2015/10/29 (Thursday) · UMN CDMS Wiki archive

	Current setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50.
	Overnight: Taking Cf data. Last flash at 8:16. Tower temp stable between flashes.
0910	Tower/MC(H35)/MC sensor/Cold Plate = 30.9/25.2/41.0/158 mK, Still = 1.33 K / 0.11 mbar, G1/G2 = 120/130 mbar, 1K Pot = 1.68 K / 13 mbar, Main bath = 62.3%
	G2 is still higher than G1, so hard to say whether switching LN traps yesterday did anything. However the difference between the gauges has decreased over the last several hours from about 15 mbar to about 7 mbar.
0915	Put Soudan Cf source back in safe.
0920	Partially fill LN2 cold trap Dewar - storage Dewar ran empty.
0954	Place Ba source at back of fridge at topmost part of shield.
1000	Set phonon thresholds from yesterday's Ba runs:

1002	Start 30min run of Ba data at -/+8V overshooting +Qbias (side 2) to 14V before starting data, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1102	Start 30min run of Ba data at +/-8V overshooting +Qbias (side 1) to 14V before starting data, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1218	Start 30min run of Ba data at -/+6V overshooting +Qbias (side 2) to 14V before starting data, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1318	Start 30min run of Ba data at +/-6V overshooting +Qbias (side 1) to 14V before starting data, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1429	Fill LN2 cold trap full.
1430	Start 30min run of Ba data at -/+10V overshooting +Qbias (side 2) to 14V before starting data, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1550	Start 30min run of Ba data at +/-10V overshooting +Qbias (side 1) to 14V before starting data, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1633	Put Ba source back in safe.
1635	Place Cf source inside shield near detector for overnight Cf data.
1637	Set phonon thresholds back to Wednesday's values:

1653	Start 15 cycles of 30min runs of Cf data in the following order (-/+4V, +/-2V, +/-2V, +/-4V, +/-4V)X3, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1728	Fill LN2 cold trap full.