Reports until 14:48, Wednesday 23 November 2011
LHO General
jeffrey.garcia@LIGO.ORG - posted 14:48, Wednesday 23 November 2011 (1786)
dusty event today
A dusty event occurred today just before lunch time in the LVEA.  There are three dust monitors that were triggered - "H0:PEM-LVEA_DST11_*", "H0:PEM-LVEA_DST3_*", and "H0:PEM-LVEA_DST4_*".  There was a strip tool plot running that was noticed in the Control Room, however "H0:PEM-LVEA_DST4_*" data cannot be trended in dataviewer at this time.  The attached .jpg is of the "H0:PEM-LVEA_DST11_*" and "H0:PEM-LVEA_DST3_*" dust monitors for the >0.3 and >0.5 micron triggers.  

The two plotted dust monitors are in two separate locations.  "H0:PEM-LVEA_DST11_*" is located outside the ISI/SUS test stand cleanroom between it and HAM 10.  "H0:PEM-LVEA_DST3_*" and "H0:PEM-LVEA_DST4_*" are located INSIDE the ISI/SUS test stand cleanroom near the ITMY.

The plot indicates the event triggered "H0:PEM-LVEA_DST11_*" about ~2259s before "H0:PEM-LVEA_DST3_*" was triggered.  

The amplitudes in counts during the event for each dust monitor for both >0.3 and >0.5 microns:

"H0:PEM-LVEA_DST11_5" amp = 1730
"H0:PEM-LVEA_DST11_3" amp = 2200
"H0:PEM-LVEA_DST3_5" amp = 400
"H0:PEM-LVEA_DST3_3" amp = 1940
Images attached to this report