P2.6 Tip-Tilt internal fast loop test with ASM turbulence

• Phase : 2
• Status : Draft
• Category : Daytime testing (functionality and operability) (C3)
• Recurrence : after instrument installation at telescope platform
• Duration : 1 day

Description

• To verify the SHARK-NIR internal fast tip-tilt loop (using CRED2 and SHARK-NIR ALPAO DM) using the ARGOS light source (only at zenith) for various seeing conditions (0.5", 0.8") simulated at the ASM. This test will verify if the correction of the fast tip-tilt loop is affected by the residual turbulence for star at different magnitudes.

Prerequisites

• Knowledge of Argos light source magnitude and the possibility to tune its brightness.

Procedure

• Use ARGOS light source (to be used only at zenith) and direct light towards SHARK-NIR.
• Close the SOUL AO loop to have the best ASM shape. Keep the ASM static with the best shape.
• Close the SHARK-NIR internal tip-tilt loop.
• Take 10mins of data at the CRED2 (at loop frame rate) and SCICAM.
• Introduce 0.5" seeing at the ASM and close the loop.
• Close the SHARK-NIR internal tip-tilt loop.
• Take 10mins of data at the CRED2 and SCICAM.
• Introduce 0.8" seeing at the ASM and close the loop.
• Close the SHARK-NIR internal tip-tilt loop.
• Take 10mins of data at the CRED2 and SCICAM.
• Repeat the above steps for the selected brightness of the Argos light source

Templates

Success criteria

• SHARK-NIR fast tip-tilt loop working efficiently within the requirements in all the seeing conditions.

Notes

• For the SN team: know in advance how many minutes of data can be downloaded from CRED2 or the ring-buffer size.

LBTO support

• Authorize SHARK-NIR
• Permission to use SX-ASM and LBTI-AO
• SOUL-LBTI AO support
• AO support

Date performed and by whom November 10th Luca, Daniele, Elena and remote support by Fulvio