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2020/02/14 (Friday)

Previous Day

0930 Tape down wires on tower, mostly with Kapton bandaids
0945 Tape openings in stack with copper tape
0955 Perform tower electrical check - all looks good! DIB1 and DIB4 resistances a little different from yesterday for some reason but values are reasonable.

Tower electrical checkout

Detector G101D DIB 1
side coax ZB1-4-8 date/who: 2020 Feb 14 DS, MF
face 3
+lead - lead signal typical previous measured
1 2 QET A 100 to 200 Ω 190 Ω
2 4 QETA-B 100 to 200 Ω 169 Ω
3 4 QET B 100 to 200 Ω 144 Ω
4 6 QETB-C 100 to 200 Ω 175 Ω
5 6 QET C 100 to 200 Ω 178 Ω
6 8 QETC-D 100 to 200 Ω Open
7 8 QET D 100 to 200 Ω Open
2 8 QETA-D 100 to 200 Ω Open
chassis 9 LED1 Rforward 8 to 9 MΩ
chassis 9 LED1 Vforward 1.0 to 1.1 V
9 chassis LED1 Rreverse <1 nS
chassis 10 LED2 Vforward 8 to 9 MΩ
chassis 10 LED2 Vforward 1.0 to 1.1 V
10 chassis LED2 Rreverse <1 nS
1 11 Qo Rbias 24 to 26 nS
12 11 Qo C coupling <1 nS
12 13 Qo Rfeedback 24 to 26 nS
1 14 Qi Rbias 24 to 26 nS
15 14 Qi C coupling <1 nS
15 16 Qi Rfeedback 24 to 26 nS
All pins → Ground all <1 nS <1 nS
Detector G101D DIB 3
side coax SCAB date/who: 2020 Feb 14 MF, DS
face 2
+lead - lead signal typical previous measured
1 2 QET A 100 to 200 Ω Open
2 4 QETA-B 100 to 200 Ω Open
3 4 QET B 100 to 200 Ω Open
4 6 QETB-C 100 to 200 Ω Open
5 6 QET C 100 to 200 Ω 94 Ω
6 8 QETC-D 100 to 200 Ω Open
7 8 QET D 100 to 200 Ω Open
2 8 QETA-D 100 to 200 Ω Open
chassis 9 LED1 Rforward 8 to 9 MΩ
chassis 9 LED1 Vforward 1.0 to 1.1 V
9 chassis LED1 Rreverse <1 nS
chassis 10 LED2 Rforward 8 to 9 MΩ
chassis 10 LED2 Vforward 1.0 to 1.1 V
10 chassis LED2 Rreverse <1 nS
1 11 Qo Rbias 24 to 26 nS
12 11 Qo C coupling <1 nS
12 13 Qo Rfeedback 24 to 26 nS
1 14 Qi Rbias 24 to 26 nS
15 14 Qi C coupling <1 nS
15 16 Qi Rfeedback 24 to 26 nS
All pins → Ground all < 1 nS < 1 nS
Checked pC to DIP 1 pA: 176 Ohms
Detector G101D DIB 4
side coax ZB1-4-6 date/who: MF, DS
face 5
+lead - lead signal typical previous measured
1 2 QET A 100 to 200 Ω Open
2 4 QETA-B 100 to 200 Ω Open
3 4 QET B 100 to 200 Ω Open
4 6 QETB-C 100 to 200 Ω Open
5 6 QET C 100 to 200 Ω 191
6 8 QETC-D 100 to 200 Ω 203 Ω
7 8 QET D 100 to 200 Ω 205 Ω
2 8 QETA-D 100 to 200 Ω Open
9 chassis LED1 Rforward 8 to 9 MΩ 0.79 MΩ
9 chassis LED1 Vforward 1.0 to 1.1 V 1.087 V
chassis 9 LED1 Rreverse <1 nS < 1 nS
10 chassis LED2 Rforward 8 to 9 MΩ .79 MΩ
10 chassis LED2 Vforward 1.0 to 1.1 V 1.087 V
chassis 10 LED2 Rreverse <1 nS < 1 nS
1 11 Qo Rbias 24 to 26 nS
12 11 Qo C coupling <1 nS
12 13 Qo Rfeedback 24 to 26 nS
1 14 Qi Rbias 24 to 26 nS
15 14 Qi C coupling <1 nS
15 16 Qi Rfeedback 24 to 26 nS
All pins → Ground <0.1 nS <1 nS
Detector G101D DIB Accessories
side coax - date/who: 2020 Feb 14 MF, DS
face 4
+lead - lead signal typical previous measured
1 2 Motor Coil A 5-10 kΩ 7.10 kΩ 7.10 kΩ
3 4 Motor Coil B 5-10 kΩ 7.54 kΩ 7.54 kΩ
5 chassis Backward endstop - ground open open open
6 chassis Forward endstop - ground open open open
8 9 Screw terminals ~20 Ω - 69.9 Ω
11 12 Electrode low Ω - 53.9 Ω
11 DIB1p1 detector/electrode isolation <1 nS - <1 nS
all pins chassis chassis isolation <1 nS - <1 nS
1015 Attach MC adapter plate
1100 Install tower into cryostat can.
1115 Tower is attached to MC can. Plug in tower thermometer - reads 1 kOhm on the LakeShore bridge, good.
1435 Tower thermometer wire taped to MC can. Beginning to install 100mK stage.
1530 Finished assembling 100mK stage and screwed 600mK rod.
1715 Finished 4K stage. Connect DIB4 (also accessory bus)
1730 DIB4+accessories electrical check - all OK. (Feedback A too low, 1 kOhm, but only C and D used.)
2100 Add additional twist to DIB1 SQUET and reconnect
2130 Electrical checks on DIB1 and DIB3 - all OK.
2220 IVC lower piece on, screws mostly tightened. Start gently pumping IVC with scroll pump.
2230 Scroll pump on IVC = 0.22 mbar
2240 IVC pumping pressure falls below 0.1 mbar (with a little coaxing). Switch to pumping IVC with turbo pump. Pressure quickly falls below 10 μbar.

DIB 3/1/2 → Stripline 41/43/48 → cable 2/3/1

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