#include "TFile.h"
#include "TGraph.h"
#include "TGraphAsymmErrors.h"
#include "TGraphErrors.h"
#include "TH1.h"
#include "TH2.h"
#include "THistPainter.h"
#include "TKey.h"
#include "TLatex.h"
#include "TLegend.h"
#include "TMath.h"
#include "TMatrixD.h"
#include "TMinuit.h"
#include "TMultiGraph.h"
#include "TNtuple.h"
#include "TPave.h"
#include "TPaveText.h"
#include "TPoint.h"
#include "TRandom.h"
#include "TRint.h"
#include "TStyle.h"
#include "TString.h"
#include "TTree.h"
#include "TH1F.h"
#include "TH2F.h"
#include "TSystem.h"
#include "TProfile.h"
#include "TVirtualFitter.h"
#include "TCanvas.h"
#include "TLegend.h"
#include "TColor.h"
using namespace std;
void loop(TChain *fChain){
#include "/data.local3/test_data_2020/e127.h"
//creating histos
//counting of variables starts from 0 --> eg.: first Si strip is 0.
TH2D *h_pos_Si_xy_raw=new TH2D("h_pos_si_xy_raw", "h_pos_si_xy_raw",16,-0.5,15.5,16,-0.5,15.5);
TH2D *h_pos_Si_xy_noDC=new TH2D("h_pos_si_xy_noDC", "h_pos_si_xy_noDC",16,-0.5,15.5,16,-0.5,15.5);
TH2D *h_E_Si_all=new TH2D("h_E_Si_all", "E vs. strip Nr.; strip nr.; energy ",32,-0.5,31.5,8192,0.5,8191.5);
TH1D *h_E_Si_x[16];
TH1D *h_E_Si_y[16];
TH2D *h_E_ev_x[16];
TH2D *h_E_ev_y[16];
for(int a=0;a<16;a++){
h_E_Si_x[a]=new TH1D(Form("h_E_Si_x%d",a),Form("h_E_Si_x%d",a),8192,0.5,8191.5);
h_E_Si_y[a]=new TH1D(Form("h_E_Si_y%d",a),Form("h_E_Si_y%d",a),8192,0.5,8191.5);
h_E_ev_x[a]=new TH2D(Form("h_E_ev_x%d",a),Form("h_E_ev_x%d;ev;E",a),1024,0,55e6,4096,0.5,8191.5);
h_E_ev_y[a]=new TH2D(Form("h_E_ev_y%d",a),Form("h_E_ev_y%d;ev;E",a),1024,0,55e6,4096,0.5,8191.5);
}
////////////////////////////////////////////////////////////////////////
Long64_t nentries = fChain->GetEntries();
Long64_t nbytes = 0;
int dc_y_max=-999;
int dc_x_max=-999;
int dc_Ey_max=0;
int dc_Ex_max=0;
int dc_ty_max=0;
int dc_tx_max=0;
for (Long64_t i=0; i<nentries;i++){
//for (Long64_t i=0; i<100000;i++){
nbytes += fChain->GetEntry(i);
// event countdown
if ((float(i)/100000.)==int(i/100000)){cout << "event: " << i << " \tof " << nentries << endl;}
if(trigger==1){
for (int i_x=0;i_x<16;i_x++){
for (int i_y=0;i_y<16;i_y++){
if(int(E_Si_x[i_x])> 2000 && int(E_Si_y[i_y])> 2000)
{
h_pos_Si_xy_raw->Fill(i_x,i_y);
}
if(int(E_Si_x[i_x])>dc_Ex_max && int(E_Si_y[i_y])>dc_Ey_max){
dc_y_max = i_y;
dc_x_max = i_x;
dc_Ey_max = E_Si_y[i_y];
dc_Ex_max = E_Si_x[i_x];
dc_ty_max = t_Si_y[i_y];
dc_tx_max = t_Si_x[i_x];
}
}
//x-loop is missused for y also
if(t_Si_x[i_x] > 0){
h_E_Si_all->Fill(i_x,E_Si_x[i_x]);
h_E_Si_x[i_x]->Fill(E_Si_x[i_x]);
}
if(t_Si_y[i_x] > 0){
h_E_Si_all->Fill(i_x + 16,E_Si_y[i_x]);
h_E_Si_y[i_x]->Fill(E_Si_y[i_x]);
}
}
if(dc_x_max!=-999 && dc_y_max!=-999){
h_pos_Si_xy_noDC->Fill(dc_x_max,dc_y_max);
h_E_ev_x[dc_x_max]->Fill(i,dc_Ex_max);
h_E_ev_y[dc_y_max]->Fill(i,dc_Ey_max);
}
dc_y_max=-999;
dc_x_max=-999;
dc_Ex_max=0;
dc_Ey_max=0;
dc_tx_max=0;
dc_ty_max=0;
}
}//event loop
TFile *graphfile = TFile::Open(OUTPUT, "RECREATE");
//graphfile->mkdir("Si_map");
//graphfile->cd("Si_map");
h_pos_Si_xy_raw->Write();
h_pos_Si_xy_noDC->Write();
h_E_Si_all->Write();
//graphfile->mkdir("Si_E_histos");
//graphfile->cd("Si_E_histos");
for(int a=0;a<16;a++){
h_E_Si_x[a]->Write();
h_E_Si_y[a]->Write();
h_E_ev_x[a]->Write();
h_E_ev_y[a]->Write();
}
graphfile->Close();
cout << "\033[0;32m" << OUTPUT << " is created!\033[0m" << endl;
} // loop
void run(){
const char *command = new char[1000];
char filename[100];
TChain *fChain = new TChain("h101");
sprintf(filename,INPUT1);
cout<<"\033[0;37m//loading run: "<<filename << "\033[0m" <<endl;
fChain->Add(filename);
#ifdef INPUT2 // optional second input file
sprintf(filename,INPUT2);
cout<<"\033[0;37m//loading run: "<<filename << "\033[0m" <<endl;
fChain->Add(filename);
#endif
//sprintf(filename,OUTPUT);
// TFile *outfile = new TFile(filename,"RECREATE");
loop(fChain);
// outfile->Write();
command = "rm *.so";
gSystem->Exec(command);
command = "rm *.d";
gSystem->Exec(command);
command = "rm *.pcm";
gSystem->Exec(command);
return;
}
int main(){
run();
return(0);
}
|
| Attachment 2: e127.h
|
//Declaration of leaves types
UInt_t tpat;
UInt_t trigger;
UInt_t Si_voltage;
UInt_t Si_current;
UInt_t E_Si_y[16];
UInt_t E_Si_x[16];
UInt_t E_Xray[3];
UInt_t E_BaF[6];
UInt_t t_Si_y[16];
UInt_t t_Si_x[16];
UInt_t t_Xray[3];
UInt_t t_BaF[6];
UInt_t v_mega_clock;
UInt_t v_Si_X;
UInt_t v_Si_Y;
UInt_t v_Xray[3];
UInt_t v_BaF[6];
UInt_t v_TRAFO;
UInt_t v_I_cool;
UInt_t v_U_cool;
UInt_t v_jet_S[1];
UInt_t bdt_si_ON;
UInt_t bdt_si_OFF;
UInt_t bdt_xray_ON;
UInt_t bdt_xray_OFF;
UInt_t bdt_baf_ON;
UInt_t bdt_baf_OFF;
UInt_t adt_si_ON;
UInt_t adt_si_OFF;
UInt_t adt_xray_ON;
UInt_t adt_xray_OFF;
UInt_t adt_baf_ON;
UInt_t adt_baf_OFF;
UInt_t red_si_ON;
UInt_t red_si_OFF;
UInt_t red_xray_ON;
UInt_t red_xray_OFF;
UInt_t red_baf_ON;
UInt_t red_baf_OFF;
// Set branch addresses.
