| | Run 74 prep. Tower partially installed. Still investigating last week's electrical checkout fail. |
| 1030 | Matt enters the lab |
| 1100 | Finish installing 100mK stage and attaching 600mK rod. Remembered to put the center cap on the tower this time before proceeding. |
| 1125 | Finish attaching 4K stage and attaching covers over unused tower faces 1, 3, 6. |
| 1135 | Tower electrical check. Looks good. All 5 electrodes show continuity and no short to chassis. Both motor coils show 7ish kOhm. |
| 1135 | Attach to DIB1/Face2/East SQUET ZC-13 and Stripline 41/Cable 2. Quick check at breakout box: looks OK, continuity between qI and qO, no shorts to chassis. |
| 1150 | Attach to DIB2/Face5/West SQUET ZC-39 and Stripline 43/Cable 3. Don't connect accessory plugs yet, then quick check of DIB1 at breakout box: looks OK. |
| 1155 | Attach to Face4/NorthWest accessory plugs (Stripline 43/Cable 3). Then quick check of DIB1 at breakout box: looks OK. |
| 1200 | Pause for group meeting |
| 1310 | Finish screwing in FET cards and SQUID cards. Everything attached except heat sinks. Do a quick check at the breakout box, both DIBs - not seeing any shorts to chassis from any of the charge bias lines. |
| 1350 | Finish attaching 4K heatsinks. Now for a full electrical checkout. |
| 1405 | Tower electrical checkout performed, everything looks OK [image not archived: biggrin.svg] |
| 1410 | Inspect inner rim of bottom of IVC for scratches. Found a couple possible scratches, buff these out a bit with ScotchBrite in a tangential direction, wipe with methanol. |
| 1430 | Remove most of the Q-compound from around the stripline elbow at the top of the fridge. |
| 1510 | Bottom IVC screws are partially tightened. Start pumping out IVC gently with Scroll Pump. Continue tightening screws. |
| 1530 | IVC has fallen below 0.1 mbar. Switch from Scroll pump to Turbo pump. |
| | IVC screws are mostly tightened, should tighten them more tomorrow. |
| 1530 | Turbo on IVC = 4.0 μbar |
| 1530 | Matt exits lab |