2015/11/05 (Thursday) · UMN CDMS Wiki archive

	Current setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50.
	Overnight: Tower temp stable.
1005	Remove Y source from fridge, return to safe
1010	Fill LN2 cold trap Dewar
1015	Tower/MC(H35)/MC sensor/Cold Plate = 30.8/24.9/40.9/159 mK, Still = 1.37 K / 0.11 mbar, G1/G2 = 125/130 mbar, 1K Pot = 1.69 K / 16 mbar, Main bath = 56.2%
	G2 is above G1, I guess this is a new normal. 1K Pot is higher than a few days ago but seems stable.
1350	Put Y-88 source in shield and measure raw trigger rate by counting pulses visible in several 100 ms traces:

x	y	Rate	Time measured
Source position relative to detector
10 cm	12 cm	74 Hz	0.5 s
10 cm	20 cm	76 Hz	0.5 s
10 cm	30 cm	58 Hz	0.5 s
10 cm	40 cm	40 Hz	0.5 s
10 cm	50 cm	40 Hz	0.5 s
10 cm	60 cm	34 Hz	0.5 s
source removed		33 Hz	1.0 s

1410	Place Y source all the way down inside shield near detector (about 12 cm above detector level). Set all phonon trigger thresholds to 65 ADC bins.
1413	Start 30min run of Y data at +/-4V, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1514	Start 30min run of Y data at +/-4V, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1535	Accidentally knock out timing link cable connecting DCRC33 from other boards. During end of 5th dump. Reconnect and reset timing link during beginning of 6th dump.
1624	Start 30min run of Y data at +/-4V, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1735	Put Y-88 source away in safe.
1903	Fill LN2 cold trap full.
1905	Place Y-88 source inside shield near detector.
1908	Start 13 cycles of 30min runs of Y data at +/-4V, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.