Changes between Version 21 and Version 22 of docs/CommissioningPlan/P2.6


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Timestamp:
08/26/22 15:19:18 (2 years ago)
Author:
kradhakrishnan
Comment:

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  • docs/CommissioningPlan/P2.6

    v21 v22  
    1 == P2.6 SHARK-NIR system-level characterization at different telescope elevations ==
     1Cryostat Cooldown and Science detector calibrations ==
    22
    33- **Phase**             :       2 
    44- **Status**            :       Draft   
    5 - **Category**  :       Daytime testing (functionality and operability) (C3) + Daytime calibration (C4)
    6 - **Recurrence**        :       once after instrument installation at telescope platform
    7 - **Duration**  :       6 days
     5- **Category**  :       Daytime testing (functionality and operability) (C3) + Daytime calibration (C4) 
     6- **Recurrence**        :       after instrument installation at telescope platform
     7- **Duration**  :       1 day
    88
    99**Description**
    10 - SHARK-NIR system-level characterization and optimization as a function of the telescope elevation. Checking the pointing offset between SHARK-NIR, LBTI, and SOUL-AO. SOUL-AO tests. Measure the Non-Common Path Aberrations (NCPA).
     10- At the beginning of the next run, the cryostat is cooled down and the science detector calibrations are performed (when at the telescope).
    1111
    1212**Prerequisites**
    13 - Use the Argos swing arm / RR mounted on the SX side. SHARK-NIR aligned to telescope.
    14 - Phase-diversity algorithm is tested and working in simulation and using real images from the SCICAM (at Padova).
    15 
    16 **Procedure for pointing offset measurements and characterization**
    17 - TBW
    18 
    19 **Procedure for SOUL-AO tests**
    20 - TBW
    21 
    22 **Procedure for NCPA**
    23 - Go to a specific elevation of the telescope.
    24 - Close the AO loop for the on-axis light source to produce the best PSF at the pin of the pyramid of the SOUL WFS. Keep that shape steady on ASM.
    25 - Now, optimize the PSF shape on the SCICAM using the trial & error algorithm. The ALPAO-DM on the SHARK-NIR Bench is used to apply different modes. [Currently, this is the baseline approach].
    26 - For the same elevation, keeping the same ASM shape as before and the same source, perform the phase-diversity test (with flat ALPAO-DM), using the Wollaston prism and dual-band imager lens configuration. Apply the obtained NCPA on the ALPAO DM within SHARK. Take SCICAM images to see the improvement. [In case the NCPA produced by the baseline approach is not stable enough for a longer period, and if more correction seems necessary for high contrast, we will be implementing this approach (for which we will be using the star itself as the source during nighttime)].
    27 - Note that in the above two cases, the optical path contains the same optics (except for the Wollaston and DBI lens), including the dichroic and IN_TT of the deployable arm.
    28 - Repeat these measurements for the decided discreet zenith angles (or elevation of the telescope) and SHARK-NIR DROT angle (fixed).
    2913
    3014
     15**Procedure**
     16- For the cryostat cool down, follow P1.4 and P1.5
     17- For science detector calibrations follow P1.7
     18
    3119**Templates**
    32 - SHARKNIR_di_cal_NCPA (not released)
    33  
     20
    3421**Success criteria**
    35 - Estimate the pointing offset and conclude if it is acceptable or not. If not acceptable, take proper actions to overcome this issue.
    36 - The SOUL-AO system is working in tandem with the SHARK-NIR system.
    37 - Acceptable improvement of the on-axis PSF (Argos Swing arm calibration light source) while SOUL AO is closed with known disturbances.
    38 - NCPA estimated and applied on the ALPAO-DM.
    39 - Satisfactory PSF quality with closed-loop.
    40 - The total residual after NCPA correction should be <30nm.
     22- Cryostat cooled down.
     23- SHARK-NIR working normally.
     24- Science calibrations are performed and new values are saved.
    4125
    4226**Notes**
    43 - See activity 8.1 in AD4 for more details.
     27- Support from the Steward Observatory detector team.
    4428
    4529**LBTO support**
    46 - Authorize SHARK-NIR on the SX side.
    47 - Permission to use the Argos Swing Arm.
    48 - RR will be required on the SX side when not using the Argos swing arm and for different elevation angle tests.
    49 - AO support.
     30- Follow P1.4 and P1.5 (for the cryostat cool down)
    5031
    5132**Date performed and by whom**
    52