Influence of misalignments on the performance of externally occulted solar coronagraphs - Application to PROBA-3/ASPIICS

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Volume 612 (April 2018)

A&A, 612 (2018) A82

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Table 2

Parameters used in our numerical study taken from the ASPIICS configuration.

Parameter	Symb.	Value
Wavelength	λ	550 nm
Angular radius of the Sun	R_⊙	16 arcmin
Radius of the EO	R_EO	710 mm
Distance plane O – plane A	z₀	144 348 mm
Angular radius of the EO	ω_EO	16.909 arcmin
Radius of the entrance aperture	R_A	25.0 mm
Focal length of L1	f	330.348 mm
Distance plane A – plane O′	z₁	331.143 mm
Radius of the internal occulter	R_IO	1.662 mm^a
Hole in the internal occulter^b	r_IO	0.489 mm
Lyot stop radius	R_C	0.97R_A (24.25 mm)^c

Notes. See text for details. ^(a) The value that we use as a baseline for the diffracted light. ^(b) A hole in the internal occulter is used to produce images of LEDs from the occulter satellite on the detector. ^(c) The relative size of the entrance aperture and the Lyot stop plays a role.

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