用于软X射线磁圆二色性实验的超低温装置。

Ultralow-temperature device dedicated to soft X-ray magnetic circular dichroism experiments.

作者信息

Kappler J P, Otero E, Li W, Joly L, Schmerber G, Muller B, Scheurer F, Leduc F, Gobaut B, Poggini L, Serrano G, Choueikani F, Lhotel E, Cornia A, Sessoli R, Mannini M, Arrio M A, Sainctavit Ph, Ohresser P

机构信息

Synchrotron SOLEIL, L'Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France.

Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France.

出版信息

J Synchrotron Radiat. 2018 Nov 1;25(Pt 6):1727-1735. doi: 10.1107/S1600577518012717. Epub 2018 Oct 19.

DOI:10.1107/S1600577518012717

PMID:30407183

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6225739/

Abstract

A new ultralow-temperature setup dedicated to soft X-ray absorption spectroscopy and X-ray magnetic circular dichroism (XMCD) experiments is described. Two experiments, performed on the DEIMOS beamline (SOLEIL synchrotron), demonstrate the outstanding performance of this new platform in terms of the lowest achievable temperature under X-ray irradiation (T = 220 mK), the precision in controlling the temperature during measurements as well as the speed of the cooling-down and warming-up procedures. Moreover, owing to the new design of the setup, the eddy-current power is strongly reduced, allowing fast scanning of the magnetic field in XMCD experiments; these performances lead to a powerful device for X-ray spectroscopies on synchrotron-radiation beamlines facilities.

摘要

本文描述了一种专门用于软X射线吸收光谱和X射线磁圆二色性（XMCD）实验的新型超低温装置。在DEIMOS光束线（索莱伊同步加速器）上进行的两项实验表明，这个新平台在X射线辐照下可达到的最低温度（T = 220 mK）、测量过程中控制温度的精度以及冷却和升温程序的速度方面表现出色。此外，由于装置的新设计，涡流功率大幅降低，使得在XMCD实验中能够快速扫描磁场；这些性能使该装置成为同步辐射光束线设施上用于X射线光谱学的强大设备。