CalculateSlits v1¶

CalculateSlits dialog.

Table of Contents

Summary
Properties
Description
Usage
Source

Summary ¶

Calculates appropriate slit widths for reflectometry instruments.

Properties ¶

Name	Direction	Type	Default	Description
Slit1Slit2	Input	number	Optional	Distance between slit 1 and slit 2 in mm
Slit2SA	Input	number	Optional	Offset in the beam direction in mm
Resolution	Input	number	Optional	Resolution
Footprint	Input	number	Optional	Footprint in mm
Angle	Input	number	Optional	Angle in degrees
Slit1	Output	number		Slit 1 width in mm
Slit2	Output	number		Slit 2 width in mm

Description ¶

This algorithm can be used to calculate the slit dimensions to use for reflectometry instruments. It is effectively the inverse of CalculateResolution v1.

CalculateSlits uses nothing but the input properties to calculate the output, specifically:

$Slit2 = (Footprint \times sin\alpha) - (2 \times Slit2SA \times tan(\alpha \times Resolution)) Slit1 = (2 \times Slit1Slit2 \times tan(\alpha \times Resolution)) - Slit2$

where $\alpha$ is the angle in radians.

Usage ¶

s1, s2 = CalculateSlits(Slit1Slit2=1940.5, Slit2SA=364, Angle=0.7, Footprint=50, Resolution=0.03)
print("Slit 1: %.3f mm" % s1)
print("Slit 2: %.3f mm" % s2)