2014/05/19
| 1110 | Fill N2 cold trap full. |
|---|---|
| 1730 | Commence crosstalk troubleshooting to investigate noise on phonon channels. Channel readout examined while applying triangle wave test signal down C2 QET bias line. A2 QET bias line also used to confirm results. Lower Vpp signals tested as well. |
| Figure 1: DIB 1 Phonon Channels with no test signal applied. | Figure 2: DIB 1 Phonon Channels with 200mVpp C2 QET Bias test signal applied. |
|---|---|
 |  |
| Figure 3: DIB 2 Phonon Channels with no test signal applied. | Figure 4: DIB 2 Phonon Channels with 200mVpp C2 QET Bias test signal applied. |
|---|---|
 |  |
| Figure 5: DIB 3 Phonon Channels with no test signal applied. | Figure 6: DIB 3 Phonon Channels with 200mVpp C2 QET Bias test signal applied. |
|---|---|
 |  |
| Figure 7: DIB 3 Phonon Channels with 100mVpp C2 QET Bias test signal applied. | |
 |
|
| Figure 8: DIB 3 Phonon Channels with 50mVpp C2 QET Bias test signal applied. | |
 |
|
| Figure 9: DIB 3 Phonon Channels with 10mVpp C2 QET Bias test signal applied. | |
 |
| Figure 10: Channel C2 Modulation curve - QET Bias applied; 200mVpp test signal applied. | Figure 11: Channel C2 Modulation curve - No QET Bias; 200mVpp test signal applied. |
|---|---|
 |  |
| 1840 | Commence taking data at various QET Bias settings. Flash detector for 30 seconds followed by 30 minute cooldown and data acquisition. Charge bias set to 0V for all three DIBs. Each data set will consist of 5-minute data series, interspersed by 6 seconds of flashing and 20 minutes of cooldown. 3.2768 ms trace length; 400 us delay; 50 uS coincidence time; 500 events per file. Data acquired with Charge OR trigger thresholds set at 40 ADC bins for all charge channels. Data acquired with the following QET Bias settings: |
|---|---|
| QET Bias for all channels set to 0uA. | |
| QET Bias set to the above values. | |
| QET Bias set to magnitude of 10uA higher than above values. | |
| QET Bias set to magnitude of 200uA. | |
| QET Bias set to the above values, and polarity set to Inverting rather than Non-Inverting. | |
| 2345 | Commence data acquisition: 4-hour flash followed by 2-hour cooldown. Six data series each of length 10 minutes, taken at +/-3.5 V bias, interspersed by 6-second flash and 20-minute cooldown periods. OR trigger on phonon channels. |
| 2355 | Fill N2 cold trap full. |