P3.9 Internal TT loop working and performance

• Phase : 3
• Status : Draft
• Category : Nighttime testing (functionality and operability) (C4)
• Recurrence : once at commissioning
• Duration : 2 hours

Description

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

Prerequisites

• Atmospheric conditions: ?
• Authorize SHARK-NIR on the SX side.
• Stars (of known brightness from 8mag-13mag in R band) as targets.
• AO 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? we can chose stars accordingly then?

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

• SOUL-AO support

Associated SHARK-NIR personnel

Date performed and by whom