UMN CDMS Wiki archive
start › cdms › k100 › run_diary › 20100726

2010/07/26

9:09 IVC He signal: 5.7E-6 cc/s. MC X12004: 5.67K. He level: 74.1%
9:30 Fill N2 cold trap full, close IVC, start 1K pot, start condensing
10:30 MC thermometer H35 is open. Start circulation
11:46 Add 6mW to still
13:51 Plug in DCRC v2 tower temperature went up from 104mK to 114mK
15:00 Zero DCRC and zap squids
17:29 Tower temperature drops to 47mK after unplugging DCRC v2. DCRC v2 was heating the fridge.
17:38 Still seemed hotter, change still power from 6mW to 5mW
17:42 Tower temperature drops to 46.3 mK
17:44 Still: 4.4kΩ, 5mW; Cold plate: 17.1kΩ; MC: 79kΩ; Tower: 46.7mK; P1: 0.18mbar; G1: 124.4mbar; G2=126.6mbar; P2=6.5mbar; 1K pot=1.567K. Still temperature looks OK. Cold plate and MC temperature are high, there might be tough between 600mK and 100mK
17:57 Set still power to 0
18:25 Tower=47mK; MC=76.8kΩ; Cold plate=17.5kΩ; still=4.5kΩ; P1=0.095mbar; G1=88.9mbar; G2=91.5mbar; 1K pot =1.561K; P2=7.0mbar. Is there touch between 4K and 600mK.
18:41 Power on DCRC v2, tower temperature goes up. Turn on FET heater, charge signal shows up after a while, tower temperature starts to drop.
18:51 Tower temperature drops to 47.6 mK. Zapping squids. One zapping and cool down cycle takes ~10min.
20:26 Start flashing the detector.
20:33 Fill N2 cold trap full
Detector baking settings
Temperature during and right after stop baking