2021/01/19 (Tuesday)
- Lab in-person: Matt
- Virtual partner: Zach
| Status | Run 74 prep. 1K Pot pumped out and isolated. Fridge and 4He and LN2 Trap 1 isolated, not pumped out. Cryostat vacuum jacket pumped out. IVC open, tower removed. |
|---|---|
| 1215 | Matt enters lab, attends 12:15-13:00 meeting |
| 1300 | Tape down wires for source mover motor coil stripline to straighten them out, in preparation to extend the stripline tape.  |
| 1310 | Extend stripline tape on motor coil wires, leaving a small amount of wire left to solder. Also trim the extended piece of wire I put on last week so the two are about the same length.  |
| 1320 | Cut a new 4-pin millmax connector, and trim the solder posts a little so it doesn't stick out as much.  |
| 1330 | Finish soldering all four motor wires to connector  |
| 1330 | Tape over solder connections and connector plastic with the thicker Kapton tape. Try to establish a curve/bend at the end so it doesn't bow out as much.  |
| 1345 | Put source housing back on stack, then connect motor (pins 1-4), endstops (pins 5-6), and HV electrode (pin 9) wires to Face 4 of tower. Tape down wires.  |
| 1350 | Do Tower electrical check. Everything looks about the same as the previous check except that the motor coils got switched around in their pins. Also checked continuity between endstops and tower wiring. |
| 1400 | Finish Tower assembly by attaching and tightening five threaded rods  |
| 1420 | Bring tower into clean tent. Put tower stand on scissor jack, position under IVC, attach ring to bottom of IVC, then raise tower with jack as high as jack goes, then attach threaded rods and tighten nuts to support tower  |
| 1430 | Collapse jack, set it on top of red drill case, then raise it again to continue raising tower. Guide tower with fingers as it is raised and keep an eye on thermometer wire, striplines etc. Guide 600 mK rod out of the way of tower sections as tower is raised. Raise tower till almost in contact with 30 mK, tighten nuts to support it with tower stand, then remove jack and box.  |
| 1435 | Insert three screws into tower adapter to attach it to 30 mK can. Then remove tower stand.  Alignment: DIB1/accessories/DIB2 → Tower faces 2/4/5 → compass directions E/NW/W |
| 1440 | Perform electrical check, motor wires good :) HV electrode connection good. |
| 1455 | Plug in tower thermometer, check at LakeShore bridge, reads 1 kOhm - good. Tape wire down to 30 mK can. |
| 1500 | Matt exits lab. |