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2016/10/11 (Tuesday)

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Status: Tower installed, 100mK stage almost finished. All mixture in dump. MB vacuum jacket has been pumped out.
0835 Remove Cf source from IVC and return source to safe
0855 Finish 100mK stage, attach 600 mK rod to ear on tower
0915 Attach 4K stage to IVC

Note on SQUET choice: should probably use the same ones from Run 59, ZC39, ZC13, ZC26, since we know their tuning parameters. Note that there are no channels connected to DIB3 pA & pD or DIB4 pA, so if there are any sub-par SQUET channels they should be mapped to those channels if possible.

1223 Attach SQUET ZC-13 to stripline 19/face 1 of tower, and attach SQUET ZC-39 to stripline 27/face 3 of the tower. Initial electrical check of DIB 1 (stipeline 19) shows that SQUID bias A to Return is open.
1240 Resistance check from breakout to cold end of stripline shows Stripline 19 SQUID RET A wire is broken.

Plan for rerouting Stripline 19: Bad wire = SQUID Return A. Reroute with good spare wire = QET A Return #3

  1. for SQUET-end rerouting card:
    1. add jumper from Pin 3 (SQUID Return A) to Pin 11 (QET A Return #3)
    2. break off Socket 11
  2. for D50-end rerouting card:
    1. jump Pin 4 (QET A Return #3) on the male side (stripline side) to Pin 31 (SQUID Return A) on the female side (ebox side)
    2. open switches (to break connections) corresponding to Pin 4 (switch U02-5) and Pin 31 (switch U09-4)
1350 Finish fixing Stripline 19 rerouting boards
1446 Resistance check from breakout to cold end of stripline shows Stripline 19 Feedback RET B wire is only partially connected.

Plan for rerouting Stripline 19: Bad wire = Feedback Return B. Reroute with good spare wire = QET B Return #1

  1. for SQUET-end rerouting card:
    1. add jumper from Pin 1 (Feedback Return B) to Pin 47 (QET B Return #1)
    2. break off Socket 47
  2. for D50-end rerouting card:
    1. jump Pin 22 (QET B Return #1) on the male side (stripline side) to Pin 33 (Feedback Return B) on the female side (ebox side)
    2. open switches (to break connections) corresponding to Pin 22 (switch U03-1) and Pin 33 (switch U10-3)
1530 Finish fixing Stripline 19 rerouting boards
1700 All DIBs pass electrical checks at breakout box. Some conductances to chassis are rather high, up to 4.5 nS.
1827 Place Cf source on IVC.

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