DARWIN: Dose monitoring system applicable to various radiations with wide energy ranges

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

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 satisfies the following features: (1) capable of monitoring doses from neutrons, photons and muons with wide energy ranges - from thermal energy to 1 GeV, 150 keV to 100 MeV, and 1 MeV to 100 GeV, respectively, (2) high sensitivity and precision - more than 10 times as sensitive as conventional moderator-based survey instruments for neutrons, (3) easy to operate with a simple user-interface, and (4) light weighted for movability. The details of the features will be described at the presentation, together with the results of the calibrations performed in several accelerator facilities.