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- Lab Update - Run 77
- Today is a cooldown day. In the last cooldown (Fri-Sat), we tried plugging in each cable to DCRC3 to check for phonon channels status, but the results remain same.
| From IbIs with MC = 31 mK | |||||||
|---|---|---|---|---|---|---|---|
| SQUET | Cable | DCRC channel | Detector channel | SQUID Bias | SQUID Lockpoint | After Third 10K pumpout | Previous Run |
| ZC-74 | 1 | DCRC1pC | Side1pC | -92.6 | -3.98 | no transition(feedback resistance low) | 235 |
| ZC-74 | 1 | DCRC1pD | Side1pF | -97.9 | -2.4 | 148 | 274 |
| ZC-31 | 2 | DCRC3pA | Side1pE | -98.1 | -6.12 | 135 | 246 |
| ZC-31 | 2 | DCRC3pB | Side1pB | -87.6 | -3.49 | 190 | 225 |
| ZC-31 | 2 | DCRC3pC | Side1pD | -44.4 | -2.86 | no transition | 258 |
| ZC-26 | 3 | DCRC4pC | Side1pA | -83.7 | -7 | 320 | 212 |
| ZC-74 | 1 | DCRC1pA | Side2pC | -95(guess) | -2.5(guess) | no transition | |
| ZC-74 | 1 | DCRC1pB | Side2pF | -100 | -2.01 | no transition | |
| ZC-31 | 2 | DCRC3pD | Side2pE | -89.1 | -3.81 | no transition | |
| ZC-26 | 3 | DCRC4pA | Side2pB | -83(guess) | -5.91(guess) | no response to change in QETbias | |
| ZC-26 | 3 | DCRC4pB | Side2pA | -83(guess) | -5.91(guess) | no response to change in QETbias | |
| ZC-26 | 3 | DCRC4pD | Side2pD | -93.1 | 1.56 | no transition | |
- For IbIs automation, I made the odbedit-based python code to start the run and keep changing the bias after 20 seconds. With a series duration of 60 seconds and 5 uA step-size, there are roughly 3 changed bias per dump. The stop command works intermittently.
- With pyrawio package, I processed the raw traces (avg. of first 200 bins) and plotted average per event and per dump values as a function of output voltage. the graphs look promising.
- raw trace ADC to voltage conversion factor: 2.5 V over 14-bit (16384), RevC.1 gain of 5.5 gives 2.5/16384/5.5 V
- Attached a 15-pin Dsub to RoxU09 thermometer wire output to read it using the new Lakeshore Switch. Ping helped to figure out the settings on the Lakeshore Resistance Bridge to read the thermometer. Modified the Labview VI to read the thermometer.
- Priority Updates
- General Updates
- Himangshu
- Shubham
- Jack
- Derek
- Zach
- Scott
- Giulia
- Fun Update