Installation of New Electron Cyclotron Emission Imaging in LHD

A new electron cyclotron emission imaging antenna was designed and installed outside the torus on LHD. To improve the signal quality, we developed a local oscillator integrated antenna array (LIA), in which each channel has an internal local oscillation supply from a frequency-multiplier-integrated...

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Bibliographic Details
Published in:Plasma and Fusion Research 2018/06/12, Vol.13, pp.3402063-3402063
Main Authors: TSUCHIYA, Hayato, KUWAHARA, Daisuke, TOKUZAWA, Tokihiko, NAGAYAMA, Yoshio, TAKEMURA, Yuki, Group, LHD Experiment
Format: Article
Language:English
Subjects:
ECEI
LHD
microwave optics
multi horn antenna array
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Summary:A new electron cyclotron emission imaging antenna was designed and installed outside the torus on LHD. To improve the signal quality, we developed a local oscillator integrated antenna array (LIA), in which each channel has an internal local oscillation supply from a frequency-multiplier-integrated circuit. The labyrinth structure of the optical system comprises five mirrors to protect the LIA from plasma neutron emission. The initial results were obtained from the 2017 LHD experimental campaign. The MHD fluctuations and their fluctuation profiles were observed.
ISSN:1880-6821
1880-6821
DOI:10.1585/pfr.13.3402063