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X-ray Crystallography

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Related Experiment Video

Updated: Dec 22, 2025

$Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples$

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

SPIND-TC: an indexing method for two-color X-ray diffraction data.

Xuanxuan Li¹, Chufeng Li², Haiguang Liu³

¹Department of Engineering Physics, Tsinghua University, Beijing 100084, China.

Acta Crystallographica. Section A, Foundations and Advances

|May 2, 2020

Summary

This summary is machine-generated.

A new algorithm, SPIND-TC, accurately indexes two-color X-ray diffraction data from free-electron lasers. This advances X-ray crystallography by enabling analysis of complex experimental setups.

Keywords:

indexing algorithm serial crystallography two-color diffraction

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Area of Science:

Crystallography
X-ray Science
Biophysics

Background:

Two-color X-ray free-electron laser (XFEL) operation enables advanced experiments like X-ray pump/X-ray probe and multiple-wavelength anomalous dispersion phasing.
Existing X-ray diffraction data indexing methods are primarily designed for monochromatic beams, limiting their application in two-color XFEL experiments.

Purpose of the Study:

To develop and present a novel algorithm for indexing diffraction data generated by two-color X-ray beams.
To extend the capabilities of the sparse-pattern indexing algorithm (SPIND) for handling two-color diffraction data.

Main Methods:

The study introduces SPIND-TC, an extension of the SPIND algorithm, specifically designed for indexing two-color diffraction patterns.
The algorithm's principle and implementation are detailed.
Performance was evaluated using both simulated and experimental diffraction data from protein crystals.

Main Results:

SPIND-TC successfully and accurately indexed two-color diffraction data in all tested scenarios.
The algorithm demonstrated effectiveness on both simulated datasets and real experimental data.

Conclusions:

SPIND-TC provides a robust solution for indexing two-color X-ray diffraction data, overcoming limitations of existing monochromatic methods.
This new algorithm expands research possibilities at XFEL facilities utilizing two-color operation modes.