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Journal Articles

Development of microwave-assisted, laser-induced breakdown spectroscopy without a microwave cavity or waveguide

Oba, Masaki; Miyabe, Masabumi; Akaoka, Katsuaki; Wakaida, Ikuo

Japanese Journal of Applied Physics, 59(6), p.062001_1 - 062001_6, 2020/06

 Times Cited Count:2 Percentile:12.34(Physics, Applied)

Using a semiconductor microwave source and a coaxial cable for microwave transmission, a compact microwave-assisted, laser-induced breakdown spectroscopy system without a microwave cavity or waveguide was developed. Several types of electrode heads were tested, so that the emission intensity was 50 times larger than without microwave. The limit of the enhancement effect was also found.

Journal Articles

Development of embedded Mach-Zehnder optical waveguide structures in polydimethylsiloxane thin films by proton beam writing

Kada, Wataru*; Miura, Kenta*; Kato, Hijiri*; Saruya, Ryota*; Kubota, Atsushi*; Sato, Takahiro; Koka, Masashi; Ishii, Yasuyuki; Kamiya, Tomihiro; Nishikawa, Hiroyuki*; et al.

Nuclear Instruments and Methods in Physics Research B, 348, p.218 - 222, 2015/04

 Times Cited Count:6 Percentile:51.48(Instruments & Instrumentation)

Journal Articles

Development of a 972MHz circurator for the J-PARC linac, 1

Suganuma, Kazuaki; Anami, Shozo*; Chishiro, Etsuji; Kubota, Chikashi*; Shinohara, Kibatsu*; Tsuruoka, Shigetsugu*; Yamaguchi, Seiya*

Proceedings of 1st Annual Meeting of Particle Accelerator Society of Japan and 29th Linear Accelerator Meeting in Japan, p.275 - 277, 2004/08

A 972MHz circlator is currently developed. In the high-power test of the prototype,rf breakdown was observed at the matching post. Rf characterristics obtained by simulations and low-power tests will be presented.

Journal Articles

Design and adjustment of 324 MHz waveguide system of the J-PARC LINAC

Suganuma, Kazuaki; Anami, Shozo*; Kubota, Chikashi*; Chishiro, Etsuji; Yamaguchi, Seiya*

Proceedings of 28th Linear Accelerator Meeting in Japan, p.78 - 80, 2003/08

This report a design and adjustment of 324MHz Waveguide System of The J-PARC LINAC.

Journal Articles

High power experiments of remote steering launcher for electron cyclotron heating and current drive

Takahashi, Koji; Moeller, C. P.*; Sakamoto, Keishi; Hayashi, Kenichi*; Imai, Tsuyoshi

Fusion Engineering and Design, 65(4), p.589 - 598, 2003/07

 Times Cited Count:21 Percentile:79.65(Nuclear Science & Technology)

High power radiation experiments of a remote steering launcher for an EC H&CD system were carried out to study the characteristic of the rf beam steering and transmission. The remote steering launcher consists of a 4.632m corrugated square waveguide (45.7 $$times$$ 45.7mm$$^{2}$$) and a movable flat mirror which is placed at the input of the waveguide. Measurements were made in the range 0-10$$^{circ}$$ at a frequency of 170GHz. The measured radiation pattern is clearly a Gaussian-like distribution, which is in agreement with the low power measurements. A steering capability of up to 10$$^{circ}$$ was experimentally confirmed. Transmission and radiation of 0.5 MW-3.0 sec and 0.2 MW-10.0 sec pulses were successfully demonstrated over a steering angle range of 0-10$$^{circ}$$. No arcing was observed during the experiments and no damage to the waveguide was found after the experiments were finished. We confirmed that remote steering was a possibly alternative scheme of rf beam steering for EC H&CD.

