用于高压和高温下液体及低原子序数材料结构研究的高效多通道准直器。

High efficiency multichannel collimator for structural studies of liquids and low-Z materials at high pressures and temperatures.

作者信息

Morard G, Mezouar M, Bauchau S, Álvarez-Murga M, Hodeau J-L, Garbarino G

机构信息

Institut de Minéralogie et de Physique des Milieux Condensés, UMR CNRS 7590, Université Pierre et Marie Curie, Université Paris Diderot, Paris, France.

出版信息

Rev Sci Instrum. 2011 Feb;82(2):023904. doi: 10.1063/1.3551988.

DOI:10.1063/1.3551988

PMID:21361608

Abstract

A high efficiency multichannel collimator (MCC) device has been developed at the high pressure beamline ID27 of the European Synchrotron Radiation Facility to drastically reduce the x-ray background from the sample environment in the Paris-Edinburgh press. The main technical difficulty, which resides in the minimum slits size achievable using the classical mono-bloc design, has been resolved using an original concept based on a set of independent slits. Then, a very small slit size of 50 μm was manufactured resulting in a great improvement of the signal to background ratio. In addition, the transfer function of the MCC has been measured using the x-ray diffusion signal of a metal doped glass and efficiently applied to correct the raw data. The potential of this new device is illustrated in two challenging examples: iron-sulfur liquid structures and C(60) polymerization process at high pressure and high temperature.

摘要

欧洲同步辐射装置高压光束线ID27已开发出一种高效多通道准直器（MCC）设备，以大幅降低巴黎-爱丁堡压机中样品环境产生的X射线背景。主要技术难题在于采用传统整体式设计所能达到的最小狭缝尺寸，现已通过基于一组独立狭缝的原创概念得以解决。随后，制造出了50μm的极小狭缝尺寸，从而使信背比得到了极大改善。此外，已利用金属掺杂玻璃的X射线散射信号测量了MCC的传递函数，并有效地将其应用于校正原始数据。在两个具有挑战性的实例中展示了这种新设备的潜力：高压高温下的铁硫液体结构和C(60)聚合过程。