| Status |
ExpNbr |
Date |
Author |
Type |
Category |
Target-Source |
Subject |
| Fixed | e768s |
Mon Jul 29 01:27:59 2019 |
Jenn | BEAM | General | LiF | Beam intensity and profile check |
Run number 156: 15-O beam
beam intensity 8.8e6
OR Vamos ~ 106 |
| Fixed | e768s |
Mon Jul 22 04:15:53 2019 |
Faïrouz & Sylvain | RUN | General | LiF | Beam intensity & profile & scalers |
|
| Fixed | e786s |
Mon Jun 24 12:06:17 2019 |
mugast | OFFLINE | General | N/A | Beam energy loss |
Caculation with LISE++
Beam initial: 9.96 MeV/u
CATS 2 : 9.79
15 um ice water: 9.39
3.8 um Havar: 8.83
2.2 mm 3He (mid target): 8.24
2.2 mm 3He (full target): 7.61
3.8 um Havar : 6.99
15 um ice water: 6.50
with this we saw correctly both pp and pp' in MUST2: |
| Fixed | e793s |
Thu Mar 11 15:48:14 2021 |
mugast | OFFLINE | General | N/A | Beam energy and Beta |
Beam energy entering G1: 7.6922 MeV/u (Beta= 0.1277)
CATS2 thickness: 2.8 um of Mylar in total + about 4 cm of isobutane at 4 mbar
7.62783 / 7.61264 / 7.54789
Beam energy after CATS: 7.54789 MeV/u (Beta= 0.1265)
Beam at mid CD2 target : 7.45118 MeV/u (Beta= 0.1257)
Beam after target: 7.35381 MeV/u (Beta= 0.1249) |
| Fixed | e793s |
Tue Mar 16 08:39:46 2021 |
Sarah, Chloé, Ablaihan | BEAM | General | CD2 | Beam dropped due to electric defect. @ 08h40 back @ 8h45 |
|
| Fixed | e744s |
Sun Apr 14 23:23:51 2019 |
Giuseppe, Mariluz, Jenn, Serge, Nishu, Didier, Simon | BEAM | Hardware | CH2 | Beam down |
| Beam disappeared for five minutes (23:20-23:25) |
| Pending | e793s |
Wed Mar 10 20:36:19 2021 |
Nigel | BEAM | General | CD2 | Beam centering - MUST2 hit pattern |
We made a quick check of the beam centering by inspecting the MUST2 (forward angles) hit pattern (plot attached). It appears that the beam is probably somewhat off centre in the horizontal direction.
It has been decided to run overnight like this and then see with Bertrand if the centering can be improved (will need to send hit pattern spectrum to PCP in order for Bertam to do this).
 |
| Fixed | e768s |
Tue Jul 30 04:04:27 2019 |
Jenn & Franco | RUN | General | LiF | Beam back at 4.00 h |
We had the beam back at 4.00 a.m.
Beam profile and intensity checked: 1.2e7
OR VAMOS ~ 630
OR MUGAST ~ 170
OR AGATA ~ 35k
The AGATA rate is still very high. |
| Fixed | e768s |
Tue Jul 30 04:40:18 2019 |
Jenn & Franco & Teodora | RUN | General | LiF | Beam back at 4.00 h |
Due to the high rate of AGATA and Mugast (probably due to some implantation) we asked the PCP to readjust the beam.
They centered it a bit more on the profiler and now it looks better. Attached are the new rates.
OR VAMOS ~ 620
OR MUGAST ~ 170
OR AGATA ~ 7k
| Jenn & Franco wrote: | We had the beam back at 4.00 a.m.
Beam profile and intensity checked: 1.2e7
OR VAMOS ~ 630
OR MUGAST ~ 170
OR AGATA ~ 35k |
|
| Fixed | e744s |
Tue Apr 16 18:28:27 2019 |
Faïrouz & marlène | RUN | General | Carbon | Beam back at 18:28 |
Beam is back at 18h28
Intensity: 10e5 pps |
| Fixed | e793s |
Mon Mar 15 11:36:37 2021 |
Taras, cyril, Léo | ONLINE | General | CD2 | Beam back at 11h32 |
| Beam is back at 11h32 |
| Fixed | e786s |
Mon Jun 24 21:42:11 2019 |
mugast | RUN | General | Cryo-3He | Beam and cryo target |
The beam is fluctuating between 18 kHz and 22 kHz in VAMOS (24 to 27 kHz in CATS1)
Division on CATS1 trigger is 1000
Division on VAMOS trigger is 1000 in the GMT.
