P3.7 Internal TT loop working and performance

• Phase : 3
• Status : COMPLETE
• Category : Nighttime testing (functionality and operability) (C5) + Nighttime testing for performance (C7)
• Recurrence : once at commissioning
• Duration : 3 hours

Description

• Evaluate the performance of the internal tip-tilt (TT) loop of SHARK-NIR for stars of varying brightness.

Prerequisites

• Atmospheric conditions: TBD
• Authorize SHARK-NIR on the SX side.
• Stars (of known brightness from 8mag-13mag in the R band) as targets.
• AO is working.

Procedure

• Run the internal TT loop after the star is acquired and the AO loop is closed.
• Take unsaturated images of the star for a given (?) science filter before and after the internal TT loop closure in the SCICAM.
• Take data in TECCAM simultaneously.
• Use data to estimate the improvement of the residual jitter after the TT loop is closed.
• Repeat for different star magnitudes.
• should we perform as a function of elevation as well? Can we choose stars accordingly, then?

Templates

• SHARKNIR_gen_tec_CloseLoop.doc
• SHARKNIR_gen_tec_OpenLoop.doc

Success criteria

• Estimate the residual jitter after SOUL-AO is closed for a given seeing and star brightness.
• Checking the working and performance of the internal TT loop.
• Quantify and numbers to add?

Notes

LBTO support

• AO support

Date performed and by whom