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2013/02/08

1000 Filled LN2 cold trap.
1045 Fed Cricket 4 pellets (mommy?!)
1050 Begin taking data. First flash for 6 sec, cool down for 20 min. Dib 1/2 biased at +/- 2V, 4V, 6V, 8V, 10V, 12V. At each bias there is a 30 min series, followed by 6 seconds of flashing and 20 minutes of cool down. End with 30 min of flashing, 30 min of cool down. Trigger on Qi/Qo on Dib 2 only at 40 ADC bins, respectively.
1350 Interrupted data taking (after 6 V) and circulation because pressures in G1 and G2 rose to 190, 170 mbar respectively and still increasing at ~ 1 mbar / min. Going to clean cold traps.
Closed gate and condenser valves.
Closed V13A. Opened V5.
1620 Closed off all valves on IGH. Stopped 1 K pot. Pulled out cold traps. Opened line between He-4 pump and cold traps. Begin pumping on cold traps as they warm up.
1814 Fed Cricket 4 pellets.
1816 Finished heating cold traps three times. Waiting for them to cool down.
1915 Closed all valves on IGH. Returned cold traps to their proper places.
1955 Started 1K pot, turned on He recovery, and opened Gate and Condenser valves.
Re-commence circulation by opening V1, 13A, and 12A. Opened V6 slowly until it was safe to open all the way.
2119 Mixing chamber temperature seems to be stabilizing around 50.0 mK. G1 and G2 are 45 and 42 mbar, respectively. P2 = 8.5 mbar; P1 = 0.065 mbar; 1K pot temperature ~ 1.58 K.
2135 Filled LN2 cold trap.
2141 Resume data taking from earlier. First flash for 20 min, then cool down for 60 min. Start taking data at +/- 8V, 10V, 12V. At each bias there is a 30 min series, followed by 6 seconds of flashing and 20 minutes of cool down. End with 30 min of flashing, 30 min of cool down. Trigger on Qi/Qo on Dib 2 only at 40 ADC bins, respectively. End with 30 min of flash and cool down.