fChain->SetBranchAddress("tpat",&tpat);
fChain->SetBranchAddress("TRIGGER",&trigger);
fChain->SetBranchAddress("Si_voltage",&Si_voltage);
fChain->SetBranchAddress("Si_current",&Si_current);
fChain->SetBranchAddress("E_Si_y1",&E_Si_y[0]);
fChain->SetBranchAddress("E_Si_y2",&E_Si_y[1]);
fChain->SetBranchAddress("E_Si_y3",&E_Si_y[2]);
fChain->SetBranchAddress("E_Si_y4",&E_Si_y[3]);
fChain->SetBranchAddress("E_Si_y5",&E_Si_y[4]);
fChain->SetBranchAddress("E_Si_y6",&E_Si_y[5]);
fChain->SetBranchAddress("E_Si_y7",&E_Si_y[6]);
fChain->SetBranchAddress("E_Si_y8",&E_Si_y[7]);
fChain->SetBranchAddress("E_Si_y9",&E_Si_y[8]);
fChain->SetBranchAddress("E_Si_y10",&E_Si_y[9]);
fChain->SetBranchAddress("E_Si_y11",&E_Si_y[10]);
fChain->SetBranchAddress("E_Si_y12",&E_Si_y[11]);
fChain->SetBranchAddress("E_Si_y13",&E_Si_y[12]);
fChain->SetBranchAddress("E_Si_y14",&E_Si_y[13]);
fChain->SetBranchAddress("E_Si_y15",&E_Si_y[14]);
fChain->SetBranchAddress("E_Si_y16",&E_Si_y[15]);
fChain->SetBranchAddress("E_Si_x1",&E_Si_x[0]);
fChain->SetBranchAddress("E_Si_x2",&E_Si_x[1]);
fChain->SetBranchAddress("E_Si_x3",&E_Si_x[2]);
fChain->SetBranchAddress("E_Si_x4",&E_Si_x[3]);
fChain->SetBranchAddress("E_Si_x5",&E_Si_x[4]);
fChain->SetBranchAddress("E_Si_x6",&E_Si_x[5]);
fChain->SetBranchAddress("E_Si_x7",&E_Si_x[6]);
fChain->SetBranchAddress("E_Si_x8",&E_Si_x[7]);
fChain->SetBranchAddress("E_Si_x9",&E_Si_x[8]);
fChain->SetBranchAddress("E_Si_x10",&E_Si_x[9]);
fChain->SetBranchAddress("E_Si_x11",&E_Si_x[10]);
fChain->SetBranchAddress("E_Si_x12",&E_Si_x[11]);
fChain->SetBranchAddress("E_Si_x13",&E_Si_x[12]);
fChain->SetBranchAddress("E_Si_x14",&E_Si_x[13]);
fChain->SetBranchAddress("E_Si_x15",&E_Si_x[14]);
fChain->SetBranchAddress("E_Si_x16",&E_Si_x[15]);
fChain->SetBranchAddress("E_Xray1",&E_Xray[0]);
fChain->SetBranchAddress("E_Xray2",&E_Xray[1]);
fChain->SetBranchAddress("E_Xray3",&E_Xray[2]);
fChain->SetBranchAddress("E_BaF1",&E_BaF[0]);
fChain->SetBranchAddress("E_BaF2",&E_BaF[1]);
fChain->SetBranchAddress("E_BaF3",&E_BaF[2]);
fChain->SetBranchAddress("E_BaF4",&E_BaF[3]);
fChain->SetBranchAddress("E_BaF5",&E_BaF[4]);
fChain->SetBranchAddress("E_BaF6",&E_BaF[5]);
fChain->SetBranchAddress("t_Si_y1",&t_Si_y[0]);
fChain->SetBranchAddress("t_Si_y2",&t_Si_y[1]);
fChain->SetBranchAddress("t_Si_y3",&t_Si_y[2]);
fChain->SetBranchAddress("t_Si_y4",&t_Si_y[3]);
fChain->SetBranchAddress("t_Si_y5",&t_Si_y[4]);
fChain->SetBranchAddress("t_Si_y6",&t_Si_y[5]);
fChain->SetBranchAddress("t_Si_y7",&t_Si_y[6]);
fChain->SetBranchAddress("t_Si_y8",&t_Si_y[7]);
fChain->SetBranchAddress("t_Si_y9",&t_Si_y[8]);
fChain->SetBranchAddress("t_Si_y10",&t_Si_y[9]);
fChain->SetBranchAddress("t_Si_y11",&t_Si_y[10]);
fChain->SetBranchAddress("t_Si_y12",&t_Si_y[11]);
fChain->SetBranchAddress("t_Si_y13",&t_Si_y[12]);
fChain->SetBranchAddress("t_Si_y14",&t_Si_y[13]);
fChain->SetBranchAddress("t_Si_y15",&t_Si_y[14]);
fChain->SetBranchAddress("t_Si_y16",&t_Si_y[15]);
fChain->SetBranchAddress("t_Si_x1",&t_Si_x[0]);
fChain->SetBranchAddress("t_Si_x2",&t_Si_x[1]);
fChain->SetBranchAddress("t_Si_x3",&t_Si_x[2]);
fChain->SetBranchAddress("t_Si_x4",&t_Si_x[3]);
fChain->SetBranchAddress("t_Si_x5",&t_Si_x[4]);
fChain->SetBranchAddress("t_Si_x6",&t_Si_x[5]);
fChain->SetBranchAddress("t_Si_x7",&t_Si_x[6]);
fChain->SetBranchAddress("t_Si_x8",&t_Si_x[7]);
fChain->SetBranchAddress("t_Si_x9",&t_Si_x[8]);
fChain->SetBranchAddress("t_Si_x10",&t_Si_x[9]);
fChain->SetBranchAddress("t_Si_x11",&t_Si_x[10]);
fChain->SetBranchAddress("t_Si_x12",&t_Si_x[11]);
fChain->SetBranchAddress("t_Si_x13",&t_Si_x[12]);
fChain->SetBranchAddress("t_Si_x14",&t_Si_x[13]);
fChain->SetBranchAddress("t_Si_x15",&t_Si_x[14]);
fChain->SetBranchAddress("t_Si_x16",&t_Si_x[15]);
fChain->SetBranchAddress("t_Xray1",&t_Xray[0]);
fChain->SetBranchAddress("t_Xray2",&t_Xray[1]);
fChain->SetBranchAddress("t_Xray3",&t_Xray[2]);
fChain->SetBranchAddress("t_BaF1",&t_BaF[0]);
fChain->SetBranchAddress("t_BaF2",&t_BaF[1]);
fChain->SetBranchAddress("t_BaF3",&t_BaF[2]);
fChain->SetBranchAddress("t_BaF4",&t_BaF[3]);
fChain->SetBranchAddress("t_BaF5",&t_BaF[4]);
fChain->SetBranchAddress("t_BaF6",&t_BaF[5]);
fChain->SetBranchAddress("v_mega_clock",&v_mega_clock);
fChain->SetBranchAddress("v_Si_X",&v_Si_X);
fChain->SetBranchAddress("v_Si_Y",&v_Si_Y);
fChain->SetBranchAddress("v_Xray1",&v_Xray[0]);
fChain->SetBranchAddress("v_Xray2",&v_Xray[1]);
fChain->SetBranchAddress("v_Xray3",&v_Xray[2]);
fChain->SetBranchAddress("v_BaF1",&v_BaF[0]);
fChain->SetBranchAddress("v_BaF2",&v_BaF[1]);
fChain->SetBranchAddress("v_BaF3",&v_BaF[2]);
fChain->SetBranchAddress("v_BaF4",&v_BaF[3]);
fChain->SetBranchAddress("v_BaF5",&v_BaF[4]);
fChain->SetBranchAddress("v_BaF6",&v_BaF[5]);
fChain->SetBranchAddress("v_TRAFO",&v_TRAFO);
fChain->SetBranchAddress("v_I_cool",&v_I_cool);
fChain->SetBranchAddress("v_U_cool",&v_U_cool);
fChain->SetBranchAddress("v_jet_S1",&v_jet_S[0]);
fChain->SetBranchAddress("bdt_si_ON",&bdt_si_ON);
fChain->SetBranchAddress("bdt_si_OFF",&bdt_si_OFF);
