HOME ESR EXPERIMENTS LABS etc
E121 E127 E132 E125 E143 laser_cooling_2021 E142 Ê128 E146 E0052 E0018
  proton-capture on 118Te, Page 15 of 29  Not logged in ELOG logo
ID Date Author Category Subjectup Year
  358   Thu May 20 18:11:24 2021 LaszloGeneralTouching the beam with Dsssd - current change2021
Attachment 1: IMG_20210520_180857.jpg
IMG_20210520_180857.jpg
  448   Tue May 25 15:56:48 2021 Robert/ShahabAcceleratorTrafo2021
Trafo was set to 0
  292   Wed Apr 28 09:12:47 2021 Jan, YuriDetectorsUI-diagram2021
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
UI_meas_curve.pdf
  574   Thu Jun 24 09:43:01 2021 Jan GloriusDAQUnpacker2021
The unpacker used for the production runs of E127b is located at 
/u/litv-exp/unpacker/unpackexps/e127_TO_2021_with_ECL

It is also aliased for litv-exp user as: E127_unpack

This is for the data structure as documented here:
https://elog.gsi.de/esr/E127/346

As of now, this is compiled for ROOT v6-18-04 located here:
/cvmfs/csee.gsi.de/root/618-04/bin/root
  25   Wed Oct 23 14:51:43 2019 Jan, LaszloDAQVME modules & main.cfg 
Here is the current list of VME modules in our DRASI daq including HW addresses:

Slot <module> [HW addr.]

1 <RIO4>
2 <Vulom4b> [0500]
3 <ENV3>
5 <scaler V830> [00E1]
7 <scaler V830> [00E2]
15 <TDC V775> [00C1]
17 <TDC V775> [00C2]
19 <MADC> [00A1]
21 <MADC> [00A2]

See also main.cfg attached
Attachment 1: main.cfg
CRATE("Master")
{
	GSI_VULOM(0x05000000) {
		trlo2_master = true
	}
	MESYTEC_MADC32(0x00A10000) {
		  nim_busy = gate0
   	          range = 10 V
		  resolution=8
		  hires=true
	}
	BARRIER
	MESYTEC_MADC32(0x00A20000) {
	          nim_busy = gate0
		  range = 10 V
		  resolution=8
		  hires=true
	}
	BARRIER
	CAEN_V775 (0x00C10000) {
		  common_start = false
		  time_range = 1200 ns
		  suppress_invalid = true
		  suppress_over_range = true
	}
	BARRIER
	CAEN_V775 (0x00C20000) {
		  common_start = false
		  time_range = 1200 ns
		  suppress_invalid = true
		  suppress_over_range = true
	}
	BARRIER
        CAEN_V830 (0x00E10000) {
		  resolution = 32	
        }
	BARRIER
	CAEN_V830 (0x00E20000) {
		  resolution = 32
	}
}
  359   Thu May 20 18:13:55 2021 LaszloGeneralVacuum change while Si movement2021
The vacuum remained in the E-10 range after moving the dsssd. The oscillation in the vacuum.values are due to the 
magnets ramping up and down
Attachment 1: IMG_20210520_174632.jpg
IMG_20210520_174632.jpg
  183   Sun Mar 22 12:01:44 2020 Esther, RaganGeneralVacuum problem with SIS 
There is some problem with the vacuum in SIS and thus data recording is stopped.
  91   Fri Mar 20 23:43:26 2020 LaszloGeneralVacuum while moving in the detector at yesterday evening 
Vacuum before DSSSD movement: 1.5844E-11
Top value after movement: 3.64378E-11

This oscillating effect is due to magnets?
Attachment 1: DSSSD_moving_vacuum_change.JPG
DSSSD_moving_vacuum_change.JPG
Attachment 2: IMG_20200320_021131.jpg
IMG_20200320_021131.jpg
  92   Sat Mar 21 01:25:07 2020 LaszloGeneralVacuum while moving in the detector for fragment measurement 
Stayed below E-10
Start:2.42E-11
Top after moving: 4.144E-11
Attachment 1: DSSSD_moving_vacuum_change1.JPG
DSSSD_moving_vacuum_change1.JPG
  397   Sat May 22 21:33:22 2021 LaszloDetectorsXray detectors are filled at 90 and 352021
  270   Sun Apr 5 20:34:42 2020 LaszloCalibrationXray energies - 1. calibration 
30angle:  E[keV] = 0.0158507 *ch-2.07456
90angle:  E[keV] = 0.01950*ch-2.76
145angle: E[keV] = 0.017988  *ch-1.809

I could identify 2 peaks in the 241Am spectra and 4 peaks in the 133Ba. These peaks are fitted with a gaussian to get their position --> linear energy calibration for the combined (Am+Ba) data sets for each detector. The function I used: E(ch) [keV] = m*ch+b
Attachment 1: 90angle_Xray_first_calibration.png
90angle_Xray_first_calibration.png
Attachment 2: 30angle_Xray_first_calibration.png
30angle_Xray_first_calibration.png
Attachment 3: 145angle_Xray_first_calibration.png
145angle_Xray_first_calibration.png
Attachment 4: 90_det_calib_Am_Ba.cal
#gaus fit, gaus fit error, literature (nndc), literature error
#literature used:
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=241AM&unc=nds
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=133BA&unc=nds
#where there is no error given, I put +/-.5 to the last digit
1493.31 0.26 26.3446 0.0002
3194.81 0.053 59.5409 0.0001
1721.92 0.0574 30.973 0.0005
1937.28 0.163 34.987 0.0005
2864.67 0.443 53.1622 0.0006
4292.25 0.122 80.9979 0.0011

