 Sat Jun 21 00:52:07 2025, Carsten, Accelerator, Summary of the last days (bunches wiht several isotopes still in ) / frequency of the
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Initially, we has very low SIS beam intensities in the 1e8 region. Setting up ESR wiht Stacking etc. turned out to be extremly tedious for the ESR crew.
Yet, they managed to get stochastic ooling working early on.
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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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Sun Jun 22 23:48:35 2025, Carsten, Accelerator, Summary of todays settings and tests
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Scraping, beam intesnity optimizations and nuching were set up and optimized during the day.
[B]Initial findings[/B]
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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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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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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). |
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Sat Jun 21 07:28:35 2025, Arya, Julien, Wilfried, Laser, Laser Timing
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We roughly adjusted the timing based on attachment 1, for ions to be in center of electron cooler (east arc), corrected for PMTs being 2.5m closer to the
north on the west arc
then did a new 30 injection accumulation (10.8k counts on particle detector) and readjusted the timing to fine tune this
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Sat Jun 21 08:48:16 2025, Arya, Julien, Wilfried, Accelerator, Low 229Th particle numbers and 229Th lifetime in ring
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With reference to entry 37 Laser timing:
- at last 30 injections accumulation: 10k counts on particle detector (accumulated during manipulation until it saturates, e.g. no more Th in ESR)
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Sat Jun 21 11:42:50 2025, Arya, Julien, Wilfried, General, Test laser scan
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Test scan to see whether laser spot is moving while scanning
Aborted accumulation because SIS stopped. 12.9k counts
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Sun Jun 22 11:31:59 2025, Arya, Carsten, Julien, Konstantin, General, Summary morning shift
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1. UNILAC running again, so we resumed the beam tuning wherre we stopped yesterday at 14:00
2. Goals: Reduce intensity and lifetime of "antibunch" contamination while maximising intensity for main bunch/on PD
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Fri Jun 27 22:14:35 2025, Anton, Finn, Carsten, Runs, Runs night shift 27.06. 28.06
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22:10 SIS Trafo GS09DT scale was changed to 4e8 (not just the lassie monitor)
23:50 Ausfall ESR: GE01 KP01 bis KP05 und KP22 bis KP24; Korrekturelement: GE02KX6 und GE01KX2; beam loss during measurement
01:45 reser press air Scrapers: GE02DD2_G (sc8,11); GE02DS03HG(sc7,8,11); GE01DD2IG(was sc7,10,11)(now7,8,11)
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Sat Jun 21 02:32:24 2025, Alex, Anton, Rodolfo, Hiroshi, Carsten, Laser, Laser scanning setting
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This is the initial scanning range
[LIST]
[*] 3 Loops
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Sat Jun 21 03:13:02 2025, Alex, Anton, Rodolfo, Hiroshi, Detectors, Part Det South
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Bunch signal on Particle Detector South. On the
[LIST]
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