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2015/11/20 (Friday)

Previous Day (Run 54)

0830 Status: fridge room temperature, Dewar dropped (and vacuum jacket pumped out), clean tent in place, IVC open and tower in purge cabinet.
0900 Remove tower from purge cabinet
0940 Tower electrical checks below. Confusing results on LEDs, they seem to be open when measuring resistance and OL when measuring diode voltage
1020 LED problem turned out to be mislabeled polarity in table (i.e. chassis-to-9 rather than 9-to-chassis). Relabeled these in the table.
Detector G106a DIB 1
side coax ZB1-4-4 date/who: 2015-11-20 MF
face 2
+lead - lead signal typical measured
1 2 QET A 100 to 200 Ω 126 Ω
2 4 QETA-B 100 to 200 Ω 206 Ω
3 4 QET B 100 to 200 Ω 193 Ω
4 6 QETB-C 100 to 200 Ω 211 Ω
5 6 QET C 100 to 200 Ω 188 Ω
6 8 QETC-D 100 to 200 Ω 200 Ω
7 8 QET D 100 to 200 Ω 156 Ω
2 8 QETA-D 100 to 200 Ω 178 Ω
chassis 9 LED1 Rforward 8 to 9 MΩ 750 kΩ
chassis 9 LED1 Vforward 1.0 to 1.1 V 1.089 V
9 chassis LED1 Rreverse <1 nS <0.1 nS
chassis 10 LED2 Rforward 8 to 9 MΩ 729 kΩ
chassis 10 LED2 Vforward 1.0 to 1.1 V 1.100 V
10 chassis LED2 Rreverse <1 nS <0.8 nS
1 11 Qo Rbias 24 to 26 nS 26 nS
12 11 Qo C coupling <1 nS 0.1 nS
12 13 Qo Rfeedback 24 to 26 nS 26 nS
1 14 Qi Rbias 24 to 26 nS 26 nS
15 14 Qi C coupling <1 nS 0.2 nS
15 16 Qi Rfeedback 24 to 26 nS 26 nS
Detector G106a DIB 2
side coax ZB1-4-6 date/who: 2015-11-20 MF
face 5
+lead - lead signal typical measured
1 2 QET A 100 to 200 Ω 202 Ω
2 4 QETA-B 100 to 200 Ω 186 Ω
3 4 QET B 100 to 200 Ω 124 Ω
4 6 QETB-C 100 to 200 Ω 135 Ω
5 6 QET C 100 to 200 Ω 168 Ω
6 8 QETC-D 100 to 200 Ω 173 Ω
7 8 QET D 100 to 200 Ω 123 Ω
2 8 QETA-D 100 to 200 Ω 195 Ω
chassis 9 LED1 Rforward 8 to 9 MΩ 749 kΩ
chassis 9 LED1 Vforward 1.0 to 1.1 V 1.088 V
9 chassis LED1 Rreverse <1 nS ? <0.2 nS
chassis 10 LED2 Rforward 8 to 9 MΩ 721 kΩ
chassis 10 LED2 Vforward 1.0 to 1.1 V 1.085 V
10 chassis LED2 Rreverse <1 nS ? <0.9 nS
1 11 Qo Rbias 24 to 26 nS 25 nS
12 11 Qo C coupling <1 nS <0.1 nS
12 13 Qo Rfeedback 24 to 26 nS 26 nS
1 14 Qi Rbias 24 to 26 nS 25 nS
15 14 Qi C coupling <1 nS <0.1 nS
15 16 Qi Rfeedback 24 to 26 nS 26 nS
Detector G106a DIB 3
side coax ZB1-4-8 date/who: 2015-11-20 MF
face 6
+lead - lead signal typical measured
1 2 QET A 100 to 200 Ω 180 Ω
2 4 QETA-B 100 to 200 Ω 220 Ω
3 4 QET B 100 to 200 Ω 202 Ω
4 6 QETB-C 100 to 200 Ω 165 Ω
5 6 QET C 100 to 200 Ω 152 Ω
6 8 QETC-D 100 to 200 Ω 163 Ω
7 8 QET D 100 to 200 Ω 148 Ω
2 8 QETA-D 100 to 200 Ω 190 Ω
chassis 9 LED1 Rforward 8 to 9 MΩ 745 kΩ
chassis 9 LED1 Vforward 1.0 to 1.1 V 1.086 V
9 chassis LED1 Rreverse <1 nS 15 MΩ
chassis 10 LED2 Rforward 8 to 9 MΩ 300±20 kΩ
chassis 10 LED2 Vforward 1.0 to 1.1 V 1.076 V
10 chassis LED2 Rreverse <1 nS 350 kΩ
1030 Remove MC adapter plate and side coaxes from tower
1050 Remove detector G106A from top of stack and place in purge. Discovered that the side of the Pb-210 source facing the detector has tape on it - Hassan specifically said that if there is tape on one side, that side is not the active side.
Pb-210 Source
In stack, Run 54 configuration Inactive side (assembled wrong in holder) Active side (assembled wrong in holder)
