2021/08/20 (Friday)
- Lab in-personnel: Giulia and Matt
| Status | Run 74 in progress. First cooldown after IVC rebuild. |
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| Tower thermometer is reading high, probably this is a thermometer problem and the actual temperature is much lower. High noise in some of the charge channels. | |
| Setup: DIB1/2+acc → SL 41/43 → 3.2 MHz filters → cables 2/3 → nothing/Source_mover_board+HV_diverter_board → DCRC50(3)/55(1). Kepco 40V supplye → HV BNC. Lead shield erected, 4 walls. Currently both DCRCs are on. | |
| Position of Am source: y = 0.0 mm | |
| 0741 | Start 45 min series of +9V/0V (bias applied after 60 sec), with 1000 beginning randoms, trigger threshold 60/35/50/120 on DCRC3qI/qO/DCRC1qI/qO, 5Hz in-run randoms, with 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Use Sequencer script r74_takeandflash_dcrcbias.msl. This flashes for 30 seconds at end of series. |
| 0750 | Tower = 98.7 mK |
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| 07210820_0741 |
| 0855 | Tower/MC/Coldplate = 120.7/40.4/192 mK, Still = 1.33 K / 0.070 mbar / 0 mW, G1/G2= 280.7/260.4 mbar, 1K Pot = 1.59 K / 20±1 mbar. MB = 40.3%. |
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| 0902 | Fill LN2 cold bath. |
| 0904 | At 10kHz noise in DCRC3qI/qO/DCRC1qI/qO = 8.8/1.7/1.2/19 8e-6. This is q3/q1/q4/q2 At 3kHz (peak) noise in DCRC3qI/qO/DCRC1qI/qO = 86/13/22/260 e-6. |
| Noise is lower athn yesterday. | |
| 1037 | Start 45 min series of +8V/0V (bias applied after 60 sec), with 1000 beginning randoms, trigger threshold 70/40/40/150 on DCRC3qI/qO/DCRC1qI/qO, Use Sequencer script r74_takeandflash_dcrcbias.msl. This flashes for 30 seconds at end of series. |
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| 07210820_1037 |
| 1215 | Start 45 min series of +7V/0V (bias applied after 60 sec), with 1000 beginning randoms, trigger threshold 70/40/40/150 on DCRC3qI/qO/DCRC1qI/qO, 5Hz in-run randoms, with 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Use Sequencer script r74_takeandflash_dcrcbias.msl. This flashes for 30 seconds at end of series. |
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| 1220 | Tower = 98.1 mK |
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| 07210820_1215 |
| 1324 | Start 45 min series of +6V/0V (bias applied after 60 sec), with 1000 beginning randoms, trigger threshold 70/40/50/150 on DCRC3qI/qO/DCRC1qI/qO, 5Hz in-run randoms, with 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Use Sequencer script r74_takeandflash_dcrcbias.msl. This flashes for 30 seconds at end of series. |
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| 07210820_1324 |
| 1433 | Begin LHe transfer @ MB = 32.2 % |
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| 1512 | End LHe transfer @ MB = 89.5 % |
| 1633 | Start 45 min series of +9.5V/0V (bias applied after 60 sec), with 1000 beginning randoms, trigger threshold 160/80/40/290 on DCRC3qI/qO/DCRC1qI/qO, 5Hz in-run randoms, with 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Use Sequencer script r74_takeandflash_dcrcbias.msl. This flashes for 30 seconds at end of series. |
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| 07210820_1633 |