Fixed, e738, Tue Jul 10 05:23:19 2018, Shumpei, OFFLINE, General, Cryo-LH2, Analysis for 9C beam setting 
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Used data: run0312 (about 80 minutes data taking).
Analysis for (p,d) channel and invariant mass
CATS1_HF TOF information for beam PID
Wait for more statistics for (p,t) channel |
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Fixed, e738, Tue Jul 10 05:25:42 2018, Shumpei, BEAM, General, Cryo-LH2, triton contamination in the 9C beam setting
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In MUST2 dE-E plot, strong locus for triton E ~ 40 MeV exists.
Kinematics for triton bellow 45 MeV matches the kinematics of triton 40MeV beam proton elastic scattering.
If coincidence of proton required, still exists for some region (proton forward scattering with enough energy to pass through DSSD).
Kinematics for proton matches the kinematics of recoil proton by 40MeV triton beam.
Sum of the proton and triton energy has a peak around 40 MeV.
Locus still exists with TOF gate by CATS1-HF.
Triton energy for (p,t) reaction will be higher than ~ 50 MeV, so can't be a background.
The total number of triton bellow 45 MeV and above DSSD range in run0312 (80 minutes) is ~ 20000 (~ 4 cps for all the telescope). |
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Fixed, e738, Tue Jul 10 07:16:16 2018, Shumpei, Valérie, RUN, General, Cryo-LH2, RUN 326 9x
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Run 326 start: 6h59
Beam: 9C
All Triggers: T1 to T8, CATS1% CATS2% PLASTIC%
Divisions: CATS1, CATS2 3. 10**4 ; Plastic% 10**4
Dead time between 8 and 15%
CATS2 X19 strip not running since Run 322
Total beam I 1.3 to 1.5 10**5 pps in CATS1, CATS2.
CATS2 700V 0.14 ľA.
I ~ 1.8uA to 2.0 ľA primary beam
We asked PCP to reduce to 1.7 ľA in order to avoid CATS1 tripping.
But CATS1 is continuously tripping even when we decrease the HV from 670 V to 660V then to 650V.
2 minutes ok see scalers at 7h18.
At 7h20 we try CATS1 HV 640V. Tripping.
At 8h02 we try again to put ON HV on CATS1. 640V ok, with I ~ 0.04 ľA (low value) for beam around 10**5 on CATS2.
It is running... (see un326_BeamTracksAt8h09.png )
With low efficiency, but at least we can check the beam trajectories. See Run326_BeamTracksAt8h09.png
Trip at 8h13. |
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Fixed, e738, Tue Jul 10 12:51:37 2018, marlčne, olivier, J-C, daisuke, RUN, General, Cryo-LH2, RUN 330 28x
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9C + liquid H. Data taking after replacing CATS1.
12h03 started
13h54 stop |
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Fixed, e738, Tue Jul 10 13:59:09 2018, jacques, daisuke, freddy, RUN, General, Cryo-LH2, RUN 331 6x
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9C + liquid H
13h56 start. 12C 1.7 electric micro A.
16h51 stop |
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Fixed, e738, Tue Jul 10 14:22:22 2018, Nori, BEAM, General, Cryo-LH2, Beam image on target
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Reconstructed beam images from run0330. |
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Fixed, e738, Mon Jul 9 23:29:18 2018, Nori, CATS, General, Cryo-LH2, CATS tracking efficiency
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Analyzed run 312 (9C physics run). CATS calibration files with lowered threshold values
(/home/e748/analysis/nptool/Projects/e755/Calibration/cats/CATS1_X.e738.npt, etc.) were used.
Using the total E information from the plastic, tracking efficiencies for each beam species were estimated.
Two different position reconstruction methods (ASECH and CENTROIDE) were also compared.
(ASECH)
9C 94% (see Attachment 2)
8B 86%
7Be 80%
6Li 68%
(CENTROIDE)
9C 98%
8B 91%
7Be 84%
6Li 75% |
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Fixed, e738, Tue Jul 10 15:17:21 2018, Nori, CATS, General, Cryo-LH2, CATS tracking efficiency
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Tracking efficiencies deduced from run 330 (after replacing CATS1).
