P1.6 Cryostat cool down

• Phase : 1
• Status : Draft
• Category : Unpack, Assemble, and Verification (C1)
• Recurrence : once
• Duration : 0.5 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)).

Procedure

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

Templates

Success criteria

• Cryostat cooled down without any issues.
• The temperature at the detector is stable at ~78K.

Notes

• This activity can run in parallel with other cleanroom activities (which do not need a cold detector).

LBTO support

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

Date performed and by whom