 Mon Mar 30 07:02:15 2020, tino, Runs, Second measurement with 206Pb81+ beam at I_cooler = 20 mA
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I_cooler = 20 mA
beam: 206Pb81+
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Sat Mar 28 16:12:25 2020, ruijiu, ragan, DAQ, enter ESR and turn on the HV crate.
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Tue Feb 25 15:48:31 2020, ruijiu chen, DAQ, Important folders of e121 eperiments:
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1. slow control:
1.1. program file:
litv-exp@ringpi:~/epics/mrcc_ioc/db $
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Tue Feb 25 15:49:58 2020, ruijiu chen, DAQ, changing scaling factor.
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How to change scaling factor?
The parameters is in f_user.c file:
1. open the f_user.C with emacs :
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Mon Mar 30 14:48:02 2020, ruijiu and Tino, Detectors, The leakcurrent of SiPad is over the setting limit. 
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Because the
leakcurrent of
6 Sipads is
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Mon Mar 30 15:03:58 2020, ruijiu Tino, Yuri, Lasoro, Nik and Uli, Detectors, the gas bottle is empty.
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The gas bottle was empty. Tino replaced
the previous old bottle with 50 bar gas left.
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Sat Mar 28 15:07:40 2020, ruijiu, DAQ, start run
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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.
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Sun Mar 29 09:40:35 2020, ruijiu, DAQ, restart go4
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go4 crush up.
the problem is
due to mbs.
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Sun Mar 29 09:57:26 2020, ruijiu, Detectors, the HV of charged particle detector
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MHV1 MHV2
ch1:1st Sipad 4th
Sipad
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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 13:05:36 2020, ruijiu, DAQ, start ntcap
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IQ_2020-03-29_13-05-
56
SC_2020-03-29_13-05-
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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.
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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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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
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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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Mon Mar 30 12:12:25 2020, ruijiu, General, Instruction of NTCAP for shift person
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To start a new run with NTCap, we need to retart NTCAP.
1. Stop labview program.
2. Start labview program and start a new run. |
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Mon Mar 30 13:40:57 2020, ruijiu, Detectors, HV of Inner detector
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Mon Mar 30 13:41:20 2020, ruijiu, Detectors, HV of Inner detector
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