fChain->SetBranchAddress("bdt_xray_ON",&bdt_xray_ON);
fChain->SetBranchAddress("bdt_xray_OFF",&bdt_xray_OFF);
fChain->SetBranchAddress("bdt_baf_ON",&bdt_baf_ON);
fChain->SetBranchAddress("bdt_baf_OFF",&bdt_baf_OFF);
fChain->SetBranchAddress("adt_si_ON",&adt_si_ON);
fChain->SetBranchAddress("adt_si_OFF",&adt_si_OFF);
fChain->SetBranchAddress("adt_xray_ON",&adt_xray_ON);
fChain->SetBranchAddress("adt_xray_OFF",&adt_xray_OFF);
fChain->SetBranchAddress("adt_baf_ON",&adt_baf_ON);
fChain->SetBranchAddress("adt_baf_OFF",&adt_baf_OFF);
fChain->SetBranchAddress("red_si_ON",&red_si_ON);
fChain->SetBranchAddress("red_si_OFF",&red_si_OFF);
fChain->SetBranchAddress("red_xray_ON",&red_xray_ON);
fChain->SetBranchAddress("red_xray_OFF",&red_xray_OFF);
fChain->SetBranchAddress("red_baf_ON",&red_baf_ON);
fChain->SetBranchAddress("red_baf_OFF",&red_baf_OFF);
/*
fChain->SetBranchAddress("tpat",&tpat);
fChain->SetBranchAddress("trigger",&trigger);
fChain->SetBranchAddress("timestamp_lsb",×tamp_lsb);
fChain->SetBranchAddress("timestamp_msb",×tamp_msb);
fChain->SetBranchAddress("Tsc_before_lmu1",&Tsc_before_lmu[1]);
fChain->SetBranchAddress("Tsc_before_lmu1",&Tsc_before_lmu1);
fChain->SetBranchAddress("Tsc_before_lmu2",&Tsc_before_lmu2);
fChain->SetBranchAddress("Tsc_before_lmu3",&Tsc_before_lmu3);
fChain->SetBranchAddress("Tsc_before_lmu4",&Tsc_before_lmu4);
fChain->SetBranchAddress("Tsc_before_lmu5",&Tsc_before_lmu5);
fChain->SetBranchAddress("Tsc_before_lmu6",&Tsc_before_lmu6);
fChain->SetBranchAddress("Tsc_before_lmu7",&Tsc_before_lmu7);
fChain->SetBranchAddress("Tsc_before_lmu8",&Tsc_before_lmu8);
fChain->SetBranchAddress("Tsc_before_lmu9",&Tsc_before_lmu9);
fChain->SetBranchAddress("Tsc_before_lmu10",&Tsc_before_lmu10);
fChain->SetBranchAddress("Tsc_before_lmu11",&Tsc_before_lmu11);
fChain->SetBranchAddress("Tsc_before_lmu12",&Tsc_before_lmu12);
fChain->SetBranchAddress("Tsc_before_lmu13",&Tsc_before_lmu13);
fChain->SetBranchAddress("Tsc_before_lmu14",&Tsc_before_lmu14);
fChain->SetBranchAddress("Tsc_before_lmu15",&Tsc_before_lmu15);
fChain->SetBranchAddress("Tsc_before_lmu16",&Tsc_before_lmu16);
fChain->SetBranchAddress("Tsc_before_dt1",&Tsc_before_dt1);
fChain->SetBranchAddress("Tsc_before_dt2",&Tsc_before_dt2);
fChain->SetBranchAddress("Tsc_before_dt3",&Tsc_before_dt3);
fChain->SetBranchAddress("Tsc_before_dt4",&Tsc_before_dt4);
fChain->SetBranchAddress("Tsc_before_dt5",&Tsc_before_dt5);
fChain->SetBranchAddress("Tsc_before_dt6",&Tsc_before_dt6);
fChain->SetBranchAddress("Tsc_before_dt7",&Tsc_before_dt7);
fChain->SetBranchAddress("Tsc_before_dt8",&Tsc_before_dt8);
fChain->SetBranchAddress("Tsc_before_dt9",&Tsc_before_dt9);
fChain->SetBranchAddress("Tsc_before_dt10",&Tsc_before_dt10);
fChain->SetBranchAddress("Tsc_before_dt11",&Tsc_before_dt11);
fChain->SetBranchAddress("Tsc_before_dt12",&Tsc_before_dt12);
fChain->SetBranchAddress("Tsc_before_dt13",&Tsc_before_dt13);
fChain->SetBranchAddress("Tsc_before_dt14",&Tsc_before_dt14);
fChain->SetBranchAddress("Tsc_before_dt15",&Tsc_before_dt15);
fChain->SetBranchAddress("Tsc_before_dt16",&Tsc_before_dt16);
fChain->SetBranchAddress("Tsc_after_dt1",&Tsc_after_dt1);
fChain->SetBranchAddress("Tsc_after_dt2",&Tsc_after_dt2);
fChain->SetBranchAddress("Tsc_after_dt3",&Tsc_after_dt3);
fChain->SetBranchAddress("Tsc_after_dt4",&Tsc_after_dt4);
fChain->SetBranchAddress("Tsc_after_dt5",&Tsc_after_dt5);
fChain->SetBranchAddress("Tsc_after_dt6",&Tsc_after_dt6);
fChain->SetBranchAddress("Tsc_after_dt7",&Tsc_after_dt7);
fChain->SetBranchAddress("Tsc_after_dt8",&Tsc_after_dt8);
fChain->SetBranchAddress("Tsc_after_dt9",&Tsc_after_dt9);
fChain->SetBranchAddress("Tsc_after_dt10",&Tsc_after_dt10);
fChain->SetBranchAddress("Tsc_after_dt11",&Tsc_after_dt11);
fChain->SetBranchAddress("Tsc_after_dt12",&Tsc_after_dt12);
fChain->SetBranchAddress("Tsc_after_dt13",&Tsc_after_dt13);
fChain->SetBranchAddress("Tsc_after_dt14",&Tsc_after_dt14);
fChain->SetBranchAddress("Tsc_after_dt15",&Tsc_after_dt15);
fChain->SetBranchAddress("Tsc_after_dt16",&Tsc_after_dt16);
fChain->SetBranchAddress("E_Xray1",&E_Xray1);
fChain->SetBranchAddress("E_Xray2",&E_Xray2);
fChain->SetBranchAddress("E_Xray3",&E_Xray3);
fChain->SetBranchAddress("E_Xray4",&E_Xray4);
fChain->SetBranchAddress("E_Xray5",&E_Xray5);
fChain->SetBranchAddress("E_si_y1",&E_si_y[1]);
fChain->SetBranchAddress("E_si_y2",&E_si_y[2]);
fChain->SetBranchAddress("E_si_y3",&E_si_y[3]);
fChain->SetBranchAddress("E_si_y4",&E_si_y[4]);
fChain->SetBranchAddress("E_si_y5",&E_si_y[5]);
fChain->SetBranchAddress("E_si_y6",&E_si_y[6]);
fChain->SetBranchAddress("E_si_y7",&E_si_y[7]);
fChain->SetBranchAddress("E_si_y8",&E_si_y[8]);
fChain->SetBranchAddress("E_si_y9",&E_si_y[9]);
fChain->SetBranchAddress("E_si_y10",&E_si_y[10]);
fChain->SetBranchAddress("E_si_y11",&E_si_y[11]);
fChain->SetBranchAddress("E_si_y12",&E_si_y[12]);
fChain->SetBranchAddress("E_si_y13",&E_si_y[13]);
fChain->SetBranchAddress("E_si_y14",&E_si_y[14]);
fChain->SetBranchAddress("E_si_y15",&E_si_y[15]);
