http://elog.czopowicz.pl/Experts+logbook Logbook for all experts' activities ELOG V3.1.3 http://elog.czopowicz.pl/Experts+logbook/elog.png http://elog.czopowicz.pl/Experts+logbook http://elog.czopowicz.pl/Experts+logbook/376 We are trying to find signal in trigger jitter. We switched VTPC-1 trigger optic cable to counting house - failed reverted Tue, 11.08.2026 18:08:18 [MB] We would like to use the beam to show new student (Anastasiia) how VD readout works. Tue, 11 Aug 2026 16:48:37 +0200 http://elog.czopowicz.pl/Experts+logbook/375 Mon, 03 Aug 2026 08:56:26 +0200 http://elog.czopowicz.pl/Experts+logbook/374 VTPC-1 Gap TPC VTPC-2 FTPC 1 MTPC-L MTPC-R FTPC 2 FTPC 3 Wed, 8.07.2026 16:40:55 500V/13kV 500V/8.16kV 500V/13kV 500V/17.3kV 500V/19kV 500V/19kV 500V/17.3kV 500V/17.3kV Full drift voltage and potential strips ON in big TPCs, 500V on sense wires, Gating Grid turned on. (VO) Wed, 8.07.2026 17:49:23 600V/13kV 600V/8.16kV 600V/13kV 600V/17.3kV 600V/19kV 600V/19kV 600V/17.3kV 600V/17.3kV +100V on sense wires, now at 600V (VO) Wed, 8.07.2026 18:48:15 600V/13kV 600V/8.16kV 690V/13kV 600V/17.3kV 600V(SR)/640V(HR)/19kV 600V(SR)/640V(HR)/19kV 600V/17.3kV 600V/17.3kV +40V on MTPCs(HR), +90V VTPC-2 sense wires, 400V below nominal (VO) Wed, 8.07.2026 18:53:46 700V/13kV 700V/8.16kV 690V/13kV 700V/17.3kV 700V(SR)/640V(HR)/19kV 700V(SR)/640V(HR)/19kV 700V/17.3kV 700V/17.3kV +100V on rest sense wires, MTPCs(SR) 400V below nominal (VO) Wed, 8.07.2026 20:22:48 800V/13kV 780V/8.16kV 690V/13kV 780V/17.3kV 700V(SR)/640V(HR)/19kV 700V(SR)/640V(HR)/19kV 750V/17.3kV 750V/17.3kV all TPCs, except VTPC-1(1,4) 400V below nominal (VO) Wed, 8.07.2026 21:40:19 850V(1,4)/800V/13kV 780V/8.16kV 690V/13kV 780V/17.3kV 700V(SR)/640V(HR)/19kV 700V(SR)/640V(HR)/19kV 750V/17.3kV 750V/17.3kV all TPCs 400V below nominal (VO) Thu, 9.07.2026 15:14:16 850V(1,4)/800V/13kV 780V/8.16kV 690V/13kV 0V/17.3kV 700V(SR)/640V(HR)/19kV 700V(SR)/640V(HR)/19kV 750V/17.3kV 750V/17.3kV ramp down to 0V the FTPC-1 due to the 8.5nA current (VO) Thu, 9.07.2026 15:50:15 850V(1,4)/800V/13kV 780V/8.16kV 690V/13kV 100V/17.3kV 700V(SR)/640V(HR)/19kV 700V(SR)/640V(HR)/19kV 750V/17.3kV 750V/17.3kV +100V on FTPC-1, I = 1nA (VO) Thu, 9.07.2026 16:48:01 850V(1,4)/800V/13kV 780V/8.1 Wed, 08 Jul 2026 15:39:06 +0200 http://elog.czopowicz.pl/Experts+logbook/373 Mon, 6.07.2026 10:00:00 (A.Laszlo): HV jumper settings: GRC-1 all SenseWires ON (low multiplicity setting -- unchanged), GRC-2 all SenseWires ON (low multiplicity setting -- unchanged). Gas pressure reducers: GRC-1,2 at about +0.5 bar above atmospheric pressure, both for Ar and for CO2. Gas flow: GRC-1,2 at 4.0 l/h : 0.8 l/h (Ar:CO2). Gas stability: checked stability of flow a few times with a few hours of waiting time. Gas safety bubbler: checked that the safety bubbler at the GRC inlet against overpressure is _not_ bubbling. Voltages: Udrift=-20V (the HV supply cannot issue active -0V), Usw=1600V. Isw(spill,target-out)=?nA, Isw(nospill,target-out)=?nA. Safety settings for SenseWire HV: HV max setting: Umax=1620V. HV ramp setting: DU/Dt(up)=11V/s, DU/Dt(down)=11V/s. HV