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Journal Articles

THz beam transmission demonstration experiment using metallic cladding polymer fibers

Ishiyama, Shintaro; Masamune, Ken*; Idehara, Toshitaka*

Nihon Kikai Gakkai Rombunshu (Internet), 82(833), p.15-00449_1 - 15-00449_14, 2016/01

Transmission demonstration experiment of 0.1-0.2 THz beam was performed with transmission system consisted of polymer fibers of 3 mm $$times$$ 300 mmL coated with gold metal. THz beam was generated by high power compact gyrotron designed output power of 0.25 kW and measured output power at terminal of metallic cladding polymer fibers in the transmission system and the following results were derived. (1) It was demonstrated that maximum output power of the order of 0.84 W through the polymer fibers was observed by SBD detector at input power of the order of 7.5 W.

Journal Articles

A Dual-beam irradiation facility for a novel hybrid cancer therapy

Sabchevski, P.*; Idehara, Toshitaka*; Ishiyama, Shintaro; Miyoshi, Norio*; Tatsukawa, Toshiaki*

Journal of Infrared, Millimeter, and Terahertz Waves, 34(1), p.71 - 87, 2013/01

 Times Cited Count:12 Percentile:59.45(Engineering, Electrical & Electronic)

In this paper we present the main ideas and discuss both the feasibility and the conceptual design of a novel hybrid technique and equipment for an experimental cancer therapy based on the simultaneous and/or sequential application of two beams, namely a beam of neutrons and a CW (continuous wave) or intermittent sub-terahertz wave beam produced by a gyrotron for treatment of cancerous tumors. The main simulation tools for the development of the computer aided design (CAD) of the prospective experimental facility for clinical trials and study of such new medical technology are briefly reviewed. Some tasks for a further continuation of this feasibility analysis are formulated as well.

Journal Articles

Innovation of hyper thermo therapy by laser and terahertz beam technology against cancer

Ishiyama, Shintaro; Miyoshi, Norio*; Idehara, Toshitaka*; Bibin, A.*; Kume, Kyo*; Matsumura, Akira*; Shtil, A. A.*

Hikari Araiansu, 23(12), p.19 - 23, 2012/12

To create new complete therapy for integrating various quantum beams, highly coalesed quantum beam science and technology are developing including neutron, X-ray, electron, synchrotron radiation and laser beams against cancer. This paper emphasizes the effectiveness of highly coalesced quantum beam science and technology in cancer, quoting case reports from promise in tests involving tumor model.

Journal Articles

High power millimeter and submillimeter wave material processing

Mitsudo, Seitaro*; Hoshizuki, Hisanori*; Matsuura, Kazunari*; Saji, T.*; Idehara, Toshitaka*; Glyavin, M.*; Eremeev, A.*; Zapevalov, V.*; Kitano, Akihiro; Nishi, Hiroshi; et al.

Proceedings of 29th International Conference on Infrared and Millimeter Waves (IRMMW 2004)/12th International Conference on Terahertz Electronics (THz 2004), p.727 - 728 , 2004/09

Boron carbide (B$$_{4}$$C) is one of advanced materials and is being used in a wide rage of applications. The unique feature of this material is its large neutron-absorbing cross-section. Some of its most prominent applications are controlling rods in nuclear reactors and radiation protection. 24 GHz microwave processing for B$$_{4}$$C ceramics were performed under flowing argon gas using the sintering system. The sintered samples were characterized by the density, the shrinkage and SEM micrographs of fracture surface. Above the temperature of 2000$$^{circ}$$C, the shrinkage and the grain grows were observed.

JAEA Reports

Improvements of the Control Rod Material for Long Lifetime by the High Power Millimeter-wave Ceramics Sintering Method

Idehara, Toshitaka*; Mitsudo, Seitaro*; Hoshizuki, Hisanori*; Ogawa, Isamu*; Shibahara, Itaru; Nishi, Hiroshi; Kitano, Akihiro; Ishibashi, Junichi

JNC TY4400 2003-005, 106 Pages, 2003/03


Boron Carbide B4C pellet is an important part of control rod used to control the reactivity of nuclear reactors. B4C pellet put in a nuclear reactor suffers heavy radiation damage and deformation, which result in a partial destruction and shorten the lifetime of B4C. It is important to improve the characteristics of the B4C pellets for extension of its lifetime. As the results, if the control rod without the shroud will be available, we can realize much simpler structure. In order to improve, the B4C pellet, which was sintered by the hot-press methods, we have re-sintered it by high power millimeter wave ceramics nano-indentation test. The increase of the plasticity is observed. The same improvement of plasticity was observed in alumina pellets that were sintered by millimeter wave sintering methods. Such results imply that the further improvement is expected, if the B4C pellet is sintered from powder specimen by the high power millimeter-wave sintering method. To simulate a partial destruction of B4C pellet under the thermal stress, preliminary internal heating experiments of B4C pellet are performed by using high power millimeter-wave. At the difference between internal and surface temperatures of 1000C, the partial destructions and small cracks are observed in B4C pellet. Thes may be a kind of model experiment for destruction of B4C pellet irradiated by neutrons.

Journal Articles

B$$_{4}$$C ceramics sintering using 24 GHz gyrotron radiation

Hoshizuki, Hisanori*; Kuroda, Tsutomu*; Mitsudo, Seitaro*; Idehara, Toshitaka*; Glyavin, M.*; Kitano, Akihiro; Ishibashi, Junichi; Nishi, Hiroshi; Shibahara, Itaru

En Sekigai Ryoiki Kaihatsu Kenkyu, 4, p.179 - 185, 2003/00


Oral presentation

Design of gyrotron scattering diagnostics for density fluctuation measurement in JT-60

Ogawa, Isamu*; Idehara, Toshitaka*; Myodo, Masahiko*; Kamada, Masaki*; Hatae, Takaki; Shinohara, Koji; Oyama, Naoyuki; Hamamatsu, Kiyotaka

no journal, , 

no abstracts in English

Oral presentation

Transmission technique of high powered THz micro beam for minimally invasive cancer therapy with micro quartz fiber

Ishiyama, Shintaro; Idehara, Toshitaka*; Noda, Kazufusa*

no journal, , 

Transmission experiment of high powered THz micro beam for minimally invasive cancer therapy with micro quartz fiber was conducted with 100 W gyrotron equipment. Transmission components was consisted of two types of micro quartz fiber (0.6 mm$$ phi$$ $$times$$ 150 mm) and hollow waveguide horm with Au metal coating. From these results, it is concluded that 20 $$sim$$ 90 $$mu$$W output was detected from the end of antenna type micro fiver at 80 $$sim$$ 100 W input, whereas not detected in case of columnar type macro fiber.

Oral presentation

Highly coalesced quantum beam science and technology hyper-thermo therapy by terahertz beam technology against cancer

Ishiyama, Shintaro; Idehara, Toshitaka*; Miyoshi, Norio*

no journal, , 

To more fully ascertain the functions and structures of target materials will require the coalescing and integration of a wider spectrum of complementary information only obtained by good combination of various quantum beams, and Frontier Research and Development Committee on Highly Coalesced Quantum Beam Science and Technology was set up in Japan Society for the Promotion of Science (JSPS) to create a new Highly coalesced quantum beam research domain, developing new complete therapy for integrating various quantum beams, including neutron, X-ray, electron, synchrotron radiation and laser beams against cancer. This paper emphasizes the effectiveness of highly coalesced quantum beam science and technology in cancer, quoting case reports from promise in tests involving tumor model.

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