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2018/01/25 (Thursday)

Previous Day

Status: All mixture in dump, fridge isolated. LN2 traps warm and pumped out. 1K Pot needle valve closed.
IVC completely removed. Stripline tube removed. Ebox and tubing from ebox to elbow removed. Old striplines removed.
1010 Insert stripline tube (wizard's staff) back in fridge. Bill Voje polished the scratched end. We put blue tape around the end as we raised it through the baffles. Took off the tape before pushing it through the o-ring at the top fringe flange. We pushed it up once, then pulled it down to see if there were any new scratches: there weren't. Possibly polishing the inside of the fridge port helped.
1030 Tie a washer to a 6-foot length of dental floss. Leave this on the fridge top. We'll tie it to the first stripline baffle after we get the striplines on the fridge top.
1300 Begin stripline install

Time lapse video of stripline installation, 13:02 to 15:32

1330 Fed striplines down the stripline tube, then placed the elbow in place, then pushed the stripline tube up from the bottom to engage the o-ring in the elbow.
1335 Striplines fed down through stripline tube. The bottom baffle slid down the striplines when pulling on the dental floss - we had to reattach it. Also the striplines buckled between the bottom baffle and the tape lower down, so we removed and replaced the tape.
1335 Warm ends of striplines laid on top of fridge stand. The bottom baffle was taped to the bottom of the stripline tube to keep the striplines from falling further through.
1345 Polished the upper 100mK can. Reattached stripline connector protector plates, temporarily.
1345 Fed striplines through elbow-to-Ebox tubing.
1405 Fed striplines through ebox. Connected o-ring clamps at elbow, t-intersection to pumpout, back of Ebox.
1415 Striplines too short to not use rerouting boards. So we decided to remove all the rerouting wires and flip the switches to connect all traces.
1420 Stripline 19 rerouting board, before removing wires.
1420 Stripline 20 rerouting board, before removing wires.
1420 Stripline 27 rerouting board, before removing wires.
1430 Remove wires from the three warm-end rerouting boards and switch all switches to ON
1500 Install upper IVC. (1.5mm indium on top flange, 1mm indium on stripline flange.) As usual removed the stripline protectors to feed them through IVC port - these seem like a tighter fit than the last ones.
1515 Attach upper stripline heatsink, 2 inches below bottom baffle.
1520 Connect striplines at Ebox. Left to right: 41, 43, 48.
1530 Reattach stripline protector plates. Thinking about reinforcements at the end near the plates, perhaps several layers of tape on the striplines then taped securely to the copper plate.

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