fChain->SetBranchAddress("E_si_y16",&E_si_y[16]);
fChain->SetBranchAddress("E_si_x1",&E_si_x[1]);
fChain->SetBranchAddress("E_si_x2",&E_si_x[2]);
fChain->SetBranchAddress("E_si_x3",&E_si_x[3]);
fChain->SetBranchAddress("E_si_x4",&E_si_x[4]);
fChain->SetBranchAddress("E_si_x5",&E_si_x[5]);
fChain->SetBranchAddress("E_si_x6",&E_si_x[6]);
fChain->SetBranchAddress("E_si_x7",&E_si_x[7]);
fChain->SetBranchAddress("E_si_x8",&E_si_x[8]);
fChain->SetBranchAddress("E_si_x9",&E_si_x[9]);
fChain->SetBranchAddress("E_si_x10",&E_si_x[10]);
fChain->SetBranchAddress("E_si_x11",&E_si_x[11]);
fChain->SetBranchAddress("E_si_x12",&E_si_x[12]);
fChain->SetBranchAddress("E_si_x13",&E_si_x[13]);
fChain->SetBranchAddress("E_si_x14",&E_si_x[14]);
fChain->SetBranchAddress("E_si_x15",&E_si_x[15]);
fChain->SetBranchAddress("E_si_x16",&E_si_x[16]);
fChain->SetBranchAddress("t_Xray1",&t_Xray1);
fChain->SetBranchAddress("t_Xray2",&t_Xray2);
fChain->SetBranchAddress("t_Xray3",&t_Xray3);
fChain->SetBranchAddress("t_Xray4",&t_Xray4);
fChain->SetBranchAddress("t_Xray5",&t_Xray5);
fChain->SetBranchAddress("t_MWPC_anode",&t_MWPC_anode);
fChain->SetBranchAddress("t_MWPC_x1",&t_MWPC_x1);
fChain->SetBranchAddress("t_MWPC_x2",&t_MWPC_x2);
fChain->SetBranchAddress("t_MWPC_y1",&t_MWPC_y1);
fChain->SetBranchAddress("t_MWPC_y2",&t_MWPC_y2);
fChain->SetBranchAddress("t_si_y1",&t_si_y[1]);
fChain->SetBranchAddress("t_si_y2",&t_si_y[2]);
fChain->SetBranchAddress("t_si_y3",&t_si_y[3]);
fChain->SetBranchAddress("t_si_y4",&t_si_y[4]);
fChain->SetBranchAddress("t_si_y5",&t_si_y[5]);
fChain->SetBranchAddress("t_si_y6",&t_si_y[6]);
fChain->SetBranchAddress("t_si_y7",&t_si_y[7]);
fChain->SetBranchAddress("t_si_y8",&t_si_y[8]);
fChain->SetBranchAddress("t_si_y9",&t_si_y[9]);
fChain->SetBranchAddress("t_si_y10",&t_si_y[10]);
fChain->SetBranchAddress("t_si_y11",&t_si_y[11]);
fChain->SetBranchAddress("t_si_y12",&t_si_y[12]);
fChain->SetBranchAddress("t_si_y13",&t_si_y[13]);
fChain->SetBranchAddress("t_si_y14",&t_si_y[14]);
fChain->SetBranchAddress("t_si_y15",&t_si_y[15]);
fChain->SetBranchAddress("t_si_y16",&t_si_y[16]);
fChain->SetBranchAddress("t_si_x1",&t_si_x[1]);
fChain->SetBranchAddress("t_si_x2",&t_si_x[2]);
fChain->SetBranchAddress("t_si_x3",&t_si_x[3]);
fChain->SetBranchAddress("t_si_x4",&t_si_x[4]);
fChain->SetBranchAddress("t_si_x5",&t_si_x[5]);
fChain->SetBranchAddress("t_si_x6",&t_si_x[6]);
fChain->SetBranchAddress("t_si_x7",&t_si_x[7]);
fChain->SetBranchAddress("t_si_x8",&t_si_x[8]);
fChain->SetBranchAddress("t_si_x9",&t_si_x[9]);
fChain->SetBranchAddress("t_si_x10",&t_si_x[10]);
fChain->SetBranchAddress("t_si_x11",&t_si_x[11]);
fChain->SetBranchAddress("t_si_x12",&t_si_x[12]);
fChain->SetBranchAddress("t_si_x13",&t_si_x[13]);
fChain->SetBranchAddress("t_si_x14",&t_si_x[14]);
fChain->SetBranchAddress("t_si_x15",&t_si_x[15]);
fChain->SetBranchAddress("t_si_x16",&t_si_x[16]);
fChain->SetBranchAddress("sc_TRIDI_clk",&sc[1]);
fChain->SetBranchAddress("sc_ext_clk",&sc[2]);
fChain->SetBranchAddress("SC3",&sc[3]);
fChain->SetBranchAddress("SC4",&sc[4]);
fChain->SetBranchAddress("SC5",&sc[5]);
fChain->SetBranchAddress("SC6",&sc[6]);
fChain->SetBranchAddress("SC7",&sc[7]);
fChain->SetBranchAddress("SC8",&sc[8]);
fChain->SetBranchAddress("sc_esr_trafo",&sc[9]);
fChain->SetBranchAddress("sc_I_cooler",&sc[10]);
fChain->SetBranchAddress("sc_U_cooler",&sc[11]);
fChain->SetBranchAddress("sc_jet_E1",&sc[12]);
fChain->SetBranchAddress("sc_jet_S1",&sc[13]);
fChain->SetBranchAddress("sc_jet_S2",&sc[14]);
fChain->SetBranchAddress("sc_jet_S3",&sc[15]);
fChain->SetBranchAddress("sc_jet_S4",&sc[16]);
fChain->SetBranchAddress("sc_si_y",&sc[17]);
fChain->SetBranchAddress("sc_si_x",&sc[18]);
fChain->SetBranchAddress("sc_xray1",&sc[19]);
fChain->SetBranchAddress("sc_xray2",&sc[20]);
fChain->SetBranchAddress("sc_xray3",&sc[21]);
fChain->SetBranchAddress("sc_xray4",&sc[22]);
fChain->SetBranchAddress("sc_mwpc",&sc[23]);
fChain->SetBranchAddress("sc_xray5",&sc[24]);
fChain->SetBranchAddress("sc_mwpcCFD",&sc[25]);
fChain->SetBranchAddress("SC26",&sc[26]);
fChain->SetBranchAddress("SC27",&sc[27]);
fChain->SetBranchAddress("SC28",&sc[28]);
fChain->SetBranchAddress("SC29",&sc[29]);
fChain->SetBranchAddress("SC30",&sc[30]);
fChain->SetBranchAddress("SC31",&sc[31]);
fChain->SetBranchAddress("SC32",&sc[32]);
*/
|
| Attachment 3: Si2_run001.ana.root
|
| Attachment 4: Si2_run002.ana.root
|
|
284
|
Fri Oct 23 12:58:12 2020 |
Jan | Detectors | Test of 2nd DSSSD (gen2) | 2021 | This is the documentation of the source tests with the 2nd micron DSSSD of 2nd generation (label 3288-17, thickness 529um)
The detector is put into vacuum (~5e-6 mbar) in our test chamber. The source is positioned a few cm above (see fotos).
The Bayard-Alpert Sensor in the chamber has to be deactivated, otherwise the light emission will increase the noise on the DSSSD strongly and reduce its performance.
Additionally the current and voltage from the CAEN HV is monitored with the vulom scalers: ch.13(Icool) = current; ch.14(Ucool) = voltage.
