Environmental Monitoring (Environmental Monitoring)soldani, calloni, campagna, frasconi, gennai, marque, swinkels, vajente - 21:29 Friday 13 February 2009 (22046)
Print this reportAC OFF testAt the beginning of this afternoon we performed an air-conditioning switch-off test. Davide went all around the interferometer with the following schedule:
LTime OFF LTime ON
NET pumps 16:37 17:40
NET UTA (fans) 16:39 17:38
WET pumps 16:47 17:25
WET UTA 16:49 17:24
MC pumps 16:54 17:17
MC UTA 1+2 16:54 17:17
DAQ UTA 16:58 17:14
pump #2 17:00 17:13
UTA CE Hall 17:02 17:12
UTA clean rooms 17:05 17:10
Unfortunately the ITF unlocked at 17:08 for a NI oscillation.
Fig.1 shows the good sensitivity almost at the moment of the complete switching off, compared to May the 5th.
The improvement of the noise on B1p at the moment of the switching off is evident in the region 20 Hz - 120 Hz (see fig. 2 for a comparison with a spectum before the test).