P1.6 Cool down the cryostat

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

Description

• Cooldown the cryostat.

Prerequisites

• SHARK-NIR connected to LBT network.
• Electronics cabinets on.
• Needs vacuum pumping at the beginning (vacuum pressure of 10e-5 Torr is good (see the cryostat manual SHARK-NIR_SO-MAN-001).
• Liquid nitrogen pumped?

Procedure

• Start the cryostat cooling down sequence (see the cryostat manual SHARK-NIR_SO-MAN-001).
• Check how the system is performing every 30 minutes

Success criteria

• Cryostat cooled down without any issues.
• The temperature at the detector is stable at 77K

Notes

LBTO support

• Liquid Nitrogen refill is required in the cleanroom.
• Vacuum pump and support for cooling down the cryostat.

Associated SHARK-NIR personnel

Date performed and by whom

Comments LM: I do not see liquid nitrogen pumped as a prerequisite, but rather part of the procedure