2014/05/20
| 1058 | Fill N2 cold trap full. |
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| 1132 | Begin LHe transfer. |
| 1206 | Finish LHe transfer. |
| 1840 | Continue crosstalk troubleshooting. Apply 200mVpp triangle wave down QET Bias lines of all channels on DIBs 1&2. DIB3 could not successfully send test signal down QET lines. An error of LabVIEW correctly communicating with DCRC RevC.1 boards is suspected. |
| Noise was observed on all channels while sending test signal down a specific channel. This test was performed for every channel at three different QET bias settings: 0uA, Standard QET biases listed previously, -200uA QET bias for DIBs 1&2 and +200uA QET bias for DIB 3. | |
| Notable results are shown below: |
| Figure 1: DIB 1 Phonon Channels at 0 QET Bias with no test signal applied. | Figure 2: DIB 1 Phonon Channels at 0 QET Bias with 200mVpp A2 QET Bias test signal applied. |
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| Figure 3: DIB 1 Phonon Channels at -200 QET Bias with no test signal applied. | Figure 4: DIB 1 Phonon Channels at -200 QET Bias with 200mVpp A2 QET Bias test signal applied. |
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| Figure 5: DIB 2 Phonon Channels at 0 QET Bias with 200mVpp A2 test signal applied. | Figure 6: DIB 2 Phonon Channels at -200 QET Bias with 200mVpp D2 QET Bias test signal applied. |
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| Table 1: Vpp for QET Bias Test Signals for DIBs 1&2 | |
|---|---|
| DIB1 A | 1.645 |
| B | 1.40 |
| C | 1.55 |
| D | 1.70 |
| DIB2 A | .10 |
| B | .06 - .10 |
| C | .20 |
| D | .005 |