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Journal Articles

Application of diamond window for infrared laser diagnostics in a tokamak device

Kawano, Yasunori; Chiba, Shinichi; Inoue, Akira*

Review of Scientific Instruments, 75(1), p.279 - 280, 2004/01

https://doi.org/10.1063/1.1633990
 Times Cited Count：11 Percentile：53.04(Instruments & Instrumentation)

It has been successful to apply CVD diamond plate as the vacuum window for infrared CO$$_{2}$$ laser interferometry and polarimetry for electron density measurement in the JT-60U tokamak. In comparison with to use the conventional zinc-selenide windows, the Faraday rotation component at diamond windows was small as negligible. This resulted in the improvement of the Faraday rotation measurement for a tokamak plasma by polarimetry.

Journal Articles

Collective Thomson scattering based on CO$$_{2}$$ laser for ion energy spectrum measurements in JT-60U

Kondoh, Takashi; Miura, Yukitoshi; Lee, S.*; Richards, R. K.*; Hutchinson, D. P.*; Bennett, C. A.*

Review of Scientific Instruments, 74(3), p.1642 - 1645, 2003/03

https://doi.org/10.1063/1.1532760
 Times Cited Count：18 Percentile：67.28(Instruments & Instrumentation)

Measurements of energy spectrum and density profile of confined alpha-particles are required for ITER. Several methods have been proposed, however, a measurement technique hasn't been established yet. A collective Thomson scattering (CTS) system based on a pulsed CO$$_{2}$$ laser is being developed to demonstrate feasibility of alpha-particle diagnostics for ITER. The pulse laser (15J, 1$$mu$$m, 0.6 $$mu$$m) and a wide band (~ 8GHz) heterodyne receiver with a quantum-well infrared photodetector (QWIP) have been developed and installed in the JT-60U tokamak. Stray light is reduced by a notch filter with hot CO$$_{2}$$ gas. Heterodyne receiver is absolutely calibrated using large area blackbody radiation source. Scattered signal from JT-60U plasma has not detected because of electrical noise originated from discharge of the pulsed laser and stray signal caused by impurity of the spectrum of the pulsed laser.

Journal Articles

High enrichment of $$^{28}$$Si by infrared multiple photon decomposition of Si$$_{2}$$F$$_{6}$$

Yokoyama, Atsushi; Oba, Hironori; Shibata, Takemasa; Kawanishi, Shunichi*; Sugimoto, Shunichi*; Ishii, Takeshi*; Oya, Akio*; Miyamoto, Yoshiki*; Isomura, Shohei*; Arai, Shigeyoshi*

Journal of Nuclear Science and Technology, 39(4), p.457 - 462, 2002/04

https://doi.org/10.3327/jnst.39.457
 Times Cited Count：2 Percentile：17.59(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Development of sensitive analytical technique by laser-induced photoacoustic spectroscopy

Kihara, Takehiro; *; Fujine, Sachio; Maeda, Mitsuru; *; *

JAERI-M 93-234, 47 Pages, 1993/12

JAERI-M-93-234.pdf:1.7MB

no abstracts in English

Journal Articles

Feasibility study of laser spectrometry for measuring uranium enrichment in gaseous UF$$_{6}$$

Oda, Tetsuzo; ; *

Proc. of the 4th Int. Conf. on Facility Operations-Safeguards Interface, p.303 - 306, 1992/00

no abstracts in English

Journal Articles

Feasibility study of laser spectrometry for measuring uranium enrichment in gaseous UF$$_{6}$$

Oda, Tetsuzo; *;

Transactions of the American Nuclear Society, 61(SUPPL.1), p.44 - 45, 1991/10

no abstracts in English

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