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2021/10/29 (Friday)

Previous Day

  • Lab in-personnel: Matt, Himangshu, Zach, Giovanna, Giulia
Status Run 75 prep.
All mixture is in dump. Fridge isolated. 1K Pot isolated. LN2 Trap 2 still has contaminants in it. MB in pit, clean tent erected. Cryostat vacuum jacket (CVJ) pumped out. IVC open. Tower removed.
100 mK stage and 600 mK stage installed yesterday.
1330 Bring SQUET ZC-70 to wirebonder lab for modifications: reduce shunt on all four phonon channels to 6.7 mΩ. Wirebonder power 475/350, bond time 40/40. Scraped copper with hypodermic first.
1330 Tower installation: install 4K stage
1430 Begin installing SQUETs, choosing which stripline goes to which Tower face.
1445 Electrical check of all phonon-related lines on ZC-70, all good.
1530 Spent a long time straightening pins on interposer so that they would plug into a stripline. Used another interposer board to straighten the pins one row at a time, finally plugged the interposer into one of the old striplines on the bench. Then it was able to plug easily into a stripline.
1630 At Tower Face 5/2/3 plugged in SQUETs ZC-13/ZC-70/ZC-39+interposer plugged into Striplines 41/43/48

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