| Setup | Run 73. DIB 1/3/4 → Stripline 43/48/41 → pi-filters 1/2/3 → Cable 3/1/2 → nothing/nothing/accessory_interposer → HV_Conn 1/3/2 → HV 1/2 → DCRCX(4)/DCRC55(1)-master; DCRC33(2) → HV control. DCRCs on (except DCRC4). Lead/poly shield erected (4 lead walls, 2 poly walls). |
| | DCRC4 is powered off because it wasn't working right yesterday |
| 0910 | Not seeing pulses in DCRC2 channels, not sure what's up.
Zap DCRC1 SQUIDs |
| 1045 | Seeing pulses now |
| 1055 | Tower thermometer = 51.6 mK. DCRC1pD IbIs suggests detector temperature = 54.7 mK |
| | Some ugly, spiky noise in DCRC1pD. Pulses still look like they have short falltimes, especially in DCRC1pB. Maybe the short fall times have to do with helium films rather than trapped flux? |
| 1240 | Matt Fritts body temperature 97.8 °F |
| 1300 | MB = 57.4% |
| 1310 | Matt arrives in lab |
| 1310 | Tower/MC/Coldplate = 51.0/29.9/188 mK, Still = 1.39 K / 0.110 mbar / 0 mW, G1/G2= 242/211 mbar, 1K Pot = 1.61 K / 17±1 mbar. |
| 1315 | Fill LN2 cold trap bath |
| 1315 | Plug in power on DCRC4 |
| 1315 | Turn off DAQ programs, reenable DCRC4 on ODB, restart programs, zap DCRC1&4 SQUIDs. |
| 1320 | Turbo on IVC = 1.6 nbar. With Turbo valved out for 1 minute, IVC = nbar. Reopen Turbo to continue pumping IVC. |
| 1320 | Looks like DCRC4 channels are working, seeing pulses in them. |
| 1705 | Tower thermometer around 54 mK. DCRC1pD (Side1pF) IbIs implies detector temperature around 68 mK, quite high |
| 1715 | DCRC4pB IbIs is still behaving strangely, as though Rnormal was much higher than before. |
| 1730 | DCRC4pB (Side1pB) IbIs implies detector temperature around 57 mK (Tower thermometer also around 57 mK) |
| 1745 | DCRC4pC (Side1pD) IbIs implies it is completely in the normal state |
| 1800 | DCRC1pB (Side1pA) IbIs implies detector temperature probably around 68 or 69 mK |
| 1820 | DCRC1pC (Side1pC) IbIs implies detector temperature probably around 69 mK |
| | so yeah - generally the TESs are behaving as if the detector is very warm (one channel is behaving oddly, but the others are generally consistent). Tower thermometer though reads pretty lo, so it's pretty strange. I'm guessing helium films. No point really taking data in this state. Should consider a partial warmup. |