| ID |
Date |
Author |
Category |
Subject |
|
43
|
Sat Mar 28 18:11:13 2020 |
Alex, Yuri | General | no beam in the ESR |
Yuri and Sergey (on phone) have investigated extensively the problem with having no beam in the ESR. The FRS has been checked and seems OK. The ESR is fine as well.
The problem seems to be the timing. Ths SIS and the ESR seem to be completely out of synchronization. The on-call service for the control system has been called. |
|
178
|
Thu Nov 19 09:14:40 2020 |
Jan | Detectors | remote MSCF settings for CsISiPHOS |
Attached is a list of all set values for the 5 MSCF shaper modules.
This was done prior to run0251, which served as a final benchmark for those settings.
See: https://elog.gsi.de/esr/E121/62
And https://elog.gsi.de/esr/E121/104
The det. to MSCF assignment is the following:
MSCF 1: Si-pad 1 + 2 p-side/strips (ch. 1-7 + ch. 9-15)
MSCF 2: Si-pad 3 + 4 p-side/strips (ch. 1-7 + ch. 9-15)
MSCF 3: Si-pad 5 p-side/strips (ch. 1-7)
MSCF 4: Si-pad 6 p-side/strips (ch. 1-7)
MSCF 5: DSSD (ch. 1 - 4); CsI (ch. 7 & 8); Si-pad n-sides (ch. 11 - 16)
Note that only the pre-amplification stage of the MSI-8 amplifiers were used for all channels. |
|
44
|
Sun Mar 29 09:40:35 2020 |
ruijiu | DAQ | restart go4 |
go4 crush up.
the problem is
due to mbs.
restart mbs.
see an error.
restart again.
the mbs and go4
are working
working. |
|
177
|
Thu Nov 5 15:13:43 2020 |
Jan | Analysis | root script example |
Attached is an example root script/macro that shows how to use scripts for analysis.
Usage:
1. change INPUT and OUTPUT preprocessor variables in e121_analysis.c pointing to your desired input and output root-files.
2. open root and type: root [1] .L e121_analysis.C++
root [2] run() 3. check plots popping up and output files
Hints:
in e121_analysis.C use #include "e121_raw.h" for the original channel names/mapping (e.g. ADC1_1,...)
and use#include "e121_mapped.h" for named channels (e.g. e_csi[0] or e_dssd_top) |
|
50
|
Sun Mar 29 13:04:32 2020 |
Ragan, RuiJiu | Runs | run file: 1298 |
The Tl fragments are being stacked (almost ~20 staacks) and tried to store nicely in ESR.
The plan is to see the number of contaminants on the inner detector (CsISiPHOS) after the gas jet is on (Ar gas jet) and minimise this number for different FRS settings !!
P.S. Prayers have magical powers :) :) |
|
62
|
Sun Mar 29 23:48:12 2020 |
Jan | Analysis | run0251: E_spectra for CsISiPhos |
This is a collection of energy spectra of the CsISiPhos detectors from run0251 with primary beam.
There is no good spectra for n-side of Si-pad 1! |
|
104
|
Mon Mar 30 23:30:35 2020 |
Jan | Analysis | run251 - Si-pad performance & status |
Attached are plots for Si-pad 2 with hits from ionization of 206Pb81+ at the target.
The plots are representative for all Si-pads, the pattern is always the same!
y-axis: E n-side
x-axis: E p-side strip
condition: E_gate on peak in CsI
While strips 1, 2 and 7 look fine, strips 3 and 6 show already signs of degradation.
For strips 4 and 5, it is clearly visible that something is wrong.
Those are the central strips, which probably see the most rate.
The same dataset was analyzed here: https://elog.gsi.de/esr/E121/62
This might be a hint to a radiation damage or to the fact that we operate at too low bias voltage (32 Volt).
Maybe it recovers if we increase bias to 60 Volt. |
|
120
|
Thu Apr 2 12:52:25 2020 |
ruijiu | General | setup FRS with 2 g/cm2 degrader. |
Yuri sets up FRS with 2 g/cm2 degrader (previous one is 1 g/cm2). The ESR is not changed. The contamination should be less now. |
|
3
|
Wed Dec 5 17:29:24 2018 |
Chen, Sidhu | Detectors | signal map |
Description:
Here is a summary of signal map. The charged particle detector includes 6 layers of Si-Pad, 1 DSSD and 1 CsI.
