広帯域エネルギー対応マルチ放射線モニタDARWINの開発

DARWIN; Dose monitoring system Applicable to various Radiations WIth wide energy raNges

佐藤 達彦   ; 佐藤 大樹   ; 遠藤 章   ; 山口 恭弘

Sato, Tatsuhiko; Satoh, Daiki; Endo, Akira; Yamaguchi, Yasuhiro

高エネルギー加速器施設の放射線管理に用いるために、中性子,光子及びミューオンによる線量を同時に高感度で測定可能なモニタDARWINを開発した。DARWINは、従来のモニタと比べて、測定対象粒子の種類及びエネルギー範囲,精度,感度,操作性などの面で格段に優れた特性を持つ。

A new inventive radiation dose monitor, designated as DARWIN (Dose monitoring system Applicable to various Radiations with WIde energy raNges), has been developed for real-time monitoring of doses in workspaces and surrounding environments of high energy accelerator facilities. DARWIN is composed of a phoswitch-type scintillation detector, which consists of liquid organic scintillator BC501A coupled with ZnS(Ag) scintillation sheets doped with 6Li, and a data acquisition system based on a Digital-Storage-Oscilloscope. The details of its features will be described at the presentation, together with the results of its calibrations performed in several accelerator facilities.