In the morning telescope is dedicate to LUCI1 MOS exchange.

12:15: telescope released, SX and DX CalUnit deployed.

LgswUnitSx FoV measurement

We do a sweep of +/-10" in 11 steps:

20160309_194400_fov_centers.png

Results are very similar to yesterday's ones. However we did a mistake in the Rx and Ry determination. We measure the centers to be:

Pupil [Rx; Ry] PI
Blue [95.0; -128.0] [-0.60; -2.05]
Yellow [93.5; -130.3] [-4.00; 0.90]
Red [93.5; -132.0] [-3.40; 4.20]
From these position we saved a new jitter initial position: 20160309_213300

Hexa 4.80 1.00 -0.71 93 -128

LgswUnitSx closed loop test

We try to close with LGSW only:

TN AO Gain Res. WF [nm rms] AO rec DIMM ["] JCL PCL Notes
20160309_210756 0.2,0.1,0.05 229.449 20151212_220700 -1 F F
We also acquire a new set for pupil motors positions:

Pupil X Y
Blue 350 421
Yellow 341 438
Red 525 412
and we save a new pupil target tag: 20160309_213652

Then we load a disturb equivalent to 1" seeing:

TN AO Gain Res. WF [nm rms] AO rec DIMM ["] JCL PCL Notes Plot
20160309_212842 0.5,0.5,0.5 229.2 20151212_220700 -1 F F 20160309_212842-20160309_215956_modalplot.png
20160309_212856 0.5,0.5,0.5 237.568 20151212_220700 -1 F F
20160309_212952 0.5,0.5,0.5 251.417 20151212_220700 -1 F F
20160309_214244 0.5,0.5,0.5 203.056 20151212_220700 -1 F F
20160309_215956 0.5,0.5,0.5 221.59 20151212_220700 -1 F F

Hexa 4.80 1.00 -0.65 93 -128
Board -74.3 -53.7 45.0    
LUCI1 rotator was set to 341deg and the pupil derotator of FLAO was at 0deg.

We also measure the PCT of SX using CalUnit, since we noticed a drop in performance of the red PC:

Side PCT
SX 20160309_223333_pcTransmission.jpg
Then we close the loop using the Pyramid as TT sensor (BIN2). Disturb was set to 1". Thruth sensing was on:

TN AO Gain Res. WF [nm rms] AO rec DIMM ["] JCL PCL Notes
20160309_231432 1,0.45,0.4 77.762 20151212_233400 -1 T F
20160309_231458 1,0.45,0.4 78.1656 20151212_233400 -1 T F
20160309_231639 1,0.5,0.45 81.3405 20151212_233400 -1 T F

We try to reduce the gain of the 2 astigmatism modes to check if we could have better performance (astigmatism modes have a bigger residual rms than focus and other nearby modes).
TN AO Gain Res. WF [nm rms] AO rec DIMM ["] JCL PCL Notes Plot
20160309_232027 1,0.5,0.45 79.4328 20151212_233400 -1 T F Gasti= 0.4 20160309_232027-20160309_232209_modalplot.png
20160309_232045 1,0.5,0.45 77.5719 20151212_233400 -1 T F
20160309_232105 1,0.5,0.45 82.5853 20151212_233400 -1 T F Gasti= 0.2
20160309_232123 1,0.5,0.45 83.4946 20151212_233400 -1 T F
20160309_232156 1,0.5,0.45 82.8725 20151212_233400 -1 T F Gasti= 0.6
20160309_232209 1,0.5,0.45 80.7496 20151212_233400 -1 T F

PockelsCellsTransmission test

Side PCT
DX 20160309_234259_pcTransmission.jpg
20160310_044853_pcTransmission.jpg
SX 20160310_000000_pcTransmission.jpg
20160310_050056_pcTransmission.jpg

LgswUnitDx subapertures definition

We start from 20151016_170000 subapertures set. This is a CoG set, with Internal source pattern. We define a new set for TCoG48: 20160309_235100

To produce a on-sky pattern of subapertures we must remove the central ones (89 on Blue, 266 on Yellow and 443 on Red) and the top row of the Blue pupil ( 66, 81, 96, 111, 126).

We create a new set using as centres:

Pupil Cx Cy
Blue 197 128
Yellow 78 69
Red 79 194
So we have the following subap sets for DX-LGSW:

  • CoG, on-sky: 20160310_000700
  • TCoG48, on-sky: 2060310_000900
Topic revision: r1 - 10 Mar 2016, MarcoBonaglia
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