Reports until 08:43, Monday 21 December 2015
H1 ISC
daniel.sigg@LIGO.ORG - posted 08:43, Monday 21 December 2015 - last comment - 09:41, Monday 21 December 2015(24354)
RF AM 45.5MHz

Plot 1 shows the RF AM stabilization out-of-loop sensor and the control signal. Over the past 30 days there were 5 clearly visible glitches in the control signal. These are reflected in the out-of-loop sensor. However, there are two non-stationary episodes in the sensor signal which have only a negligible counterpart in the control signal.

Plot 2 shows the same traces over the past 120 days. Overall, the glitches seem to have reduced in size and frequency for no apparent reason.

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cheryl.vorvick@LIGO.ORG - 09:41, Monday 21 December 2015 (24358)

Two glitches in the AC channel line up with PSL table temperature swings associated with entry into the PSL laser room.

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