== 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**