2020/12/11 (Friday)
- Lab in-person: Matt
- Virtual partner: Zach, Ruiren
| Status | Run 73 disassembly. 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. |
|---|---|
| Matt Fritts body temperature = 98.0 | |
| 1310 | Matt enters lab. Examine source mover holder. |
| 1330 | Notice that the screw terminals are hanging loose, no longer taped to source mover base plate.  |
| 1335 | Detach brass motor base plate from copper source mover base.   |
| 1340 | Unscrew motor, heat sink, and motor strap from brass motor base plate.   |
| 1345 | Wedge motor housing open with small screw driver in slot   |
| 1345 | Wedge open remaining motor parts to free both coils.   |
| 1350 | Cut NbTi coil wires free of epoxied heat sink connections.   |
| 1355 | Finish disassembling motor parts, free both coils.  |
| 1400 | Remove layers of yellow plastic tape and Teflon tape from first coil to expose the NbTi wire.  Note: the inner end is very short and can't be pulled out. It's clear that we will have to unwind the NbTi then rewind. |
| 1405 | Do the same to the second coil. Short end isn't quite as short but likely we need to unwind this one too.  |
| 1405 | Look at USD1 detector. It has two DIBs on opposite faces. 4 charge channels are wirebonded to qI and qO pins on each DIB, ground side is wirebonded to a phonon channel pin, can see continuity between these. Verify that there are 3 working LEDs on the DIBs.   |
| 1415 | Look at the stranded wire that the coil NbTi were soldered onto. It looks silvery, don't know what it is. But unlikely I guess that it's s/c material.  |
| 1420 | Leave clean room |
| 1450 | Unwinding one of the motor coils by hand onto a NbTi spool. Straightening some kinks along the way. |
| 1525 | Finished unwinding one motor coil.  |
| 1545 | Set up Nick's winding rig to unwind the other motor coil onto a spool. |
| 1600 | Finished unwinding second motor coil.  |
| 1615 | Matt leaves lab. |