UMN CDMS Wiki archive
start › cdms › k100 › run_diary › 20110311

Table of Contents

2011/03/11

Tower Assembly

1400 Audit completed. Return sources to clean room for installation in source holder.
Begin tower assembly.
1430 One of the modified Schuba extender plugs requires more copper to be shaved off.
Take both Schuba extender plugs to mill to shave off an additional 0.6“. Total thickness of copper removed is 0.2“.
1530 Schuba extender plugs fit nicely. Continue to assemble tower.
Figure 1: Adapter plate for 3“ tower to fit on can for 4“ detectors. Jigsaws around side coaxes.
adapterplate1.jpgadapterplate2.jpg
Figure 2: Assembled tower.
assembledtower.jpg
Figure 3: Tape over holes to prevent IR leaks. Keep two holes in source holder open to enable evacuation of gas trapped within the tower (not shown).
tapeoverholes1.jpgtapeoverholes2.jpg

Tower Level Continuity Check

1800 Perform tower level continuity checks.
Detector G101 DIB 1
side coax ZB1-1-9 date/who: 2011-03-11 JZ & RR
face 5
+ve lead -ve lead signal measured
1 2 QET A 126.3 Ω
9 chassis LED1 Rforward 799 kΩ
10 chassis LED2 Rforward open
chassis 9 LED1 Rreverse <1 nS
chassis 10 LED2 Rreverse <1 nS
1 11 Qo Rbias 26 nS
12 11 Qo C coupling <1 nS
12 13 Qo Rfeedback 26 nS
1 14 Qi Rbias 26 nS
15 14 Qi C coupling <1 nS
15 16 Qi Rfeedback 26 nS
Detector G101 DIB 2
side coax ZB1-1-6 date/who: 2011-03-11 JZ & RR
face 2
+ve lead -ve lead signal measured
9 chassis LED1 Rforward 787 kΩ
10 chassis LED2 Rforward 779 kΩ
chassis 9 LED1 Rreverse <1 nS
chassis 10 LED2 Rreverse <1 nS
1 11 Qo Rbias 26 nS
12 11 Qo C coupling <1 nS
12 13 Qo Rfeedback 26 nS
1 14 Qi Rbias 26 nS
15 14 Qi C coupling <1 nS
15 16 Qi Rfeedback 26 nS

Tower Installation

2100 Take tower to fridge for installation.
Figure 4: Tower fastened to 30 mK stage.
towerinfridge.jpg