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Reports until 09:15, Saturday 16 March 2024
H1 ISC (ISC)
ibrahim.abouelfettouh@LIGO.ORG - posted 09:15, Saturday 16 March 2024 - last comment - 16:34, Monday 15 July 2024(76454)
DARM Offset Test

DARM Offset Test:

Test was run without issues and upon checking the PCAL X and Y Excitation screens, the only differences I can see before vs. after are in the OSC_TRAMP Times:

PCALX: OSC TRAMP (sec) OSC1 was 3 and went to 5

PCALY: OSC TRAMP (sec) OSC1-9 were 10 and went to 5.

I reverted these to their before values - everything else is the same (screenshots below).

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jennifer.wright@LIGO.ORG - 11:19, Monday 15 April 2024 (77176)

I accidentally placed the analysis for this test as a comment on the wrong alog. Thanks Vicky for pointing this out!

See here for the optical gain and DARM offset plots.

jennifer.wright@LIGO.ORG - 16:34, Monday 15 July 2024 (79146)

I added a plot showing the loss ( inverse of the slope of attached graph) between the input of HAM 6 (AS port) and the DCPDs as in this entry.

This loss term is 1/1.247 = 0.802 with 653.7 mW of light insensitive to DARM at the AS port.

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