Source: mixes alpha [239Pu, 241Am, 244Cm]
File directory: lxg1275:/data.local3/test_data_2020/
QuickTest files: si2_test_mixed_source[X].root
lmd files: Si2_run[XXX].lmd
DAQ Settings:
MADC gate : 0 delay, 5000ns width
MSCF shaping: 2 us
trlo config : e127.trlo (trigger=1/tpat=1 for Si, trigger=11 for vulom_scaler)
LMD runs:
-----------------------------
Si2_run001.lmd
Start: Fri 23.10.2020 16:19
Stop: Mon 26.10.2020 8:36
File-Size: 20GB
Events: ~53M
comment:
source roughly centered
CAEN HV scalers not connected
-----------------------------
Si2_run002.lmd
Start: Tue 27.10.2020 16:01
Stop: Wed 28.10.2020 13:26
File-Size: 12GB
Events: ~32M
comment:
source in one corner (x1, y1, see foto)
scalers should be connected now
current monitor range set to LOW
@start det_current=140nA det_voltage=90V
@end det_current=143nA det_voltage=90V
-----------------------------
Si2_run003.lmd
Start: Wed 28.10.2020 13:30
Stop: Wed 28.10.2020 13:31
File-Size:
Events:
comment:
ramping of det. voltage for scaler/U-F-Converter test
source in one corner (see foto)
scalers should be connected now
current monitor range set to LOW
@start det_current=140nA det_voltage=90V
-----------------------------
Si2_run004.lmd
Start: Tue 24.11.2020 12:50
Stop: Tue 24.11.2020
File-Size:
Events:
comment:
source in one corner (x16, y16, see foto)
@start det_current=138nA det_voltage=90V
@end det_current=nA det_voltage=90V
-----------------------------
Si2_run005.lmd
Start: Tue 24.11.2020 14:57
Stop: Tue 24.11.2020 15:11
File-Size:
Events:
comment:
source in one corner (x1, y16, see foto)
@start det_current=144nA det_voltage=90V
@end det_current=nA det_voltage=90V
-----------------------------
Si2_run006.lmd
Start: Tue 24.11.2020 15:24
Stop: Tue 24.11.2020
File-Size:
Events:
comment:
source in one corner (x1, y16, see foto)
Si_X & Si_Y cabling to MADC_0 and TDC_0 exchanged to get right order of channels/orientation
@start det_current=144nA det_voltage=90V
@end det_current=nA det_voltage=90V |
| Attachment 1: Si2_run001.jpg
|
|
| Attachment 2: Si2_run002.jpg
|
|
|
283
|
Fri Jun 5 14:06:15 2020 |
Laszlo | Detectors | DSSSD and SCRAPER position estimate for Xe and Te experiments | 2020 | We don't know the exact absolute positions of the detector (+scraper) and the beam. However, what we have to know is only these two relative positions respect to each other. To get this distance I use two methods:
1, combining the infos from the set position during the beamtime + the measured pg peak position on the detector. The pg peak position is defined only by the eye (because of the low number of counts in every case, it doesnt make much sense to make fits). Since we rely on the detector resolution, we would be never more accurate than ~ +/-1.5mm anyhow. The active area of the detector is 49.5x49.5mm2 with a 45° tilt in y.
2, MOCADI simulation of the beam and the pg peak. This is used only as a crosscheck.
3, The scraper had a small angle in y direction causing ~0.5cm shift to the upper direction. the length of the scraping edge is 7cm
-124Xe with scraper measurement:
- measurement
d1 = moved back from beam = 15 +/-.5 mm
d2 = DSSSD frame width = 8.85 mm
d3 = pg center on DSSSD = 7-7.5 bin = 21.7-23.2 mm = avg = 22.5 mm
--> pg from beam in x = -46.4mm +/- 1.5mm
--> pg on DSSSD from center ~ -3.28mm +/- 1.5mm
- simulation
x = -46.5 mm
y = 0 mm
- detector active area position
x = (-73.35mm) - (-23.85mm)
y = (-14.2195mm) - 23.5125mm
- SCRAPING: x=-35mm +/-0.5mm away from beam
y=(-20mm) - (40mm)
-118Te:
- measurement
d1 = moved back from beam = 16 +/-.5 mm
d2 = DSSSD frame width = 8.85 mm
d3 = pg center on DSSSD = 7.5 bin = 23.2 mm
--> pg from beam in x = -48.05mm +/- 1.5mm
--> pg on DSSSD from center ~ -3.28mm +/- 1.5mm
- simulation
x = -48 mm
y = 0 mm
- detector active area position
x = (-74.35mm) - (-24.85mm)
y = (-14.2195mm) - 23.5125mm
- SCRAPING:
x=-35mm +/-0.5mm away from beam
y=(-20mm) - (40mm)
notes during beam-time:
https://elog.gsi.de/esr/E127/97?suppress=1 |
| Attachment 1: SP54120060514100.pdf
|
|
| Attachment 2: DSSSD_new1.pdf
|
|
| Attachment 3: IMG_20200321_025644.jpg
|
|
|
282
|
Tue May 19 16:48:15 2020 |
Laszlo | General | E127 beamtime overview | | Here is a representation how was the time management during E127. The time, what we could spend with measuring the 118Te(pg), was ~20% comparing to the given 6days. |
| Attachment 1: E127_beamtime_overview.png
|
|
| Attachment 2: E127_beamtime_overview.pdf
|
|
|
281
|
Wed May 6 23:02:42 2020 |
Laszlo | Calibration | efficiency values | | I have calculated the efficiency values by putting the energies of the K-REC peaks into the phenomenological (empirical) function and into the linear function (see below). The K-REC peak's position I got from a Gaussian-fit on the peak. There are 5 data sets in total:
With 1. E-calibration parameters:
-124Xe low rate measurement
-118Te 1. data set (before cable-swap)
With 2. E-calibration parameters:
-118Te 2. data set (after cable-swap)
-124Xe with scraper
-124Xe without scraper
When using the 1. E-calibration parameters, the obtained K-REC energies were much offset (124Xe_lowRate E_KREC=4.00577e+01keV, 118Te_1dataset: E_KREC=3.70922e+01keV), even though I tried all possible linear combinations of the parameters for 90° and 145°. Therefore, at the end I used the theoretical energies of the K-REC peaks from Thomas's website: http://www-ap.gsi.de/Thomas/ap_html_research/energy/index.php
Most probably, the problem is not with the 1. E-calibration itself (the source measurement looks consistent), but with the changing gate width during these measurements. These problematic data sets I marked with a " * " in the tables.
90°:
|
| 124Xe_wScraper | 124Xe_woScraper | 118Te_wScraper_part1 | 118Te_wScraper_part2 | 124Xe_wScraper_lowRate
| | K-REC E [keV] | 4,6093E+01 | 4,6116E+01 | *4,3241E+01 | 4,3135E+01 | *4,6336E+01
| | g(E_KREC) (phenomenology) | 0,002285 | 0,002285 | *0,002289 | 0,002289 | *0,002284
| | l(E_KREC) (linear) | 0,002277 | 0,002277 | *0,002295 | 0,002296 | *0,002276
| | diff. betw. f(E_KREC) and g(E_KREC) | 0,35% | 0,35% | 0,26% | 0,29% | 0,38%
|
145°:
|
| 124Xe_wScraper | 124Xe_woScraper
| | K-REC E [keV] | 4,1292E+01 | 4,1275E+01
| | g(E_KREC) (phenomenology) | 0,000736 | 0,000736
| | l(E_KREC) (linear) | 0,000750 | 0,000750
| | diff. betw. f(E_KREC) and g(E_KREC) | 1,82% | 1,83%
|
35°:
|
| 124Xe_wScraper | 124Xe_woScraper
| | K-REC E [keV] | 5,2309E+01 | 5,2478E+01
| | g(E_KREC) (phenomenology) | 0,0000532 | 0,0000532
| | l(E_KREC) (linear) | 0,0000533 | 0,0000533
| | diff. betw. f(E_KREC) and g(E_KREC) | 0,15% | 0,13%
|
> I have made also the inverse square law fits. We have data only for 90degre with the 241Am source, but both for the 1. and 2. calibrations. The 1. and 2. calibration data sets treated separate.
