Fixed, e744s, Wed Apr 17 01:53:04 2019, mugast, ONLINE, General, CH2, Log and scalers RUN 136 @01:40 20x
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Fixed, e744s, Wed Apr 17 02:00:55 2019, mugast, BEAM, General, CH2, Beam lost
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| mugast wrote: |
| mugast wrote: | About 1:00am we lost the beam.
We call pcp and they will fix in 15 min
At 01:20 we recover the beam |
At 01:30 we lost other time the beam for 5 min |
At 02:00 again and we recovered soon. Seems unstable |
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Fixed, e744s, Wed Apr 17 03:03:15 2019, mugast, BEAM, General, CH2, No beam
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No beam since 02:30
HV of C0 tripping all the time, pcp call someone to fix it |
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Fixed, e744s, Wed Apr 17 04:06:28 2019, mugast, RUN, General, N/A, Run 136_1 CATS lost efficiency with respect to VAMOS
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Fixed, e744s, Wed Apr 17 05:14:15 2019, mugast, BEAM, General, CH2, No beam
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| mugast wrote: | No beam since 02:30
HV of C0 tripping all the time, pcp call someone to fix it |
We recover the beam at 05:05 with oscillations |
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Fixed, TEST, Tue May 28 11:08:10 2019, mugast, MUST2, Hardware, 3-alpha, MG3 is tripping
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| MG3T is tripping, tryied to set max current to 20uA but it still trip around 30V. |
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Fixed, e786s, Wed Jun 12 17:59:01 2019, mugast, OTHER, Software, , Online Energy Calibration
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| Updated Online Energy calibration for MUGAST, based on run_0231 data |
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Fixed, e786s, Wed Jun 12 18:11:04 2019, mugast, OTHER, Software, , Online Energy Calibration
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Fixed, e786s, Wed Jun 19 10:09:10 2019, mugast, MUST2, Hardware, N/A, Time calibrator cabled
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range 640 ns
period 20 ns |
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Fixed, e786s, Mon Jun 24 12:06:17 2019, mugast, OFFLINE, General, N/A, Beam energy loss
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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: |
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Fixed, e786s, Mon Jun 24 21:42:11 2019, mugast, RUN, General, Cryo-3He, Beam and cryo target
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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). |
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Fixed, e786s, Tue Jun 25 11:55:12 2019, mugast, OFFLINE, General, Cryo-3He, Here is the F***G gs
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We added the correct deformation of the target thickness, and corrected for it with the angle dependance.
15 um Water
Correct beam energy
Correct target position
Run 56 only |
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Fixed, e786s, Wed Jun 26 13:48:35 2019, mugast, OFFLINE, General, Cryo-3He, analysis
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Fixed, e786s, Thu Jun 27 00:26:37 2019, mugast, OFFLINE, General, , statistics until now
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Maybe some stat still to recover from better gate and mass and Z reconstruction.
Andrea |
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Fixed, e768s, Fri Jul 12 12:07:56 2019, mugast, OTHER, General, N/A, Masks for MUST2
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Masks for MUST2 are now mounted.
NOTE: one mask is not properly screwed (top left) and should be mounted again on Monday morning when we open.
Masks cover theta_lab < 38 deg, corresponding to < 30 pps of 15O for 15O+19F elastic channel assuming 2e7 pps of 15O and 1.25 mg/cm2 of LiF. |
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Fixed, , Tue Jul 16 18:51:06 2019, mugast, VAMOS, General, LiF, 15N beam optimisation
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Fixed, e768s, Tue Jul 16 19:21:19 2019, mugast, OTHER, General, , Qpole values
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Brho = 0.640 Tm
RMN = 3247,742 Gaus (215.630 A)
Q31 = 18.5 A
Q32 = 20.9 A
Q41 = 170.579 A
Q42 = 150.829 A |
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Fixed, e768s, Tue Jul 16 22:25:51 2019, mugast, OTHER, General, , Oxygen 15 decay scheme
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beta+ decay to the ground state of 15N
gammas @ 511 keV |
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Fixed, e768s, Wed Jul 17 01:08:03 2019, mugast, VAMOS, General, LiF, new beam settings
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The last values Q32=21.0, Q31=22.8
With these new optimzed values, we have:
Std dev-x=6.147
Std dev y=13.29
Beam intensity=10⁴ pps, no masque mobile |
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Fixed, e768s, Wed Jul 17 01:42:46 2019, mugast, VAMOS, General, LiF, Beam intensity versus Trigger Vamos
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Masque mobile at +7 mm
Beam: 10^5 pps, Fag:10, Trigger VAMOS:10
Beam: 8.10^5 pps, Fag:15, Trigger VAMOS:15
Beam: 10^7 pps, Fag:241, Trigger VAMOS:271 |
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