P2.8 Flexure tests

• Phase : 2
• Status : Draft
• Category : Daytime testing (functionality and operability) (C2)
• Recurrence : once at commissioning
• Duration : 3 hour(s)

Description

• This activity corresponds to the flexure tests for the SHARK-NIR.

Prerequisites

• If relevant, estimate and remove the NCPA using phase-diversity method.
• RR mounted on SX side.

Procedure

• Test the positions of the various opto-mechanical components within the instrument using optical feedback while moving the telescope in elevation.
• Change the velocity and acceleration of the movement of the telescope in elevation if required.
• Remember to perform the tests for all the observing modes (whatever possible with RR or internal light sources)
• You may want to disentangle the flexure of the RR while moving the telescope in elevation by comparing the optical feedback for the same movement with the internal light source.
• This test will also test the working of the LBTO AO system while the telescope is moving in elevation.
• Compare the results with that of Padova flexure tests.

Success criteria

• All the images and data are saved for analysis or to create the lookup table.

Notes

• If the test results are not satisfactory, this activity may be repeated again after making proper countermeasures to reduce the flexure.

LBTO support

• Support from LBTI/LBTO?

Associated SHARK-NIR personnel

• JF, LM, MdP

Date performed and by whom