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2010/12/22

1236 Stop flashing the detectors. The tower temperature is around 870 during flashing.
1241 The oscillation noise shows up in charge channels. Power off both boards.
1244 Power on DCRC30 G9, there is still low frequency oscillation in charge, but not as big. Grounding the power supply helps.
1246 Power on DCRC33. The big noise come back again.
1311 DCRC33 itself has this huge noise. This seems can be reduced by grounding the board power.
1549 Removed the phonon base line oscillation by synchronizing the clock.
2108 Taking series 07101222_2105. Trigger on phonons. Trigger threshold: DCRC30 G8 3mV; DCRC33 G9 8mV. DAQ setting and Trigger setting
2130 Found series 07101222_2105 hung at fine number 3.
2218 Fill N2 cold trap full
2311 Stop the series 07101222_2138 at file 11, background run. PhD of one detector railed during the run. DCRC setting and Trigger settings. Trigger threshold: DCRC30 G8 3mV; DCRC33 G9 8mV.
2321 All channels on DCRC30 G8 are OK
2325 A and B of DCRC33 G9 railed.
2329 Fixed A and B on DCRC33 G9 by relocking the squids
2347 Put the neutron source ~40“ away from the magnetic shield, ~36” above the ground.
2351 Start 07101222_2351 with the neutron source. DCRC setting and Trigger settings. Trigger threshold: DCRC30 G8 3mV; DCRC33 G9 8mV.