All these detectors are installed inside the detector pocket. All signals are connected to one PCB which is attached on the pocket, then are connected
to the PCB of the flange by high density cable. This document descripts the signal map on the PCB of the detector
pocket and flange.
The signal maps of the PCB of the detector pocket are shown as follow:
 |
|
51
|
Sun Mar 29 13:05:36 2020 |
ruijiu | DAQ | start ntcap |
IQ_2020-03-29_13-05-
56
SC_2020-03-29_13-05-
56 |
|
37
|
Sat Mar 28 15:07:40 2020 |
ruijiu | DAQ | start run |
|
|
38
|
Sat Mar 28 15:19:23 2020 |
ruijiu | | start run e121_run_0236.lmd |
store 206Pb81+ beam inside ESR and measure its halflife.
The HV of detector is off.
Start DAQ to record the ESR current in lmd file.
Nik is optimizing the gas jet target. So this file is still test run. |
|
46
|
Sun Mar 29 10:09:14 2020 |
ruijiu | | start run e121_run_0237.lmd |
Sergey and Yuri are tuning Tl beam. The particle number in ers is about 1e4. I(SIS)=5e8
run stop: after few minutes (garbage data) |
|
48
|
Sun Mar 29 11:12:00 2020 |
Ragan | Runs | start run e121_run_0239.lmd |
Sergey and Yuri are tuning Tl beam. The particle number in ers is about 1e4. I(SIS)=5e8
some events on MWPC can be seen ! |
|
98
|
Mon Mar 30 14:24:46 2020 |
ruijiu | DAQ | stop taking data. |
1. stop run0272.lmd.
2. stop NTCAP.
NTCAp file:
SC_2020-03-30_09-28-14
IQ_2020-03-30_09-28-14
(saved in drive: p) |
|
45
|
Sun Mar 29 09:57:26 2020 |
ruijiu | Detectors | the HV of charged particle detector |
MHV1 MHV2
ch1:1st Sipad 4th
Sipad
ch2:2nd Sipad 6th
Sipad
ch3:3rd Sipad DSSD
ch4:4th Sipad CsI |
|
111
|
Wed Apr 1 01:02:24 2020 |
ruijiu | Detectors | the detector cable is disconnected. |
|
|
100
|
Mon Mar 30 15:03:58 2020 |
ruijiu Tino, Yuri, Lasoro, Nik and Uli | Detectors | the gas bottle is empty. |
The gas bottle was empty. Tino replaced
the previous old bottle with 50 bar gas left.
Yuri is getting new gas bottles.
Yuri got a new gas bottle. We repalced
the the new gas bottle. There is 200
bar gas left now.
The old gas bottle with 50 bar gas
left was kept inside ESR.
The empty gas bottle was removed from
ESR.
The outlet volve was decreased by 30 degree.
Since the value is almost 0, we can not read the value of outlet volve. |
|
101
|
Mon Mar 30 16:25:05 2020 |
ruijiu | Detectors | turn down the HV |
turn down the hv and pull out the detector.
suggest by
Hi everybody,
is there now much more rate on the detectors?
Perhaps it helps to turn down the bias for a while and to take the detectors out of the beam, by pulling the pocket out?
And then see if the leakage current comes down again.
good luck, Thomas
***********************************************
Dr. Thomas Faestermann | Tel: +49-89-2723868
Physik Department E12 |
Techn. Univ. Muenchen | Mob: +49-1626193388 |
|
10
|
Wed Jun 26 16:20:31 2019 |
Jan | DAQ | unpacker: lmd > root |
I have written an unpacker for the lmd data taken with the current daq-system for E121.
The crate configuration is as follows:
ADC1 channels 1-32 (Caen 785)
ADC2 channels 1-32 (Caen 785)
ADC3 channels 1-32 (Caen 785)
SCALER channels 1-32 (Caen 830)
The unpacker binary can be found here
/u/litv-exp/unpacker/unpackexps/E121/E121
The current spec file is attached.
To convert lmd-files to root-files, please use it as follows:litv-exp@lxg___: E121_unpacker /path/to/file.lmd --ntuple=RAW,/path/to/new_file.root |