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Yamauchi, Toshihiko; Kobayashi, Seiji*; Sugibayashi, Hideyuki*; Tachibana, Toshiyuki*; Naito, Shunya*; Kanno, Yoshinori*; Hiruta, Toshihito
Japanese Journal of Applied Physics, 51(1), p.01AA02_1 - 01AA02_7, 2012/01
Times Cited Count：0 Percentile：0(Physics, Applied)In the beginning of this study, the RF (radio frequency) plasma by the internal antenna which is in contrast to that of the external antenna, was considered for the transition from the charged coupled plasma (CCP) to the inductively coupled plasma (ICP) not to be observed. On the contrary, in our plasma experiment by using the internal multi-turn RF antenna, the transition phenomenon was observed at the extent of 40 W in RF power. In this experiment, the relation between the gas pressure and the RF power on the transition from CCP to ICP indicated almost the same characteristic as Paschen's law. But the transition physics, or the absorption mechanism of RF power based on the collision dumping, was strongly complex. We have experimentally represented the CCP-ICP transition to study the physics using the original physical technique. Firstly, we changed the CCP into the ICP by the gas control. It was considered that the increase of the electron temperature caused the transition. Secondly, the decrease of gas pressure displayed the same meaning with the longer period of the self-pulse transition. Thirdly, the self-bias caused by RF power and the external bias applied between the RF antenna and the stage were described for the transition physics.
Tanuma, Koji; Shimizu, Kazuaki; Hiruta, Toshihito; Kimura, Naoyuki; Suzuki, Mitsutoshi; Ito, Toru
Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Dai-28-Kai Nenji Taikai Rombunshu (CD-ROM), 7 Pages, 2007/00
JAEA is developing practical use of an intruder automated monitoring system aimed at early detection of intruders or suspicious objects entering into a site boundary or protected areas, etc. The system is aimed at rationalization and efficiency of guard functions by using monitoring camera and image analysis software to watch the action of intruder or suspicious individual. This paper introduces the results of comparative investigations, including the performance and function of intrusion detection, expansion of the system, the test results of environmental resistance over a long period of time (ex. climate conditions, small animals, weeds, behavior of intruders, etc.). The effectiveness of the monitoring system as a physical protection measure, and the scope of application other than nuclear facility are evaluated using typical foreign image analysis software.
Hiruta, Toshihito; Kimura, Naoyuki; Tanuma, Koji; Shimizu, Kazuaki; Suzuki, Mitsutoshi; Ito, Toru
no journal, ,
no abstracts in English
Tanuma, Koji; Hiruta, Toshihito; Kimura, Naoyuki; Shimizu, Kazuaki; Suzuki, Mitsutoshi; Ito, Toru
no journal, ,
JAEA is developing practical use of an intruder automated monitoring system aimed at early detection of intruders or suspicious objects entering into a site boundary or protected areas, etc. The system is aimed at rationalization and efficiency of guard functions by using monitoring camera and image analysis software to watch the action of intruder or suspicious individual. This paper introduces the results of comparative investigations, including the performance and function of intrusion detection, expansion of the system, the test results of environmental resistance over a long period of time (ex. climate conditions, small animals, weeds, behavior of intruders, etc.). The effectiveness of the monitoring system as a physical protection measure, and the scope of application other than nuclear facility are evaluated using typical foreign image analysis software.
Hiruta, Toshihito; Kimura, Naoyuki; Tanuma, Koji; Shimizu, Kazuaki
no journal, ,
no abstracts in English
Yamauchi, Toshihiko; Hamajima, Takafumi*; Kobayashi, Seiji*; Kanno, Yoshinori*; Hiruta, Toshihito
no journal, ,
