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2012/08/27

1015 Filled LN2 cold trap.
Fed Cricket 3 pellets
1117 Mixing chamber temperature 97.9 mK, still thermometer 4.40 kΩ, cold plate thermometer 13.8 kΩ. Pressures in P1, G1 & G2 are 0.14 mbar, 57 mbar & 67 mbar respectively. Temperature of 1 K pot is 1.71 K.
1126 Still resistance lower than normal 4.5 kΩ. Opened V14 to bleed out mixture. Closed V14 when it reached 80 mbar; G2 peaked at 127 mbar after being closed.
1130 MC temperature rose to 111 mK.
1350 Mixing chamber temperature 99.6 mK, still thermometer 4.40 kΩ, cold plate thermometer 13.9 kΩ. Pressures in P1, G1 & G2 are 0.13 mbar, 57 mbar & 65 mbar respectively. Temperature of 1 K pot is 1.71 K.
1358 Still resistance lower than normal 4.5 kΩ. Opened V14 to bleed out mixture. Closed V14 when it reached 80 mbar; G2 peaked at 127 mbar after being closed.
MC temperature rose to 113 mK.
1542 Mixing chamber temperature 101 mK, still thermometer 4.40 kΩ, cold plate thermometer 13.9 kΩ. Pressures in P1, G1 & G2 are 0.14 mbar, 59 mbar & 68 mbar respectively. Temperature of 1 K pot is 1.71 K.
1550 Still resistance lower than normal 4.5 kΩ. Opened V14 to bleed out mixture. Closed V14 when it reached 80 mbar; G2 peaked at 122 mbar after being closed.
MC temperature rose to 111 mK.
1730 Mixing chamber temperature 102 mK, still thermometer 4.40 kΩ, cold plate thermometer 14.1 kΩ. Pressures in P1, G1 & G2 are 0.14 mbar, 62 mbar & 71 mbar respectively. Temperature of 1 K pot is 1.71 K.
1739 Still resistance lower than normal 4.5 kΩ. Opened V14 to bleed out mixture. Closed V14 when it reached 80 mbar; G2 peaked at 117 mbar after being closed.
MC temperature rose to 111 mK.
1925 Mixing chamber temperature 103.4 mK, still thermometer 4.42 kΩ, cold plate thermometer 14.2 kΩ. Pressures in P1, G1 & G2 are 0.14 mbar, 65 mbar & 73 mbar respectively. Temperature of 1 K pot is 1.71 K.
1935 Bleed mixture out of dump. Pressure in G2 peaked at 116 mbar. Mixing chamber temperature reaches 111 mK.
2015 Fed Cricket 4 pellets.
2115 Mixing chamber temperature 103.7 mK, still thermometer 4.42 kΩ, cold plate thermometer 14.2 kΩ. Pressures in P1, G1 & G2 are 0.14 mbar, 64 mbar & 72 mbar respectively. Temperature of 1 K pot is 1.71 K.
Bleed mixture out of dump. Pressure in G2 peaked at 120 mbar. Mixing chamber temperature reaches 111 mK.
2300 Mixing chamber temperature 104.2 mK, still thermometer 4.41 kΩ, cold plate thermometer 14.2 kΩ. Pressures in P1, G1 & G2 are 0.14 mbar, 68 mbar & 75 mbar respectively. Temperature of 1 K pot is 1.71 K.
Bleed mixture out of dump. Pressure in G2 peaked at 113 mbar. Mixing chamber temperature reaches 111 mK.