| | Current setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50. |
| | Overnight: Taking Cf data. Last flash at 8:11. Tower temp stable between flashes. |
| 0915 | Tower/MC(H35)/MC sensor/Cold Plate = 31.1/27.0/41.4/153 mK, Still = 1.30 K / 0.11 mbar, G1/G2 = 125/135 mbar, 1K Pot = 1.69 K / 13 mbar, Main bath = 37.8% |
| 0920 | Fill LN2 cold trap Dewar. |
| | G2 up relative to G1. Is a trap impedance forming? It has been rising since about 2am. |
| 0925 | Put Soudan Cf source back in safe. |
| | We started this run circulating through LN cold trap 1 then switched on 2015/09/28 to cold trap 2. We never cleaned out Cold Trap 1 apparently. |
| 0935 | Remove Cold Trap 1 from Dewar to let warm. Top off LN in Dewar to compensate for removing Trap 1. |
| 1111 | Isolate 1K Pot from pumping by closing V4a. Let P2 pump down remaining He from 1K Pot, then close valve on He4 pump. Open V11a, V7, V2a, and V5a to allow dirt from Cold Trap 1 to P2. P2 reads 120mbar of dirt. |
| 1112 | Open valve on He4 pump to pump out dirt from Cold Trap 1. |
| 1114 | When P2 reads 0.2mbar, close V11a, V7, V2a, and V5a. 1K Pot has reached 2.55K, P1 = 0.18mbar, G1/G2 increased by ~40mbar, and tower temperature has increased by ~0.6mK. |
| 1115 | Open V4a to begin pumping on 1K Pot again. 1K pot temp begins falling, oscillates, then stabilizes back to previous value. |
| 1118 | Put Cold Trap 1 back in LN2 bath. |
| 1131 | Switch He4 pump from Exhaust back to Recovery. |
| 1140 | Following the procedure from the Run Manual, switch to circulating through Cold Trap 1. P1 increased to 40mbar while extracting remaining mixture from Cold Trap 2 through V11a and V8, but quickly declined back to usual levels. |
| 1221 | P1 back at 0.11mbar. Close V11b and V8. |
| 1225 | Place Ba source at back of fridge inside top most part of shield. |
| 1228 | Start 30min run of Ba data at -/+10V overshooting +Qbias (side 2) to 14V before starting data, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after. Use phonon trigger thresholds from last Wednesday |
| | Rate drops to ~2Hz, so raise all phonon trigger thresholds by 20 ADC bins each: |