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Suppression of spurious mode oscillation in mega-watt 77-GHz gyrotron as a high quality probe beam source for the collective Thomson scattering in LHD.

Abstract:

Collective Thomson scattering (CTS) diagnostic requires a strong probing beam to diagnose a bulk and fast ion distribution function in fusion plasmas. A mega-watt gyrotron for electron cyclotron resonance heating is used as a probing beam in the large helical device. Spurious mode oscillations are often observed during the turning on/off phase of the modulation. The frequency spectra of the 77-GHz gyrotron output power have been measured, and then one of the spurious modes, which interferes w...

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Publisher copy:
10.1063/1.4740257

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Journal:
Review of scientific instruments
Volume:
83
Issue:
10
Pages:
10D731
Publication date:
2012-10-01
DOI:
EISSN:
1089-7623
ISSN:
0034-6748
Source identifiers:
358555
Language:
English
Pubs id:
pubs:358555
UUID:
uuid:1eba505c-56a0-43c3-9f0b-6d2504b2ff0a
Local pid:
pubs:358555
Deposit date:
2013-11-17

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