Journal Articles

Transmission experiments of a 170GHz remote steering EC launcher

Takahashi, Koji; Moeller, C. P.*; Kasugai, Atsushi; Minami, Ryutaro; Sakamoto, Keishi; Imai, Tsuyoshi

Proceedings of 28th International Conference on Infrared and Millimeter Waves, p.385 - 386, 2003/00

no abstracts in English

Journal Articles

Development of all-metal antenna for ICRF system in next generation tokamaks

Moriyama, Shinichi; Fujii, Tsuneyuki; Kimura, Haruyuki; Arai, Hiroyuki*; Ota, K.*

Proceedings of the 18th IEEE/NPSS Symposium on Fusion Engineering (SOFE '99), p.399 - 402, 1999/00

no abstracts in English

Journal Articles

A corrugated waveguide driven by the linac as a prebuncher and seed-power generator of mm-wave FEL

X.D.Zheng*; ; Maebara, Sunao; *; ; *; Yakayama, Ken*; *; *; Ogawa, Masao*; et al.

Nuclear Instruments and Methods in Physics Research A, 407(1-3), p.198 - 202, 1998/00

 Times Cited Count:1 Percentile:22.38(Instruments & Instrumentation)

no abstracts in English

JAEA Reports

Performance test of lower hybrid waveguide under long/high-RF power transmission

Seki, Masami; Obara, Kenjiro; Maebara, Sunao; Ikeda, Yoshitaka; Imai, Tsuyoshi; Nagashima, Takashi; Goniche, M.*; J.Brossaud*; C.Barral*; G.Berger-By*; et al.

JAERI-Research 96-025, 55 Pages, 1996/06

JAERI-Research-96-025.pdf:2.06MB

no abstracts in English

Journal Articles

Twenty-channel grating polychromator diagnostic system for electron cyclotron emission measurement in JT-60

Ishida, Shinichi; Nagashima, Akira; Sato, Masayasu; Isei, Nobuaki; Matoba, Toru

Review of Scientific Instruments, 61(10), p.2834 - 2836, 1990/10

 Times Cited Count:21 Percentile:86.14(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Measurement of secondary electron emission coefficient of wall materials using auger electron spectromter

Hiroki, S.; ; ; Murakami, Yoshio

Shinku, 30(1), p.14 - 21, 1987/01

no abstracts in English

JAEA Reports

Measurement of Secondary Electron Emission Coefficient of Wall Materials Using Auger Electron Spectroscopy

Hiroki, S.; ; *; ; Murakami, Yoshio

JAERI-M 85-123, 23 Pages, 1985/08

JAERI-M-85-123.pdf:0.71MB

no abstracts in English

Journal Articles

Excitation of ICRF waves in tokamaks by waveguide launcher

; *; *

Fusion Technology, 7, p.301 - 310, 1985/00

no abstracts in English

Oral presentation

Development of Mach-Zehnder optical waveguide embedded in PDMS thin films by proton beam writing

Kada, Wataru*; Miura, Kenta*; Saruya, Ryota*; Kato, Hijiri*; Kubota, Atsushi*; Sato, Takahiro; Koka, Masashi; Ishii, Yasuyuki; Kamiya, Tomihiro; Nishikawa, Hiroyuki*; et al.

no journal, , 

Oral presentation

Fabrication of Mach-Zehnder optical waveguide structures in PDMS thin films using proton beam writing

Kano, Keisuke*; Saruya, Ryota*; Kawabata, Shunsuke*; Araki, Jun*; Noguchi, Katsuya*; Kada, Wataru*; Miura, Kenta*; Kato, Hijiri*; Sato, Takahiro; Koka, Masashi; et al.

no journal, , 

Oral presentation

Progress in development of a wide band polarizer for ECCD system in JT-60SA

Horie, Naoyuki*; Sai, Takuma*; Omori, Kohei*; Saigusa, Mikio*; Kobayashi, Takayuki; Moriyama, Shinichi; Arata, Hiroshi*; Uno, Tsuyoshi*

no journal, , 

no abstracts in English

16 (Records 1-16 displayed on this page)
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