Component Manual for the Xray-Tracing Package McXtrace, version 3.8.6

12.11  The SAXSQMonitor McXtrace Component

Release: McXtrace 1.0

A circular detector measuring the radial average of intensity as a function of the momentum transform in the sample.

Identification

Description

A circular detector measuring the radial average of intensity as a function of the momentum transform in the sample. The q-range is set up to qMax = 4 * PI * sin(TwoThetaMax / 2.0) / LambdaMin;

Example: SAXSQMonitor( RadiusDetector = 0.1, DistanceFromSample = 0.5, LambdaMin = 1, Lambda0 = 1.54, NumberOfBins = 2000 ) Example: SAXSQMonitor( RadiusDetector = 0.1, qMax = 5, Lambda0 = 1.54, NumberOfBins = 2000 )

Input parameters

Parameters in boldface are required; the others are optional.

Name

Unit

Description

Default

RFilename

str

File used for storing I(r).

”RDetector”

qFilename

str

File used for storing I(q).

”QDetector”

NumberOfBins

1

Number of bins in the r (and q).

100

restore_xray

If set to 1, the component restores the original x-ray.

0

RadiusDetector

m

Radius of the detector (in the xy-plane).

DistanceFromSample

m

Distance from the sample to this component.

LambdaMin

Å

Max sensitivity in lambda - used to compute the highest possible value of momentum transfer, q.

1.0

Lambda0

Å

If given, the momentum transfers of all rays are computed from this value. Otherwise, instrumental effects are negated Lambda0=2PI/k.

0.0

qMax

Å-1

Max momentum for the Q-monitor. use either qMax or LambdaMin.

0

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