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MIF (General)
kenta.tanaka - 22:21 Wednesday 20 April 2022 (20539) Print this report
PRM cause the glitch in IMMT1 OPLEV signal and POP forword QPD signal

Ushiba, Tanaka

We noticed there are large glitches in both IMMT1 OPLEV signals and POP forward QPD signals. Then we set PRM in MISALIGN state. After misaligning PRM, the glitches are disappeared drastically (fig. 1).

I wonder why the PRM angle causes the glitch in POP forward QPDs...   

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