== P3.4	Pupil alignment == 
•	**Phase**		:	3  
•	**Status**		: 	Draft	 
•	**Category**		: 	Nighttime testing (functionality and operability) (C4)
•	**Recurrence**	: 	before every observing target (CI, LSS), starting from commissioning.
•	**Duration**		: 	2.5 hours
**Description**
•	Alignment of the internal pupil image with apodizer (at PP1) or Lyot stop (at PP2) in the coronagraphic mode 
**Prerequisites**
•	Bad pixel map, Background or Dark, Flat-field, detector RON 
**Procedure**
•	The position of the first tip-tilt mirror (IN_TT) is optimized in order to have the first pupil image centered with the apodizer/Lyot stop. This is obtained comparing the pupil image, formed on the SCICAM, with the image of the apodizer, obtained on the SCICAM using the calibration fiber as a source. 
**Success criteria**
•	Expected accuracy: 0.25% of pupil image diameter ~17arcsec of the TTM ~1.5pixel SCICAM ~30μm at the level of the SCICAM.
**Notes**
•	Same as activity 8.2 in AD4
**LBTO support**


**Associated SHARK-NIR personnel**


**Date performed and by whom**

**Comment**

KR, EC, DV: Should we do this also for Lyot Stops (Lyot_Grism_W) or PP2? Do we need to do the pupil alignment for the Prism or Grism (we think not)? Considering 5 cases (3 + 2) and 30 mins / case, we put 2.5 hours in total above. DV: yes, I confirm we need this procedure also for Lyot Stops on PP2. We started iterations with Depa/DavideR to adapt the template. DG: No fine alignment should be required for prism and grism every time we need them in night-time. We do not expect flectures strong enough to introduce vignetting, but we will have to ckeck it with tests.