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$High Pressure Single Crystal Diffraction at PX^2$

High Pressure Single Crystal Diffraction at PX^2

Published on: January 16, 2017

Single-pulse x-ray diffraction using polycapillary optics for in situ dynamic diffraction.

B R Maddox¹, M C Akin¹, A Teruya¹

¹Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

The Review of Scientific Instruments

|September 3, 2016

Summary

This summary is machine-generated.

Researchers developed a new method for single-pulse X-ray diffraction (XRD) using polycapillary optics. This technique enables high-quality diffraction data collection from a distance, overcoming challenges in pulsed power facilities.

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Area of Science:

Materials Science
Physics
Engineering

Background:

Single-pulse X-ray diffraction (XRD) at pulsed power facilities faces challenges.
High flux and brightness are required for diffraction.
Geometric constraints often place X-ray sources close to samples, exposing them to debris.

Purpose of the Study:

To develop a method for obtaining high-quality XRD data from a distance.
To overcome the limitations of traditional close-proximity X-ray sources in dynamic compression experiments.

Main Methods:

Coupled X-ray polycapillary optics to a single-shot needle-and-washer X-ray diode source.
Utilized a laser-based alignment scheme for precise positioning.
Conducted experiments on a Molybdenum (Mo) sample using 17 keV X-rays.

Main Results:

Achieved high-quality X-ray diffraction using a single 16 ns X-ray pulse.
Successfully collected diffraction data with the X-ray source positioned over 1 meter from the sample.
Identified an anode conditioning effect that enhanced X-ray intensity by 180%.

Conclusions:

The developed system enables remote, high-quality XRD measurements at pulsed power facilities.
Polycapillary optics coupled with a laser-aligned diode source are effective for diagnostic XRD.
Anode conditioning is a significant factor for optimizing X-ray source performance.