2012/10/09
| 1015 | Fed Cricket 3 pellets. |
|---|---|
| 1030 | Filled LN2 cold trap. |
| 1650 | Tuned DCRC 32. Channel C still exhibits need for high QET bias. Zapping seemed to work this time. For future reference, be sure to zero all biases on all channels before zapping all squids. Not sure if this was an issue, but it's a good precaution. Board 31 is having an error in the zapping process. Jianjie is currently investigating. |
| Table 1: DIB 1, DCRC 33 | ||||||
|---|---|---|---|---|---|---|
| Phonon Channel | SQUID Bias (micro A) | Lockpoint (mV) | Modulation Depth (mV) | QET Bias (uA) | Inverting or Not? | Comment |
| A | 99.6 | 5.25 | 5.8 | -107 | NI | |
| B | 93 | 1.50 | 5.33 | -73 | NI | |
| C | 96 | 6.36 | 5.50 | -73 | I | |
| D | 95 | 5.20 | 5.36 | -50 | NI | Noisy channel |
| Table 2: DIB 2, DCRC 32 | ||||||
|---|---|---|---|---|---|---|
| Phonon Channel | SQUID Bias (micro A) | Lockpoint (mV) | Modulation Depth (mV) | QET Bias (uA) | Inverting or Not? | Comment |
| A | 68.4 | 5.74 | 5.3 | -45 | NI | |
| B | 94 | 3.6 | 5.13 | -68 | I | |
| C | 97 | 5.74 | 6.16 | -465 | NI | |
| D | 95 | 5.1 | 5.5 | -45 | NI | |
| 1711 | Filled LN2 cold trap. |
|---|---|
| 1740 | Fed Cricket 4 pellets. |
| 1904 | Start flashing detector. |
| DCRC 31 has 3 out of 4 channels tuned. Channel B is still slightly problematic. Will try again in the morning. |