9C 89% (see Attachment 1)
8B 88%
7Be 80%
6Li 65% |
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Fixed, e738, Tue Jul 10 16:28:53 2018, daisuke, OTHER, Social, N/A, 6Li(p,d)5Li
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The peak near 16 MeV was observed in a measurement in the 1960s. The resonance is close to the 3He-d threshold. The narrow width indicates a binary cluster of 3He and d formed in 5Li.
May be interesting to see if the same phenomenon is observed for 6Be. |
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Fixed, e738, Tue Jul 10 17:02:02 2018, jacques, daisuke, freddy, louis, RUN, General, Cryo-LH2, RUN 332
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12C primary: 1.7 uA
start: 16h52
stop: 17h52
Beam stop due to CSS2 power supply failure |
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Fixed, e738, Tue Jul 10 18:23:01 2018, daisuke, OTHER, Social, N/A, mirror reaction of 7Be(p,d)6Be
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Fixed, e738, Tue Jul 10 21:26:48 2018, didier, daisuke, RUN, General, Cryo-LH2, RUN 334 17x
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9C + liquid H. Probably nobody cares this post right now, but the beam is back.
21h00 the beam back to LISE.
21h03 start. Tune the wien filter 3.0 to 0.0 kV to optimize the transmission from CATS to PLASTIC (with visual scaler). TOF spectrum is the same as before.
21h32 1.7 electric micro A.
22h20 Wien filter 0 to 1.0 kV. Scaler Plastic/CATS2 ratio is the highest (93%) with this setting.
23h11 stop |
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Fixed, e738, Tue Jul 10 23:14:31 2018, DD, RUN, General, Cryo-LH2, RUN 335
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9C + Liquid H run.
23h11 start. 1.7 electric micro A. Wien filter 1 kV.
01h06 stop. |
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Fixed, e738, Wed Jul 11 02:52:54 2018, Marlene, RUN, General, Cryo-LH2, RUN336 6x
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run336 start 1:07 / stop 2:48
fluctuations of beam intensity |
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Fixed, e738, Wed Jul 11 02:55:44 2018, e748, RUN, General, Cryo-LH2, RUN 337
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RUN 337 start 2:49 /stop 4:09
Beam intensity CATS 200k pps |
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Ongoing, e738, Wed Jul 11 03:57:50 2018, e748, OFFLINE, General, Cryo-LH2, Conversion problem
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Conversion of runs 335 gives the following error (attached)
Size of raw file =3.5 Go
Size of root file = 1.5Go |
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Fixed, e738, Wed Jul 11 04:16:04 2018, Nori, BEAM, General, Cryo-LH2, Caviar status
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Caviar is now operating at 700 V. TOF-CaviarX position correlations are clearly seen (Attachment 1).
Position efficiencies for each beam species were estimated by applying plastic Q gates on wire multiplicity
distributions (Attachment 2).
9C 98%
8B 96%
7Be 91%
6Li 84% |
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Fixed, e738, Wed Jul 11 05:11:19 2018, e748, RUN, General, Cryo-LH2, RUN 338
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RUN 338
9C beam 200 k pps
start 4:09 /stop 5:10 |
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Fixed, e738, Wed Jul 11 06:11:50 2018, e748, RUN, General, Cryo-LH2, RUN 339 9x
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RUN 339
9C 210 k pps
start 5:11 / stop 6:08 (beam stopped) |
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Fixed, e738, Wed Jul 11 06:17:19 2018, e748, RUN, General, Cryo-LH2, RUn 340
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RUn 340
start 6:10 / stop 7:43
CATS2 has tripped |
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Pending, e738, Wed Jul 11 06:29:00 2018, e748, CATS, General, Cryo-LH2, CATS2 status
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CATS2 current fluctuates a lot and has increased up to 0.26uA in run 340
In run 340 I observe that a second wire is missing, which is new (see attached file for run 339 and run 440) |
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