UMN CDMS Wiki archive
start › cdms › k100 › run_diary › 20120813

2012/08/13

1005 Fed Cricket 3 pellets.
1040 Filled LN2 cold trap.
1209 Background leak rate in IVC: 7.1E-6 cc/s. Did a spray test around the top of the fridge on the lines leading to IVC and no apparent leak in those lines.
1349 Open turbo pump and leak checker to IVC. Start 1K pot again.
1612 Began LHe Transfer (19.2%)
1705 Finished condensing mixture (started a little while before beginning of LHe transfer).
1715 End LHe transfer (65.2%).
When pulling out the transfer stick, the leak checker went off. The rate spiked up to 5.5E-8 cc/s from the the previous stable value of 5E-9 cc/s. It's now stabilizing around 1E-8 cc/s.
1728 Begin circulation. G1 and G2 before circulation were ~ 47 mbar.
1735 Fed Cricket 4 pellets.
1901 Nearing end of circulation process. Leak rate has leveled out to 4E-9 cc/s.
1959 Ended automatic circulation process about 20 minutes ago. Opened V14 to bleed out some mixture. Temperature is ~ 87 mK.
Filled LN2 cold trap.