 15 Nov 2019 23:54, Yi Wang, Procedure/Operation, Cooling System, open dewar refill
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| 08:50 am open dewar refill to full |
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17 Nov 2019 00:45, Yi Wang, Procedure/Operation, Cooling System, open dewar refill
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| 09:45 am open dewar refill to full, TPC pressure 31 mbar |
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12 Nov 2019 00:48, Yi Wang, Procedure/Operation, Cooling System, morning system monitoring
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09:47 Heat gun ON, TPC pressure 261 mbar, recirculation pressure 252 mbar
11:00 Building 182 liquid argon tower refiiled
11:20 Refill open dewar to 70/120 cm |
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07 Nov 2019 05:19, Yi Wang, Procedure/Operation, Cooling System, fast recirculation
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08:40, switch on heat gun, open dewar liquid level 50/120 (cm)
16:30, open dewar is refilled to 70/120 (cm)
21:40, switch off heat gun, open dewar liquid level 60/120 (cm) |
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05 Nov 2019 10:56, Yi Wang, Procedure/Operation, Cooling System, fast re-circulation
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Nov 04 in the morning, start using heat gun to blow the liquid argon in the open dewar, in order to rise the pressure difference between the TPC
and the condenser.
Nov 04 fast circulating for 7 hours, pressure difference ~90 mbar |
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06 Nov 2019 00:33, Yi Wang, Procedure/Operation, Cooling System, fast re-circulation
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Start at 09:35 am, open dewar liquid level 40/120
Stop at 08:20 pm, for the evening data taking |
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11 Nov 2019 04:08, Yi Wang, Problem, Cooling System, Possible power blackout on Nov 9
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There was a possible power blackout on Nov 9 from 2 am to 4 am at builidng 182.
During the blackout, the vacuum pump for pumping the insulation vacuum of the cryogenic system was OFF.
Moistures were accumulated in the interlayer during these two hours, and now the vacuum insulation is not as good as before. |
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18 Nov 2019 02:04, Yi Wang, Procedure/Operation, Cooling System, Open dewar refill
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| 9:00 am open dewar refilled to full, TPC pressure 30 mbar |
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08 Nov 2019 00:28, Yi Wang, Procedure/Operation, Cooling System, Morning system monitoring
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09:29 Heat Gun ON
09:30 TPC 259 mbar Recirculation 257 mbar
10:03 TPC 382 mbar Recirculation 326 mbar |
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09 Nov 2019 01:37, Xiang Xiao, Procedure/Operation, Cooling System, Morning system monitoring
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10:20 Heater gun on
10:20 TPC 230 mbar Recirculation 241 mbar
10:59 TPC 391 mbar Recirculation 345 mbar |
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10 Nov 2019 00:25, Yi Wang, Procedure/Operation, Cooling System, Morning system monitoring
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09:25 Heat gun ON
09:40 TPC pressure 241 mbar, recirculation pressure 231 mbar
10:45 TPC pressure 327 mbar, recirculation pressure 301 mbar |
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11 Nov 2019 00:39, Yi Wang, Procedure/Operation, Cooling System, Morning system monitoring
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09:39 heat gun on
12:37 TPC pressure 350 mbar, recirculation pressure 338 mbar
13:50 TPC pressure 336 mbar, recirculation pressure 315 mbar |
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13 Nov 2019 00:26, Yi Wang, Procedure/Operation, Cooling System, Morning system monitoring
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09:30 Heat Gun ON
09:40 TPC pressure 293 mbar, recirculation pressure 277 mbar
10:20 open dewar refill to 70/120 cm |
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16 Nov 2019 00:12, Yi Wang, Procedure/Operation, Cooling System, Gas pocket formation
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09:12 am MB OFF, LED ON, start forming gas pocket
10:46 am Gas pocket 7mm thick, LED OFF, MB ON |
02 Nov 2019 11:44, Alex Kish, Procedure/Operation, Cooling System, Forcing recirculation 
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Argon refills of the open bath are suspended in order to increase the deltaP between the TPC and the recirculation vessel, in order to force gas recirculation
through the oxygen-sorption filter. The goal is to see S2 signal.
Currently the pressure is stable, fluctuations seezed over night. DeltaP very low, ~5 mbar. |
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08 Nov 2019 05:39, Edgar Sanchez, Procedure/Operation, Cooling System, Afternoon system monitoring
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14:00 TPC 330 mbar Recirculation 290 mbar. Liquid argon level in bath 65 cm
15:00 TPC 335 mbar Recirculation 300 mbar.
16:11 TPC 373 mbar Recirculation 333 mbar. |
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10 Nov 2019 05:34, Edgar Sanchez, Procedure/Operation, Cooling System, Afternoon system monitoring
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14:34 TPC pressure 300 mbar , recirculation pressure 287 mbar
15:00 Heaters off for S1 data taking
15:30 TPC pressure 350 mbar , recirculation pressure 340 mbar |
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12 Nov 2019 05:47, Edgar Sanchez, Procedure/Operation, General, Afternoon system monitoring
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14:47 TPC pressure 330 mbar Recirculation pressure: 290 mbar
15:35 TPC pressure 345 mbar Recirculation pressure: 300 mbar
16:35 TPC pressure 440 mbar Recirculation pressure: 400 mbar |
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09 Nov 2019 06:35, Sam Hill, Procedure/Operation, Cooling System, Afternoon system monitoring
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15:36 TPC 320 mbar Recirculation 320 mbar
16:01 TPC 313 mbar Recirculation 313 mbar
16:31 TPC 235 mbar Recirculation 225 mbar |
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11 Nov 2019 10:15, Sam Hill, Procedure/Operation, Cooling System, Afternoon system monitoring
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Checked pressure regularly, steadily climbed from 15:00-19:00
19:00: TPC: 461 mbar Recirculation 397 mbar
19:23: Dewar Level 40cm |