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Message ID: 68     Entry time: Thu Jun 13 18:03:36 2024
Author: Afternoon shift 
Category: Runs 
Subject: Continuation: First scans 
Time Part. Det. Int ESR-intensity cooler-HV LMD-DAQ1 Files LMD-DAQ2 Files scan range(nm) number of positions dwell time(s) n loops comments
00:01 3e5 104438 13 27-29 550.1 - 550.9 201 2s 4 40 injections, there is still a fast decaying component, may be due to the higher electron current of 200 mA. Going back to 100 mA in next run and also put a "loose" scraper on the inside.


ntcap 2024-06-12_21-47-54

Time Part. Det. Int ESR-intensity cooler-HV LMD-DAQ1 Files LMD-DAQ2 Files scan range(nm) number of positions dwell time(s) n loops comments
00:50 ? 3e5 104438 14 28- 550.1 - 550.9 201 1s 6 30 injections, e-cooler current at 100mA, scraper GE01GD2ID (north arc, inner scraper) now at position +30mm, medusa crashed when started, laser position was lost and retrieved by resetting the beam position stabilization
01:43 25700 3e5 104438 15 31-32 550.1 - 550.9 201 1s 6 e-cooler current 100mA, NA position -30 activated, NI +28, SA -28, DS3HG +10
02:32 21750 4e5 104417 16 33 550.1 - 550.9 201 1s 3 reduced iterations due to short life time
02:54 29200 4e5 104417 17 34 550.1 - 550.9 201 1s 3
03:16 (?) 4e5 104417 18 35 550.1 - 550.9 201 1s 3
03:40 33700 5e5 104417 19 36 550.1 - 550.9 201 1s 3
04:03 31600 5e5 104417 20 37 550.1 - 550.9 201 1s 3
04:25 29200 4e5 104417 21 38 550.1 - 550.9 201 1s 3
04:46 27500 4e5 104417 22 39 550.1 - 550.9 201 1s 3
05:08 30400 4e5 104417 23 40 550.1 - 550.9 201 1s 3
05:31 31300 4e5 104417 24 41 550.1 - 550.9 201 1s 3
05:56 30000 3e5 104417 25 42 550.1 - 550.9 201 1s 3
06:18 24500 4e5 104417 26 43 550.1 - 550.9 201 1s 3 Morning shift took over: Constantine, Peter, Lukas, Jonas, Dounia
06:43 27 44 550.1 - 550.9 201 1s 3 Medusa crashed when starting the laser scan
06:57 4e5 104417 28 45-46 550.1 - 550.9 201 1s 3 DAQ1 started a bit later since we needed to restart and connect the file server again; after starting laser scan we noticed that the beam is gone on glass disk, reason was likely user error as medusa was set to send the laser to 500.9nm instead of 550.9nm
07:27 11800 4e5 104417 29 47 550.1 - 550.9 201 1s 3
07:51 23500 4e5 104417 30 48 550.1 - 550.9 201 1s 3
08:14 15000 5e5 104417 31 49 550.1 - 550.9 201 1s 3
08:37 35300 5e5 104417 32 50 550.1 - 550.9 201 1s 3
08:58 32800 5e5 104417 33 51 550.1 - 550.9 201 1s 3
13.06.2024 17:32 23 500 5e5 104412 35 52 550.1 - 550.9 201 1s 3First scan of afternoon shift. 30 Injections. Electron current was set to 30 mA. (Note added 2024.06.14 17:55 - Carsten: To what I remember electron current is 80mA) Dye was changed before this scan. Wavemeter overexposed on the second scan for 2-3 steps, not sure if during the stepping or actual measurement. In the middle of the third scan, medusa crashed.
13.06.2024 xx 5e5 104417 36 53 550.1 - 550.9 201 1s 3 25 Injections 75Hz particle detector south, medusa crashed immediately, laser controller was locked up. Restarting the laser controller solved the issue.
13.06.2024 18:30 28 200 5e5 104412 37 54 550.1 - 550.9 201 1s 3 25 Injections , DAQ1 no data collected (no start acquisition pressed)
13.06.2024 18:50 26 000 5e5 104412 38 55 550.1 - 550.9 201 1s 3 23 of 25 Injections, two were empty injections from SIS
13.06.2024 19:13 31 600 5e5 104412 39 56 550.1 - 550.9 201 1s 3 29 of 30 Injections, one was empty injections from SIS
13.06.2024 19:45 34 700 5e5 104411 40 57 550.1 - 550.9 201 1s 3 30 of 30 Injections
13.06.2024 20:07 33 300 6e5 104411 41 58 550.1 - 550.9 201 1s 3 30 of 30 Injections. Note: before and after run, the laser was exactly in the middle of the screen, but went to its proper position (slightly left of the middle) during the scan.
13.06.2024 20:36 29 900 7e5 104411 42 59 550.1 - 550.9 201 1s 3 30 of 30 Injections. Note: Before the run ad during the first scan, the laser was above the middle. In the third scan, it was back in its proper position.
13.06.2024 20:57 28 900 7e5 104411 43 60 550.1 - 550.9 201 1s 3
13.06.2024 21:18 26 000 7e5 104411 44 61 550.1 - 550.9 201 1s 3 27 of 30 Injections
13.06.2024 21:40 18 000 6e5 104411 45 62 550.1 - 550.9 201 1s 3 out of the first injections 4 were with low energy and 4 did not arrive at all, for the rest, pretty much every second injection is missing. Checking with HKR.
13.06.2024 22:02 24 900 7e5 104411 46 63 550.1 - 550.9 201 1s 3 Same thing with injection.
13.06.2024 22:23 31 700 7e5 104411 47 64 550.1 - 550.9 201 1s 3
13.06.2024 22:46 30 900 7e5 104411 48 65 550.1 - 550.9 201 1s 3
13.06.2024 23:09 33 100 7e5 104411 49 66 550.1 - 550.9 201 1s 3 Laser shifted to the left
13.06.2024 23:33 25 200 7e5 104411 50 67 550.1 - 550.9 201 1s 3
13.06.2024 23:55 28 600 7e5 104411 51 68 550.1 - 550.9 201 1s 3 We moved the laser back to the original position using the MRC
14.06.2024 00:52 33 100 8e5 104410 52 69 549.85 - 550.9 239 1s 3 Widen scan range to account for the difference between wavelength vac. vs. wavelength air; Laser shifted to the left
14.06.2024 01:20 29 800 8e5 104410 53 70 549.85 - 550.9 239 1s 3
14.06.2024 01:44 -- 7e5 104410 54 71 549.85 - 550.9 239 1s 3 Medusa crashed and was restarted; measurement interrupted; connection of MBS to Labview server crashed and MBS and go4 were restarted (DAQ1)
14.06.2024 02:03 34 700 8e5 104410 55 72 549.85 - 550.9 239 1s 3
14.06.2024 02:26 31 400 7e5 104411 56 73 549.85 - 550.9 239 1s 3
14.06.2024 02:49 -- 7e5 104411 57 74 549.85 - 550.9 239 1s 3 Medusa crashed and was restarted; measurement interrupted
14.06.2024 02:51 -- 7e5 104411 58 75 549.85 - 550.9 239 1s 3 Medusa crashed and was restarted;


The Medusa crash also crashed the Cobra Laser. We tried to restart it but afterwards the power of the Laser was more than one order of magnitude lower than before. It is not clear what caused the problem, Rodolfo is on his way to GSI now to fix the issue.
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