trip setting: Imax=0.6uA, tmax=1s. Safety settings for Drift HV: HV max setting: Umax=-30V. HV ramp setting: DU/Dt(up)=5V/s, DU/Dt(down)=5V/s. HV trip setting: Imax=5uA, tmax=2s Wed, 08 Jul 2026 14:00:14 +0200 http://elog.czopowicz.pl/Experts+logbook/372 Wed, 01 Apr 2026 08:33:40 +0200 http://elog.czopowicz.pl/Experts+logbook/371 [TABLE border="0" cellspacing="10"] | VTPC-1 | Gap TPC | VTPC-2 | FTPC 1 | MTPC-L | MTPC-R | FTPC 2 | FTPC 3 | | |- Wed, 11.03.2026 20:50:00 | 500V/13kV | 500V/8.16kV | 500V/13kV | 500V/17.3kV | 500V/19kV | 500V/19kV | 500V/17.3kV | 500V/17.3kV | Full drift voltage and potential strips ON in big TPCs, 500V on sense wires, Gating Grid turned on. | (BL)|- Wed, 11.03.2026 21:41:17 | 600V/13kV | 600V/8.16kV | 600V/13kV | 600V/17.3kV | 600V/19kV | 600V/19kV | 600V/17.3kV | 600V/17.3kV | +100V on sense wires, now at 600V | (BL)|- Wed, 11.03.2026 22:48:02 | 700V/13kV | 700V/8.16kV | 700V/13kV | 700V/17.3kV | 700V/19kV | 700V/19kV | 700V/17.3kV | 700V/17.3kV | +100V on sense wires, now at 700V | (BL)|- Wed, 11.03.2026 23:48:39 | 800V/13kV | 800V/8.16kV | 790V/13kV | 800V/17.3kV | 800V(SR)/740V(HR)/19kV | 800V(SR)/740V(HR)/19kV | 800V/17.3kV | 800V/17.3kV | +100V except MTPC HR and VTPC2. MTPC and VTPC2 now at 300V below nominal, going to hold there overnight. | (BL)|- Thu, 12.03.2026 00:07:56 | 900V/13kV | 850V/8.16kV | 790V/13kV | 850V/17.3kV | 800V(SR)/740V(HR)/19kV | 800V(SR)/740V(HR)/19kV | 850V/17.3kV | 850V/17.3kV | +100V on VTPC1, +50V on small TPCs. All TPCs (except VTPC1 sectors 1, 4) are at 300V below nominal | (BL)|- Thu, 12.03.2026 15:41:21 | 950V(1,4)/900V/13kV | 850V/8.16kV | 790V/13kV | 850V/17.3kV | 800V(SR)/740V(HR)/19kV | 800V(SR)/740V(HR)/19kV | 850V/17.3kV | 850V/17.3kV | +50V on VTPC1 sectors 1, 4. Now all are at 300V below nominal | (BL)|- Thu, 12.03.2026 23:07:44 | 1050V(1,4)/1000V/13kV | 950V/8.16kV | 890V/13kV | 950V/17.3kV | 900V(SR)/840V(HR)/19kV | 900V(SR)/840V(HR)/19kV | 950V/17.3kV | 950V/17.3kV | +100V. Now all are at 200V below nominal | (BL)|- Fri, 13.03.2026 16:40:06 | 1100V(1,4)/1050V/13kV | 1000V/8.16kV | 940V/13kV | 1000V/17.3kV | 950V(SR)/890V(HR)/19kV | 950V(SR)/890V(HR)/19kV | 1000V/17.3k Wed, 11 Mar 2026 21:40:55 +0100 http://elog.czopowicz.pl/Experts+logbook/370 Mon, 9.03.2026 13:54:08 (AL): HV jumper settings: GRC-1 all SenseWires ON (low multiplicity setting -- unchanged), GRC-2 all SenseWires ON (low multiplicity setting -- changed). Gas pressure reducers: GRC-1,2 at about +0.5 bar above atmospheric pressure, both for Ar and for CO2. Gas flow: GRC-1,2 at 4.0 l/h : 0.8 l/h (Ar:CO2). Gas stability: checked stability of flow a few times with a few hours of waiting time. Gas safety bubbler: checked that the safety bubbler at the GRC inlet against overpressure is _not_ bubbling. Voltages: Udrift=-20V (the HV supply cannot issue active -0V), Usw=1600V. Isw(spill,target-out)=?nA, Isw(nospill,target-out)=?nA. Safety settings for SenseWire HV: HV max setting: Umax=1620V. HV ramp setting: DU/Dt(up)=11V/s, DU/Dt(down)=11V/s. HV trip setting: Imax=0.60uA, tmax=1s. Safety settings