 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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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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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 |
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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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15 Nov 2019 00:14, Yi Wang, Procedure/Operation, Cooling System,
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Nov 14, 2019
5:00 pm
Stop fast recirculation, fill open dewar to full |
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14 Nov 2019 00:34, E. Sanchez, Procedure/Operation, General,
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9:20 TPC pressure 235 mbar recirculation pressure 235 mbar. Gas pocket on. LED OFF. MB ON. LAr level 50 cm
10:20 TPC pressure 240 mbar recirculation 240 mbar
10:34 Heat gun ON
11:10 TPC pressure 375 mbar recirculation 330 mbar
11:17 Heaters OFF
11:19 Heat gun OFF |
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13 Nov 2019 05:32, Xiang Xiao, Procedure/Operation, Cooling System, Afternoon system monitoring
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14:31 TPC pressure 317 mbar, recirculation pressure 276 mbar
15:00 TPC pressure 328 mbar, recirculation pressure 285 mbar
15:31 TPC pressure 348 mbar, recirculation pressure 305 mbar
15:58 TPC pressure 346 mbar, recirculation pressure 297 mbar
16:29 TPC pressure 344 mbar, recirculation pressure 294 mbar
17:01 TPC pressure 359 mbar, recirculation pressure 303 mbar
17:13 Heat gun off, MB off, LED on, Gas bubble exists
17:18 Start refilling condenser
17:32 Stop refilling condenser, TPC pressure 274 mbar, recirculation pressure 260 mbar
18:05 TPC pressure 256 mbar, recirculation pressure 237 mbar
18:13 LED off, MB on
18:30 TPC pressure 257 mbar, recirculation pressure 206 mbar
18:52 TPC pressure 256 mbar, recirculation pressure 257 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
10:24 TPC pressure 264 mbar, recirculation pressure 241 mbar
13:40 TPC pressure 313 mbar, recirculation pressure 284 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
16:43 Heat gun off
18:04 TPC pressure 230 mbar Recirculation pressure: 230 mbar
18:55 TPC pressure 250 mbar Recirculation pressure: 250 mbar
Bubbler 8.4 V 5.1 mA
LAr bath level 55 cm
MB OFF
LED ON |
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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
11:36 TPC pressure 218 mbar, recirculation pressure 214 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
19:23: Refill open dewar
19:33: Dewar leve 60cm, TPC pressure 201 mbar Recirculation pressure 201 mbar |
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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.
This causes some bubbles generating in the liquid delivery bellow and significantly reduces the fast recirculation speed. |
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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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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
16:24 TPC pressure 330 mbar , recirculation pressure 320 mbar
17:20 TPC pressure 380 mbar , recirculation pressure 320 mbar
18:28 TPC pressure 365 mbar , recirculation pressure 305 mbar
18:40 Heaters on to generate gas pocket
19:31 TPC pressure 345 mbar , recirculation pressure 285 mbar
19:34 Heat gun off. Condenser refilled
20:14 TPC pressure 250 mbar , recirculation pressure 240 mbar
21: 42
TPC pressure (mbar): 230
Recirculation pressure (mbar): 220
Open dewar level ( cm/120cm): 55 cm
Bubbler: 8.56 V current : 5.1 mA
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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
11:34 TPC pressure 318 mbar, recirculation pressure 289 mbar
12:08 TPC pressure 322 mbar, recirculation pressure 286 mbar
13:54 TPC pressure 300 mbar, recirculation pressure 288 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
17:02 TPC 259 mbar Recirculation 258 mbar
17:33 TPC 270 mbar Recirculation 261 mbar
18:06 TPC 322 mbar Recirculation 319 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
11:28 TPC 419 mbar Recirculation 360 mbar
11:59 TPC 425 mbar Recirculation 366 mbar
12:24 Refill open dewar to 80/120 cm
12:31 TPC 389 mbar Recirculation 344 mbar
13:02 TPC 98 mbar Recirculation 99 mbar
13:30 TPC 204 mbar Recirculation 198 mbar
14:01 TPC 292 mbar Recirculation 294 mbar
14:30 TPC 231 mbar Recirculation 223 mbar
14:57 TPC 286 mbar Recirculation 284 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.
17:26 TPC 330 mbar Recirculation 280 mbar.
18:21 TPC 330 mbar Recirculation 280 mbar.
19:10 Heat gun off
20:40 TPC 225 mbar Recirculation 225 mbar.
21:46 TPC 238 mbar Recirculation 242 mbar.
Bubbler: 8.5 V, 5.2 mA
External LAr level: 60 cm
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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
10:31 TPC 421 mbar Recirculation 333 mbar
11:06 TPC 465 mbar Recirculation 373 mbar
11:21 refil condenser, refill open dewar to 70/120 cm
11:37 TPC 311 mbar, Recirculation 274 mbar
12:01 TPC 261 mbar, Recirculation 249 mbar
13:07 TPC 292 mbar, Recirculation 264 mbar
13:33 TPC 310 mbar, Recirculation 276 mbar |
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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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