2018/08/15 (Wednesday)
| Setup: DIB1/3/4 → 3.2 MHz filters 2/3/1 → cable 3/1/2 → gender changer 3/?/2 → HVConn 1/3/2 → HV 1/2 → DCRC55(1)/DCRC50(3) 1.1kV → NaI B/C → Ortec 452(gain=5, shaping = 6 us, output=10V) / Ortec 575A(gain=10, shaping = 3us) → DCRCX(4) DCRC33(2) → kepco 1kV power supply → HV input |
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| status: Took SiHV+NaI PuBe data overnight. | |
| 0955 | Tower/MC/Coldplate = 31.7/29.3/166 mK, Still = 1.2±0.1 K / 0.080 mbar, G1/G2 = 140/133 mbar, 1K Pot = 1.64 K / 30 mbar, Turbo on IVC = 1.0 nbar, MB = 63.9% |
| 1000 | Fill LN2 cold trap bath. |
| 1015 | Start 1 x 2hr 40 V PuBe datasets each split into 10min subruns, with CDMS and NaI detectors running and DCRC2 as HV controller. Using sequence HVscan-40×1-15_5PreBias-30Flash 30wait-2hrData-10minSubRun.msl CDMS detector: Driver Gains = 2x, QET biases = (280/260/305)/(140/280/295) uA, Front-End Gains = 10 NaI detector: 1.1kV → NaI B/C → Ortec 452(gain=5, shaping = 6 us, output=10V, Pos) / Ortec 575A(gain=10, shaping = 3us, Pos) → DCRC4PB/PA, Driver Gains = 1/1, PhononWaveFormLength = 1024 (512 samples), PhononPrepulseSamples = 64 (64 samples) 1000 BOR randoms, trigger on DCRC3pB/D threshold = 7/9 |
| 1100 | Measure 6-inch housings in clean room, and prepare to ship the two 6-inch detectors (S1501, 4/3inch and S1502, 1inch) to TAMU |
| S1502 | ||||
|---|---|---|---|---|
| Housing lip to crystal surface: | 0.039 | 0.045 | 0.042 | 0.043 |
| Housing lip to housing edge: | 0.038 | |||
| Lid lip to ceiling: | 0.119 | |||
| note: spacers are such that crystal is as close to lid as doable | ||||
| Crystal surface to ceiling (calculated): | 0.123 | 3.13mm | ||
| 1120 | Remove wirebonds from S1502. Place S1502 in its housing on a stack of foam disks, resting the bare side on the foam. Remove clamps, 2×0.02“ spacers each . Lower housing down. Lift crystal by lifting foam disks. Place on table. Put foam disks on top, then lower plastic container over stack. Pick up from bottom and flip, then put lid on plastic container. |
|---|---|
| 1130 | Disassemble S1501 stack. Place S1501 in its housing on a stack of foam circles. Lid side is up. Remove clamps plus 1×0.020”, 1×0.005“ spacer for each clamp. Lower housing around foam circles, then lift out detector on a foam circle. Place on desk, put some foam disks on top, put plastic holder over stack, flip, put more foam on top. Put in some extra wipes and foam around edge so that detector is held snug in plastic holder. |
| 1350 | Remove PuBe source from lab and place in 443. |
| 1400 | Campus-wide network issues. Can't run DAQ. |
| 1606 | Start 6 x 2hr 40 V background datasets each split into 10min subruns, with CDMS and NaI detectors running and DCRC2 as HV controller. Using sequence HVscan-40×6-15_5PreBias-30Flash 30wait-2hrData-10minSubRun.msl CDMS detector: Driver Gains = 2x, QET biases = (280/260/305)/(140/280/295) uA, Front-End Gains = 10 NaI detector: 1.1kV → NaI B/C → Ortec 452(gain=5, shaping = 6 us, output=10V, Pos) / Ortec 575A(gain=10, shaping = 3us, Pos) → DCRC4PB/PA, Driver Gains = 1/1, PhononWaveFormLength = 1024 (512 samples), PhononPrepulseSamples = 64 (64 samples) 1000 BOR randoms, trigger on DCRC3pB/D threshold = 7/9 |
| 1700 | Vuk-01 still seems to be suffering from time shifts. Created a simple batch file on the Desktop called timeSynch.bat which is scheduled to synchronize the computer time with a remote server every 10 minutes. This is not a permanent solution, but will hopefully help. |
| 1701 | Fill LN2 cold trap full. |