2017/01/04 (Wednesday)
| Status: IVC open, tower removed. Main bath vacuum jacket is evacuated. 1K Pot needle valve closed. LN2 traps clean. Mixture is in dump, fridge evacuated. | |
| 1235 | Disassemble source holder, because I want to drill a hole in the plate as a window for LEDs. This plate is the one designed for three large Am sources and one small - it is therefore obsolete because we only have two large ones. |
| 1250 | Attach four LED boards to plate  |
| 1310 | Drill 0.375“ hole in source holder plate, as window for LED light. Hole is centered about 1.7 cm from one edge of the hexagon, about 3.2 cm from the center   |
| 1340 | Assemble source holder plate and LED plate into housing  Note that LEDs are arranged sort-of near the hole. |
| 1345 | Remove S101 from purge cabinet for stack assembly |
| 1400 | Remove detector crown from detector, scotch brite contact surfaces on crown and tower spool, attach crown to spool.  |
| 1415 | Place detector on tower with DIB1 oriented to Tower Face 1, place source holder on top of detector with LED window opposite DIB1 Note: a wirebond looks popped. We will now do a quick electrical check to see whether repairs are necessary. |
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| Source/LED housing is arranged so that the LED window is opposite DIB1, since there are functioning LEDs on DIB1. |
| 1423 | Electrical check concerns - DIB1pB short to chassis = 38 ohms, specifically pin4 to chassis = 2 ohms (top side of detector). DIB4 pin 4 short to chassis = 4 ohms (bottom side of detector). |
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| 1437 | While trying to push the wire bonds around a little, broke the wire bond for DIB4 pin 4. DIB1 pin 4 now seems to not be shorted. |
| 1450 | Return S101 to purge cabinet. Will need to repair DIB4 pin4 bond with the wirebonder. (This is one of the longest bonds, not surprising that it's a problem.) (Note this is TES0, Side1pF, center of Side1. We certainly don't want to sacrifice the channel.) |