Table of Contents
2011/03/28
| 1039 | Filled N2 cold trap |
|---|---|
| 1523 | Power off both boards. Connect Qi and Qo bias of DCRC30 (DIB2) to the analog ground of DCRC33 (DIB1). Power up DCRC30 and then DCRC33. |
| Both boards can be read correctly. | |
| 1529 | Flash the detector |
| 1751 | Stop flashing the detector. Found an accident happened around Mar. 24, 9:25 in the morning, which caused us to lose events on Q1 and Q3. This could be in the crystal or in the DCRC. I'm going to swab the two boards and take some data to find out. |
| DCRC30 on DIB1 and DCRC33 on DIB2 after this point | |
| 1914 | Finished transferring liquid Helium. |
| 1916 | Start taking data 07110328_1916_F0001 after swabbing the two boards. -4V on Q1-4. Trigger: Q1(30ADC) OR Q2(28ADC) OR Q3(30ADC) OR Q4(30ADC); coincidence time 50us. Trace length 1024, lookback time 100us. |
| 1959 | Stop the run 07110328_1916. 10 files taken. |
| 2101 | After swabbing the two boards, Q1 and Q3 still had low event rate. But the 60keV line was picked up by DCRC33. Was this due to flashing? |
| 2146 | Power off both boards. Measured AGND-GND: 100Ohms, AGND-Chassis = 0.x Ohms, AGND-Qet ret:0.x Ohms. So the analog grounds are bridged automatically. Short Q1 and Q3 to chassis and do the overnight flash. |
| 2150 | Start to flash the detector with Q1 and Q3 grounded to chassis. |
| 2154 | Filled N2 cold trap. |
Data after swapping the two boards
The cuts are defined as
- cQ# = max([Q1, Q2, Q3, Q4], [], 2)==#
- cQCchisq = cQ1chisq & cQ2chisq & cQ3chisq & cQ4chisq;
- cE = 50<Qsum.
Data:
07110328_1916
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