 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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Sun Jun 29 15:53:45 2025, Carsten, Simon, Accelerator, No scans possible
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15:45 Right now, we are waiting for stable conditions again. There are problems with both the ion source and the accumulation in SIS.
16:20 SIS and source look better now, but now ESR makes trouble. The stacking looks off and after deceleration and cooling barely any Th-ions are stored. |
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Sun Jun 29 18:04:11 2025, Carsten, Simon, Runs, Late shift 29.06.
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[TABLE border="1"]
Time | Part. Det. Int | SIS-intensity| accumulations in ESR | cooler-HV PTB K250 | cooler-HV PTB red | cooler-HV orange | LMD-DAQ1 Files | LMD-DAQ2 Files
| scan range(nm) | number of positions | dwell time (laser shots) | n loops | checked laser position | comments |-
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Wed Jun 18 20:24:01 2025, Carsten, Shahab, Ragandeep, Danyal et al. (the dayshift) and ESR crew, Accelerator, 229Th89+ identification 
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We believe to have identified the 237U92+ and the 229Th89+ peaks.
Using the Schottky resonator at about 244 MHz and taking the 123rd harmonic:
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Wed Jun 18 00:56:28 2025, Carsten, Rodolfo, Anton, Alexis, Esther, , beam overlap with t-scrapers
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When testing the overlap between laser and ion beam we observed the following positions:
[TABLE border="1"]
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Tue Jun 24 18:49:18 2025, Carsten, Rima, Nils, Simon, Runs, Second attempt (Late shift 24.06.)
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[B] Scan parameters:[/B]
[TABLE border="1"]
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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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Sat Jun 21 18:00:49 2025, Carsten, Peter, Danyal, Kristian, Marek , Detectors, PMT signals
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Carsten and Kristian changed (18:00) the thresholds of PMT north and PMT middle in the ESR cave.
See picture below. The effect is negligible.
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Sat Jun 21 17:00:10 2025, Carsten, Peter, Danyal, Kristian, Marek, Detectors, PMT north exchanged
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We noted that the dark countrate of PMT north is about 20x higher than that of PMT middle.
We went into the ESR cave to look for stray light.
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Thu Jun 26 19:01:46 2025, Carsten, Jan, Simon, Runs, Late shift 26.06.
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[B] Scan parameters:[/B]
[TABLE border="1"]
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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 11 16:44:39 2025, Carsten, Jan, Detectors, Detector voltages and thresholds for DAQ2 (Mesycontrol)
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Voltages (2650v) for the small band 9423 is ok. Signals are nicely separated from background, thresholds can be easily set.
For the broadband 9422 the voltage is by far too low. Signals and BG are barely separated.
Increased voltage from 1500V to 1750V (according to datasheet Vmax = 2500V, 1500 V is the min voltage for gain 1e6...).
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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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Sun Jun 22 21:36:48 2025, Carsten, Finn, Zac, Esther, Runs, First laser scans
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[B] Scan parameters:[/B]
[TABLE border="1"]
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Tue Jun 24 22:24:36 2025, Carsten, Finn, Hiroshi, Esther, Rodolfo, Runs, Data taking (night shift 24.06.)
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[B] Scan parameters:[/B]
[TABLE border="1"]
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Sun Jun 29 22:06:19 2025, Carsten, Alex, Hendrik, Runs, Night shift 29.06.
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[TABLE border="1"]
Time | Part. Det. Int | SIS-intensity| accumulations in ESR | cooler-HV PTB K250 | cooler-HV PTB red | cooler-HV orange | LMD-DAQ1 Files | LMD-DAQ2 Files
| scan range(nm) | number of positions | dwell time (laser shots) | n loops | checked laser position | comments |-
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Sat Jun 21 01:40:31 2025, Carsten, Alex, Anton, Rodolfo, Hiroshi, Accelerator, beam parameters
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The revolution frequency for the measurement condition is: 1.542728 MHz.
The electron cooler voltage is: 104411 V. |
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Mon Jun 2 16:36:57 2025, Carsten, Detectors, Mesycontrol
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ssh -Y litv-exp@x86l-204
'mesycontrol' |
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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 |