2011/03/26
| 1103 | Stop flashing detector |
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| 1126 | Filled N2 cold trap |
| 1130 | Unbridge the analog grounds of DCRC. The noise seemed to be smaller. |
| 1152 | Start taking data 07110326_1152_F0001. -4V on Q1-4. Trigger: Q1(28ADC) OR Q2(30ADC) OR Q3(30ADC) OR Q4(30ADC); coincidence time 50us. Trace length 1024, lookback time 100us. Auto run enabled, take data 60min, flash 20min, cooldown 40min. Flash settings: DCRC30 on DIB2 (Q1&3), LED 1&2; DCRC33 on DIB1 (Q2&4), LED1; LED current 0.6mA, 100us ON, 2500us OFF. Tower temperature ~60mK. DCRC30 on DIB2, master; DCRC33 on DIB1, slave. |
| 1655 | The series 07110326_1552 finished. DAQ started auto flashing. Stop DAQ to transfer He. Keep flashing. |
| 1715 | Begun Helium transfer. |
| 1800 | Stopped Helium transfer. |
| 1918 | Filled N2 cold trap |
After overnight baking
Q1 and Q3 still didn't work well after overnight baking.
Cuts:
- cQ# = max([Q1, Q2, Q3, Q4], [], 2)==#
- cQCchisq = cQ1chisq & cQ2chisq & cQ3chisq & cQ4chisq;
- cE = 45<Qsum.
| chisq cuts of Q1-Q4 |
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| Neutralization of Q1-Q4 |
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| The figures below plot the primary events as a function of time. Q1 and Q3 have much fewer events than Q2 and Q4. |
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| Charge energy spectrum |
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