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2021/09/20 (Monday)

Lab in-personnel: Giulia and Matt

Status	Run 74 in progress. First cooldown after IVC rebuild.
	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
1006	Tower/MC/Coldplate = 81.3/36.6/191.6 mK, Still = 1.38 K / 0.110 mbar / 0 mW, G1/G2= 312.9/296.7 mbar, 1K Pot = 1.56 K / 10±1 mbar. MB = 69.3%.
1012	Fill LN2 cold trap bath
1342	At 10kHz noise in DCRC3qI/qO/DCRC1qI/qO = 1.2/0.9/1.7/2.1 8e-6. This is q3/q1/q4/q2 At 3kHz (peak) noise in DCRC3qI/qO/DCRC1qI/qO = 3.2/1.0/2.7/6.7 e-6.
	Noise is considerably lower than yesterday.
1110	Start 45 min series of +8/0V data (bias applied after 60 sec), with 1000 beginning randoms, trigger threshold 30/25/30/50 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.

07210920_1110

1252	Start 6 series of +8/0V noise-only data with 1000 beginning randoms, each data series 1 minute only, starting at 0/3/6/9/13/19 minutes after bias applied. No triggers. With 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Use Sequencer script r74_noisewithbias_6series_dcrcbias.msl. This flashes for 30 seconds at end of series.
1348	Start 2 series of 0V / +10/0V noise-only data with 1000 beginning randoms, each data series 1 minute only, one before the bias applied and the next just after. No triggers. With 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Use Sequencer script r74_noiseBeforeAndAfterBias.msl. This flashes for 30 seconds at end of series.
1439	Start 2 series of 0V / +8/0V noise-only data with 1000 beginning randoms, each data series 1 minute only, one before the bias applied and the next just after. No triggers. With 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Use Sequencer script r74_noiseBeforeAndAfterBias.msl. This flashes for 30 seconds at end of series.
1511	Start 45 min series of +10/0V data (bias applied after 60 sec), with 1000 beginning randoms, trigger threshold 30/30/30/50 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.

07210920_1511. A bit weaker then two days ago

1643	Start 2 series of 0V / -10/0V noise-only data with 1000 beginning randoms, each data series 1 minute only, one before the bias applied and the next just after. No triggers. With 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Use Sequencer script r74_noiseBeforeAndAfterBias.msl. This flashes for 30 seconds at end of series.