> 2 peaks were investigated, 59.5keV and 26.3keV, at two distances 184.8mm and 217.3mm. These distances are the sum of 4 distances:
> a = width of plastic head. uncert.: +/- 0.05mm, measured with caliper.
> b = width of the brass collimator. uncert.: +/- 0.05mm, measured with caliper.
> c = width of protector plastic ring. uncert.: +/- 0.05mm, measured with caliper.
> d= distance of the paper head. uncert: +/- 0.5mm, judged by the eye 
>
> The Be window and the dead layer of the Ge detector is not taken into account.
>
> The distances calculated as D=a+b+c+d.
>
> The conclusion is that the uncertainty coming from the distance measurements are negligible compared to the other uncertainties. The data obey the inverse square law.
>
>
> > For all 3 detector the calibration data sets were combined to include the systematics in the fit results directly. Combining means not a weighted average, just simple all data points were included into the fit --> doubled efficiency value for most of the energies.
> > The g(x) = a * (1-exp(-(x-c)/b)) * exp(-x/d) function was used to describe the behavior of the Germanium detectors for the whole range of energies (global behavior). From these fits the 80keV outlier point was excluded. This is very strange that it doesn't follow the trend, it would be nice to find out why not.
> > Between 40-75keV a linear fit was carried out as well. This can also approximate quite well this local energy range, what we need for the K-REC peaks.
> > l(x) = m*x+e
> >
> > All the fits were done by gnuplot, but it was also confirmed that ROOT gives us the same parameters + errors + chisquare. One just need to choose well the starting values
> >
> >
> > 90° fits:
> > degrees of freedom (FIT_NDF) : 8
> > rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.419915
> > variance of residuals (reduced chisquare) = WSSR/ndf : 0.176329
> > p-value of the Chisq distribution (FIT_P) : 0.994094
> >
> > Final set of parameters Asymptotic Standard Error
> > ======================= ==========================
> > a = 0.00308376 +/- 0.0005144 (16.68%)
> > c = 15.6259 +/- 2.035 (13.03%)
> > b = 9.36888 +/- 3.16 (33.73%)
> > d = 177.141 +/- 84.95 (47.95%)
> >
> > degrees of freedom (FIT_NDF) : 4
> > rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.283372
> > variance of residuals (reduced chisquare) = WSSR/ndf : 0.0802998
> > p-value of the Chisq distribution (FIT_P) : 0.988405
> >
> > Final set of parameters Asymptotic Standard Error
> > ======================= ==========================
> > m = -6.22672e-06 +/- 1.836e-06 (29.48%)
> > e = 0.00256426 +/- 9.873e-05 (3.85%)
> >
> >
> >
> > 145° fits:
> > degrees of freedom (FIT_NDF) : 6
> > rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.379472
> > variance of residuals (reduced chisquare) = WSSR/ndf : 0.143999
> > p-value of the Chisq distribution (FIT_P) : 0.990247
> >
> > Final set of parameters Asymptotic Standard Error
> > ======================= ==========================
> > a = 0.0012346 +/- 0.0006794 (55.03%)
> > c = 11.3754 +/- 4.075 (35.82%)
> > b = 15.6961 +/- 13.2 (84.1%)
> > d = 116.084 +/- 99.83 (86%)
> >
> > degrees of freedom (FIT_NDF) : 2
> > rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.327728
> > variance of residuals (reduced chisquare) = WSSR/ndf : 0.107405
> > p-value of the Chisq distribution (FIT_P) : 0.898161
> >
> > Final set of parameters Asymptotic Standard Error
> > ======================= ==========================
> > m = -2.39246e-06 +/- 1.278e-06 (53.42%)
> > e = 0.000848859 +/- 7.329e-05 (8.634%)
> >
> >
> >
> > 35° fit:
> > degrees of freedom (FIT_NDF) : 7
> > rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 1.40676
> > variance of residuals (reduced chisquare) = WSSR/ndf : 1.97896
> > p-value of the Chisq distribution (FIT_P) : 0.0538635
> >
> > Final set of parameters Asymptotic Standard Error
> > ======================= ==========================
> > a = 0.000114396 +/- 0.0002367 (206.9%)
> > c = 14.3178 +/- 8.322 (58.13%)
> > b = 16.7454 +/- 43.21 (258%)
> > d = 79.7991 +/- 173.2 (217.1%)
> >
> > degrees of freedom (FIT_NDF) : 3
> > rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 1.21233
> > variance of residuals (reduced chisquare) = WSSR/ndf : 1.46975
> > p-value of the Chisq distribution (FIT_P) : 0.220529
> >
> > Final set of parameters Asymptotic Standard Error
> > ======================= ==========================
> > m = -3.7879e-07 +/- 3.143e-07 (82.99%)
> > e = 7.31447e-05 +/- 1.788e-05 (24.45%)
> >
> >
> >
> > > For the efficiency vs E fit of the 90degree Xray detector I have used the following phenomenological funciton:
> > >
> > > f(x) = a * (1-exp(-(x-c)/b)) * exp(-x/d)
> > >
> > > Here the first exponent member is a saturation curve. This part describes the passing through of the two Be windows (chamber + before detector) and through the dead layer of Ge crystal. One needs a minimum energy to enter to the detecting Ge crystal = C parameter. b parameter = characteristic absorbtion E of these nondetecting layers.
> > > The second exponent is an exponential decrease of the detector efficiency. Photons with higher energy are less detectable by the germaniums. The d parameter is the characteristic E for hard Xray and gamma (>40keV) detectability.
> > >
> > > https://www.amptek.com/internal-products/si-pin-vs-cdte-comparison
> > >
> > > //Jan's comment: the tail of this function should more or less follow a linear trend a bit above than 40 keV.
> > >
> > >
> > > In the attachment there is an example fit for 90 degree with combined 1. and 2. (before and after beamtime) calibration datasets.
> > > I made the fit with gnuplot:
> > >
> > > degrees of freedom (FIT_NDF) : 8
> > > rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.419915
> > > variance of residuals (reduced chisquare) = WSSR/ndf : 0.176329
> > > p-value of the Chisq distribution (FIT_P) : 0.994094
> > >
> > > Final set of parameters Asymptotic Standard Error
> > > ======================= ==========================
> > > a = 0.00308376 +/- 0.0005144 (16.68%)
> > > c = 15.6259 +/- 2.035 (13.03%)
> > > b = 9.36888 +/- 3.16 (33.73%)
> > > d = 177.141 +/- 84.95 (47.95%)
> > >
> > > Laszlo's out. |
| Attachment 1: 90degree_efficiency_combined.png
|
|
| Attachment 2: 90degree_efficiency_combined.ps
|
|
|
280
|
Thu Apr 30 22:55:45 2020 |
Laszlo | Calibration | inverse square law test | | I have made also the inverse square law fits. We have data only for 90degre with the 241Am source, but both for the 1. and 2. calibrations. The 1. and 2. calibration data sets treated separate.
2 peaks were investigated, 59.5keV and 26.3keV, at two distances 184.8mm and 217.3mm. These distances are the sum of 4 distances:
a = width of plastic head. uncert.: +/- 0.05mm, measured with caliper.
b = width of the brass collimator. uncert.: +/- 0.05mm, measured with caliper.
c = width of protector plastic ring. uncert.: +/- 0.05mm, measured with caliper.
d= distance of the paper head. uncert: +/- 0.5mm, judged by the eye :)
The Be window and the dead layer of the Ge detector is not taken into account.
The distances calculated as D=a+b+c+d.
