On telescope work (MB, SR, ML)
9:00: up on telescope to put back
LgswUnitSx red EW that was moved when cleaned...
Then we check the
LgswUnitDx that had a spot on the Yellow pupil. The internal calibration unit is ok, we check with external source and the shade is still there, we measure a factor 7 in loss of light. The shade is still while moving both the Pupil motor and the PI mirror. We suspect a problem with the Pockels cell... The
LgswUnitDx must be craned off.
We also route the new fibers in the
LgswRack2:
13:30: we start to crane down the
LgswUnitDx
15:30:
LgswUnitDx is in clean room
18:30: servicinig finished: PC yellow exchanged with spare, Pat cams cleaned, EW cleaned
Then we try to acquire IMs independently for the 3 WFS and to merge them in a single IM:
- Yellow IM: 20161013_184308
- Blue IM: 20161013_185455
- Red IM: 20161013_185810
the total IM is:
From the new IM we calculate the new RECs:
- LGSW REC: 20161015_000600
- COMBO only LGSW REC: 20161015_000700
- COMBO PyrBin2 + LGSW REC: 20161015_000800
- COMBO PyrBin4 + LGSW REC: 20161015_000900
- COMBO QC + LGSW REC: 20161015_001000
We test the Truth Sensing changing the flux on the Pyramid WFS and adding a disturbance equivalent to 1" seeing.
TN |
AO Gain |
AO CL |
TT Res. WF [nm rms] |
HO Res. WF [nm rms] |
AO rec |
DIMM ["] |
JCL |
PCL |
Notes |
20161014_193018 |
0.2,0.1,0.05 |
T |
125.429 |
27.3082 |
20161013_194100 |
-1 |
T |
F |
mag=9, no dist |
20161014_194352 |
0.2,0.1,0.05 |
T |
123.252 |
27.0559 |
20161013_194100 |
-1 |
T |
F |
20161014_194902 |
0.5,0.5,0.4 |
T |
78.1559 |
39.312 |
20161013_194100 |
-1 |
T |
F |
20161014_195138 |
0.5,0.5,0.4 |
T |
76.7463 |
39.6749 |
20161013_194100 |
-1 |
T |
F |
20161014_202656 |
0.5,0.5,0.4 |
T |
174.61 |
36.1368 |
20161013_194100 |
-1 |
T |
F |
mag=15, no dist |
20161014_202713 |
0.5,0.5,0.4 |
T |
189.281 |
36.0788 |
20161013_194100 |
-1 |
T |
F |
20161014_202931 |
0.5,0.5,0.4 |
T |
177.245 |
59.3486 |
20161013_194100 |
-1 |
T |
F |
mag=15, 1" dist |
20161014_203002 |
0.5,0.5,0.4 |
T |
185.801 |
59.3445 |
20161013_194100 |
-1 |
T |
F |
20161014_203120 |
1.2,0.5,0.4 |
T |
141.864 |
63.6206 |
20161013_194100 |
-1 |
T |
F |
20161014_205248 |
0.4,0.5,0.4 |
T |
192.874 |
63.0017 |
20161013_194100 |
-1 |
T |
F |
mag=16, 1"dist |
20161014_205311 |
0.4,0.5,0.4 |
T |
194.135 |
59.826 |
20161013_194100 |
-1 |
T |
F |
20161014_205327 |
0.4,0.5,0.4 |
T |
186.203 |
59.9054 |
20161013_194100 |
-1 |
T |
F |
20161014_205439 |
0.4,0.5,0.4 |
T |
204.549 |
60.8431 |
20161013_194100 |
-1 |
T |
F |
20161014_205620 |
0.4,0.5,0.4 |
T |
210.714 |
65.5995 |
20161013_194100 |
-1 |
T |
F |
NB: the Combo reconstructor
20161013_194100 is based on the IM obtained merging three IM, acquired independently for the 3 WFS. The new IM was not saved and the REC contain the tag of the BLUE IM, in this way the Truth Sensing used the BLUE IM to calculate the
SlopesOffset vector. This is conceptually wrong because the BLUE IM was acquired looking only the BLUE sensor, the YELLOW and RED WFSs were not properly illuminated. The
SlopesOffset vector calculated by the Truth Sensor is not the better representation of the Modes coming from the Pyramid. The Truth Sensor minimize the
PyramidModes and, even in this condition, the loop converges to the better static shape of the ASM. The static shape of the ASM is the final
SlopesOffset vector projected with the REC in to the modal basis. The figure below is static wavefront measured with high flux (mag=9) and without the disturbance.
Reducing the NGS flux and adding the disturbance we obtain very similar results. Below the graph shows in the modal basis the shape of the ASM. The Modal Offset is the average of 20 measures.
The plot below shows the Standard Deviation of the 20 measures in the three cases. The Std increase if we decrease the light on the Pyramid and if we add the disturbance.
We save the new Slopes Offset vector:
--
TommasoMazzoni - 15 Oct 2016