 Sat Mar 28 01:14:19 2020, Ragan, General, Cross-section for capture and ionisation of 206Pb81+ with H2 target 
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Cross-section for capture and ionisation of 206Pb81+ with H2 gas jet target are calculated using GLOBAL code.
The ionisation (on CsISiPHOS) and capture (on MWPC) trigger rates are calculated for 206Pb81+ beam with 10^6 particles revolving in ESR ~2 MHz frequency with H2 gas jet target density ~ 10^14 particles/cm3. |
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Sat Mar 28 04:32:15 2020, Ragan, Detectors, Ionisation events on DSSSD
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XY co-relation of DSSSD showing 206Pb82+ beam hitting the CsISiPHOS detector present in the inner pocket of ESR after the first dipole after the gas jet. 206Pb82+ is
produced by ionisation of
206Pb81+ due to interaction of beam with the gas jet. |
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Sat Mar 28 04:50:34 2020, Ragan, Detectors, MWPC
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Alex and Pierre-Michel applied 1500 V to the anode and adjusted the threshold in Messhute.
x1 signal was small & noisy and rest of the signals were fine. |
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Sat Mar 28 13:19:56 2020, Ragan, Runs, Template
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beam:
energy:
storage time:
purpose: data with TARGET ON
Detector position (CsISiPHOS): mm
Detector position (MWPC): mm
run start at xx:xx , first file: run0xxx.lmd
run stop at xx:xx , last file: run0xxx.lmd
_______________________________________________________________________________
time:
I_cooler = mA
HV1
CH1 voltage: 60V
CH1 leakage current: uA
CH2 voltage: 60V
CH2 leakage current: uA
CH3 voltage: 60V
CH3 leakage current: uA
CH4 voltage: 60V
CH4 leakage current: uA
HV2
CH1 voltage: 60V
CH1 leakage current: uA
CH2 voltage: 60V
CH2 leakage current: uA
CH3 voltage: -50V
CH3 leakage current: uA
CH4 voltage: -160V
CH4 leakage current: uA
SIS particles before:
ESR particles after stacking:
Number of stackings:
Target ON density:
Target on time for measurement:
NTCAp file:
IQ_2020-03-27_21-02-31/0000xxx.iq.tdms
SC_2020-03-27_21-02-31/0000xxx.iq.tdms
copy and repeat the above (below the line) every 30 minutes |
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Sun Mar 29 11:12:00 2020, Ragan, Runs, start run e121_run_0239.lmd
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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 ! |
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Sun Mar 29 20:32:20 2020, Ragan, General, Template for Pb halflive measurement
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beam:
energy:
purpose: data with electron cooler current xx mA
Detector position (CsISiPHOS): mm
Detector position (MWPC): mm
run start at xx:xx , first file: run0xxx.lmd
run stop at xx:xx , last file: run0xxx.lmd
_______________________________________________________________________________
time:
I_cooler = mA
HV1
CH1 voltage: V
CH1 leakage current: uA
CH2 voltage: V
CH2 leakage current: uA
CH3 voltage: V
CH3 leakage current: uA
CH4 voltage: V
CH4 leakage current: uA
HV2
CH1 voltage: V
CH1 leakage current: uA
CH2 voltage: V
CH2 leakage current: uA
CH3 voltage: V
CH3 leakage current: uA
CH4 voltage: V
CH4 leakage current: uA
SIS particles before:
ESR particles at injection:
ESR particles after stacking:
Target ON density:
NTCAp file:
IQ_2020-03-27_21-02-31/0000xxx.iq.tdms
SC_2020-03-27_21-02-31/0000xxx.iq.tdms
copy and repeat the above (below the line) every 30 minutes |
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Sun Mar 29 21:34:46 2020, Ragan, Runs, First run
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beam: 206Pb81+
energy: 400 MeV/u
purpose: data with primary beam for detector efficiency and cross-section calculations
Detector position (CsISiPHOS): 60 mm
Detector position (MWPC): -10 mm
run start at 21:25 , run file: run0250.lmd
run stop at 21:31 , close file: run0250.lmd
_______________________________________________________________________________
time: 21:25
I_cooler = 177 mA
SIS particles before: 2E8
ESR particles when gas jet is on: 3.6E6
Target ON density: 4.34E12
NTCAp file:
SC_2020-03-29_21-27-57
IQ_2020-03-29_21-27-57
copy and repeat the above (below the line) every 30 minutes |
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Sun Mar 29 21:55:47 2020, Ragan, General, MWPC
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Alex goes to Messhute to check the signals from MPWC. After he completes, we start with the measurements with the primary beam ) |
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Mon Mar 30 00:32:32 2020, Ragan, Runs, First measurement with 206Pb81+ beam
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beam: 206Pb81+
energy: 400 MeV/u
purpose: data with primary beam for detector efficiency and cross-section calculations
Detector position (CsISiPHOS): 60 mm
Detector position (MWPC): -10 mm
run start at 00:28 , run file: run0252.lmd
run stop at xx:xx , close file: run0.lmd
_______________________________________________________________________________
time: 00:28
I_cooler = 176 mA
SIS particles before: 3E8
ESR particles when gas jet is on: 2.4E6
Target ON density: 4.45E12
Target on time : 5 minutes
NTCAp file:
SC_2020-03-30_00_28_45
IQ_2020-03-30_00_28_45
(saved in drive: p)
copy and repeat the above (below the line) every 30 minutes |
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Mon Mar 30 01:01:53 2020, Ragan, Runs, First measurement with 206Pb81+ beam
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beam: 206Pb81+
energy: 400 MeV/u
purpose: data with primary beam for detector efficiency and cross-section calculations
