Changes between Version 6 and Version 7 of docs/CommissioningPlan/P3.9


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Timestamp:
01/14/22 18:53:22 (3 years ago)
Author:
kradhakrishnan
Comment:

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  • docs/CommissioningPlan/P3.9

    v6 v7  
    1  == P3.9        Internal TT loop working and performance==
    2 •       **Phase**               :       3 
    3 •       **Status**              :       Draft   
    4 •       **Category**            :       Nighttime testing (functionality and operability) (C5) + Nighttime testing for performance (C7)
    5 •       **Recurrence**  :       once at commissioning
    6 •       **Duration**            :       1 night
     1 == P3.9        NCPA working and performance & checking for pupil shifts ==
     2 
     3- **Phase**             :       3 
     4- **Status**            :       Draft   
     5- **Category**  :       Nighttime testing (functionality and operability) (C5) + Nighttime testing for performance (C7)
     6- **Recurrence**        :       once at commissioning
     7- **Duration**  :       3 nights
     8
    79**Description**
    8 •       Evaluate the performance of the internal tip-tilt (TT) loop of SHARK-NIR for stars of varying brightness.
     10- Evaluate the NCPA working and performance using the baseline approach, phase-diversity approach using the Wollaston prism & dual-band imaging, and measurement of NCPA using SHARK-NIR internal calibration sources.
     11
    912**Prerequisites**
    10 •       Atmospheric conditions: TBD
    11 •       Authorize SHARK-NIR on the SX side.
    12 •      Stars (of known brightness from 8mag-13mag in R band) as targets.
    13 •       AO working.
     13- Atmospheric conditions: TBD
     14- Authorize SHARK-NIR on the SX side.
     15- AO is working.
     16- Target(s) at different Zenith distances with different magnitudes.
     17- lookup tables of already calibrated NCPA measurements.
     18
    1419**Procedure**
    15 •       Run the internal TT loop after the star is acquired and the AO loop is closed.
    16 * Take unsaturated images of the star for a given (?) science filter before and after the internal TT loop closure in the SCICAM.
    17 * Take data in TECCAM simultaneously.
    18 * Use data to estimate the improvement of the residual jitter after the TT loop is closed.
    19 * Repeat for different star magnitudes.
    20 * should we perform as a function of elevation as well? we can choose stars accordingly then?
     20- Acquire a star of a given magnitude, start SOUL-AO, followed by the internal-TT loop.
     21- Check the working and performance of the NCPA (already calibrated) baseline approach. Take images at SCICAM.
     22- Check the phase diversity NCPA approach using Wollaston prism + DI-DBI (already calibrated). Take images at SCICAM.
     23- If the PSF after applying the calibrated NCPA is bad, we could close the SHARK-NIR shutter (can have the SOUL-AO running parallel) and do a quick internal NCPA measurement (either till the NCPA modal coefficients or until the new shape on ALPAO-DM) to confirm that the alignment of SHARK-NIR is still good. This would mean that the NCPA already calibrated is not good enough!
     24- Measure the phase diversity NCPA approach using Wollaston prism + DI-DBI  and using real star (need to do on the spot, but script exists). Take images at SCICAM.
     25- Check the pupil position by inserting the pupil lens.
     26- Repeat for a different star (of various magnitudes and for a different telescope elevation). It is also good to do this for other seeing conditions.
     27
     28**Templates**
    2129
    2230**Success criteria**
    23 •       Estimate the residual jitter after SOUL-AO is closed for a given seeing and star brightness.
    24 * Checking the working and performance of the internal TT loop.
    25 * Quantify and numbers to add?
     31- NCPA estimated and applied on the ASM / ALPAO DM.
     32- Cross-check the NCPA performances with the daytime activity [wiki:/docs/CommissioningPlan/P2.6 P2.6].
     33- The total residual after NCPA correction should be <30nm.
    2634
    2735**Notes**
    2836
    2937**LBTO support**
    30 •       AO support
    31 
    32 **Associated SHARK-NIR personnel**
     38- AO support
    3339
    3440**Date performed and by whom**
     41
     42**comment**
     43- perform for 5 cases e.g. Rmag 8, 10, 10, 12, 14. These five cases where the star has different mag and at different zenith angles over different nights (so different seeing).