 Sat Apr 5 14:11:55 2025, CG, GL, ID, General, Run stopped - detectors toast?
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run0034 stopped at 14:11
Leakage currents are increasing and once again we are not fully depleting the pad detectors at 150V.
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Sat Apr 5 15:19:11 2025, Team PLEIADES, General, Run started
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15:14 Started run #35: inside pocket at 20 mm.
Trigger mask changed. Gated only in ch8 in MSI-8 #2 (one side of photodiode)
No events hitting the detector yet.
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Sat Apr 5 17:49:06 2025, CG, GL, ID, Detectors, Outside detector moved in
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After some Sergey-magic the outside pocket moves again. We slowly moved the outside detector in, we are clipping the beam at -20mm. Moved the detector to
-40mm and take some data as of 17:48 (run0036.lmd)
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Mon Apr 7 20:00:13 2025, Guy, General, Results of scope test 
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At 10:50am today, we connected a remote Picoscope to the first 4 n-sides, one end of both resistive chains, and both crystal channels to directly measure
the output of the preamps without the ADC clipping at 2V.
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Tue Apr 8 09:53:45 2025, GL, ID, CG, MC, , Moving in Outside Detector
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At 9:53 we moved the outside detector in to take a short data run. We went -110 mm compared to a fully retracted position -126 mm. Data is collected in
run 38 starting at
9:56:25. Data acquisition was stopped and then moved the detector back at 10:16. |
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Tue Apr 8 11:37:30 2025, GL, ID, CG, MC, JG, , Moving in Outside Detector
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We start recording data in run 39 and the outside detector is moved to -100 mm at 11:36. At 11:59 the detector was moved back to the fully retracted position,
-126 mm, and the
data acquisition was stopped. |
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Wed Apr 9 10:38:05 2025, CG, General, End of experiment
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Final injection stored in ring around 10:00 and will be stored for ~1h.
Both detectors are in the parked position but I started a run just as "background"/to see if we get anything.
We have previously seen some events while in this position so who know what might show up.
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Wed Apr 9 11:02:35 2025, Team PLEIADES, Detectors, Beam stopped, voltages off
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| 11:01 All voltages turned off. Remote control disabled. |
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Thu Apr 10 14:58:02 2025, CG, MC, General, Post-run bias curves
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BGO detector assembly originally on flange A.
GAGG " " flange B.
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Fri Apr 11 14:07:39 2025, CG, General, End of run summary
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All detector components are now in safe storage in Jan's container.
One SiPad (MSPAD 16A) shows lifting of the chip from the PCB in one corner. This has been boxed, labelled and left visible in the lab and should be taken |