Improvements in time resolution and signal-to-noise ratio in a compact pico-second pulse radiolysis system

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• 作者：Hiroyuki Nagai ; Masaaki Kawaguchi ; Kazuyuki Sakaue ; Keita Komiya ; Tomoaki Nomoto ; Yoshio Kamiya ; Yoshimasa Hama ; Masakazu Washio ; Kiminori Ushida ; Shigeru Kashiwagi ; Ryunosuke Kuroda
• 关键词：Pulse radiolysis ; Pico-second time resolution ; Photo-cathode RF-gun ; Pump– ; probe ; Nd ; YLF laser ; Hydrated electron
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2007
• 出版时间：December 2007
• 年：2007
• 卷：265
• 期：1
• 页码：82-86
• 全文大小：690 K

文摘

A compact pico-second pulse radiolysis system has been developing at Waseda University for studying primary processes in radiation chemistry. The system is composed of a photo-injector system and a pico-second all-solid-state laser system. An infrared (IR) and an ultraviolet (UV) laser pulses are obtained from mode-locked Nd:YLF laser system and used for generation of the white light continuum as a probe light and the irradiation to the Cu cathode of a photo-cathode RF-gun, respectively. To improve signal-to-noise (S/N) ratio and time resolution of this pulse radiolysis system, we optimized both probe light and pump electron beam. As a result, our pico-second pulse radiolysis system has been enough to study the primary processes of radiation chemistry. The experimental results and the improvements of our system are described in this paper.