Ultra-high-precision time control system over any long time delay for laser pump and synchrotron x-ray probe experiment.
Ultra-high-precision time control system over any long time delay for laser pump and synchrotron x-ray probe experiment.
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适用于激光泵浦和同步加速器X射线探针实验的任意长延时的超高精度时间控制系统。
DOI：
10.1063/1.2906232
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
M. Takata
中科院分区：
文献类型：
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作者：
Y. Fukuyama;N. Yasuda;Jungeun Kim;H. Murayama;T. Ohshima;Yoshihito Tanaka;S. Kimura;H. Kamioka;Y. Moritomo;K. Toriumi;Hitoshi Tanaka;K. Kato;T. Ishikawa;M. Takata
利用同步辐射(SR)脉冲和同步飞秒激光脉冲，研制了用于皮秒时间分辨X射线衍射测量的长时间延迟超高精度时钟系统。采用同相正交调制器和同步计数器相结合的方法，实现了泵浦激光脉冲与探测SR脉冲之间的时延控制。这种方法允许我们几乎无限地改变延迟时间，同时保持+/-8.40 ps的精度。使用延迟控制系统的时间分辨衍射测量用于精确测量砷化镓单晶中的声速。
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.