| 0950 | MC = 53 mK, Tower = 72 mK, MC Sensor = -37.7 kΩ. Still = 4 mW / 1.07 K / 0.180 mbar. G1/G2 = 98/112 mbar. 1K Pot = 1.71 K / 20 mbar. Cold plate = 0.304 K / 9.53 kΩ. | |
|---|---|---|
| Overnight, MC had small oscillations (+/- 1 mK), and G1/G2 rose gradually. | ||
| 1235 | MC has been rising slowly, a couple of mK. Tried reducing still heat to 2 mW but oscillations began to show up again. Switched back to 4 mW, and after a bit the base and G1/G2 stabilized to lower values. | |
| 1356 | MC back down to 53 mK and stable, G1/G2 = 77/96 mbar and stable. | |
| 1400 | Connect DCRC 50 (Rev C.1) to DIB3, DCRC 33 (Rev C) to DIB 2. Lock SQUIDs: |
| DIB3 DCRC50 (C.1) | SQUID Bias [uA] | Lockpoint [mV] | Modulation Depth [Vpp] |
|---|---|---|---|
| A | -82.03 | -4.77 | .340 |
| B | -80.08 | -3.31 | .327 |
| C | -87.89 | -2.72 | .382 |
| D | -82.03 | -3.40 | .350 |
| DIB2 DCRC33 | SQUID Bias [uA] | Lockpoint [mV] | Modulation Depth [Vpp] |
|---|---|---|---|
| A | 78.13 | 4.77 | .435 |
| B | 68.36 | 3.30 | .401 |
| C | 80.08 | 3.41 | .427 |
| D | 78.13 | 3.50 | .448 |
| Problems with DCRC31. We can communicate with this board sometimes, but only if it is not connected to the ethernet switch at the same time as DCRC33 (as though commands sent for DCRC33 are confusing DCRC31). | |
| 1745 | With DCRC50 connected to DIB1 and DCRC33 connected to DIB2, begin flashing detector. Also bake with Ba source, taped to Dewar 26“ down from bottom of Dewar flange. |