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  Nuclear hyperfine mixing in 229Th89+ 2025  Not logged in ELOG logo
Message ID: 76     Entry time: Sun Jun 29 22:06:19 2025
Author: Carsten, Alex, Hendrik 
Category: Runs 
Subject: 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 |-
22:16 | 4800 | 2e9 | 30 | 104525 | - | - | 300 | 327 | 548.51 - 548.01 | 201 | 15 | 2 | yes | only few ions, did not start Go4 |-
22:28 | 9000 | 2e9 | 15 | 104525 | - | - | 301 | 328 | 548.51 - 548.01 | 201 | 15 | 2 | yes | After this run: Shaky SIS intensity, cathode is being changed |-
22:53 | 7000 | 2e9 | 35 | 104525 | - | - | 302 | 329 | 548.51 - 548.01 | 201 | 15 | 2 | yes |-|-
[/TABLE] 
23:20 Failure of GE01KP04, GE01KP05, GE01KP22 (or GE01KP24) devices in the ESR.
Problems with gtemu3-hick (??) , take injections since 
01:49 Bernd tried to make things work by switching off and on some of the dipole correction coils. He was even able to get a quite good intensity by leaving one of the coils switched off (although with a slight shift of frequencies visible in Schottky spectrum) but then the ESR electron cooler has failed probably due to problems with the cooling water. So, the decision was taken to stop the measurement at this point. The laser was switched off.
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