 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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Wed Jun 25 05:53:54 2025, Rodolfo, Laser, FCU
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| Cobra's FCU was recalibrated. Table saved as FCU_547-554_RS_2024-06-25.fcu. |
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Fri Jun 27 06:13:02 2025, Esther, Konstantin, Runs, Early shift - data taking
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[B]Notes:[/B]
1. TE slits at -10 and +10
2. SIS intensity unstable until about 9:00 after that it became much more stable
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Sat Jun 21 00:23:22 2025, Rodolfo, Laser, Dye 
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| I have prepared new (fresh) dye solutions of Fluorescein 27: 2 charges. They are in the Safety Cabinet (Sicherheitsschrank) in the ESR Laser lab |
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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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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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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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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 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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Wed Jun 18 03:12:25 2025, Rodolfo, Laser, Beam Stabilization
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The laser beam pointing has changed, even thought the MRC settings are the same as given in Entry 5 (this elog). This could be caused by a droping of the
laser output energy which is now 13,8 mJ @275 nm |
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Sun Jun 22 22:29:04 2025, Carsten, Accelerator, Backup copy of present accelerator settings - don't use if you don't know what you are doing
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# Version: 1.3
# Comment: ParamModi Export at 2025-06-22T22:28:05.633712878+02:00[Europe/Berlin]
# Context: ESR_25_12_THORIUM_20June_v3.C1
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Fri Jun 20 11:25:32 2025, Julien, Kristian, Konstantin, Laser, Automated laser scans
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In contrast to entry [URL=https://elog.gsi.de/esr/E0052_2025/12]E12[/URL], the cabling for the automated start of the laser scan is now connected to [B]IO3
of sddsc221[/B]. |
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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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