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2016/08/23 (Tuesday)

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Setup: iZIP mode, DIB1/2/3 → 3.2 MHz filters → cables → DCRC55(1)/33(2)/50(3), Tower has been cooled below Al transition with mu-metal shield 43.9 cm below standard position
DCRCs powered overnight. Pumping on IVC with turbo pump overnight. Baked detector for 12 hours overnight, Tower at 0.4 K until 05:15.
0840 Tower/MC/Coldplate = 38.5/32.1/150 mK, Still = 1.25 K / 90 μbar, G1/G2 = 195/180 mbar, 1K Pot = 1.50 K / 3.8 mbar, MB = 39.2%.
Boiloff rate:
0845 Fill LN2 cold trap.
0840 Check phonon pulses, all look good, all baselines near -0.7 or -0.8.
0850 With DIB2 FETs turned off, Start three sets of 30min background series at -6/+6 V with FG=5/2/5, OG=8/3/8, with 1000 initial randoms, 1000 ending randoms. Trigger on DIB1 phA with threshold of 30ADC bins, with 150 us pileup cut window.
1220 Close V6 to begin warm up procedure. Isolate turbopump to let He in IVC accumulate.
Lower mu-metal shield to 37.8cm below standard height (should be an attenuation factor of 10).
1225 V6 closed, close V13B, turn off He3 pump, turn on MC Heater to 1.0mW. IVC = 5.4 nbar
1258 Tower temp = 1.3K. Temperature jumps up as usual to ~3K. IVC jumps to 250 nbar. G1 fell to a minimum of 25 mbar, now rising.
1310 Tower = 3.3K. IVC pressure = 300nbar. Begin turbopumping IVC. Turn off MC Heater to let tower start cooling.
1325 Tower = 2.4K and dropping. G1/G2 = 110mbar and dropping. Turn on He3 pump, close V13B, and begin opening V6.
1445 Tower = 335mK and dropping. Open V6 all the way.
1600 Tower = 40 mK. Raise mu-metal shield to standard position.
Detector has been cooled below Al transition with mu-metal shield 37.8cm below standard position
1535 Commence LHe transfer (29.3%).
1625 End LHe transfer (92.0%).
1630 Release pressure from main bath.
1655 All pulses looking good.
Release pressure from Main Bath.
1700 Fill LN2 cold trap full.
1728 Release pressure from main bath.
1738 Commence 12 hour bake.

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