for Drift HV: HV max setting: Umax=-30V. HV ramp setting: DU/Dt(up)=5V/s, DU/Dt(down)=5V/s. HV trip setting: Imax=5uA, tmax=2s. Mon, 09 Mar 2026 13:53:23 +0100 http://elog.czopowicz.pl/Experts+logbook/369 [TABLE border="0" cellspacing="10"] | VTPC-1 | Gap TPC | VTPC-2 | FTPC 1 | MTPC-L | MTPC-R | FTPC 2 | FTPC 3 | | |- Tue, 28.10.2025 20:11:26 | 500V/13kV | 500V/8.16kV | 500V/13kV | 500V/17.3kV | 500V/19kV | 500V/19kV | 500V/17.3kV | 500V/17.3kV | Full drift voltage and potential strips ON in big TPCs, 500V on sense wires, Gating Grid turned on. | (BL)|- Wed, 29.10.2025 17:13:30 | 600V/13kV | 600V/8.16kV | 600V/13kV | 600V/17.3kV | 600V/19kV | 600V/19kV | 600V/17.3kV | 600V/17.3kV | +100V on sense wires, now at 600V | (BL)|- Fri, 31.10.2025 10:08:18 | 700V/13kV | 700V/8.16kV | 700V/13kV | 700V/17.3kV | 700V/19kV | 700V/19kV | 700V/17.3kV | 700V/17.3kV | +100V on sense wires, now at 700V | (BL)|- Fri, 31.10.2025 10:58:55 | 800V/13kV | 800V/8.16kV | 800V/13kV | 800V/17.3kV | 800V/19kV | 800V/19kV | 800V/17.3kV | 800V/17.3kV | +100V on sense wires, now at 800V | (BL)|- Fri, 31.10.2025 11:46:14 | 900V/13kV | 900V/8.16kV | 890V/13kV | 900V/17.3kV | 900V(SR)/840V(HR)/19kV | 900V(SR)/840V(HR)/19kV | 900V/17.3kV | 900V/17.3kV | up to +100V on sense wires, VTPC2 and MTPCs now at 200V below nominal | (BL)|- Fri, 31.10.2025 12:21:13 | 1000V/13kV | 980V/8.16kV | 890V/13kV | 980V/17.3kV | 900V(SR)/840V(HR)/19kV | 900V(SR)/840V(HR)/19kV | 950V/17.3kV | 950V/17.3kV | up to +100V on sense wires, All TPCs except VTPC1 sectors 1,4 now at 200V below nominal | (BL)|- Fri, 31.10.2025 13:11:55 | 1075V(S1,4)/1050V(S2,3,5,6)/13kV | 1030V/8.16kV | 940V/13kV | 1030V/17.3kV | 950V(SR)/890V(HR)/19kV | 950V(SR)/890V(HR)/19kV | 1000V/17.3kV | 1000V/17.3kV | +50V on sense wires (+75 for VTPC1 S1,4) to begin gradual raise to nominal voltages. | (BL)|- Fri, 31.10.2025 13:33:14 | 1150V(S1,4)/1100V(S2,3,5,6)/13kV | 1080V/8.16kV | 990V/13kV | 1080V/17.3kV | 1000V(SR)/940V(HR)/19kV | 1000V(SR)/940V(HR)/19kV | 1050V/17.3kV | 1050V/17.3kV | +50V on sense wires (+7 Tue, 28 Oct 2025 20:08:28 +0100 http://elog.czopowicz.pl/Experts+logbook/368 Mon, 27.10.2025 10:31:24 (AL): HV jumper settings: GRC-1 all SenseWires on (low multiplicity setting -- unchanged), GRC-2 all SenseWires on (low multiplicity setting). Flow: GRC-1,2 at 4.0 l/h : 0.8 l/h (Ar:CO2). Voltages: Udrift=-20V (the HV supply cannot issue active -0V), Usw=1600V. Isw(spill,target-out)=?nA, Isw(nospill,target-out)=?nA. Safety settings for SenseWire HV: HV max setting: Umax=1620V HV ramp setting: DU/Dt(up)=11V/s, DU/Dt(down)=11V/s. HV trip setting: Imax=0.60uA, tmax=1s. Mon, 27 Oct 2025 10:31:25 +0100 http://elog.czopowicz.pl/Experts+logbook/367 [B]Single event[/B] - behavior: the board loses connection, it disappears from GECO or any other means of communication. In the log: single occurrence of [CODE][System] live inserted/removed board;[/CODE] [B]Double event[/B] - behavior: the board does not disappear (probably disappears for a short moment and reappears after short time. After reappearing, channels are off. In the log: double occurrence of [CODE][System] live inserted/removed board;[/CODE] in short interval. Most frequently the interval is around 4 seconds. 