== P1.6	Cool down the cryostat  == 
•	**Phase**		:	1  
•	**Status**		: 	Draft	 
•	**Category**		: 	Unpack, Assemble, and Verification (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)).
**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**
* 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.
**Associated SHARK-NIR personnel**

**Date performed and by whom**

**Comments**