| Status |
ExpNbr |
Date |
Author |
Type |
Category |
Target-Source |
Subject |
| Fixed | e755 |
Wed Jun 27 10:08:41 2018 |
gib | RUN | General | Cryo-empty | RUN 157 : empty target |
|
| Fixed | e755 |
Wed Jun 27 10:15:36 2018 |
takeshi | RUN | General | Cryo-LH2 | run summary for 38Ca + liq. H2 |
Here is the summary of the measurement of 38Ca + liq H2 setting.
We obtain 49.45-hour data acquisition time, which contains 1.4 * 10^6 CATS DIV triggered event.
The CATS DIV factor is 30000 for each CATS, so we can estimate the "gated beam rate", the beam rate including dead time of the DAQ, was 1.2 * 10^5 cps.
This value implies the dead time of the data acquisition is almost 50%, since the physical count rate of CATS was about 2.5 * 10^5 cps during the run.
Similarly, we totally obtained 2.2 * 10^10 counts of "gated beam". This value would help to compare with and estimate the statistics of the 36Ca setting.
See google spreadsheet for detail.
https://docs.google.com/spreadsheets/d/1yErcQcrXPdJjEOfUd9D9KPWWkWQpw5kX4wFze6vwij4/edit#gid=0 |
| Fixed | e755 |
Wed Jun 27 11:38:09 2018 |
gib | OTHER | General | Cryo-empty | end of empty run. Now tuning for 36Ca |
|
| Fixed | e755 |
Wed Jun 27 16:03:26 2018 |
Valerian | OFFLINE | General | Cryo-LH2 | Status on 38Ca pt |
|
| Ongoing | e738 |
Wed Jun 27 17:42:14 2018 |
daisuke | OTHER | General | N/A | Toward E738 |
|
| Fixed | e755 |
Wed Jun 27 17:46:55 2018 |
e755 Daisuke, Olivier, Nori, Valérie | RUN | General | Cryo-empty | Run 158 Beam tuning for 36Ca |
At 17h20 the beam was back in D6, ready for tuning by the LISE team, Christelle, Jean-Charles and Omar.
Run 158 start @ 18h06 stop@18h22
e748 Exxx 83258011 27 juin 18:22 /data/e748X/e755/acquisition/run/run_0158.dat.27-06-18_18h06m30s
at the beginning of the run, Wien filter was at 2kV. Then at 1 kV (at 18h10) to recenter beam trajectories in Y.
See plot Run158TrajectoriesWien1kV.png
wien filter at +5kV: Run158_trajectoriesWien5kV.png ; same with larger scale Run158_trajectoriesWien5kVok.png |
| Fixed | e755 |
Wed Jun 27 18:34:31 2018 |
NPTeam | OFFLINE | General | Cryo-LH2 | Update on the offline Analysis for 38Ca pt run 128-156 |
|
| Fixed | e755 |
Wed Jun 27 18:42:09 2018 |
e755 Daisuke, Olivier, Valérie | RUN | General | Cryo-empty | RUN 159 New input in GMT trigger +scalers |
Change of the GMT Trigger:
New entry IN12 corresponding to the CATS2 with no division.
This input is taken from the output of the bidiv of CATS1 "N" (duplicating the entry CATS2)
U2M channel 13 output "N-N/D" of the bidiv CATS1
U2M channel 14 output "N-N/D" of the bidiv CATS2
RUN 159 start @ 18h45; stop@ 19h10
e748 Exxx 920487017 27 juin 19:10 /data/e748X/e755/acquisition/run/run_0159.dat.27-06-18_18h45m15s
------
During the run at 18h58 FH31 slits were changed from +/-10 mm to +/-18 mm.
At 19h02 Omar changed the Wien conditions: +/-100kV; 74kV. see plots Run159ICDEtacatsHf_Wien100kV74kV.png
Last plot of trajectories in these conditions: Run159Trajectories_Wien100kV74kV.png |
| Fixed | e755 |
Wed Jun 27 19:26:13 2018 |
e755 Daisuke, Olivier, Pierre, Valérie | RUN | General | Cryo-empty | Run 160 -36Ca |
TAC Cats2 HF delay of 30 ns is removed
Run 160 start@ 19h13 stop@ 19h23
e748 Exxx 409258163 27 juin 19:23 /data/e748X/e755/acquisition/run/run_0160.dat.27-06-18_19h13m05s
LISE team: Omar K, Jean-Charles T. |
| Fixed | e755 |
Wed Jun 27 19:27:52 2018 |
e755 Daisuke, Olivier, Valérie | RUN | General | Cryo-empty | Run 161 -36Ca |
Run 161 start @ 19h25 stop@20h30
e748 Exxx 2411656699 27 juin 20:30 /data/e748X/e755/acquisition/run/run_0161.dat.27-06-18_19h25m55s
LISE team: Omar K, Jean-Charles T.
no Wien filter
SLITS FH31 +/- 8mm |
| Fixed | e755 |
Wed Jun 27 20:39:44 2018 |
e755 Daisuke, Olivier, Valérie | RUN | General | Cryo-empty | Run 162-38Ca |
TUNING OF 38Ca to be ready during the night, after the change of CO source at the machine between 21h ans 2am (maybe).
LISE team: Omar K, Jean-Charles T.
Tuning made for 38Ca
Run 162 start @ 20h32 stop@ 20h49
e748 Exxx 145558571 27 juin 20:49 /data/e748X/e755/acquisition/run/run_0162.dat.27-06-18_20h31m53s
Run162_ICDE1TcatsHF.png |
| Fixed | e755 |
Wed Jun 27 21:13:40 2018 |
e755 Daisuke, Olivier, edited by Valérie | RUN | General | Cryo-empty | Conditions for the night runs |
TUNING OF 38Ca to be ready during the night, after the change of CO source at the machine between 21h and 2am (maybe).