31.07.2025, 13:26 - double event - unknown board (log was configured wrongly) 2.08.2025, 1:50 - single event - log was still configured wrongly, but it is clear it happened to module 14 9.08.2025, 10:15 - double event - most probably board 8 (because no channels were on for the test) After this event I turned on three dummy channels on board 8 (8.03-8.07). They are not connected to anything, V0set is at 0. In case of the crash they should go off. 18.08.2025, 3:25 - single event - board 8 After this event I replaced front power supply module with the one from the spare crate from the Electronics Pool. 21.08.2025, 6:43 - double event - board 8 27.08.2025, 3:31 - single event - board 8 On 29.08.2025 Sasha replaced the mainframe with the one rented from Electronics Pool. 4.09.2025, 4:58 - single event - board 14 Sasha wanted to replace 24-channel board 8 to two 12-channel boards (8 and 9) borrowed from Electronics Pool. One of them was not working properly (constantly showing overcurrents). Just one board was installed and tests were started. On 10.09 I took the faulty 12-channel board to Electronics Pool. They replaced it with a good one. It was installed as board 9. Tests resumed. 23.09.2025 22:42 - single event board 14 The longest period without the failure. Board 14 crashed, but it could be expected as it is the second most frequently failing board with 24 channels. 1.10.2025 16:27 I replaced CPU module with the one borrowed from Electronics Pool (pr Sat, 02 Aug 2025 12:48:29 +0200 http://elog.czopowicz.pl/Experts+logbook/366 Mon, 07 Jul 2025 08:09:03 +0200 http://elog.czopowicz.pl/Experts+logbook/365 Target scan was performed: Estimated carbon target position: -17 mm Estimated H2O target position: 33 mm Estimated H20 empty target position: 83 mm Sat, 28 Jun 2025 15:52:43 +0200 http://elog.czopowicz.pl/Experts+logbook/364 V1 is now connected to 05.003. TOFF-32B is now connected to 06.006 Module 5 gives more current. Thu, 26 Jun 2025 16:40:34 +0200 http://elog.czopowicz.pl/Experts+logbook/363 [TABLE border="0" cellspacing="10"] | FTPC-1 | FTPC-2 | FTPC-3 | GTPC | |- Wed, 25.06.2025 13:25:18 | 0V/17.3kV | 0V/17.3kV | 0V/17.3kV | 0V/0kV | Setting up the drift voltages, except GTPC|- Wed, 25.06.2025 13:32:27 | 500V/17.3kV | 500V/17.3kV | 500V/17.3kV | 0V/0kV | 500V on sense wires, except GTPC|- Wed, 25.06.2025 13:37:14 | 500V/17.3kV | 500V/17.3kV | 0V/17.3kV | 0V/0kV | Switched off FTPC-3|- Wed, 25.06.2025 13:48:45 | 500V/17.3kV | 500V/17.3kV | 500V/17.3kV | 0V/0kV | 500V on sense wires FTPC-3 (FTPC-3 power supply channel was changed)|- Wed, 25.06.2025 13:56:19 | 600V/17.3kV | 600V/17.3kV | 600V/17.3kV | 0V/0kV | +100V in all chambers, except GTPC|- Wed, 25.06.2025 14:05:27 | 700V/17.3kV | 700V/17.3kV | 700V/17.3kV | 0V/0kV | +100V in all chambers, except GTPC|- Thu, 26.06.2025 14:38:55 | 600V/17.3kV | 600V/17.3kV | 600V/17.3kV | 0V/0kV | -100V in all chambers, except GTPC|- Sun, 29.06.2025 00:20:59 | 600V/17.3kV | 600V/17.3kV | 600V/17.3kV | 500V/8.16kV | Setting up drift voltage for GTPC -> 30m -> +500V on sense|- Sun, 29.06.2025 00:20:59 | 600V/17.3kV | 600V/17.3kV | 600V/17.3kV | 500V/8.16kV | Setting up drift voltage for GTPC -> 30m -> +500V on sense|- Sun, 29.06.2025 01:20:04 | 650V/17.3kV | 650V/17.3kV | 650V/17.3kV | 600V/8.16kV | +50 in FTPCs, +100 in GTPC|- Sun, 29.06.2025 01:36:53 | 700V/17.3kV | 700V/17.3kV | 700V/17.3kV | 700V/8.16kV | +50 in FTPCs, +100 in GTPC|- Sun, 29.06.2025 01:39:54 | 800V/17.3kV | 800V/17.3kV | 800V/17.3kV | 800V/8.16kV | +100V in all chambers|- Sun, 29.06.2025 01:45:27 | 850V/17.3kV | 850V/17.3kV | 850V/17.3kV | 850V/8.16kV | +50V in all chambers|- Sun, 29.06.2025 01:49:41 | 880V/17.3kV | 880V/17.3kV | 880V/17.3kV | 880V/8.16kV | +30V in all chambers|- Sun, 29.06.2025 01:55:14 | 910V/17.3kV | 910V/17.3kV | 910V/17.3kV | 910V/8.16kV | +30V in all chambers|- Sun, 29.06.2025 02:09:10 | 930V/17.3kV | 930V/17.3kV | 930V/17.3kV | 930V/8.16kV | +20V in all chambers|- Sun, 29.06.2025 Wed, 25 Jun 2025 13:11:05 +0200 http://elog.czopowicz.pl/Experts+logbook/362 [TABLE border="0" cellspacing="10"] | VTPC-1 | VTPC-2 | MTPC-L | MTPC-R | GRC-1 | |- Mon, 23.06.2025 14:17:18 | 0V(1,4)/0V/13kV | 0V/13kV | 0V(SR)/0V(HR)/19kV | 0V(SR)/0V(HR)/19kV | 0V/20V | Setting up the drift voltages|- Mon, 23.06.2025 14:32:59 | 500V(1,4)/500V/13kV | 500V/13kV | 500V(SR)/500V(HR)/19kV | 500V(SR)/500V(HR)/19kV | 500V/20V | 500V on sense wires, pot. up to 60V |- Mon, 23.06.2025 14:56:21 | 600V(1,4)/600V/13kV | 600V/13kV | 600V(SR)/600V(HR)/19kV | 600V(SR)/600V(HR)/19kV | 600V/20V | +100V in all chambers |- Mon, 23.06.2025 15:18:45 | 700V(1,4)/700V/13kV | 700V/13kV | 700V(SR)/700V(HR)/19kV | 700V(SR)/700V(HR)/19kV | 700V/20V | +100V in all chambers |- Mon, 23.06.2025 15:34:48 | 800V(1,4)/800V/13kV | 800V/13kV | 800V(SR)/800V(HR)/19kV | 800V(SR)/800V(HR)/19kV | 800V/20V | +100V in all chambers |- Mon, 23.06.2025 18:03:47 | 900V(1,4)/900V/13kV | 890V/13kV | 900V(SR)/840V(HR)/19kV | 900V(SR)/840V(HR)/19kV | 900V/20V | VTPC-2 and MTPCs are 200V below nominal [+100V -- VTPC-1, MTPCs(SR), GRC; +90V -- VTPC-2; +40V -- MTPCs(HR)]|- Mon, 23.06.2025 18:20:14 | 1000V(1,4)/1000V/13kV | 890V/13kV | 900V(SR)/840V(HR)/19kV | 900V(SR)/840V(HR)/19kV | 1000V/20V | VTPC-1(2,3,5,6) are 200V below nominal [+100V -- VTPC-1 and GRC] |- Mon, 23.06.2025 18:36:24 | 1050V(1,4)/1000V/13kV | 890V/13kV | 900V(SR)/840V(HR)/19kV | 900V(SR)/840V(HR)/19kV | 1100V/20V | VTPC-1(1,4) are 200V below nominal [+50V -- VTPC-1(1,4); +100V -- GRC] |- Fri, 27.06.2025 10:45:00 | 1050V(1,4)/1000V/13kV | 890V/13kV | 900V(SR)/840V(HR)/19kV | 900V(SR)/840V(HR)/19kV | 0V/20V | Ramped GRC down to change multiplicity (AD, RN) |- Fri, 27.06.2025 11:05:59 | 1050V(1,4)/1000V/13kV | 890V/13kV | 900V(SR)/840V(HR)/19kV | 900V(SR)/840V(HR)/19kV | 500V/20V | Ramping GRC back, first 500V (AD,RN)|- Fri, 27.06.2025 11:07:51 | 1050V(1,4)/1000V/13kV | 890V/13kV | 900V(SR)/840V(HR)/19kV | 900V(SR)/840V(HR)/19kV | 1000V/20V | Ramping GRC back +500V (AD,RN)|- Fri, 27.06.2025 11:11: Mon, 23 Jun 2025 14:01:56 +0200