Attachment 5: 30_det_calib_Am_Ba.cal
#gaus fit, gaus fit error, literature (nndc), literature error
#literature used:
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=241AM&unc=nds
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=133BA&unc=nds
#where there is no error given, I put +/-.5 to the last digit
1.79319e+03 3.88460e-01 26.3446 0.0002
3.88726e+03 1.00448e-01 59.5409 0.0001
2.08381e+03 5.25334e-02 30.973 0.0005
2.33719e+03 3.17859e-02 34.987 0.0005
3.48482e+03 1.03952e-01 53.1622 0.0006
5.24059e+03 2.54968e-02 80.9979 0.0011

Attachment 6: 145_det_calib_Am_Ba.cal
#gaus fit, gaus fit error, literature (nndc), literature error
#literature used:
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=241AM&unc=nds
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=133BA&unc=nds
#where there is no error given, I put +/-.5 to the last digit
1.56549e+03 1.83848e-01 26.3446 0.0002
3.41036e+03 4.20525e-02 59.5409 0.0001
1.81904e+03 3.15736e-02 30.973 0.0005
2.04758e+03 8.68290e-02 34.987 0.0005
3.06014e+03 1.98896e-01 53.1622 0.0006
4.61345e+03 5.23412e-02 80.9979 0.0011

Attachment 7: run041_133Ba_high_90.svg
run041_133Ba_high_90.svg
Attachment 8: run040_241Am_90.svg
run040_241Am_90.svg
  87   Fri Mar 20 19:37:43 2020 JanCalibrationXray energies - rough 1. calibration  
-- E calibration seems to have changed! ---

This calibration is based on the source data taken before the experiment:

Xray1: E [keV] = ch*0.01582-1.963
Xray2: E [keV] = ch*0.01799-1.803
Xray3: E [keV] = ch*0.01941-2.618
  305   Mon May 3 14:55:44 2021 Jan GloriusCalibrationXray energy calib. table2021
Here is the table of energy calibration lines from Am241 for all Xray detectors for several measurements.
Also the linear fit parameters [ E(ch) = A*ch + B ] are given at the bottom of the table.

E [keV] xray90 (GEM1800) xray35 (GLP) xray145 (GEM3000)
lab (28.04.21) lab (04.05.21) lab (11.05.21)
59.54 2402.45 ch 2399.07 ch 2423.24 ch
26.34 1107.38 ch 1116.65 ch 1127.94 ch
13.95 624.33 ch 638.38 ch 645.39 ch
slope A 0.0256387 keV/ch 0.0258923 keV/ch 0.0256408 keV/ch
offset B -2.05477 keV -2.57638 keV -2.59114 keV
  297   Fri Apr 30 10:55:34 2021 Jan GloriusDAQXray multi-triggers - blocking gate2021
From the CFD of Xray1 (90deg) we get multiple trigger signals every ~5sec for unknown reasons. 
No hint from the preamp signals.

The solution now is to have an extended blocking gate active in the trlo-config of node 2.
There is now a trigger_stretch of 2500ns for all Xray triggers:

trig_stretch(1)  = 2500ns;
trig_stretch(2)  = 2500ns;
trig_stretch(3)  = 2500ns;

This prevents the multiple triggers to reach the lmu (before_dt scalers)
However, this will also lead to a very small loss of good signal triggers that overlay within 2.5 us.

This has to be taken into account for deadtime determination.
  344   Sun May 16 11:54:12 2021 Jan GloriusCalibrationXray performance in lab2021
These are the current Xray detector performances in the lab using data from run0046

det DAQ ch threshold resolution @ 60keV
GEM1800 xray1 5keV 495eV
GLP2000 xray2 5keV 430eV
GEM3000 xray3 7keV 525eV
  307   Tue May 4 14:34:51 2021 Jan GloriusDetectorsXray weight control induces signals2021
When the readout/control of the det. weight control via serial connection is active, there is a clear signal induced in the Xray detectors for each command sent.

The solution for now is, that we activate weight control NOT DURING MEASUREMENT!
  86   Fri Mar 20 16:58:02 2020 JanDAQXray2 & Xray3 cabling 
We found that Xray2 and Xray3 the cabling is not consistent:

90 degree detector 
> E_Xray2 for energy
> t_Xray3 for times

145 degree detector
> E_Xray3 for energy
> t_Xray2 for timing

35 degree detector
> E_Xray1
> t_Xray1

We can run like this, but should be aware of it!
  469   Wed May 26 14:28:23 2021 JanAnalysisXrays from 118Te & 124Xe2021
Attached is a plot of the uncalibrated energy spectra taken with the 90 degree xray detector for 118Te (red) and 124Xe (blue).
Shown is the region covering the K-alpha and K-REC peaks.

Calculating the ratios (Te/Xe) for K_alpha and K-REC energies from theory one gets:

K_alpha (theory): 0.9236  
K-REC   (theory): 0.9308

Without energy calibration we get the following ratio (using channel numbers):

K_alpha (exp): 0.9293  
K-REC   (exp): 0.9344

Taking into account that the channel numbers are not calibrated, the agreement is still very good.

In summary we can be sure that we have 118Te stored at 7AMeV.
Attachment 1: xray90_124Xe_118Te.png
xray90_124Xe_118Te.png
  204   Sun Mar 22 19:49:12 2020 Michael, Laszlo, Yuri Yuri is still tuning FRS 
We filled the Xray detectors.
Yuri is sill tuning FRS for primary beam.
  227   Mon Mar 23 07:56:51 2020 LaszloGeneralYuri made magick and we operate again 
DSSSD was moved out (HV switched off)
also the scraper was mistakenly moved.

Now we move everything back to its original position

We leave the scraper still in the "scraping position" in order to collect more data.
Soon we should switch to "without sctraper mode"
ELOG V3.1.5-fc6679b