P1.6 SCICAM refocussing

• Phase : 1
• Status : COMPLETE
• Category : Unpack, Assemble, and Verification (C1)
• Recurrence : once
• Duration : 1.5 day

Description

• The SCICAM of the SHARK-NIR is believed to be not in-focus position. The detector team at Steward Observatory will have the cryostat at an early stage (prior to SHARK-NIR arriving at LBT) to look into several aspects including the focussing issue. Depending on the outcome of this intervention, refocussing of the cryostat is anticipated.

Prerequisites

• SHARK-NIR is connected to the LBT network.
• Electronics cabinets on.
• Steward Observatory Detector Team has completed the work and the information is passed on to the SHARK-NIR team.
• Cryostat cooled down.

Procedure

• Mount the cryostat to the SHARK-NIR optical bench.
• Use several shims one after the other to take images at the detector.
• Using the through-focus images, find the right shim to have the detector at the focus position.
• Make the shim of the right dimensions.
• Use this shim, and mount the cryostat to the SHARK-NIR optical bench.
• Verify that the final configuration produces focused images.

Templates

Success criteria

• SCICAM is focused.

Notes

LBTO support

• Support to use of the workshop at LBT.

Date performed and by whom