 Mon Feb 7 08:09:50 2022, OH, CB and PH, CARME Server setup and initial tests
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09:09 Arrived at GSI for comissioning beamtime.
CARME currently in a stopped state, with all FEEs powered off.
Upper detector is biased with 80V and has a leakage current of 9.92uA.
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Fri Sep 17 16:42:25 2021, JM RSS ML + OG, CARME Realignment + Thermocouple installation 8x
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Laser surveying team worked till 11. Chamber was too high by 3mm close to the jet target and 6mm by the turbo pump (towards the dipole).
CARME lowered appropriate amount using bolts under CARME feet. Height checked using a laser on the centre point line of the middle flange turbo
end and mid point on the front of the chamber (see images). During lowering front foot swapped and valve supports moved slightly to give more clearance |
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Fri Oct 22 13:22:48 2021, TD, CARME FEE64 adaptor PCB 10x
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Mon Aug 17 08:16:16 2020, TD, CARME Elog
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Test |
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Sat Feb 19 14:51:58 2022, JM, CB, Burst high energy noise
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Noticed bursts of high energy noise on aida01 and aida02 during run 47 and 48.
Good events rate jumps from 10-20k range to 250k. ADC data items rate jumps from 0-1 to 2k. Data rate being written increases to ~2500 kb/s from
~20 kb/s |
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Tue Nov 9 15:03:29 2021, RSS + OG, Burnt cables issues 7x
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Upper part of the frame was mounted. In order to do so, the valve was closed, turbo wire and hose were disconnected and then connected. Valve was opened
again. See pictures 1-2.
Bottom part of the tent was constructed with 3 heaters (from one of the controllers) at the front, 4 in the middle, and 4 at the back (4+4 from |
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Sun Jul 23 10:13:48 2023, RSS, TD, Building tent
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11.15 Pirani 1.0e-03mbar IE514 2.72e-08mbar
16.35 Pirani 1.0e-03mbar IE514 2.61e-08mbar |
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Tue Jul 25 09:12:15 2023, RSS, Building tent
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10:10 IE514 2.0e-08mbar
Upstream part of the CARME is covered. |
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Wed Jul 26 08:28:09 2023, RSS, Building tent
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09:26 IE514 1.96e-08mbar |
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Mon Feb 5 19:43:52 2024, CB, TD, ML, BuTIS reference for VETAR2
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16.40 CB/ML install fibre optic cable from patch panel beneath dipole downstream of YR09/CARME chamber to VETAR2 front panel fibre connector - see attachments
1 & 2.
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Sat Oct 16 17:25:47 2021, RSS TD, Broken detectors
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One of the detectors was damaged while mounting (see pictures 1-3).
Second detector was found already damaged when opened (see pictures 4-5). |
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Thu Feb 3 22:05:33 2022, JM, TD, OH(remotely), Bias update and grounding
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9:30 Bias remained stable overnight - 60V 2.95 uA.
10:00 No grounding attached initailly. Pulser ON, lots of noise across all ~250-300 kHz across biased detector. Waveforms and histograms saved
to /tmp. Pulser width for aida 6 ~300 channels. Aida 7,8 similar, aida 5 producing no ADC data. |
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Sat Jan 13 14:25:05 2024, CB, JM, Bias tests with all FEEs connected
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Connected all FEEs.
The two top fees corresponding to the bottom right detector are connected to damaged flexi rigid PCBs. The top one is missing an pin that should
not be connected to anything, while the bottom one has a slightly cracked connector and is missing the top left pin. Spares should be in Edinburgh. |
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Thu Jul 13 00:12:19 2023, JM, CB, Bellow replaced
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The left (inside ring) bellow for the motors rod was replaced.
Replacing the bellow involved;
One person holding the metal plate the detectors are mounted on (cabling remains plugged in) while the operation is performed.
The |
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Fri Jun 14 14:52:02 2024, JM, Beam-Target Overlap Scan
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The orbit of the beam in the ring was re-configured so that the beam position is more central.
With the target density at ~6e11 at/cm2 this allowed a target overlap scan using the beam lifetime to be performed.
Beam put into bunched mode to allow the number of particles to be observed on Grafana. |
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Sun Jun 9 09:45:27 2024, JM, CB, Beam-Target Overlap
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Target density this morning had stabalised at 7e11 at/cm2
This is sufficient to test the beam/target overlap using the lifetime of the beam in the ring.
Previous attempt at this method was done at 1.5e11 at/cm2 where lifetime from residual gas and target are essentially the same. |
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Fri Jun 6 16:49:59 2025, CB, AY, ST, Beam overlap results for 200keV and 250keV
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For 200keV the optimal horizontal position is -5mm.
For 250keV the optimal horizontal position is -2mm.
Both values are already given to the operators, so tomorrow we can just switch to 200keV and go on :) |
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Sat Feb 17 13:21:44 2024, JM, CB, Beam on target - motors tests
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14:01
Run 36 started.
We put both detectors to the fully out position. Detectors then driven IN using the pnuematic motor only once the beam is ready and driven fully |
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Thu Feb 24 14:31:25 2022, JM, ML, CN, Beam Tuning Run 76 6x
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15:30
1.5 MeV/u beam currently being tuned
Target is ON, setpoint = 135 K |
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Tue Feb 22 04:09:28 2022, JM, CB, LV, PM, AK, Beam ON, Target ON Run 54 - first event at 10MeV ! 11x
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05:00
Beam ON ~2E6 pps, still fluctates between 2e6 and 6e6 (like a step function)
Target ON and open to the ring |