 Sat Jun 21 22:33:04 2025, Peter , Danyal, Detectors, PMTs are switched off
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| We have switched off all 3 PMTs ! |
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Mon Jun 23 01:01:17 2025, Carsten, Detectors, CAEN PMT Power supply
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Since yesterday, channel 0 of the CAEN PS is dead (no voltage even without cable).
Changed detector south to channel 3. |
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Mon Jun 23 18:36:39 2025, Wilfried, Simon, Detectors, PMT test with LED
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We tested the PMTs again, this time with an UV LED that is mounted at a window close to the XUV detector.
PMT south showed a very clear increase in count rate from about 1 to 50 Hz.
PMT mid also showed a small increase by a few Hz.
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Tue Jun 24 12:25:34 2025, Carsten, Detectors, PMT behaviour - noise / PMT voltages / CFD Threshholds / CAEN Power supply (broken channel resetted)
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In position North there is still the "old" 9423B PMT that draws quite some current.
On this detector threre is also some quite substantial noise. Very likely the base is not ok any more. Noise was much lesss for the other two PMTs.
Since position NORTH is the position with the largest sold angle, if there is another break from the accelerator we should exchange it against SOUTH.
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 Tue Jun 24 17:39:13 2025, Carsten, Stefan, Simon, Rima, Nils, Detectors, PMT behaviour - noise / PMT voltages / CFD Threshholds / CAEN Power supply (broken channel resetted)
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PMT North and South have been changed:
CFD CH0: Middle Thr 7 / CAEN HV Ch1: 2750 V
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Thu Jun 26 18:13:17 2025, Jan, Carsten, Detectors, PMT voltages & thresholds
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current settings of PMT voltages and thresholds at the CAEN CFD:
PMT South [HV ch2: 2700V] [CFD ch0: 8]
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Wed Jun 11 11:20:23 2025, Konstantin, Simon, DAQ, octal gate generator delays
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We checked the set delays of the OG 8000 octal gate generator and compared them with the values measured before the Bi-beamtime (see [URL=https://elog.gsi.de/esr/E0038/34]entry
34[/URL]).
All values match within an uncertainty of <1ns
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Wed Jun 11 17:33:04 2025, Carsten, Jan, DAQ, DAQ2 - new computer , new directories (lxg0155 doesn't work reliably)
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LXG0155 (used in form er beamtimes) crashes and hangs and hangs eventually.
Lgx0155 is shut-down and is replaced by [B]lxg3113[/B].
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Thu Jun 12 15:53:13 2025, Carsten, DAQ, data directory and backup disk (WDBook2 RAID)
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The data of DAQ1 are stored in the following directory and with the following filenames
open file /data.local2/2025_229Th/2025_229ThDAQ1_ -auto -rfio
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Thu Jun 12 16:27:45 2025, Carsten, DAQ, NTCAP directory
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On the NTCAP the directory is changed to
Q:/E0052 |
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Fri Jun 13 18:14:02 2025, Konstantin, Carsten, DAQ, DAQ Folder
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Dryrun of DAQs. Folders of the data are:
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Mon Jun 16 07:26:01 2025, Konstantin, DAQ, Startup of Medusa and DAQ1 
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The laser control software (Medusa) is hosted on the Windows PC ATPPC023. First connect via the command
atplaser@lxg1297:~$ [B]xfreerdp /w:2500 /h:1400 /u:atplaser /v:atppc023.campus.gsi.de[/B]
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Mon Jun 16 22:27:01 2025, Carsten, Simon, DAQ, Thresholds
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We also adjusted the thresholds for the mesytic.
Doing that, we noticed that one of the trafos is broken (5th row, middle).
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Tue Jun 17 16:33:16 2025, Carsten, Simon, DAQ, Gate Q-swtich
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| The gate generator of the Q-switch signal for the Vuprom TDC was set to 10ms. |
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Wed Jun 18 00:33:56 2025, Esther, Alexis, Anton, Rodolfo, Carsten, DAQ, R4l-41
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We have some issues with the RIO computer R4l-41 (DAQ1). We had to switch off completely twice. Only then it reacted properly. Maybe a problem with the
network at about 00:00 o'clock? |
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Sun Jun 22 18:47:23 2025, Carsten, Peter, Marek, Simon, DAQ, PMT and particle detector settings
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Final voltages and thresholds for the PMTs and particle detectors before the first scan:
[TABLE border="1"]
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Tue Jun 24 15:44:06 2025, Konstantin, DAQ, Phase shift in DAQ1
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In the SetParameters.C file is a parameter called fPar->piPhaseOffset. It was shifted from 100 to 50 in order to see ion bunches in the pmt signal and laser
pulses in the photodiode signal during the same revolution in the TDC spectrum. Note that this parameter must be taken
into account when setting the window conditions of the arrival time in the SetConditions.C file. |
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Fri Jun 27 11:21:25 2025, Esther, Konstantin, DAQ, Timing
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We cross-checked the timing. Laser pulse is detected at bins 136 (PD-North) and 171 (PD-south), respectively. Therefore, the laser puls is in the electron
cooler at 153.5. The revolution period corresponds to 3e8Hz / 1.54315MHz = 194.
The ion bunch must travel 2.5m more than the half of the circumference (108.3m). Taking this into account, the ion bunch must be detected (0.5 + 2.5 / |
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Thu Jun 26 21:27:34 2025, Carsten, Jan, Simon, Calibration, Timing
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We checked the timing (before the start of the measurement cycle documented below).
Timing and measurement window are attached. |
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Wed Jun 18 19:05:28 2025, Carlo, Zac, Shahab, Ragan, Analysis, PID with rionid
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For PID with rionid we used:
- LISE file from last year (attached.
- .npz file from 410 RSA (attached). |