Name

Unit

Description

Default

ring_nr

radius_m

m

Ring radius of the upper (reflecting) plate of the shell at the optic centre.

Z0

m

Distance between optics centre plane and focal spot (essentially focal length).

xwidth

yheight

m

Height of the shell.

gap

m

Gap between the plate and the intersection plane with the hyperbolic section. (currently ignored)

0

chamferwidth

m

Width of side walls.

0

length

0

mirror_reflec

Data file containing reflectivities of the reflector surface (TOP).

””

bottom_reflec

Data file containing reflectivities of the bottom surface (BOTTOM).

””

R_d

Default reflectivity value to use if no reflectivity file is given. Useful f.i. is one surface is reflecting and the others absorbing.

1

primary

If non-zero, the shell is considered a primary reflector, and extends towards negative z. I.e. the entry plane is behind the z=0-plane. If zero, the shell is considered secondary

1

dalpha

deg

Offset to the alpha angle computed from the focal length. Useful for targeting the modified conical geometry (currently ignored).

0

waviness

rad

Waviness of the shell reflecting surface. The slope error is assumed to be uniformly distributed in the interval [-waviness:waviness].

0

longw

If non-zero, waviness is 1D and along the shell axis.

0