 Sun Jun 22 21:36:48 2025, Carsten, Finn, Zac, Esther, Runs, First laser scans
|
[B] Scan parameters:[/B]
[TABLE border="1"]
|
|
Mon Jun 23 10:59:36 2025, Julian, Lukas, Zsolt, Nadine, Konstantin, Runs, Scan routine
|
-Start new injection
->wait for 60 injections to be complete
->note down SIS intensity (at extraction)
|
|
Tue Jun 24 18:49:18 2025, Carsten, Rima, Nils, Simon, Runs, Second attempt (Late shift 24.06.)
|
[B] Scan parameters:[/B]
[TABLE border="1"]
|
|
Tue Jun 24 22:24:36 2025, Carsten, Finn, Hiroshi, Esther, Rodolfo, Runs, Data taking (night shift 24.06.)
|
[B] Scan parameters:[/B]
[TABLE border="1"]
|
|
Thu Jun 26 19:01:46 2025, Carsten, Jan, Simon, Runs, Late shift 26.06.
|
[B] Scan parameters:[/B]
[TABLE border="1"]
|
|
Thu Jun 26 22:51:04 2025, Hendrik, Finn, Runs, Nightshift data runs
|
After the scan at 22:04 teh FCU new was new calibrated. For this MEdusa was stopped and reopened in the laser lab. This stops the Labview server, and as
a consequence the the connection to the MBS was lsot. Then, MBS needs to be restarted and the online data is cleared. Such an intervention should avoided
as good as possible.
|
|
Fri Jun 27 06:13:02 2025, Esther, Konstantin, Runs, Early shift - data taking
|
[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
|
|
Fri Jun 27 14:23:39 2025, Nils, Wilfried, Carsten, Julian, Runs, Runs afternoon shift 27.06.
|
15:30 We have a break due to an issue at UNILAC (quadrupole failed). Also radiation safety interlock was triggered at the fragment separator. This also
pushed a faradaycup into the ESR (GE01DC3VP).
Just before the issue during the last bunching, the peak was misaligned to the marker in the Schottky. The marker was sitting on the right flank. So the |
|
Fri Jun 27 22:14:35 2025, Anton, Finn, Carsten, Runs, Runs night shift 27.06. 28.06
|
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)
|
|
Sat Jun 28 06:29:58 2025, Stefan, Simon, Konstantin, Runs, Morning shift 28.06.
|
6:30 Problem with ion source, on-call service is called
7:30 There is a short in the ion source and it needs to be changed. Expected down time about 2h
10:30 Ion source was successfully changed, but while ramping up the source a power supply failed. Next on-call service is on their way to GSI.
|
|
Sat Jun 28 15:28:22 2025, Carsten., Uwe , Runs, Runs with new scan range
|
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)
|
|
Sun Jun 29 03:03:56 2025, Nadine, Finn, Runs, Night shift runs with laser
|
around 22:00 water cooling circuit failure of ESR electron cooler--> ~1h downtime
Wavemeter frequently overexposed around 549,3nm; other wavelengths are fine
|
|
Sun Jun 29 06:11:49 2025, Stefan, Konstantin, Runs, Morning Shift 29.06.
|
[TABLE border="1"]
|
|
Sun Jun 29 18:04:11 2025, Carsten, Simon, Runs, Late shift 29.06.
|
[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 |-
|
|
Sun Jun 29 22:06:19 2025, Carsten, Alex, Hendrik, Runs, Night shift 29.06.
|
[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 |-
|
Fri Jun 6 14:27:10 2025, Rodolfo, Konstantin, Laser, MRC Beam Stabilization Presettings 
|
These are the settings for the Beam Stabilization from MRC.
Laser-beam energy ca. 18 mJ @ 275 nm |
|
Wed Jun 18 03:12:25 2025, Rodolfo, Laser, Beam Stabilization
|
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 |
|
Wed Jun 18 07:59:00 2025, Julien, Konstantin, Laser, Phase-offset
|
We recognized that the output power of the pump laser was instable when externally triggered with 200kHz (stand-bye frequency of ESR). Therefore, we changed
the coarse timing offset of the pockels cell trigger compared to the flash lamp pulse from 215µs to 219.9µs.
Thereby, the output power increased from ~600mJ to 620mJ, and the PTP stability improved from 15% to 10%. The RMS stability improved from 2% to 1.2 %. |
|
Wed Jun 18 08:07:17 2025, Julien, Konstantin, Laser, new FCU Calibration
|
UV power was not stable but dropping from ~18 mW to 13 mW after opening COBRA shutters.
New calibration of frequency conversion unit:
|
|
Fri Jun 20 11:25:32 2025, Julien, Kristian, Konstantin, Laser, Automated laser scans
|
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]. |
|