Changes between Version 20 and Version 21 of docs/CommissioningPlan/P2.7

Timestamp:

09/23/22 13:09:00 (2 years ago)

Author:

kradhakrishnan

Comment:

--

docs/CommissioningPlan/P2.7

@@ -22 +22 @@
 **Procedure for NCPA**
 - Start the tests with telescope pointed to Zenith
+ - Go to a specific derotation angle out of the five we wanted to calibrate/estimate the NCPA.
   1. Using the Argos light source / RR light source, acquire the star at the SOUL WFS. 
   2. Close the AO loop. 
@@ -29 +30 @@
   6. Ideally, contrast is the metric to be used to find the best NCPA shape for the ALPAO DM. However, since the contrast is directly related to the PSF optical quality at the coronagraphic focal plane which is the same (or very close to same) at the scientific focal plane, we will use the SCICAM PSF images to determine the aberrations and therefore to find the best shape to apply on the ALPAO DM.
   7. Only for Zenith angle, the following tests are also performed:
+     - SOUL AO performances are estimated for various brightness of the on-axis source. If it is possible to tune the brightness only for SOUL WFS, that is done. If not, the source's brightness is reduced by introducing ND filters in front of the Ocean Optics (for example). SOUL WFS parameters (binning, number of modes corrected, etc.) are accordingly selected. SCICAM images are taken in every configuration to estimate the correction quality.
+     - Instead of going for the best PSF at the pin of the pyramid of the SOUL WFS, we optimize the ASM shape to have the best optical quality at the SCICAM. This can be done by using the Trial & Error algorithm at the ASM and using images from SCICAM. Or, it can be done by converting the NCPA estimated using the PD algorithm and applying this at the ASM.
+     - Checking the other two NCPA estimation techniques within SHARK-NIR (keeping the ASM shape having the same best flat as in point 4 above): Trial & Error algorithm and the use of Wollaston + DBI lens. Ideally, all three estimations should give the same results within error limits.
+ - Repeat the same steps (except point 7) for the other four derotation angles.
+- Repeat the above steps for the other 4 elevations of the telescope.