| Status |
ExpNbr |
Date |
Author |
Type |
Category |
Target-Source |
Subject |
| Fixed | e738 |
Mon Jul 9 20:33:00 2018 |
Daisuke Louis Valérie | RUN | General | Cryo-LH2 | RUN 321- ok again ! |
Run 321 start 20:09
Total beam on CATS ~ 1.7 10**5 /s
Beam of 9C, 7Be, 8B and 6Li
All triggers
CATS1: 670V I ~0.22 ľA; CATS2: 700V I ~ 0.18ľA
We can see spots of tritons in the plots EDE of MUST2 see the plot Run321pidEDEcsIMM1to6zoomPDT.png. |
| Fixed | e738 |
Mon Jul 9 22:15:04 2018 |
DIdier Daisuke Nori Louis Valérie | RUN | General | Cryo-LH2 | RUN 322, strip CATS2 X 19 off |
Run 322 start: 22h00 stop: 0h21
e748 Exxx 3,7G 10 juil. 00:21 run_0322.dat.09-07-18_21h58m34s
Beam: 9C
target: filled
Trigger: T1 to T8, CATS1% CATS2% PLASTIC%
I=1.6*10⁵pps in CATS1
I=1.8uA primary beam
Purity = 5.2% from T_CATS_HF
From this run, new missing strip in CATS2 X 19
NB: Buffer size for the numexo data was changed after run314. Since then the runs are not correctly converted (smaller size of the root files than before, nearly factor 10.
No (complete) offline run conversion since run 321. |
| Ongoing | e738 |
Mon Jul 9 23:21:55 2018 |
takeshi | TARGET | Hardware | Cryo-LH2 | temperature log of the target |
Here are the temperature logs of the liquid H2 target up to now.
I would share the log during the regeneration. |
| Fixed | e738 |
Mon Jul 9 23:25:10 2018 |
takeshi | RUN | General | Cryo-LH2 | run summary for 10C beam |
With 10C beam, we have obtained
31.7 hours of liq. H2 target and
1.2 hours of empty target.
see online run summary for detail.
https://docs.google.com/spreadsheets/d/1yErcQcrXPdJjEOfUd9D9KPWWkWQpw5kX4wFze6vwij4/edit#gid=805236919 |
| Fixed | e738 |
Mon Jul 9 23:29:18 2018 |
Nori | CATS | General | Cryo-LH2 | CATS tracking efficiency |
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% |
| Fixed | e738 |
Tue Jul 10 00:46:26 2018 |
Shumpei, Valérie | RUN | General | Cryo-LH2 | RUN 323 + Brho line settings |
Run 323 start: 0h20 stop: 2h45
e748 Exxx 3,5G 10 juil. 02:45 run_0323.dat.10-07-18_00h20m04s
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 from 1.2 to 1.4*10**5 pps in CATS1, CATS2
I=1.8uA primary beam
Purity = 5.1% of 9C from T_CATS1_HF
Integral 4 peaks NP_T_CATS1_HF = 7341 [channels 10 to 8000];
peak of 8B [channels 10 to 2000]; integ=609 --> 8.3 %
peak 9C [ch. 2600 to 4200]:376 --> 5.1% ;
7Be[channels 4200 to 6300], integ= 4535 --> 61.7%
peak of 6Li [channels 6300 to 8000]: 1834 --> 24.9%
CATS1 670V 0.14 ľA (sparkles at 0.5 ľA)
CATS2 700V 0.12 ľA
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
Primary beam 12C 75 MeV/u 1.5 ľA ==> 1.4 10**5 pps on CATS
Brho1(RMN) = 1.7301 T.m ; I _D3P1 = 305.3 A
Brho2(RMN) = 1.6352 T.m ; I _D3P1 = 375.3 A
--> Energy (9C) = 55.3 MeV/u
Brho_DA1(RMN) = 1.6301 T.m ; I _DAP = 164 A
Brho_DA2(RMN) = 1.6555 T.m ; I _DAC2 = 3 A
Wien Filter 0/0 kV
SLITS.
FH31 = +/-20mm;
FH42 = +/-10 ; FV43 = +/-10.4 ; FH51 = +/-30 ;
FH61 = +/-30 ; FV61 = +/-25.5 ; FH62 = +/-15 mm; FV62 = +/-20
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = |
| Fixed | e738 |
Tue Jul 10 01:26:21 2018 |
Shumpei | OFFLINE | General | Cryo-LH2 | Analysis for 10C(p,d)9C and 10C(p,t)8C updated |
Used data run run0284-0302 (almost all for 10C beam)
CsI calibration parameters are the same as E755 exp (deuteron optimized),
10C(p,d)9C
Gate:
1. beam position on the target by CATS1&2
2. deuteron gate by dE-E MUST2 T1-T4
Offset of the position of MUST2 T1-T4 was determined by 10C beam direct hit component. Target Z position (beam direction) is shifted 12 mm to match kinematics of 9C g.s.
