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2012/02/08

0900 Filled LN2 cold trap.
1753 Bringing DCRC33 phonon output close to 0V by adjusting the offset. No obvious effect on the charge noise.
The noise amplitude is modulated at 60Hz from time to time.
1805 The peaks around 50kHz and 70kHz seem to be related the He level meter. The 60Hz modulation also disappeared after turning of the ILM.
1814 LS370 has no effect on noise.
2058 Connected two DCRC's to ebox directly. Signals read out fine.
2204 Trigger and timing link looked fine at 0v test run. Will take +2, +4, +6, +8V data with Ba source.
2215 Filled N2 cold trap.