Detector position (CsISiPHOS): 60 mm
Detector position (MWPC): -10 mm
run start at 00:28 , run file: run0252.lmd
file currently running: run0257.lmd
_______________________________________________________________________________
time: 01:00
I_cooler = 176 mA
SIS particles before: 3.3E8
ESR particles when gas jet is on: 2.4E6
Target ON density: 4.49E12
Target on time : 5 minutes
NTCAp file:
SC_2020-03-30_00_28_45 (run ongoing)
IQ_2020-03-30_00_28_45 (run ongoing)
(saved in drive: p)
copy and repeat the above (below the line) every 30 minutes |
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Mon Mar 30 01:07:29 2020, Ragan, General, Problem with SIS runstop: 0256
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There is problem with SIS
Run stop: 0257.lmd (at1:06) |
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Mon Mar 30 01:25:57 2020, Ragan, Runs, First measurement with 206Pb81+ beam
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01:17 Problem with SIS is solved
01:19 run start 0258.lmd
beam: 206Pb81+
energy: 400 MeV/u
purpose: data with primary beam for detector efficiency and cross-section calculations
Detector position (CsISiPHOS): 60 mm
Detector position (MWPC): -10 mm
run start at 01:19 , run file: run0258.lmd
file currently running:
_______________________________________________________________________________
time: 01:19
I_cooler = 176 mA
SIS particles before: 1.5E8
ESR particles when gas jet is on: 2.8E6
Target ON density: 4.49E12
Target on time : 5 minutes
NTCAp file:
SC_2020-03-30_01-18-31
IQ_2020-03-30_00_22-52
(saved in drive: p)
copy and repeat the above (below the line) every 30 minutes |
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Mon Mar 30 01:43:58 2020, Ragan, General, First measurement with 206Pb81+ beam pattern details
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The following shows the pattern for first measurement in ESR (gas jet is on for = 60*5 secs = 300 secs as it can be seen on step SC7 in pattern).
One injection cycle runs for ~ 6 mins. |
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Mon Mar 30 02:00:46 2020, Ragan, Runs, First measurement with 206Pb81+ beam
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beam: 206Pb81+
energy: 400 MeV/u
purpose: data with primary beam for detector efficiency and cross-section calculations
Detector position (CsISiPHOS): 60 mm
Detector position (MWPC): -10 mm
run start at 01:19 , run file: run0258.lmd
run stop at 02:05: stop file: 0265.lmd
_______________________________________________________________________________
time: 02:05
I_cooler = 176 mA
SIS particles before: 3.3E8
ESR particles when gas jet is on: 4E6
Target ON density: 4.53E12
Target on time : 5 minutes
NTCAp file:
SC_2020-03-30_01-18-31
IQ_2020-03-30_00_22-52
(saved in drive: p)
copy and repeat the above (below the line) every 30 minutes |
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Mon Mar 30 02:27:44 2020, Ragan, Runs, Second measurement with 206Pb81+ beam at I_cooler = 200 mA
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I_cooler = 200 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 02:24 , run file: run0267.lmd (0266.lmd is garbage file)
run stop at :
_______________________________________________________________________________
time: 02:24
I_cooler = 176 mA
SIS particles before: 2.5E8
ESR particles: 4.9E6
NTCAp file:
SC_2020-03-30_02-27-10
IQ_2020-03-30_02-27-10
(saved in drive: p)
copy and repeat the above (below the line) every 30 minutes |
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Mon Mar 30 04:15:29 2020, Ragan, General, Second measurement with 206Pb81+ beam at I_cooler = 200 mA
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In the picture below, a very nice storage of 206Pb81+ at 200 mA electron cooler current for no gas jet target can be seen in ESR. The measurement started at 02:24 and we will now finish it in 5-10 mins. We will now do two more measurements for I_cooler = 10 mA ans 20 mA. |
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Mon Mar 30 06:15:13 2020, Ragan, Runs, Second measurement with 206Pb81+ beam at I_cooler = 20 mA
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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)
run stop at :
_______________________________________________________________________________
time: 06:08
I_cooler = -1 mA
SIS particles before: 2.5E8
ESR particles: 3.01E6
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 |
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Mon Mar 30 06:30:52 2020, Ragan, Runs, Second measurement with 206Pb81+ beam at I_cooler = 20 mA
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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: 06:30
I_cooler = -1 mA
ESR particles: 2.6E5
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 |
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Mon Mar 30 06:34:47 2020, Ragan, General, Second measurement with 206Pb81+ beam at I_cooler = 20 mA
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In the ESR picture below, the decay of beam is very fast initially for few minutes and then the decay is constant. But why does it decay for first few minutes ? |
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Mon Mar 30 20:51:06 2020, Ragan, Detectors, Bias Voltage for Si-pads
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The limit of the leakage current for all Si pads was increased from 1500 nA to 5000nA and
leakage current was recorded for different Bias Voltages (32V, 35V, 40V, 45V, 50V, 55V
and 60V).
Since, I_leakage remains < 3 uA for 60 V, it is decided to increase the Bias Voltage for
all the Si-pads from 32 V to 60 V.
For DSSD and CsI, bias voltages remains same (-50V and -160V respectively). |