Note that the o-ring mark on the active side is dark and very prominent.
1115 Remove Am source holder from source holder plate. Put Am source back in safe. Put Am souce holder in purge.
Am source holder parts, in assembly order
1125 Reverse Pb source so it is facing the correct way, active side toward detector. The source holder is oriented so that the source offset makes it closest to Face 5. That will be closest to DIB 2.
1135 Put detector G106a on stack. Orientation is DIB1→Face2, DIB2→Face5, DIB3→Face6
1145 Install side coaxes, ZB4-4 → DIB1&Face2, ZB1-4-8 → DIB3&Face6, ZB1-4-6 → DIB2&Face5
1230 Install MC can adapter plate and put tower in purge
1500 Perform assembled tower electrical check.
Detector G106a DIB 1
side coax ZB1-4-4 date/who: 2015-11-20 MF & DS
face 2
+lead - lead signal typical measured
1 2 QET A 100 to 200 Ω 126 Ω
2 4 QETA-B 100 to 200 Ω 203 Ω
3 4 QET B 100 to 200 Ω 190 Ω
4 6 QETB-C 100 to 200 Ω 209 Ω
5 6 QET C 100 to 200 Ω 187 Ω
6 8 QETC-D 100 to 200 Ω 196 Ω
7 8 QET D 100 to 200 Ω 155 Ω
2 8 QETA-D 100 to 200 Ω 179 Ω
chassis 9 LED1 Rforward 8 to 9 MΩ 767 kΩ
chassis 9 LED1 Vforward 1.0 to 1.1 V 1.091 V
9 chassis LED1 Rreverse <1 nS <0.1 nS
chassis 10 LED2 Rforward 8 to 9 MΩ 745 kΩ
chassis 10 LED2 Vforward 1.0 to 1.1 V 1.094 V
10 chassis LED2 Rreverse <1 nS <0.8 nS
1 11 Qo Rbias 24 to 26 nS 26 nS
12 11 Qo C coupling <1 nS 0.1 nS
12 13 Qo Rfeedback 24 to 26 nS 26 nS
1 14 Qi Rbias 24 to 26 nS 26 nS
15 14 Qi C coupling <1 nS 0.2 nS
15 16 Qi Rfeedback 24 to 26 nS 26 nS
Detector G106a DIB 2
side coax ZB1-4-6 date/who: 2015-11-20 MF & DS
face 5
+lead - lead signal typical measured
1 2 QET A 100 to 200 Ω 200 Ω
2 4 QETA-B 100 to 200 Ω 184 Ω
3 4 QET B 100 to 200 Ω 124 Ω
4 6 QETB-C 100 to 200 Ω 181 Ω
5 6 QET C 100 to 200 Ω 168 Ω
6 8 QETC-D 100 to 200 Ω 172 Ω
7 8 QET D 100 to 200 Ω 123 Ω
2 8 QETA-D 100 to 200 Ω 194 Ω
chassis 9 LED1 Rforward 8 to 9 MΩ 762 kΩ
chassis 9 LED1 Vforward 1.0 to 1.1 V 1.090 V
9 chassis LED1 Rreverse <1 nS <0.3 nS
chassis 10 LED2 Rforward 8 to 9 MΩ 735 kΩ
chassis 10 LED2 Vforward 1.0 to 1.1 V 1.087 V
10 chassis LED2 Rreverse <1 nS <1 nS
1 11 Qo Rbias 24 to 26 nS 26 nS
12 11 Qo C coupling <1 nS <0.1 nS
12 13 Qo Rfeedback 24 to 26 nS 26 nS
1 14 Qi Rbias 24 to 26 nS 25 nS
15 14 Qi C coupling <1 nS <0.2 nS
15 16 Qi Rfeedback 24 to 26 nS 26 nS
Detector G106a DIB 3
side coax ZB1-4-8 date/who: 2015-11-20 MF & DS
face 6
+lead - lead signal typical measured
1 2 QET A 100 to 200 Ω 180 Ω
2 4 QETA-B 100 to 200 Ω 220 Ω
3 4 QET B 100 to 200 Ω 202 Ω
4 6 QETB-C 100 to 200 Ω 165 Ω
5 6 QET C 100 to 200 Ω 152 Ω
6 8 QETC-D 100 to 200 Ω 163 Ω
7 8 QET D 100 to 200 Ω 148 Ω
2 8 QETA-D 100 to 200 Ω 190 Ω
chassis 9 LED1 Rforward 8 to 9 MΩ 758 kΩ
chassis 9 LED1 Vforward 1.0 to 1.1 V 1.086 V
9 chassis LED1 Rreverse <1 nS 6.5 MΩ
chassis 10 LED2 Rforward 8 to 9 MΩ 198 kΩ
chassis 10 LED2 Vforward 1.0 to 1.1 V 1.082 V
10 chassis LED2 Rreverse <1 nS 435 kΩ
Bolded entries show entries of note. LEDs on DIB3 seem a bit leaky, and DIB2 QET B-C has a resistance of ~50Ω higher than it did this morning.
1515 Place tower back in purge cabinet.

Next Day (Run 55)