UMN CDMS Wiki archive
start › cdms › k100 › run_diary › 20130105

2013/01/05

1010 Fed Cricket 3 pellets.
1015 Filled LN2 cold trap.
P1 = 0.013 mbar; G1 ~ 1.1 mbar; G2 ~ 725.5 mbar.
Still missing about 4-5 mbar of mixture, and G1 had risen slightly. Also unsure of why it took so long to get this last 10 mbar out.
We're going to continue pumping out the lines during the LHe transfer just in case there is mixture left, though the pressures suggest there isn't anything left.
1050 Warmed up and calibrated leak checker. Evacuating main bath right now.
1054 Background leak rate: 2.2E-9 mbar l/s.
1100 Pumped and flushed main bath. No gross leak detected.
1104 Evacuated 1 K pot.
1119 Entered 0.054 mbar of He exchange gas into IVC.
1129 Begin slow He transfer (0%).
1300 Temperature starting to decrease (had increased to 100 K).
1652 Closed off dump. G2 ~ 725 mbar.
1724 Pump out He exchange gas at 10 K.
1947 Mixture cleaning re-commenced.
2000 Filled LN2 cold trap.
2015 Begin applying external gas pressure to the LHe dewar.
2105 End LHe transfer (78.3%).