2010/04/30
| Cooldown checkout sheet (rev C SQUET) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Detector: | G9 | BH: | ||||||
| SC: | Z13 1-6 | RT | LN | |||||
| Face: | 5 | Date | 2010-04-30 | Date | 2010-05-03 | |||
| SQUET: | ZC15 | Who | JZ | Who | JZ | |||
| Signal | Pos. lead | Gnd lead | Nominal | Actual | Chassis | Nominal | Actual | Chassis |
| (Gnd lead) | (Gnd lead) | |||||||
| Nominal: | Nominal: | |||||||
| < 0.1 nS | < 0.1 nS | |||||||
| Phonon | ||||||||
| SQUID bias A/Ret | 4 | 20 | 3 - 5 k | 5 | OK | 1 - 2 k | 2 | OK |
| SQUID bias B/Ret | 19 | 34 | 4.6 | OK | 1.7 | OK | ||
| SQUID bias C/Ret | 8 | 24 | 4.2 | OK | 1.5 | OK | ||
| SQUID bias D/Ret | 23 | 39 | 4.1 | OK | 1.5 | OK | ||
| Feedback A/Ret | 37 | 21 | 15 - 25 k | 21.1 | OK | 9 - 13 k | 8.4 | OK |
| Feedback B/Ret | 2 | 18 | 18.7 | OK | 7.4 | OK | ||
| Feedback C/Ret | 41 | 25 | 17.7 | OK | 7 | OK | ||
| Feedback D/Ret | 22 | 6 | 17.4 | OK | 6.8 | OK | ||
| QET A/Ret | 3 | 1, 13, 14, 17, 32 | 60 - 80 | 73.8, 72.3, 69.7, 70.1, 69.6 | OK | 30 - 40 | 37.6, 37.2, 34.4, 34.9, 34.6 | OK |
| QET B/Ret | 35 | 29, 33, 47, 48 | 69.6, 69.6, 70.8, 69.9 | OK | 34.7, 34.6, 35.7, 34.7 | OK | ||
| QET C/Ret | 7 | 5, 9, 10, 28 | 68.2, 68.2, 61.0, 68.1 | OK | 33.7, 33.6, 26.7, 33.4 | OK | ||
| QET D/Ret | 38 | 36, 40, 43, 44 | 68.3, 68.5, 68.3, 68.5 | OK | 34.7, 34.7, 34.4, 34.6 | OK | ||
| Charge | ||||||||
| FET heater +/- | 45 | 46 | 1.0 - 1.1 k | 1.1k | OK | 1.0 - 1.1 k | 1.053 | OK |
| Qi bias/QET Ret | 15 | 24 - 26 nS | 38.3MOhm | OK | < 1 nS | OK | OK | |
| Qo bias/QET Ret | 11 | 38.1MOhm | OK | OK | OK | |||
| Qi feedback/Drain/Source | 50 | 16, 31 | 15 - 17 nS | 42.9MOhm, 42.9MOhm | OK | 6 - 8 nS | 48.5MOhm, 48.6MOhm | OK |
| Qo feedback/Drain/Source | 30 | 12, 27 | 42.6MOhm, 42.6MOhm | OK | 48.6MOhm, 48.5MOhm | OK | ||
| Qi drain | 16 | chassis | < 0.1 nS | – | OK | < 0.1 nS | – | OK |
| Qo drain | 12 | chassis | – | OK | – | OK | ||
| Qi source | 31 | chassis | – | OK | – | OK | ||
| Qo source | 27 | chassis | – | OK | – | OK | ||
| FET Tsense +/FET heater- | 49 | 46 | 0.6 - 0.7 V | 0.711 | OK | 0.9 - 1.0 V | 1.08 | OK |
| LED 1 | chassis | 42 | 1.0 - 1.1 V | 1.132 | – | 1.2 - 1.5 V | 1.5 | – |
| LED 2 | chassis | 26 | 1.123 | – | 1.5 | – | ||
| 10:32 | Start He3 and He4 pump, pump mixture into dump |
|---|---|
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| 11:13 | Close gate valve, condenser speedivalve, V1, and V6 |
|---|---|
| 11:25 | Fill N2 cold trap full, warming up leak checker |
| 11:27 | Close V9, Open V4, V12B, V13B to cool the mixture |
| 11:32 | Open V14, open V6 to 13.2% |
| 11:37 | Close and open V13B to see if there is mixture passing through V6 |
| 11:39 | Increase V6 to 13.5%, clean the mixture |
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| 17:02 | At 1.2×10-5 mbar isolate pumping station and check the background He level |
| 17:06 | IVC background He level: 7.2×10-10 cc/s |
| 17:09 | Isolate leak checker and continue pumping IVC |