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McXtrace: SAXS_saxlab

[ Identification | Description | Input parameters | Output parameters | Links ]

The SAXS_saxlab Instrument

Model of a x-ray tube based SAXS instrument built by SAXSLAB.


  • Site: SAXSLAB
  • Author:
  • Origin:
  • Date:


The small-angle scattering (SAXS) instrument generally consists of the following parts:
the X-ray source ( the system includes rotating copper anode and KB multilayermirrors),
a pinhole collimation system and a detector.

The geometry of this instument is such that an x-ray source (turned 45 deg.) shines light
on Montel mirror pair. The mirror pair is mounted such that the doubly reflected radiation
is deflected downwards (negative y-axis). This means the the mirror join is pointing upwards, and th
mirrors themselves extending +-45 degrees downwards.
There are slits attached to the mirror exits
This arrangement is designed to closesly resemble the SAXSlab system installed at
NBI (University of Copenhagen)

The evolution of the beam is tracked using a series of 2D PSD monitors situated along the beam axis,
which points slightly down.
In real life the beam axis is parallel to the ground and the source is shining slightly upwards.

Input parameters

Parameters in boldface are required; the others are optional.
GammadegNominal mirror glancing angle1.2
S1mDistance from the source to the multilayer's surface.045
S2 .9
EnergykeVPrimary energy of the photon beam8.05
mirrorin Flag controlling whether or not the mirror is active.3
pin1 Flag controlling whther the 1st pinhole is active.1
pin2 Flag controlling whther the 2nd pinhole is active.1
pin3 Flag controlling whther the 3rd pinhole is active.1
Lpsd1mDistance from mirror centre to 1st diagnostic PSD.0.160
Lpsd2mDistance from vacumm chamber entry to 2nd diagnostic PSD.0.15
Lpsd3mDistance from vacumm chamber entry to 3rd diagnostic PSD.1.2
detPosmDistance from vacuum chamber entry to Detector.1.41


[ Identification | Description | Input parameters | Output parameters | Links ]

Generated on 2022-02-07 21:31:39

Last Modified: Wednesday, 11-May-2022 22:46:11 CEST
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