Session aimAcquisition tests and calibrations, then plasma pulses to check filament
Session day2025-04-02Operatorrhenriques
Session IDISTTOK_20250402_1Coordinatorrhenriques

Shot Time Operator Iplasma(kA) n(1018m-3) Duration (ms) Pre/post shot comments
521382025-04-02 17:29:03.468rhenriques-1.254.517Repeat for statistics, buffer at 1170 mBar | plasma started with 1st inversion to Ip<0
521372025-04-02 17:23:25.672rhenriques-1.3254.2417Repeat for statistics, prefill was on the low side -> buffer at 1165 mBar | better but sill a bit on the low side
521362025-04-02 17:15:07.144rhenriques-1.2284.4517Repeat with filament voltage at 13.5 V, buffer at 1150 mBar | plasma started with inversion to Ip<0, negative semi-cyles failed towards the end of the discharge
521352025-04-02 17:04:31.794rhenriques-1.3283.8817Repeat for statistics, buffer at 1150 mBar | prefill on the low side
521342025-04-02 16:57:05.985rhenriques-1.3093.8417Repeat for statistics and slight increase of prefill, buffer at 1155 mBar | OK
521332025-04-02 16:51:52.614rhenriques-1.323.8217Repeat with filament voltage at 12.5 V, buffer at 1147 mBar | prefill a bit on the low side
521322025-04-02 16:43:57.526rhenriques-1.324.1217Repeat for statistics, buffer at 1145 mBar | Breakdown happened at the end of the 2nd positive semi-cycle
521312025-04-02 16:38:27.03rhenriques-1.343.917Repeat for statistics, buffer at 1145 mBar | Breakdown started much later than usual, some failed negative cycles towards the end
521302025-04-02 16:32:35.84rhenriques-1.2134.3717Repeat with filament voltage at 0 V | No breakdown, plasma started with 1st inversion to Ip<0
521292025-04-02 16:21:44.259rhenriques-1.2873.7917Repeat for statistics, buffer at 1155 mBar | OK, prefill pressure spot on
521282025-04-02 16:11:16.389rhenriques-1.2983.7417Repeat with earlier opening of prefill to lower pressure | OK, prefill slightly on low side
521272025-04-02 16:05:42.858rhenriques-1.273.7517Repeat to try to get a closer prefill pressure, buffer at 1169 mBar | Prefill pressure still too high
521262025-04-02 15:54:00.269rhenriques-1.2753.7917Repeat aiming higher prefill, buffer pressure at 1179 mBar | prefill a bit on the high side
521252025-04-02 15:48:58.156rhenriques-1.2743.717Repeat with filament voltage at 8.5 V | prefill pressure too low
521242025-04-02 15:35:48.15rhenriques-1.2443.6617Repeat for statistics | Good
521232025-04-02 15:30:50.682rhenriques-1.2523.717Repeat statistics and with correctin on prefill pressure, buffer at 1185 mBar | Good
521222025-04-02 15:23:35.241rhenriques-1.2673.8217Repeat for statistics and higher prefill pressure, buffer prefill at 1171 mBar | OK, prefill pressure still on the low side |
521212025-04-02 15:03:38.163rhenriques-1.2523.7617Repeat | OK, but prefill pressure on the low side
521202025-04-02 14:59:13.095rhenriques000Repeat with filament voltage at 9.5 V | Real-time control failure, no real-time data
521192025-04-02 14:52:34.893rhenriques-1.2553.7217Repeat for statistics, buffer pressure at 1161 mBar | Good
521182025-04-02 14:45:42.932rhenriques-1.253.6217Repeat for statistics, buffer pressure at 1155 mBar | OK
521172025-04-02 14:41:18.768rhenriques-1.2433.5917Repeat with filament voltage at 10.5 V | OK
521162025-04-02 14:34:37.782rhenriques-1.2293.5217Repeat, first point of the scan, starting with filament voltage at 11.5 V | OK
521152025-04-02 14:28:53.167rhenriques-1.2273.56717Repeat to check repeatability | Good
521142025-04-02 14:24:33.707rhenriques-1.23.4617Repeat, buffer pressure at 1150 mBar, prefill opening at -15 s | OK, but prefill lower than previous pulse
521132025-04-02 12:03:10.562rhenriques-1.153.6517Repeat | OK, reference for breakdown seems to be established
521122025-04-02 11:50:23.222rhenriques-1.1263.6817Repeat, opening prefill earlier to see if it improves repeatability | Good
521112025-04-02 11:45:13.603rhenriques-1.1483.6317Repeat to assess if reference is established | Not yet...
521102025-04-02 11:39:01.78rhenriques-1.1123.5217Repeat trying to stabilize prefill pressure over pulses | OK
521092025-04-02 11:30:14.713rhenriques-1.123.4617Repeat | OK, but prefill still changing over pulses...
521082025-04-02 11:20:52.442rhenriques-1.043.4617Repeat with lower prefill pressure | Better breakdown
521072025-04-02 11:16:09.35rhenriques-0.983.5617Repeat to get a stable reference | Better, but preffil pressure was too high
521062025-04-02 11:09:56.508rhenriques-13.4517Repeat plasma pulse no. 52073 | forgot to arm sprectrometer, some semi-cycles have failed
521052025-04-02 11:00:31.397rhenriques000Dryrun (file: dryrun_standard_2025_03_26_52008.cfg) | PF and TF currents OK
521042025-04-02 09:22:46.70rhenriques000Calibration of B3 all chs. (1-32) with 0 V (shorted input) | OK
521032025-04-02 09:18:25.096rhenriques000Calibration of B3 all chs. (1-32) with -4.096 V | OK
521022025-04-02 09:13:52.092rhenriques000Calibration of B3 all chs. (1-32) with +4.096 V | OK
521012025-04-02 09:04:18.786rhenriques000Trying again: Test RT3 with 0.5 Vpp 8.5 Hz square wave (firmware for chopper) while same inupt in RT1 ch.1-16 for comparison | Good
521002025-04-02 08:52:44.424rhenriques000Repeat because data of previous pulse does not seem right | data acquired but signal not present, bad connection
520992025-04-02 08:44:02.162rhenriques000Repeat | OK, data was acquired
520982025-04-02 08:38:24.817rhenriques000Test RT3 with 0.5 Vpp 8.5 Hz square wave (firmware for chopper) while same inupt in RT1 ch.1-16 for comparison | No real-time data