Single shot x-ray diffractometry in SACLA with pulsed magnetic fields up to 16 T

Akihiko Ikeda,Takeshi Yajima,Xuguang Zhou,Makina Yabashi,Yasuhiro H Matsuda,Yuya Kubota,Kensuke Tono

doi:10.1103/physrevresearch.2.043175

Abstract

Single shot x-ray diffraction (XRD) experiments have been performed with a x-ray free electron laser (XFEL) under pulsed high magnetic fields up to 16 T generated with a nondestructive minicoil. The antiferromagnetic insulator phase in a perovskite manganaite, Pr$_{0.6}$Ca$_{0.4}$MnO$_{3}$, is collapsed at a magnetic field of $\approx 8$ T with an emergence of the ferromagnetic metallic phase, which is observed via the accompanying lattice changes in a series of the single shot XRD. The feasibility of the single shot XRD experiment under ultrahigh magnetic fields beyond 100 T is discussed, which is generated with a portable destructive pulse magnet.

Highlights

As a novel light source, an x-ray free electron laser (XFEL) is prominently characterized by the ultrahigh transverse coherence, ultrashort pulses between hundreds to a few femtoseconds and a high-photon flux of 1011−12 photons/pulse that realizes single shot experiments [1,2]
For x-ray experiments at well above 50 T, we propose the use of a single turn coil (STC), a destructive pulse magnet, instead of nondestructive pulse magnets, because a STC can be portable and generates magnetic fields over 100 T [20,21]
In preceding studies for the singe shot x-ray diffractometry (XRD) at 100 T in SPring-8 Angstrom Compact free electron LAser (SACLA), we have discovered that the lattices of materials are changing under 100 T fields of a few microseconds pulse generated in destructive pulse magnets [26]

Summary

INTRODUCTION

As a novel light source, an x-ray free electron laser (XFEL) is prominently characterized by the ultrahigh transverse coherence, ultrashort pulses between hundreds to a few femtoseconds and a high-photon flux of 1011−12 photons/pulse that realizes single shot experiments [1,2]. The temporal duration of the generated field by a single turn coil is only a few microseconds, which is about three orders of magnitude smaller than the pulse of a nondestructive magnet. It is still long enough for the single shot experiment with an XFEL pulse. In ISSP, a specially prepared nonmetallic cryostat and vacuum system has been implemented for destructive pulse experiments at low temperatures This equipment is proof against the explosions of the STC magnet. We comment on a design for a portable single turn coil system for SACLA

EXPERIMENT

AND DISCUSSION

SUMMARY