The target is stable with 6.00 K temperature, P=700mbar
We fill 4He every 5 to 5:30 hours and we use more or less 5.5 cm (i.e. 35l) for each filling.
The next bottle change is foreseen on wednesday morning.
We had 2 crashes of the target acquisition this afternoon. We think that it is due to the temperature. We added a fan and we slow down the reading of the temperature to every 12s (instead of 10s). |
| Fixed | e793s |
Fri Mar 12 19:15:19 2021 |
Charlie, Nigel (watched by Wilton) | RUN | General | CD2 | Beam alignment tuning |
During part of run #61, Nigel tuned the beam alignment (using the MUST2 hit pattern as the diagnostic). The beam had shifted after the restarting of the ISOL TIS. The beam came back at around 18:30 and tuning finished at 19:15.
** Disregard the data from this run between ~17:15 (beam lost) and 19:15 (tuning finished).
The run should be OK after 19:15.
** Don't tell Bertrand that Nigel used the d*p*le ... |
| Fixed | e768s |
Mon Jul 22 08:23:02 2019 |
Christian - Bertrand, Sylvain, Frank, Francois | BEAM | General | LiF | Beam adjustment notes |
| Adjustment of beam position, moved up by approximately 15mm on VAMOS FP, down by 2mm on target. AGATA rate reduced to normal, about 4k after 5 min equilibration, no substantial satellite seen in direct beam on VAMOS FP. See separate entry for detailed discussion. Note, however that while beam intensity measurement is 2.1e7, VAMOS trigger on reaction setting is approximately 1100. |
| Fixed | e744s |
Tue Apr 16 14:37:04 2019 |
Marion | BEAM | General | Carbon | Beam above 1.4*10**4 on cats asked to come down to ~1.1*10**5 |
|
| Fixed | e793s |
Fri Mar 12 18:42:51 2021 |
Sarah, Louis | BEAM | General | CD2 | Beam Back |
The beam is back at 18h40
The beam stopped due to source problems, going up steadily, currently at ~2e5 pps |
| Fixed | e768s |
Mon Jul 29 04:38:32 2019 |
Chloe & Teodora | RUN | General | LiF | Beam |
| Low beam intensity from 4h30 am. |
| Pending | |
Fri Jul 26 11:25:46 2019 |
UK refugees | OTHER | General | | Be positive and the experiment will work if we put lead in our pencil |
|
| Fixed | e768s |
Sat Jul 27 00:18:24 2019 |
Freddy, Sylvain | S1 | Hardware | N/A | Annular detector: Loss of channels |
| On the Annular |
| Fixed | e768s |
Sat Jul 27 01:50:28 2019 |
Freddy, Sylvain | S1 | General | N/A | Annular detector degradation |
By looking in details to the impact matrix of the annular detector, one can see that more segments than before are missing.
There was a clear degradation between run135 and run140.
HVmonitor summary of leakage current for MG11A:
*Wed Jul 24 21:44:44 2019 ---> 0.2 uA
*Thu Jul 25 06:53:15 2019 ---> 0.6 uA (run135 stop)
*Thu Jul 25 13:23:48 2019 ---> 1.4 uA (during run 140)
*Thu Jul 25 22:25:35 2019 ---> 1.3 uA
*Fri Jul 26 07:26:23 2019 ---> 1.9 uA
*Fri Jul 26 16:27:50 2019 ---> 1.9 uA
*Sat Jul 27 01:29:52 2019 ---> 1.9 uA
Attached is also the output of the HV monitor (~/HV_7.root) where the leakage current increase is visible. I just did not manage to draw it as a function of absolute time because the date stored in the file seems wrong. |