Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
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Development of Terahertz Pulse Wave Diagnostics for a Magnetized Fusion Plasma Reactor
Tokihiko TOKUZAWAYutaka KADOYAMasahiko TANIKohji YAMAMOTOMasanori HANGYOHideaki KITAHARAKenji TANAKAIchihiro YAMADAKazuo KAWAHATA
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2013 Volume 8 Pages 2402063

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Abstract

Terahertz wave diagnostics have been developed for current and future high-temperature and high-density fusion plasma measurements. Since the combined system of a reflectometer and a delayometer requires a wide-band frequency source for the density profile measurements, a terahertz pulse is a possible candidate. A test system using terahertz time-domain spectroscopy has been constructed to develop the diagnostics. The system utilizes a femtosecond fiber laser as a pumping source and a bow-tie-type photoconductive antenna as a THz wave emitter. An output THz pulse with a frequency of up to 2 THz has been obtained. Some investigations involving measurement of the refractive index of a test material are performed, and the transmission dispersion effects of an optical fiber are determined.

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© 2013 by The Japan Society of Plasma Science and Nuclear Fusion Research
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