Component Manual for the Neutron Ray-Tracing Package McStas, version 3.8.6

14.24  The FlatEllipse_finite_mirror McStas Component

Date: 2022-2023

NMO (nested mirror optic) modules

Identification

Description

Simulates NMO (nested mirror optic) modules as concevied by Böni et al., see Christoph Herb et al., Nucl. Instrum. Meth. A 1040, 1671564 (1-18) 2022.

The component relies on an updated version of conic.h from MIT.

Input parameters

Parameters in boldface are required; the others are optional.

Name

Unit

Description

Default

sourceDist

m

Distance used for calculating the spacing of the mirrors

0

LStart

m

Left focal point

0.6

LEnd

m

Right focal point

0.6

lStart

m

z-Value of the mirror start

0.0

lEnd

m

z-Value of the mirror end

0.0

r_0

m

distance to the mirror at lStart

0.02076

nummirror

1

number of mirrors

9

mf

mvalue of the inner side of the coating, m>10 results in perfect reflections

4

mb

mvalue of the outer side of the coating, m>10 results in perfect reflections

0

R0

1

Low-angle reflectivity

0.99

Qc

Å\(^{-1}\)

critical scattering vector

0.021

W

Å\(^{-1}\)

width of supermirror cutoff

0.003

alpha

Å

Slope of reflectivity

6.07

mirror_width

m

width of the individual mirrors

0.003

mirror_sidelength

m

side length of the individual mirrors

1

doubleReflections

1

binary value determining whether the mirror backside is reflective

0

rfront_inner_file

str

file of distances to the optical axis of the individual mirrors

"NULL"

Links