Ikeda Akihiko, Matsuda Yasuhiro H, Tsuda Hiroshi
Institute for Solid State Physics, University of Tokyo, Kashiwa, Japan.
National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
Rev Sci Instrum. 2018 Sep;89(9):096103. doi: 10.1063/1.5034035.
High-resolution magnetostriction measurement of Δ/ ∼ 10 at a speed of 5 MHz is performed using the optical filter method as the detection scheme for the fiber Bragg grating (FBG) based strain monitor under 35-ms pulsed high magnetic fields up to 45 T at 2.2 K. The resolution of magnetostriction is about the same order as the conventionally reported value from FBG based magnetostriction measurement systems for millisecond pulsed magnetic fields. The measurement speed is ∼100 times the conventional ones. The present system can be a faster alternative for the conventional FBG based magnetostriction measurement system for millisecond pulsed high magnetic fields.
在2.2K温度下，利用光学滤波法作为基于光纤布拉格光栅（FBG）的应变监测器的检测方案，在高达45T的35ms脉冲强磁场下，以5MHz的速度对Δ/∼10进行了高分辨率磁致伸缩测量。磁致伸缩的分辨率与传统报道的基于FBG的毫秒脉冲磁场磁致伸缩测量系统的值大致相同。测量速度约为传统测量速度的100倍。本系统可以成为传统的基于FBG的毫秒脉冲强磁场磁致伸缩测量系统的更快替代方案。
