P3.3 Pupil alignment

• Phase : 3
• Status : COMPLETE
• Category : Nighttime testing (functionality and operability) (C5) + Nighttime calibration (C6)
• Recurrence : before every observing target (CI, LSS), starting from commissioning.
• Duration : 2 hours

Description

• Alignment of the internal pupil image with apodizer (at PP1) or Lyot stop (at PP2) in the coronagraphic mode

Prerequisites

• Bad pixel map, Background or Dark, Flat-field, detector RON

Procedure

• The position of the first tip-tilt mirror (IN_TT) is optimized in order to have the first pupil image centered with the apodizer/Lyot stop. This is obtained by comparing the pupil image, formed on the SCICAM, with the image of the apodizer, received on the SCICAM using the calibration fiber as a source.

Templates

• SHARKNIR_gen_tec_PupilApoAlignment
• SHARKNIR_gen_tec_PupilLyotAlignment

Success criteria

• Expected accuracy: 0.25% of pupil image diameter ~17arcsec of the TTM ~1.5pixel SCICAM ~30μm at the level of the SCICAM.

Notes

• Same as activity 8.2 in AD4
• Template: SHARKNIR_gen_tec_PupilAlignment

LBTO support

• AO support

Date performed and by whom