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2013/09/26

1126 Leak checker turned on. IVC Pressure at 1.4E-4 mbar.
1330 Leak check performed on IVC flanges with background rate of 1.74E-9 mbarl/s. No spikes occurred to suggest a leak. Rate rose steadily to 1.9E-9 mbarl/s during the test, though this is likely due to the overall increase in He background and not due to a leak.
1745 Dewar raised, evacuated main bath and filled with He to perform a leak check with background rate of 1.6E-9. No leak detected. Filled IVC with 4.6 mbar Nitrogen exchange gas. Started N transfer.
1933 Perform electrical checkout S11C.
S11C Electrical Checkout

QET A to return: 242.4 Ω
QET B to return: 772 Ω
QET C to return: 731 Ω
QET D to return: 314 Ω
Qi to Qo: 142.5 kΩ
Qo to Qi: 127.6 kΩ
LED1 (to chassis): 746 kΩ: 1.055 V: <0.3 nS
LED2 (to chassis): 743 kΩ: 1.056 V: <0.7 nS

1955 Nitrogen transfer level meter reads 1.3 kΩ. Cease Nitrogen transfer.
2215 Fill LN2 cold trap full, begin cryocleaning mixture through cold trap 1.