| 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. Lead/poly shield erected (4 lead walls, 2 poly walls). |
| | Confusing IbIs results this morning |
| 0740 | Restart DAQ programs and flash DCRC1&4 SQUIDs |
| 0755 | Very strange behavior. DCRC1pD is behaving as though it is normal. Event though earlier this morning it had a reasonable IbIs curve with a transition. |
| 0815 | All channels are behaving as if normal except DCRC1pB and DCRC4pB. These are Side1pB and Side1pA, the outer channels.
The only thing I can figure is that helium films are now affecting the detector, warming up the phonon channels. I did see a 400 Hz sine wave in some channels at some point yesterday, which may have been a hint of helium films affecting the phonon channels. |
| 0820 | Now I'm suddenly seeing pulses in most channels. What the hell? |
| 0830 | Adjusted the QET biases in some of the channels, which now look like they are in transition. But in the process, pulses disappeared again - looks like they're acting like they've been driven normal again. |
| 0835 | Seeing pulses in all channels again. Wacky. |
| 0955 | DCRC4pB has weird IbIs. It seems to be overly sensitive to QET bias. Numerically speaking, the normal resistance appears to be about 2.7 times larger than before. hmm. |