The conclusion is that the uncertainty coming from the distance measurements are negligible compared to the other uncertainties. The data obey the inverse square law.
> For all 3 detector the calibration data sets were combined to include the systematics in the fit results directly. Combining means not a weighted average, just simple all data points were included into the fit --> doubled efficiency value for most of the energies.
> The g(x) = a * (1-exp(-(x-c)/b)) * exp(-x/d) function was used to describe the behavior of the Germanium detectors for the whole range of energies (global behavior). From these fits the 80keV outlier point was excluded. This is very strange that it doesn't follow the trend, it would be nice to find out why not.
> Between 40-75keV a linear fit was carried out as well. This can also approximate quite well this local energy range, what we need for the K-REC peaks.
> l(x) = m*x+e
>
> All the fits were done by gnuplot, but it was also confirmed that ROOT gives us the same parameters + errors + chisquare. One just need to choose well the starting values :)
>
>
> 90° fits:
> degrees of freedom (FIT_NDF) : 8
> rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.419915
> variance of residuals (reduced chisquare) = WSSR/ndf : 0.176329
> p-value of the Chisq distribution (FIT_P) : 0.994094
>
> Final set of parameters Asymptotic Standard Error
> ======================= ==========================
> a = 0.00308376 +/- 0.0005144 (16.68%)
> c = 15.6259 +/- 2.035 (13.03%)
> b = 9.36888 +/- 3.16 (33.73%)
> d = 177.141 +/- 84.95 (47.95%)
>
> degrees of freedom (FIT_NDF) : 4
> rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.283372
> variance of residuals (reduced chisquare) = WSSR/ndf : 0.0802998
> p-value of the Chisq distribution (FIT_P) : 0.988405
>
> Final set of parameters Asymptotic Standard Error
> ======================= ==========================
> m = -6.22672e-06 +/- 1.836e-06 (29.48%)
> e = 0.00256426 +/- 9.873e-05 (3.85%)
>
>
>
> 145° fits:
> degrees of freedom (FIT_NDF) : 6
> rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.379472
> variance of residuals (reduced chisquare) = WSSR/ndf : 0.143999
> p-value of the Chisq distribution (FIT_P) : 0.990247
>
> Final set of parameters Asymptotic Standard Error
> ======================= ==========================
> a = 0.0012346 +/- 0.0006794 (55.03%)
> c = 11.3754 +/- 4.075 (35.82%)
> b = 15.6961 +/- 13.2 (84.1%)
> d = 116.084 +/- 99.83 (86%)
>
> degrees of freedom (FIT_NDF) : 2
> rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.327728
> variance of residuals (reduced chisquare) = WSSR/ndf : 0.107405
> p-value of the Chisq distribution (FIT_P) : 0.898161
>
> Final set of parameters Asymptotic Standard Error
> ======================= ==========================
> m = -2.39246e-06 +/- 1.278e-06 (53.42%)
> e = 0.000848859 +/- 7.329e-05 (8.634%)
>
>
>
> 35° fit:
> degrees of freedom (FIT_NDF) : 7
> rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 1.40676
> variance of residuals (reduced chisquare) = WSSR/ndf : 1.97896
> p-value of the Chisq distribution (FIT_P) : 0.0538635
>
> Final set of parameters Asymptotic Standard Error
> ======================= ==========================
> a = 0.000114396 +/- 0.0002367 (206.9%)
> c = 14.3178 +/- 8.322 (58.13%)
> b = 16.7454 +/- 43.21 (258%)
> d = 79.7991 +/- 173.2 (217.1%)
>
> degrees of freedom (FIT_NDF) : 3
> rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 1.21233
> variance of residuals (reduced chisquare) = WSSR/ndf : 1.46975
> p-value of the Chisq distribution (FIT_P) : 0.220529
>
> Final set of parameters Asymptotic Standard Error
> ======================= ==========================
> m = -3.7879e-07 +/- 3.143e-07 (82.99%)
> e = 7.31447e-05 +/- 1.788e-05 (24.45%)
>
>
>
> > For the efficiency vs E fit of the 90degree Xray detector I have used the following phenomenological funciton:
> >
> > f(x) = a * (1-exp(-(x-c)/b)) * exp(-x/d)
> >
> > Here the first exponent member is a saturation curve. This part describes the passing through of the two Be windows (chamber + before detector) and through the dead layer of Ge crystal. One needs a minimum energy to enter to the detecting Ge crystal = C parameter. b parameter = characteristic absorbtion E of these nondetecting layers.
> > The second exponent is an exponential decrease of the detector efficiency. Photons with higher energy are less detectable by the germaniums. The d parameter is the characteristic E for hard Xray and gamma (>40keV) detectability.
> >
> > https://www.amptek.com/internal-products/si-pin-vs-cdte-comparison
> >
> > //Jan's comment: the tail of this function should more or less follow a linear trend a bit above than 40 keV.
> >
> >
> > In the attachment there is an example fit for 90 degree with combined 1. and 2. (before and after beamtime) calibration datasets.
> > I made the fit with gnuplot:
> >
> > degrees of freedom (FIT_NDF) : 8
> > rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.419915
> > variance of residuals (reduced chisquare) = WSSR/ndf : 0.176329
> > p-value of the Chisq distribution (FIT_P) : 0.994094
> >
> > Final set of parameters Asymptotic Standard Error
> > ======================= ==========================
> > a = 0.00308376 +/- 0.0005144 (16.68%)
> > c = 15.6259 +/- 2.035 (13.03%)
> > b = 9.36888 +/- 3.16 (33.73%)
> > d = 177.141 +/- 84.95 (47.95%)
> >
> > Laszlo's out. |
| Attachment 1: inverse_square_law.zip
|
|
279
|
Thu Apr 30 17:40:57 2020 |
Laszlo | Calibration | efficiency fits | | For all 3 detector the calibration data sets were combined to include the systematics in the fit results directly. Combining means not a weighted average, just simple all data points were included into the fit --> doubled efficiency value for most of the energies.
The g(x) = a * (1-exp(-(x-c)/b)) * exp(-x/d) function was used to describe the behavior of the Germanium detectors for the whole range of energies (global behavior). From these fits the 80keV outlier point was excluded. This is very strange that it doesn't follow the trend, it would be nice to find out why not.
Between 40-75keV a linear fit was carried out as well. This can also approximate quite well this local energy range, what we need for the K-REC peaks.
