Phase Camera 1: Ring Alignment Shift 19 Jan 09

The goal of this experiment is to try and centre better the WI CO2 ring
and to measure the time constant of the thermally enduced lens.
West arm locked, other elements misaligned, OMC out of resonance.
TCS mirror position UL = 5900, BR = 1200
ring power 15 W
ring shutter switched on at gps 916429074
ring shutter switched off at gps 916434890
The under figure shows a phase image just before switching the shutter off.


The next figures show the profile of the phase:



The next goal is to check alignment of TCS central spot and ring on North input since modifications made ttime ago.
North arm locked, other elements misaligned, OMC out of resonance.
TCS mirror position UL = 451, BR = 4025
Central spot power set to 130 mW
central spot shutter switched on at Time: Jan19,09-22:48:53 GPS: 916436948

Make confirmation of TCS mirror sign convention
Move BR 4025 to 4225 Time: Jan19,09-22:51:43 GPS: 916437118
Beam on phase camera moves to left

Centre better the beam
Move UL from 451 to 551 Time: Jan19,09-22:53:13 GPS: 916437208

central spot shutter switched off at Time: Jan19,09-22:58:13 GPS: 916437508

ring power set to 11.8 W
ring shutter switched on at Time: Jan19,09-23:20:40 GPS: 916438855
ring shutter switched on at Time: Jan19,09-23:51:11 GPS: 916440686



The under figure shows a phase image just before switching the shutter off.