Plasma and Fusion Research

Volume 10, 3405025 (2015)

Regular Articles

Characterization of Secondary Electron Collection for Energy Recovery from High Energy Ions with a Magnetic Field
Shota HAGIHARA, Takayuki WADA, Satoshi NAKAMOTO, Hiromasa TAKENO, Yasuyoshi YASAKA, Yuichi FURUYAMA1) and Akira TANIIKE1)
Electrical and Electronic Engineering, Kobe University, Kobe 657-8501, Japan
Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022, Japan
(Received 25 November 2014 / Accepted 6 February 2015 / Published 19 March 2015)


A traveling wave direct energy converter (TWDEC) is expected to be used as an energy recovery device for fast protons produced during the D-3He nuclear fusion reaction. Some protons, however, are not fully decelerated and pass through the device. A secondary electron direct energy converter (SEDEC) was proposed as an additional device to recover the protons passing through a TWDEC. In our previous study, magnetic field was applied for efficient secondary electron (SE) collection, but the SEs were reflected close to the collector due to the magnetic mirror effect and the collection was degraded. Herein, a new arrangement of magnets is proposed to be set away from the collector, and experiments in various conditions are performed. An appropriate arrangement away from the collector resulted in the improvement of SE collection.


advanced fusion, direct energy conversion, secondary electron, magnetic mirror

DOI: 10.1585/pfr.10.3405025


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This paper may be cited as follows:

Shota HAGIHARA, Takayuki WADA, Satoshi NAKAMOTO, Hiromasa TAKENO, Yasuyoshi YASAKA, Yuichi FURUYAMA and Akira TANIIKE, Plasma Fusion Res. 10, 3405025 (2015).