LISE team: Omar K, Jean-Charles T. Tuning made for 38Ca at 21h for Run 162.
NB the GECO ionization configuration is ok.
Phone call by Antoine at 20h40. he asked to check that there is external trigger to run later at 10**5/s see snapshot GECOIonizationTrigger.png ok.
NB: At 21h05 Daisuke puts back the 30ns delay on the time for the TAC Tcats1 HF, to be ready for the running conditions of 38ca during the night/morning data taking. |
| Fixed | e755 |
Wed Jun 27 21:25:41 2018 |
takeshi, shunpei | TARGET | Hardware | Cryo-LH2 | temperature log during liquefying |
Here is the temperature log before and during liquefying.
The temperature trend seems almost same as previous. |
| Fixed | e755 |
Wed Jun 27 22:11:20 2018 |
Pierre Louis | OFFLINE | General | Cryo-LH2 | Offline analysis of 38Ca(p,d)37Ca |
Here are some plot summarizing the analysis status on the 38Ca(p,d) channel.
Run concerned: 128-156 (from 25/06 @ 17h11 to 27/06 @ 7h03)
Running time: 33 hours
Gates applied:
- Target Impact (from CATS)
- Deuton in dE-E
- Incoming 38Ca, TCATS2_HF in [200;1000]
- Outgoing (Z=20)Ca, dE-E (IC-PL)
We analysed statistics in the Ground States of 38Ca(p,d) and compared to statistics of the 38Ca(p,t) channel telescope by telescope
38Ca(p,t)36Ca:
T1: mean = -0.84
sigma = 0.608
Count number = 302
T2: mean = -1.06
sigma = 0.76
Count number = 238
T3: mean = -1.70
sigma = 0.77
Count number = 342
T4: mean = -1.57
sigma = 1.21
Count number = 271
TOTAL_t_GS = 1153
38Ca(p,d)37Ca:
T1: mean = 0.71
sigma = 0.73
Count number = 2868
T2: mean = 0.18
sigma = 0.66
Count number = 1828
T3: mean = 0.23
sigma = 0.81
Count number = 3536
T4: mean = 0.127
sigma = 0.88
Count number = 3240
TOTAL_d_GS = 11472
Remarks:
- see 10 times more statistics in the ground states of 37Ca than in 36Ca
- resolution of the t channel is 80% of the resolution of the d channel
- excited states in (p,d) channel are more populated than the ground state
|
| Fixed | e755 |
Thu Jun 28 00:59:55 2018 |
e755 Daisuke, Olivier, Pierre, Marlène, Valérie (: edit) | RUN | General | Cryo-empty | Run 162-38Ca |
38Ca Beam at ~ 2. 10**5 pps
F62 +/- 11 mm
SLITS FH31 +/-5mm (moment)
Run 164 start @ 0h55 stop@ |
| Fixed | e755 |
Thu Jun 28 01:22:43 2018 |
Nori | BEAM | General | N/A | Brho2 scan for 36Ca |
We scanned Brho2 values so that the yield for 36Ca is maximized (LISE run0282-0284, F31 = +/-6 mm).
Attachment 1:
Yields of 32S, 30P, 29Si (strong contaminants) and 36Ca as a function of the Brho2 value.
We can see that different contaminants dominate if the Brho2 setting is changed. The shaded region corresponds to the momentum spread
determined by the slit F43 (0.25%, shown only for DeltaBrho2 = 0%). The 36Ca yields are too small to see.
Attachment 2:
36Ca yields that cannot be seen in the previous figure.
Attachment 3:
Fitting of 36Ca yields assuming that the distribution is a Gaussian. |
| Fixed | e755 |
Thu Jun 28 01:26:34 2018 |
daisuke | TARGET | Hardware | Cryo-LH2 | Liquid hydrogen target logger |
|
| Fixed | e755 |
Thu Jun 28 01:39:58 2018 |
Nori | BEAM | General | N/A | Discussion for 37Ca |
Offline analysis of LISE run0281. F31 = +/-0.6 mm, without wedge.
The number of counts of 37Ca was 900/50 = 18 times larger than 36Ca.
Comparing this result with a LISE++ simulation, if the Brho setting is optimized for 37Ca,
we expect to gain 12 x 4 = 48 times higher beam intensity.
Considering that the EPAX parametrization tends to over predict production cross-sections of neutron-deficient
exotic nuclei, the prediction for the 37Ca yield would be more reliable than 36Ca.
A rough estimate of the beam intensity is shown below.
36Ca 1.5 pps (100 nA, +/-6 mm) -> 37Ca 100 pps (100 nA, +/-6 mm) -> 37Ca 16 kpps (4 uA, +/-24 mm) |
| Fixed | e755 |
Thu Jun 28 08:20:54 2018 |
e755 | RUN | General | Cryo-LH2 | Summary Run 165-169 |
Run 165- start: 2h12
- start: 3h11
- CATS2 tripped at the end of run
Run 166- start: 3h11
- start: 4h26
- Observed T_CATS2_HF shift
Run 167- start: 4h25
- start: 5h22
- beam intensity fluctuations
Run 168
Run 169- start: 6h56
- start: 8h06
- Very strong drift of T_CATS_HF signals (see attached plot) and even total disappearance. Call the PCP but they said there is no issue on their side. Stopped the run. 5 min Later, all HF related signals are back.....
|
| Fixed | e755 |
Thu Jun 28 08:29:08 2018 |
Louis | CATS | General | Cryo-LH2 | CATS-HF time shift during the night |
noticed that the time between CATS and HF shifted during the night.
run 164 to 169 |