Session aimPlasmas for machine conditioning, trying to obtain a long AC discharge
Session day2025-06-16Operatorrhenriques
Session IDISTTOK_20250616_1Coordinatorrhenriques

Shot Time Operator Iplasma(kA) n(1018m-3) Duration (ms) Pre/post shot comments
530752025-06-16 17:02:03.347rhenriques4025Repeat | Density signal not working again, while SINE and COSINE look OK
530742025-06-16 16:34:35.322rhenriques45.725Repeat for signal checks | All OK
530732025-06-16 16:16:05.17rhenriques45.425Repeat after checking the connections | COSINE signal is back and density signal also. The issue could have been the same for both in the end.
530722025-06-16 15:53:07.297rhenriques4025Repeat with cable to data acquisition connected | SINE is OK, but COSINE stopped working, density signal also not working (but not related with intervention)
530712025-06-16 15:44:02.628rhenriques4025Repeat after cabling repair | SINE signal back to its original channel: RT1ch26 | Forgot to connect one of the cables back, ch was floating
530702025-06-16 13:52:56.57rhenriques45.425Repeat | SINE amplifier and cable are working, must be the internal cable of the data acquisition as the channel was working for the calibration
530692025-06-16 13:48:58.453rhenriques000Repeat to check SINE data acquisition cable (sawapping it with the IPLA one in RT2ch4) | Pulse aborted, no plasma
530682025-06-16 11:57:26.12rhenriques45.325Repeat with further changes | Still the sames, no improvements
530672025-06-16 11:51:35.468rhenriques45.225Repeat with Bv changes during transitions | No obvious changes
530662025-06-16 11:44:45.698rhenriques45.525Repeat with 6 semi-cycles and Bv tweak removed | no changes for transitions, 2 neg cycles
530652025-06-16 11:35:08.442rhenriques45.425Repeat with tweaks on Bv for Ip>0 | No clear changes for the transition
530642025-06-16 11:26:56.977rhenriques45.525Repeat with prefill gas opening earlier | Ip flattop in indeed longer and not signs of primary current saturation
530632025-06-16 11:22:46.637rhenriques44.625Repeat going back to Bv for transition as in 53061 and extending duration of cycle to 25 ms (instead of 22 ms) | BD happens too late, maybe due to late operening of gas, despite pressure in chamber OK
530622025-06-16 11:15:54.131rhenriques45.722Repeat with changes in opposite direction | Worse than previous
530612025-06-16 10:59:53.201rhenriques45.722Starting to tweak fields to improve transitions, first changing Bv of transition to Ip<0 | No improvements
530602025-06-16 10:50:56.394rhenriques45.722Repeat 53053 to continue with development of stable BD followed by long AC discharge | BD relatively similar to refrence
530592025-06-16 10:40:57.441rhenriques-5.96.226Repeat (3) 53055 to assess max Ip and wall conditioning | Very similar to previous
530582025-06-16 10:35:22.358rhenriques-5.96.126Repeat (2) 53058 to assess max Ip and wall conditioning | Better than previous but still below reference
530572025-06-16 10:09:19.137rhenriques-5.65.526Repeat (1) 53055 to assess max Ip and wall conditioning | OK, Ip is lower than in reference
530562025-06-16 09:59:21.68rhenriques000Dryrun (file: dryrun_standard_2025_04_04_52149.cfg), no TF | PF currents OK