Ground state of 9C and first excited state of 9C (2.2 MeV) are clear. Higher excited state around 6 MeV.
Statistics for T2 is smaller because 2 CsI crystals are not working (known before E755 exp,).
10C(p,t)8C
Gate:
1. beam position on the target by CATS1&2
2. triton gate by dE-E MUST2 T1-T4
Same position offset of (p,d) is used.
Ground state of 8C is clear, but energy of each CsI crystal seems to be shifted. |
| Fixed | e738 |
Tue Jul 10 02:47:10 2018 |
Shumpei, Valérie | RUN | General | Cryo-LH2 | RUN 324 |
Run 324 start: 2h45 stop 5h10
e748 Exxx 3,8G 10 juil. 05:10 run_0324.dat.10-07-18_02h44m52s
Beam: 9C
All Triggers: T1 to T8, CATS1% CATS2% PLASTIC%
Divisions: CATS1, CATS2 3. 10**4 ; Plastic% 10**4
CATS2 X19 strip not running since Run 322
Total beam I 1.4*10**5 pps in CATS1, CATS2
I=1.8uA primary beam
Purity = 4.7% of 9C from T_CATS1_HF
Integral 4 peaks
peak of 8B [channels 10 to 2000]; 7Be[channels 4200 to 6300];
peak of 6Li [channels 6300 to 8000]:
total NP_T_CATS1_HF = 44060 [channels 10 to 8000];
peak 9C [ch. 2600 to 4200]:2060--> 4.7% ;
CATS1 670V 0.20ľA for beam at 1.4 10**5 pps
CATS2 700V 0.16 ľA
Dead time between 8 and 15% |
| Fixed | e738 |
Tue Jul 10 05:12:31 2018 |
Shumpei, Valérie | RUN | General | Cryo-LH2 | RUN 325 |
Run 325 start: 5h10 stop 6h53 due to CATS1 -->tripping
e748 Exxx 2,5G 10 juil. 06:53 run_0325.dat.10-07-18_05h09m53s
Beam: 9C
All Triggers: T1 to T8, CATS1% CATS2% PLASTIC%
Divisions: CATS1, CATS2 3. 10**4 ; Plastic% 10**4
CATS2 X19 strip not running since Run 322
Total beam I 1.3 to 1.4 10**5 pps in CATS1, CATS2
I ~ 1.8uA primary beam
Purity = 4.7 to 5% of 9C from T_CATS1_HF
I
CATS1 670V 0.20ľA for beam at 1.4 10**5 pps
CATS2 700V 0.16 ľA
Dead time between 8 and 15% |
| Fixed | e738 |
Tue Jul 10 05:23:19 2018 |
Shumpei | OFFLINE | General | Cryo-LH2 | Analysis for 9C beam setting |
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 |
| Fixed | e738 |
Tue Jul 10 05:25:42 2018 |
Shumpei | BEAM | General | Cryo-LH2 | triton contamination in the 9C beam setting |
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). |
| Fixed | e738 |
Tue Jul 10 07:16:16 2018 |
Shumpei, Valérie | RUN | General | Cryo-LH2 | RUN 326 |
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. |
| Fixed | e738 |
Tue Jul 10 12:51:37 2018 |
marlčne, olivier, J-C, daisuke | RUN | General | Cryo-LH2 | RUN 330 |
9C + liquid H. Data taking after replacing CATS1.
12h03 started
13h54 stop |
| Fixed | e738 |
Tue Jul 10 13:59:09 2018 |
jacques, daisuke, freddy | RUN | General | Cryo-LH2 | RUN 331 |
9C + liquid H
13h56 start. 12C 1.7 electric micro A.
16h51 stop |
| Fixed | e738 |
Tue Jul 10 14:22:22 2018 |
Nori | BEAM | General | Cryo-LH2 | Beam image on target |
Reconstructed beam images from run0330. |
| Fixed | e738 |
Tue Jul 10 15:17:21 2018 |
Nori | CATS | General | Cryo-LH2 | CATS tracking efficiency |
Tracking efficiencies deduced from run 330 (after replacing CATS1).
9C 89% (see Attachment 1)
8B 88%
7Be 80%
6Li 65% |
| Fixed | e738 |
Tue Jul 10 16:28:53 2018 |
daisuke | OTHER | Social | N/A | 6Li(p,d)5Li |
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. |
| Fixed | e738 |
Tue Jul 10 17:02:02 2018 |
jacques, daisuke, freddy, louis | RUN | General | Cryo-LH2 | RUN 332 |
12C primary: 1.7 uA
start: 16h52
stop: 17h52
Beam stop due to CSS2 power supply failure |
| Fixed | e738 |
Tue Jul 10 18:23:01 2018 |
daisuke | OTHER | Social | N/A | mirror reaction of 7Be(p,d)6Be |
|
| Fixed | e738 |
Tue Jul 10 21:26:48 2018 |
didier, daisuke | RUN | General | Cryo-LH2 | RUN 334 |
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 |