2019/05/28 (Tuesday)
| Setup | DIB1/3/4 → 3.2 MHz filters 2/3/1 → cable 3/1/2 → gender changer ?/3/2 → HVConn 1/3/2 → HV 1/2 → DCRCX(4)/DCRC50(3) DCRC33(2) → 1kV power supply → HV input |
|---|---|
| 0000 | Tower = 65.7 mK |
| 0815 | Tower/MC/Coldplate = 64.2/31.9/199 mK, Still = 1.29 K / 0.095 mbar, G1/G2 = 171/164 mbar, 1K Pot = 1.63 K / 22 mbar. MB = 70.2% |
| Tower temperature continues to fall linearly, slowly | |
| 0950 | Turbo on IVC = 0.86 nbar. With Turbo valved out, IVC = 4.0 nbar after a few minutes. |
| 1000 | Isolate IVC and turbo pump, then unplug and remove Pfeiffer vacuum gauge from turbo pump manifold for cleaning. |
| 1020 | Fill LN2 cold trap bath |
| 1030 | MB = 67.0% |
| 1200 | During reassembly ignition aid of Pfeiffer vacuum gauge broke. Will attempt to solder back together |
| 1540 | MB = 59.6% |
| 1620 | Fill LN2 cold trap bath full |
| 1840 | Tower/MC/Coldplate = 62.4/34.0/131 mK, Still = 1.30 K / 0.095 mbar, G1/G2 = 166/164 mbar, 1K Pot = 1.63 K / 22 mbar. MB = 55.0% MC and Coldplate temperatures are clearly wrong here |