2016/06/27 (Monday)
| Status | waiting to receive a third side coax to finish building tower. Expected to arrive today. |
|---|---|
| 0905 | Pump mixture from 3He pump into dump: 775.9 mbar on G2, barometric = 30.11“Hg, adjusted dump pressure = 782.3 mbar |
| 0925 | Pump out LN2 cold traps with turbo pump (both at room temperature). Trap 1 was empty but Trap 2 had a few mbar in it. |
| 0940 | Pump out fridge contents with turbo pump through condenser speedivalve and still gate valve, and v8, v1, v2, v7, v2a, v5a. |
| 1110 | Received new side coaxes from SLAC. Opened and testing in clean room. |
| Side coax | ST-3-3 | |||
|---|---|---|---|---|
| date: | 2015-06-27 | who: | DS NM | |
| +lead | - lead | signal | typical | measured |
| D11 | T11 | Qo Rbias | 25 nS | 25 nS |
| T12 | T13 | Qo Rfeedback | 25 nS | 25 nS |
| D11 | T12 | Qo C coupling | <1 nS | <1 nS |
| D12 | T14 | Qi Rbias | 25 nS | 25 nS |
| T15 | T16 | Qi Rfeedback | 25 nS | 25 nS |
| D12 | T15 | Qi C coupling | <1 nS | <1 ns |
| D(1-10) | T(1-10) | LEDs, Phonons | ? | <25Ω |
| Side coax | ST-3-8 | |||
|---|---|---|---|---|
| date: | 2015-06-27 | who: | DS NM | |
| +lead | - lead | signal | typical | measured |
| D11 | T11 | Qo Rbias | 25 nS | 27 nS |
| T12 | T13 | Qo Rfeedback | 25 nS | 25 nS |
| D11 | T12 | Qo C coupling | <1 nS | <2 nS |
| D12 | T14 | Qi Rbias | 25 nS | 27 nS |
| T15 | T16 | Qi Rfeedback | 25 nS | 25 nS |
| D12 | T15 | Qi C coupling | <1 nS | <2 ns |
| D(1-10) | T(1-10) | LEDs, Phonons | 20-30Ω | <23Ω |
ST-3-8, Pin T1 was slightly bent, straigtened with tweezers.
| 1130 | Place ST-3-8 into purge cabinet with protector boards attached. Place extender board onto tower side of ST-3-3 and attach ST-3-3 to tower. |
|---|---|
| 1140 | Perform tower electrical check on DIB3. |
| Detector | G106a | DIB | 3 | |
|---|---|---|---|---|
| side coax | ST-3-3 | date/who: | 2015-06-27 | DS NM |
| face | 5 | |||
| +lead | - lead | signal | typical | measured |
| 1 | 2 | QET A | 100 to 200 Ω | 198Ω |
| 2 | 4 | QETA-B | 100 to 200 Ω | 243Ω |
| 3 | 4 | QET B | 100 to 200 Ω | 222Ω |
| 4 | 6 | QETB-C | 100 to 200 Ω | 181Ω |
| 5 | 6 | QET C | 100 to 200 Ω | 167Ω |
| 6 | 8 | QETC-D | 100 to 200 Ω | 177Ω |
| 7 | 8 | QET D | 100 to 200 Ω | 149Ω |
| 2 | 8 | QETA-D | 100 to 200 Ω | 207Ω |
| chassis | 9 | LED1 Rforward | 8 to 9 MΩ | 769 kΩ |
| chassis | 9 | LED1 Vforward | 1.0 to 1.1 V | 1.094 V |
| 9 | chassis | LED1 Rreverse | <1 nS | 60 - inf nS |
| chassis | 10 | LED2 Rforward | 8 to 9 MΩ | ~190 kΩ |
| chassis | 10 | LED2 Vforward | 1.0 to 1.1 V | 1.076 V |
| 10 | chassis | LED2 Rreverse | <1 nS | inf nS (closed connection) |
| All pins → Ground | <1.0nS | (Except for LED pins) | ||
| 1155 | This behavior for the DIB3 LEDs on G106a appears to have been known since at least Run 39. Proceed with installing adapter plate. |
|---|---|
| 1400 | Begin installing tower. Attach to 30mK can. |
| 1515 | Begin cryocleaning mixture through LN2 Cold Trap 2 |
| 1525 | Strangely G2 was completely flat at 982.8 mbar, G1 fell steadily from 870 to 790 mbar. Seems like the trap is impeding flow. Pump trap to dump to less than 0.2 mbar on P1. |
| 1540 | Take LN2 Trap 2 out of bath to let warm |
| 1630 | Trap 2 pressure leveling to around 20 mbar on G1 (trap still somewhat cool to the touch but above freezing). |
| 1635 | Pump out Trap 2 with 4He pump |
| 1640 | Put Trap 2 back into LN2 bath and open V12a and V4 to do some passive cleaning |
| 1700 | 100mK stage and 600mK stage finished in tower installation |