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AdV-ISC (Commissioning up to first full interferometer lock)
mantovani, casanueva - 12:40 Wednesday 22 November 2017 (40120) Print this report
SSFS gain reduction test

In order to understand the structures related to the SSFS we have lowered the SSFS gain at the final lock acquisition step from 400 to 300 to 200, see Figure 1 (brown = 400, purple = 300 and blue = 200).

there are several structures that shows a worsening of the corresponding factor in h.

the gps times are:

1195380434 for Gain 400 for 200 sec

1195380742 for Gain 300 for 200 sec

1195381031 for Gain 200 for 200 sec

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Comments to this report:
mantovani, casanueva, fiori - 9:28 Thursday 23 November 2017 (40130) Print this report

The gain of the SSFS has been further lowered going from 393.6 to 100 for 300 sec (GPS = 1195460671)

fiori - 16:58 Thursday 23 November 2017 (40136) Print this report

The increase of noise at several peaks is clearly visible during the test of this morning, when the SSFS gain was reduced from 400 to 100: See Figure 1.

Seems that all the Hrec structures that are coherent with SSFS error signal are affected: Figure 2,3,4,5

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