Development of a coherent THz radiation source based on the ultra-short electron beam and its applications
Development of a coherent THz radiation source based on the ultra-short electron beam and its applications
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DOI：
10.1016/j.nima.2010.02.015
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发表时间：
2011-05
影响因子：
1.4
通讯作者：
R. Kuroda;M. Yasumoto;H. Toyokawa;N. Sei;M. Koike;K. Yamada
中科院分区：
文献类型：
--
作者：
R. Kuroda;M. Yasumoto;H. Toyokawa;N. Sei;M. Koike;K. Yamada
在国家先进工业科学技术研究所（AIST），一种相干太赫兹（THz）辐射源已经开发基于超短电子束，使用s波段紧凑型电子直线加速器。所设计的太赫兹脉冲在0.1-2THz频率范围内峰值功率大于1kW。整个系统位于一间约10平方米的研究室内。直线加速器由一个激光光电阴极射频枪（BNL型）和一个Cs2Te光电阴极负载锁定系统和两个1.5米长的s波段加速器管组成。电子束可以加速到大约42MeV。用磁束压缩器将电子束压缩到小于1ps （rms）。太赫兹区相干同步辐射（CSR）由90°弯曲磁体的超短电子束产生，并从z切割石英窗口中提取，用于太赫兹应用。在这项工作中，成功地证明了太赫兹扫描透射成像在一段时间内测量蔬菜叶片的新鲜度。
At the National Institute of Advanced Industrial Science and Technology (AIST), a coherent terahertz (THz) radiation source has been developed based on an ultra-short electron beam using an S-band compact electron linac. The designed THz pulse has a high peak power of more than 1kW in the frequency range 0.1–2THz. The entire system is located in one research room of about 10m square. The linac consists of a laser photocathode rf gun (BNL type) with a Cs2Te photocathode load-lock system and two 1.5-m-long S-band accelerator tubes. The electron beam can be accelerated up to approximately 42MeV. The electron bunch was compressed to less than 1ps (rms) with a magnetic bunch compressor. The coherent synchrotron radiation (CSR) of the THz region was generated from the ultra-short electron bunch at the 90° bending magnet, and it was extracted from a z-cut quartz window for THz applications. In this work, the THz scanning transmission imaging was successfully demonstrated for measuring the freshness of a vegetable leaf over a period of time.