I_cooler = 20 mA beam: 206Pb81+ energy: 400 MeV/u purpose: data for the measurement of half life of 206Pb81+ due to its interaction with electron cooler and residual gas Detector position (CsISiPHOS): 60 mm Detector position (MWPC): -10 mm run start at 06:08 , run file: run0270.lmd (0268.lmd and 0269.lmd are garbage files) file running: 0270.lmd _______________________________________________________________________________ time: 07:00 I_cooler = -01 mA ESR particles: 2.2E5 NTCAp file: SC_2020-03-30_06-11-08 IQ_2020-03-30_06-11-16 (saved in drive: p) copy and repeat the above (below the line) every 30 minutes
1. slow control: 1.1. program file: litv-exp@ringpi:~/epics/mrcc_ioc/db $ 1.2 user interface: litv-exp@lxg1298:~/E121/scripts/GUIe121_new 2. mbs: 2.1 user interface litv-exp@lxg1298:~/E121/scripts$ ./e121_gui.py 2.2 source R4L-47 litv-exp > pwd /esr/usr/litv-exp/2020_e121/ 3. go4: litv-exp@lxg1298:~/2019Munich-Det/Go4-Muenchen-3V785AH-1V830-simple$ go4 4. experimenal data: litv-exp@lxg1298:/data.local1/E121
How to change scaling factor? The parameters is in f_user.c file: 1. open the f_user.C with emacs : R4L-47 litv-exp > emacs -nw f_user.c 2. change the parameters "MWPC_downscale". #define MWPC_downscale 0 // reduction = 2**MWPC_downscale 3.compile the program. 4. restart mbs.
Because the leakcurrent of 6 Sipads is over the setting limit, the alarm of HV module is sounding. Ruijiu increase the limit to 1500 uA.
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.
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.
go4 crush up. the problem is due to mbs. restart mbs. see an error. restart again. the mbs and go4 are working working.
MHV1 MHV2 ch1:1st Sipad 4th Sipad ch2:2nd Sipad 6th Sipad ch3:3rd Sipad DSSD ch4:4th Sipad CsI
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)
IQ_2020-03-29_13-05- 56 SC_2020-03-29_13-05- 56
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.
s6 positon at 50mm.
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
decay line of 205Tl beam with Ar gas jet target on and S6 slit at -8mm Ar gas density~1e12 atoms/cm2
Ionization cross section = 1320 barn. Capture cross section = 557+137+44.5=735.5. sigma_Ion/sigma_cap=1.79
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.