Phase Camera 1: Calibration of the Ring WI Shif 16 Jan 09

The goal of this shift was to center the ring on the west input mirrors
and check the negative lens effect in the mirror with the phase camera.


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From Virgo Logbook I report some note:

1000steps=15mm on mirror
external diameter of the ring =22cm

Power (calibration wave plate)
2.7 degrees 150mW on central spot and 1.8W on ring
22.7 degrees 12W on ring
32.7 degrees 16W on ring

WI
go down forward UL
go right forward BR

NI
go down forward
go right backward (TBC!)
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Checked that WI CS centered for
UL 6000
BR 1100
opened CSWI at Jan16,09-18:00:30 GPS: 916160445
closed CSWI at Jan16,09-18:03:22 GPS: 916160617

1rst test
12W WI Ring at Jan16,09-18:07:12 GPS: 916160847
moved BR 1100 to 600 at Jan16,09-18:17:08 GPS: 916161443
moved UL 6000 to 5500 at Jan16,09-18:18:01 GPS: 916161496
moved BR 600 to 1600 at Jan16,09-18:19:38 GPS: 916161593
moved UL 5500 to 5000 at Jan16,09-18:22:18 GPS: 916161753
moved BR 1600 to 2100 at 18:23:48
moved UL 5000 to 4000 at Jan16,09-18:25:31 GPS: 916161946
moved BR 2100 to 3100 at Jan16,09-18:26:53 GPS: 916162028
moved BR 3100 to 2600 at Jan16,09-18:29:15 GPS: 916162170
moved BR 2600 to 2100 at Jan16,09-18:33:35 GPS: 916162430
moved BR 2100 to 1600 at Jan16,09-18:38:06 GPS: 916162701



closed at Jan16,09-18:43:31 GPS: 916163026

2nd test
initial positions
UL 6700
BR 400
12W WI Ring at Jan16,09-19:11:36 GPS: 916164711
moved UL 6700 to 6400 Jan16,09-19:12:47 GPS: 916164782
moved BR 400 to 700 Jan16,09-19:13:06 GPS: 916164801
Ring is centered now (assuming the positive lensing effect corresponds to the center of the ring)





closed at Jan16,09-19:58:44 GPS: 916167539


3rd test
initial positions
UL 6400
BR 700
1.8W WI Ring at Jan16,09-20:15:12 GPS: 916168527

closed at Jan16,09-20:27:46 GPS: 916169281

evolution of profile in X during test2:



evolution of profile in Y during test2:


we moved again the lens L3 towards the axicon and realigned the setup by moving M2 and the axicon (16 W):

nitial positions
UL 6400
BR 700
Checked CS is centered in this position
12W WI Ring at Jan16,09-22:58:17 GPS: 916178312

moved UL 6400 to 6100 at Jan16,09-23:21:59 GPS: 916179734
moved BR 700 to 1000 at Jan16,09-23:22:25 GPS: 916179760
Increased power up to 16Wat Jan16,09-23:22:56 GPS: 916179791

moved UL 6100 to 5600 at Jan16,09-23:31:21 GPS: 916180296
moved BR 1000 to 1500 at Jan16,09-23:32:01 GPS: 916180336

moved UL 5600 to 4600 at Jan16,09-23:41:44 GPS: 916180919
moved BR 1500 to 2500 at Jan16,09-23:43:10 GPS: 916181005
moved UL 4600 to 3600 at Jan16,09-23:49:20 GPS: 916181375

moved BR 2500 to 1500 at Jan16,09-23:54:13 GPS: 916181668
closed at Jan17,09-00:01:53 GPS: 916182128

The next figure show the profile of the phase X and Y: