用于激光泵浦和同步加速器X射线探测实验的超长延迟超高精度时间控制系统。

Ultra-high-precision time control system over any long time delay for laser pump and synchrotron x-ray probe experiment.

作者信息

Fukuyama Yoshimitsu, Yasuda Nobuhiro, Kim Jungeun, Murayama Haruno, Ohshima Takashi, Tanaka Yoshihito, Kimura Shigeru, Kamioka Hayato, Moritomo Yutaka, Toriumi Koshiro, Tanaka Hitoshi, Kato Kenichi, Ishikawa Tetsuya, Takata Masaki

机构信息

Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan.

出版信息

Rev Sci Instrum. 2008 Apr;79(4):045107. doi: 10.1063/1.2906232.

DOI:10.1063/1.2906232

PMID:18447552

Abstract

An ultra-high-precision clock system for long time delay has been developed for picosecond time-resolved x-ray diffraction measurements using synchrotron radiation (SR) pulses and synchronized femtosecond laser pulses. The time delay control between pump laser pulse and the probe SR pulse was achieved by combining an in-phase quadrature modulator and a synchronous counter. This method allowed us to change the delay time by a nearly infinite amount while maintaining the precision of +/-8.40 ps. Time-resolved diffraction measurements using the delay control system were demonstrated for precise measurement of an acoustic velocity in a single crystal of gallium arsenide.

摘要

我们开发了一种用于长时间延迟的超高精度时钟系统，用于使用同步辐射（SR）脉冲和同步飞秒激光脉冲的皮秒时间分辨X射线衍射测量。通过将同相正交调制器和同步计数器相结合，实现了泵浦激光脉冲和探测SR脉冲之间的时间延迟控制。这种方法使我们能够在保持±8.40 ps精度的同时，将延迟时间改变几乎无限的量。使用该延迟控制系统进行了时间分辨衍射测量，以精确测量砷化镓单晶中的声速。