title: Performance test of personal RF monitor for area monitoring at magnetic confinement fusion facility.
abstract: For safety management at a magnetic confinement fusion-test facility, protection from not only ionising radiation, but also non-ionising radiation such as the leakage of static magnetic and electromagnetic fields is an important issue. Accordingly, the use of a commercially available personal RF monitor for multipoint area monitoring is proposed. In this study, the performance of both fast- and slow-type personal RF monitors was investigated by using a transverse electromagnetic cell system. The range of target frequencies was between 10 and 300 MHz, corresponding to the ion cyclotron range of frequency in a fusion device. The personal RF monitor was found to have good linearity, frequency dependence and isotropic response. However, the time constant for the electric field sensor of the slow-type monitor was much longer than that for the fast-type monitor. Considering the time-varying field at the facility, it is found that the fast-type monitor is suitable for multipoint monitoring at magnetic confinement fusion test facilities.
authors: Department of Helical Plasma Research, National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-city, Gifu 509-5292, Japan. tanaka.masahiro@nifs.ac.jp
authors: Masahiro
authors: M
authors: Tanaka
authors: Tatsuhiko
authors: T
authors: Uda
authors: Jianqing
authors: J
authors: Wang
authors: Osamu
authors: O
authors: Fujiwara
mesh_terms: D004574:Electromagnetic Fields / Q000009:adverse effects*; D006801:Humans; D016273:Occupational Exposure / Q000032:analysis*; D011834:Radiation Monitoring / Q000295:instrumentation*