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2014/06/11

0205 Commence data acquisition: 1-hour flash followed by 30-minute cooldown. Acquire ionisation-only data in following order: -/+1 V; +/-1 V; -/+2 V; +/-2 V; -/+3 V; +/-3 V; -/+4 V; +/-4 V; -/+6 V; +/-6 V; -/+8 V; +/-8 V; -/+10 V; +/-10 V; -/+12 V; +/-12 V. OR trigger on charge channels at 40 ADC bins threshold.
0215 Fill N2 cold trap full.
0235 Place Ba-133 source back in safe.
1345 Fill LN2 cold trap full.
Tc measurements finished. Pump mixture to dump and begin warm up process.
Transition temperatures measured while cooling from normal resistance to superconducting. Temperatures listed below:
DIB 1 (DCRC 33) Normal to Transition Temperature [mK] Transistion to Superconducting Temperature [mK]
A 81.7 81.2
B 81.7 81.2
C 139.0 120.0
D 79.1 78.0
DIB 2 (DCRC 31)
A 75.0 72.1
B 73.5 71.5
C 76.7 76.0
D 77.7 76.0
DIB 3 (DCRC 50)
A 76.1 71.9
B 81.8 76.7
C 79.9 73.8
D 81.7 77.7
1540 Lower dewar. The end of an era.