 Tue Dec 15 09:25:41 2020, Jan, DAQ, SiCsIPhos signal/amplitude reconstruction 
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Mon Mar 29 16:31:09 2021, Pierre-Michel, DAQ, cross section
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(1.393*^-8 + 3.18*^-13 + 4.707*^-8)/4.707*^-8 = 1.29595 |
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Wed Aug 25 15:13:41 2021, Jan, DAQ, SC13 clock frequency
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The frequency of the clock used as reference in scaler channel 13 has been measured precisely.
In contrast to what was expected (1.5MHz precisely), it is:
f_ref = 1.5625(5) MHz |
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Thu Sep 13 11:32:17 2018, Jan Glorius, Collaboration, Proposal
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| Attached is the beam time proposal submitted and accepted by the G-PAC in 2017. |
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Sun Mar 29 18:41:31 2020, ruijiu, Analysis, Ratio between MPWC rate and DSSD rate
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slit Ratio error
-1 18.64 0.4
-2 18.18 0.38
-3 20.85 0.5
-4 18.15 0.34
-5 17.44 0.31
-6 17.38 0.32
-7 17.82 0.32
-8 16.41 0.27
-9 18.51 0.37 |
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Sun Mar 29 21:02:43 2020, ruijiu, Analysis, decay line of 205Tl beam
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decay line of 205Tl beam with Ar gas jet target on and S6 slit at -8mm
Ar gas density~1e12 atoms/cm2 |
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Sun Mar 29 21:39:27 2020, ruijiu, Analysis, Ionization cross section and capture cross section for h-206Pb + Ar
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Ionization cross section = 1320 barn.
Capture cross section = 557+137+44.5=735.5.
sigma_Ion/sigma_cap=1.79 |
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Sun Mar 29 23:48:12 2020, Jan, Analysis, run0251: E_spectra for CsISiPhos 14x
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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! |
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Mon Mar 30 16:37:53 2020, ruijiu, Analysis,
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Mon Mar 30 23:30:35 2020, Jan, Analysis, run251 - Si-pad performance & status 7x
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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. |
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Tue Mar 31 15:30:43 2020, ruijiu, Analysis, The beam position on DSSD with different conditions on on the dEE spectrum 6x
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I analyzed the first measurement with 206Pb81+ beam, run 250-267. |
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Fri Apr 17 18:27:34 2020, ruijiu, Analysis, backup data
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1.connect USB harddisk to computer lxg1254 and copy data to sever.
sync -rtmv --progress --checkSUD /media/sdgl/data/ litv-exp@sbk0l9:/lustre/ap/litv-exp/2020-
04-14 e121_rchen/NTCAP/hd1
2020.05.02 08:06 copied 11.88 TB to server. 1.8TB rest on hard disk. |
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Wed Aug 5 17:19:16 2020, Rui-Jiu Chen, Analysis, Data structure
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Thu Nov 5 15:13:43 2020, Jan, Analysis, root script example
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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) |
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Sat Mar 28 15:19:23 2020, ruijiu, , start run e121_run_0236.lmd
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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. |
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Sun Mar 29 10:09:14 2020, ruijiu, , start run e121_run_0237.lmd
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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) |
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Sun Mar 29 13:43:46 2020, , ,
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Sun Mar 29 14:01:45 2020, ruijiu, , beam position on DSSD
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move the detector 1cm
outside.from 60mm to
70mm.
left direction is
outside. right direction
is
inside(close to beam).
the spot is moving from
left to right. |
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Sun Mar 29 14:29:13 2020, ruijiu, , e121_run_00240.lmd
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s6 positon at 50mm. |
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Thu Apr 9 11:47:28 2020, ruijiu, , backup data
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2020.4.8 12:00Started copying
data。
2020.4.9 11:52 Copied 6.3TB
data. The copy speed is 65-67MB/s.
2020.4.15 Bring the two USB hard disk to my office and connect them to lxg1298 computer.
Send email |