l(x) = m*x+e
All the fits were done by gnuplot, but it was also confirmed that ROOT gives us the same parameters + errors + chisquare. One just need to choose well the starting values :)
90° fits:
degrees of freedom (FIT_NDF) : 8
rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.419915
variance of residuals (reduced chisquare) = WSSR/ndf : 0.176329
p-value of the Chisq distribution (FIT_P) : 0.994094
Final set of parameters Asymptotic Standard Error
======================= ==========================
a = 0.00308376 +/- 0.0005144 (16.68%)
c = 15.6259 +/- 2.035 (13.03%)
b = 9.36888 +/- 3.16 (33.73%)
d = 177.141 +/- 84.95 (47.95%)
degrees of freedom (FIT_NDF) : 4
rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.283372
variance of residuals (reduced chisquare) = WSSR/ndf : 0.0802998
p-value of the Chisq distribution (FIT_P) : 0.988405
Final set of parameters Asymptotic Standard Error
======================= ==========================
m = -6.22672e-06 +/- 1.836e-06 (29.48%)
e = 0.00256426 +/- 9.873e-05 (3.85%)
145° fits:
degrees of freedom (FIT_NDF) : 6
rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.379472
variance of residuals (reduced chisquare) = WSSR/ndf : 0.143999
p-value of the Chisq distribution (FIT_P) : 0.990247
Final set of parameters Asymptotic Standard Error
======================= ==========================
a = 0.0012346 +/- 0.0006794 (55.03%)
c = 11.3754 +/- 4.075 (35.82%)
b = 15.6961 +/- 13.2 (84.1%)
d = 116.084 +/- 99.83 (86%)
degrees of freedom (FIT_NDF) : 2
rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.327728
variance of residuals (reduced chisquare) = WSSR/ndf : 0.107405
p-value of the Chisq distribution (FIT_P) : 0.898161
Final set of parameters Asymptotic Standard Error
======================= ==========================
m = -2.39246e-06 +/- 1.278e-06 (53.42%)
e = 0.000848859 +/- 7.329e-05 (8.634%)
35° fit:
degrees of freedom (FIT_NDF) : 7
rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 1.40676
variance of residuals (reduced chisquare) = WSSR/ndf : 1.97896
p-value of the Chisq distribution (FIT_P) : 0.0538635
Final set of parameters Asymptotic Standard Error
======================= ==========================
a = 0.000114396 +/- 0.0002367 (206.9%)
c = 14.3178 +/- 8.322 (58.13%)
b = 16.7454 +/- 43.21 (258%)
d = 79.7991 +/- 173.2 (217.1%)
degrees of freedom (FIT_NDF) : 3
rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 1.21233
variance of residuals (reduced chisquare) = WSSR/ndf : 1.46975
p-value of the Chisq distribution (FIT_P) : 0.220529
Final set of parameters Asymptotic Standard Error
======================= ==========================
m = -3.7879e-07 +/- 3.143e-07 (82.99%)
e = 7.31447e-05 +/- 1.788e-05 (24.45%)
> For the efficiency vs E fit of the 90degree Xray detector I have used the following phenomenological funciton:
>
> f(x) = a * (1-exp(-(x-c)/b)) * exp(-x/d)
>
> Here the first exponent member is a saturation curve. This part describes the passing through of the two Be windows (chamber + before detector) and through the dead layer of Ge crystal. One needs a minimum energy to enter to the detecting Ge crystal = C parameter. b parameter = characteristic absorbtion E of these nondetecting layers.
> The second exponent is an exponential decrease of the detector efficiency. Photons with higher energy are less detectable by the germaniums. The d parameter is the characteristic E for hard Xray and gamma (>40keV) detectability.
>
> https://www.amptek.com/internal-products/si-pin-vs-cdte-comparison
>
> //Jan's comment: the tail of this function should more or less follow a linear trend a bit above than 40 keV.
>
>
> In the attachment there is an example fit for 90 degree with combined 1. and 2. (before and after beamtime) calibration datasets.
> I made the fit with gnuplot:
>
> degrees of freedom (FIT_NDF) : 8
> rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.419915
> variance of residuals (reduced chisquare) = WSSR/ndf : 0.176329
> p-value of the Chisq distribution (FIT_P) : 0.994094
>
> Final set of parameters Asymptotic Standard Error
> ======================= ==========================
> a = 0.00308376 +/- 0.0005144 (16.68%)
> c = 15.6259 +/- 2.035 (13.03%)
> b = 9.36888 +/- 3.16 (33.73%)
> d = 177.141 +/- 84.95 (47.95%)
>
> Laszlo's out. |
| Attachment 1: 90degree_efficiency.zip
|
| Attachment 2: 145degree_efficiency.zip
|
| Attachment 3: 35degree_efficiency.zip
|
|
278
|
Wed Apr 29 16:06:28 2020 |
Laszlo | Calibration | efficiency fit - 90degree, combined dataset | | For the efficiency vs E fit of the 90degree Xray detector I have used the following phenomenological funciton:
f(x) = a * (1-exp(-(x-c)/b)) * exp(-x/d)
Here the first exponent member is a saturation curve. This part describes the passing through of the two Be windows (chamber + before detector) and through the dead layer of Ge crystal. One needs a minimum energy to enter to the detecting Ge crystal = C parameter. b parameter = characteristic absorbtion E of these nondetecting layers.
The second exponent is an exponential decrease of the detector efficiency. Photons with higher energy are less detectable by the germaniums. The d parameter is the characteristic E for hard Xray and gamma (>40keV) detectability.
https://www.amptek.com/internal-products/si-pin-vs-cdte-comparison
//Jan's comment: the tail of this function should more or less follow a linear trend a bit above than 40 keV.
In the attachment there is an example fit for 90 degree with combined 1. and 2. (before and after beamtime) calibration datasets.
I made the fit with gnuplot:
degrees of freedom (FIT_NDF) : 8
rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.419915
variance of residuals (reduced chisquare) = WSSR/ndf : 0.176329
p-value of the Chisq distribution (FIT_P) : 0.994094
Final set of parameters Asymptotic Standard Error
======================= ==========================
a = 0.00308376 +/- 0.0005144 (16.68%)
c = 15.6259 +/- 2.035 (13.03%)
b = 9.36888 +/- 3.16 (33.73%)
d = 177.141 +/- 84.95 (47.95%)
Laszlo's out. |
| Attachment 1: efficiency_90degree-1an2datasets_phen_lin.png
|
|
| Attachment 2: efficiency_90degree-1an2datasets_phen_lin_bigRange.png
|
|
|
277
|
Thu Apr 23 19:09:58 2020 |
Laszlo | Calibration | theoretical K-REC cross sections | | Find attached Andrey Surzhykov's calculations for the theta angle in respect to the beam direction (in lab. frame) vs. cross section for 124Xe54+ and 118Te52+.
The calculations made for collision with two H atoms with the accuracy of 1%. There are no molecular corrections done, but these corrections are within 1%.
The photon-emission is symmetrical in the azimuthal phi angle, but asymetric in theta. The K-REC cross section is given for each integer theta angle. The problem is that our 90° and 145° xray detectors cover more integer theta-angles --> The disk shaped entrance window of the Xray-detectors is sliced for each covered theta angles, and the CS values are averaged together with the weights of the area of the corresponding slice. The 35° det had a non-disk shaped slit collimator! Was it aligned vertical or horizontal or random? I assumed that it had a vertical position --> only cs at theta=35° needs to taken into account
|
| 90° | 145° | 35°
| | weighted cs_Xe [barn/sr] | 128,444 | 41,967 | 45,550
| | weighted cs_Te [barn/sr] | 118,616 | 38,918 | 41,740
|
For the steradian values I calculated the area of the entrance window of the Xray detectors and I divided it with the area of the sphere with radius = distance between source and det. If r=radius of the entrance window, D=distance between source and det.: covered steradian = r^2*pi/(4*pi*D^2) [%], covered steradian = 4Pi*[r^2*pi/(4*pi*D^2)] [4pi]. This is valid for the 90° and 145° Xray detectors. The area of 35° det. was calculated individually.
|
| 90° | 145° | 35°
| | sr [%] | 0,00237 | 0,00076 | 0,00002
| | sr [4pi] | 0,0298 | 0,0096 | 0,00030
|
I converted barn/sr to barn in the following way: steradian[4pi]*weigthed_cs [barn/sr] = weigthed_cs [barn]. I am not 100% sure if I need here the steradian in [4pi] or in [%].
|
| 90° | 145° | 35°
| | weighted cs_Xe [barn] | 3,8247 | 0,4012 | 0,0137
| | weighted cs_Te [barn] | 3,5321 | 0,3720 | 0,0125
|
|
| Attachment 1: CS_theory_all.png
|
|
| Attachment 2: CS_theory_all.ps
|
|
| Attachment 3: CS_theory_90Xe.png
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|
| Attachment 4: CS_theory_90Xe.ps
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|
| Attachment 5: CS_theory_90Te.png
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|
| Attachment 6: CS_theory_90Te.ps
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|
| Attachment 7: DCS_Z_54_Tp_10MeV.dat
|
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180. 0.1817710216397566
|
| Attachment 8: DCS_Z_52_Tp_10MeV.dat
|
0. 0.6838809884595187
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| Attachment 9: source_vs_XrayDet_sketch.pdf
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|
|