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Tue Oct 1 18:35:12 2019
Beam centering campaign
With TRX and TRY maximized using ASS, I centered the Oplev spots on the respective QPDs for the four test masses and the BS. I also centered the spot onto the IPPOS QPD by moving the available steering mirror.
At EX, I tweaked the input pointing of the green beam into the arm by manually twiddling with the PZT mirrors. I was able to get GTRX~0.4.
On the AS table - Koji and I found that there was a steering mirror placed in the AS beam path such that there was no light reaching the AS110 or AS55 PDs.
Please - when you are done with your measurement, return the optical configuration to the state it was in before
so that the usual locking activity isn't disturbed by a needless few hours troubleshooting electronics.
Once Koji is done with his checkout of the whitening electronics, I will try and lock the PRMI.