Morard G, Mezouar M, Bauchau S, Álvarez-Murga M, Hodeau J-L, Garbarino G
Institut de Minéralogie et de Physique des Milieux Condensés, UMR CNRS 7590, Université Pierre et Marie Curie, Université Paris Diderot, Paris, France.
Rev Sci Instrum. 2011 Feb;82(2):023904. doi: 10.1063/1.3551988.
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.
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。
