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Polycapillary Optics for Materials Science Studies: Instrumental Effects and Their Correction.

M Leoni1, U Welzel2, P Scardi1

  • 1Università di Trento, Dipartimento di Ingegneria dei Materiali e Tecnologie Industriali, Via Mesiano 77, 38050 Trento ( Italy).

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|July 2, 2016
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Summary
This summary is machine-generated.

This study models instrumental effects of polycapillary x-ray lenses used as beam collimators. Monte Carlo ray-tracing and a correction algorithm demonstrate improved measurement accuracy.

Keywords:
instrumental effectsparallel beam geometrypolycapillary opticsresidual stress analysistexture analysisx-ray diffractionx-ray optics

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Area of Science:

  • X-ray optics
  • Instrumentation
  • Scientific measurement

Background:

  • Polycapillary x-ray lenses are utilized as primary beam collimators in various scientific applications.
  • Understanding and mitigating instrumental effects are crucial for accurate measurements.
  • Existing procedures for accounting for these effects may have limitations.

Purpose of the Study:

  • To investigate and model the instrumental effects associated with using a polycapillary x-ray lens as a primary beam collimator.
  • To compare the performance of this setup with existing procedures.
  • To demonstrate the accuracy improvements achieved through a novel correction algorithm.

Main Methods:

  • Utilizing Monte Carlo ray-tracing simulations to model the features observed in measurements.
  • Conducting experimental measurements to validate simulation results.
  • Implementing and evaluating a correction algorithm to enhance accuracy.

Main Results:

  • The study successfully modeled instrumental effects using Monte Carlo ray-tracing.
  • A comparison revealed discrepancies with existing procedures.
  • Experimental evidence confirmed significant accuracy improvements after applying the correction algorithm.

Conclusions:

  • Polycapillary x-ray lenses, when used as beam collimators, introduce specific instrumental effects that can be accurately modeled.
  • The developed correction algorithm offers a substantial improvement in measurement accuracy compared to existing methods.
  • This work provides a validated approach for enhancing the precision of x-ray measurements utilizing polycapillary optics.