2016/10/05 (Wednesday)
| Status: clean tent is up, ready for deinstall. IVC is filled to near 1 bar with N2 but should be topped off a bit. All mixture in dump. MB vacuum jacket has been pumped out. | |
| 0935 | Remove Cf source from on top of G101c in clean room and return source to safe |
| 1030 | Over-pressurize the IVC with N2 gas. Open IVC and being unistallation. |
| 1100 | Open IVC, remove 4K stage |
| 1335 | Put G101c in bag and remove from clean room. |
| 1350 | Remove 150mm tower. Before removing 150mm tower, undo the stripline buckle attached to the bottom of the 4K can. Without doing this, the wider detector cannot pass out of the 4K can. |
| 1400 | Remove G101c from bag in bonder lab, exposed in unclean environment for 35 minutes |
| 1430 | Remove 30mK can, then 4K can, and finally 100mK can. Place both 30mK can and 100mK can in anteroom. |
| 1435 | Rebonded the broken bond, Side1 DIB4 pBreturn → TES1. It looked like it may be touching another bond wire, but initial resistor checks are all around 100 Ω or so Wirebonder settings: Bond 1/2 Power = 480/480, Bond Times = 40/30, loop height = 50 mils, drop before clamp = 26 mils |
| 1500 | G101c in clean room for inspection |
Resistance checks after wirebonding, compare with Monday:
- DIB1 pA (pin2) seems to have broken, damn
- DIB4 pB = 128.0 Ω, c/w Matt Cherry measurement at SLAC = 125.8 Ω, seems to be fixed
- DIB4 pin3 to pin1,2,4 are between 125 and 136 Ω, so no obvious shorts
- all other measurements very close or 2-3 Ω higher than Monday readings
| 1525 | Return G101c to purge cabinet |
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| Views of repaired bond, Pin 3 on Side1 DIB4. Note that it is angled differently from the others. | |
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| Broken bond on Side1 DIB1 pin2, bond has come loose on detector side. |
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| 1605 | Before removing top of IVC, remove protector boards and buckle from striplines so that they can pass through the small flange on the bottom of the upper-4K stage. While doing this, realize that we did not remove the cold-end diverter boards from the striplines, so they're dirty now. Before we replace them, we'll have to wash them down w/ alcohol. Also remove top stripline buckle. |
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| 1649 | Remove top of IVC, and copper can covering the mixing chamber (place this can in anteroom with screws). Use kapton tape to secure striplines to their tube and bag up ends on striplines. |
| 1745 | Place Cf source inside purge cabinet for overnight activation of G101c. |
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