Table of Contents
2009/12/04
Run Diary
| Time | Task |
|---|---|
| 09:15 | Check He Dewar refill. |
| 09:50 | Fill N2 cold trap. |
| 10:00 | Investigate charge noise. Take data run001 to run003. |
| G8 Qi noise psd with lights on and off |
|---|
 |
| Turn off the lights over the fridge can reduce some noise. Environmental noise also showed up. |
| Time | Task |
|---|---|
| 17:18 | Set Qi, Qo bias to 0. |
| Take run004 and run005 | |
| 17:42 | Qi = -50 mV (offset = 0.6 mV at x2020 ), Qo = 37 mV (offset = 0.4 mV at x1FE6) bias voltage when they are set to 0. |
| 17:50 | Ground Qi and Qo to the fridge. Temperature go up after grounding the charge channels. Wait for Temperature. |
| 18:19 | Temperature plateaus at 40.4 mK after grounding the charge channels. |
| 18:21 | Remove Qi Qo grounds. |
| 18:26 | Ground fridge to orange ground, temperature went up soon after that and dropped again. |
| 18:29 | Found phonon B and D saturated at -3 V. |
| 18:36 | Set all phonon channels to pulse settings and wait for temperature. T ~ 40 mK and starts to drop. No pulses. |
| 18:46 | The heatgun by Kirby generated a lot of spikes in the phonon channels. and the fridge temperature bumps a little bit. |
| 19:03 | Fill N2 cold trap full. T = 37.1 mK, still dropping. No pulses. |
| 19:16 | Checked by IbIs. Phonon sensors are not superconducting yet. Have to wait long. |
| 21:00 | Reset the board, see pulses. |
Data List
| Settings are before the runs |
|---|
| Channel | Frontend Gain | Output Gain | Feedback Null (mV) | Driver Offset (V) | SQUID bias (uA) | Lock point (mV) | QET bias (uA) |
|---|---|---|---|---|---|---|---|
| A | 7 | 1 | 0 | 2.00 | 90.01 | -3.22 | 0 |
| B | 7 | 1 | 0 | 2.00 | 93.04 | -3.40 | -50 |
| C | 7 | 1 | 0 | 0.00 | 76.63 | 2.38 | -50 |
| D | 7 | 1 | 0 | 0.00 | 69.99 | 2.10 | -50 |
| Qi (V) | 3 |
|---|---|
| Qo (V) | 3 |
| Time | Run # | Comment |
|---|---|---|
| 10:04 | 1 | Fridge grounded to orange ground; all lights on; T = 35.9 mK. |
| 10:28 | 2 | Fridge grounded to orange ground; all lights off; T = 35.9 mK. |
| 11:02 | 3 | Fridge grounded to orange ground; east lights off; T = 35.9 mK. |
| Channel | Frontend Gain | Output Gain | Feedback Null (mV) | Driver Offset (V) | SQUID bias (uA) | Lock point (mV) | QET bias (uA) |
|---|---|---|---|---|---|---|---|
| A | 7 | 1 | 0 | 2.00 | 90.01 | -3.22 | 35 |
| B | 7 | 1 | 0 | 2.00 | 93.04 | -3.40 | 0 |
| C | 7 | 1 | 0 | 0.00 | 76.63 | 2.38 | 0 |
| D | 7 | 1 | 0 | 0.00 | 69.99 | 2.10 | 0 |
| Qi (V) | 0 |
|---|---|
| Qo (V) | 0 |
| Time | Run # | Comment |
|---|---|---|
| 17:23 | 4 | Qi psd; fridge grounded to orange ground; east lights off; T = 36.4 mK. |
| 17:23 | 5 | Qi psd; fridge grounded to black ground; east lights off; T = 36.4 mK. |
| Qi (V) | x2020 and grounded |
|---|---|
| Qo (V) | x1FE6 and grounded |
[image not archived: deleteme.svg]
| Time | Run # | Comment |
|---|---|---|
| 18:00 | 6 | Qi psd; fridge grounded to black ground; east lights off; T = 36.4 mK. |
| 7 | Qi psd; fridge grounded to orange ground; east lights off; T = 36.4 mK. | |
| 18:09 | 8 | Repeat Run 7 |
| 9 | Qi psd; fridge grounded to orange ground; east lights off; T = 36.4 mK. |