 Tue Apr 15 12:23:10 2025, JM, Leakage current / CARME issues 18x
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14/04/25
Arrived at GSI in the afternoon.
Found that the coolant loop on aida08 had popped out which resulted in the high FEE temperatures observed (see attachment 1). Female swagelock |
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Wed Apr 16 08:20:05 2025, JM, Grounding 14x
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09:00
Leakage currents this morning again appear to have lowered during the night. Current plot shows a day/night variation but I think the minimum
is decreasing ever so slightly. |
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Thu Apr 17 08:51:29 2025, JM, Grounding cont. 29x
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09:00
Came in to see the bias for DSSD4 which has been fluctuating for the past few days had tripped during the night. From the gnuplot it looks like
it was fluctuating all night and just after midnight it went above 20uA and tripped. |
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Fri Apr 18 08:17:38 2025, JM, More testing 15x
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09:10
Arrived at GSI. Leakage currents status same as before, DSSD4 is still fluctuating. DSSD1 and DSSD3 currents are definitely lower again compared
to previous days. I am convinced they are decreasing over time, whether this will be enough for our measurement.... |
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Fri Apr 18 16:18:33 2025, JM, D+D BBN energies test 16x
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D+D minimum energy Ecm = 150 keV which corresponds to Ed=150 keV/u or Ed=300 keV. Therefore we need a threshold below this.
Test 1 - Current status
Current slow comparator threshold is 0x64 (1 MeV). ADC data items rate in all FEEs is essentially zero with this threshold. (except aida03 and |
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Tue May 13 15:07:42 2025, JM, Online monitoring code
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CARME_Sort histogramming has been updated to aid our understanding online.
> XY plots have been updated to reflect the true position of the beam relative to each detector. Online we will be able to layout in a grid
to reflect looking downstream in YR09 (see attachment 1) |
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Sat May 17 11:19:06 2025, JM, Shifter intructions 2025
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EMERGENCY SHUTDOWNS
1. CARME motors: Q key on keyboard while on workspace 1 of appc218 (right of this double-monitor setup)
2. Internal target: |
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Tue May 20 19:38:36 2025, JM, CARME restart 6x
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19:00
Arrived at GSI.
We have 6Li1+ beam in the ring at 2 MeV/u. Injection is about 2.5e7 pps and lifetime with no target is about 40 seconds. We have injection every |
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Tue May 27 05:03:41 2025, JM, DAQ restart 7x
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06:00
FEE modules power cycled.
No issues on power cycle restart. |
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Sat May 31 09:58:21 2025, JM, Run 38 10x
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10:56
Run 38 started.
D+ beam deuterium target. D+ beam energy is 1.5 MeV/u. (beam calc calculation is 1.5160 MeV/u) |
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Wed Jun 4 00:10:39 2025, JM, Run 49 - beam only 6x
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01:10
Gas target turned off via the shutter valve.
Run 49 started beam only background run. |
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Thu Jun 12 06:20:50 2025, JM, Run 68,69 - background
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07:20
Started a background run while the cave is open.
All ASIC settings remain unchanged, we just have no beam. |
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Mon Feb 28 10:55:48 2022, JG, US, Current status 8x
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11:55
beam intensity at injection: 8e7 ions
Temperature setpoint = 110 k |
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Fri Jan 19 11:17:50 2024, JG, TD, Friday 19 January 18x
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12.20 CARME IE514 4.1e-11mbar, ambient temperature 16.7 deg C
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Wed Mar 6 10:47:11 2024, JG, TD, Wednesday 6 March - PEXARIA5 WR test
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Courtesy Nik Kurz, JG has installed a PEXARIA5 PCIe card adjacent to CARME - BuTIS single-mode fibre input
and HDMI output to root MACB input for distribution to the other MACBs and FEE64s.
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Thu May 22 06:41:10 2025, JG, TD, R6 - R11 scrapers test / pulser walk 33x
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07.00
JG found target off (target data stopped c. 02.30 this morning) and beam off (not re-enabled from previous CRYRNG area entry - target related?) JG re-enables |
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Fri Jun 13 14:45:58 2025, JG, SS, JM, CB, EW, AR, Run 75
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90 keV/u beam on target, Target overlap confirmed with lifetime measurement using bunched beam - @ -12.5mm
We do not expect to see see Rutherford due to energy loss in the dead layer, using other particle detector for normalsiation. |
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Fri Jun 13 19:41:32 2025, JG, SHB, JM, AR, EW, OF, Run 77, 78, 79 17x
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New run started - Run 77 after refilling LN2 dewar
Same settings as Run 75 & 76
The root histos have not been reset, i.e. they show combined statistics of run 75, 76 and 77. |
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Fri Jun 13 16:39:18 2025, JG, SHB, Run 76 7x
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Same settings as run 75.
Detector 4 is biased at 100V and switched from MEC to LEC.
The root histos have not been reset, i.e. they show combined statistics of run 75 and 76. |
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Thu Feb 24 08:15:23 2022, JG, MS, check 13x
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Beam is still beeing tuned. Target is off.
There is a problem with ADC calibration of aida5: see entry https://elog.ph.ed.ac.uk/CARME/268
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