Plasma Diagnostics Required for a Heliotron-Type DEMO Reactor

Mitsutaka ISOBE; Tsuyoshi AKIYAMA; Tokihiko TOKUZAWA; Teruya TANAKA; Daiji KATO; Hiroyuki A. SAKAUE; Takuya GOTO; Junichi MIYAZAWA; Akio SAGARA; the FFHR Design Group

doi:10.1585/pfr.7.2405053

Regular Articles

Plasma Diagnostics Required for a Heliotron-Type DEMO Reactor

Mitsutaka ISOBE, Tsuyoshi AKIYAMA, Tokihiko TOKUZAWA, Teruya TANAKA, Daiji KATO, Hiroyuki A. SAKAUE, Takuya GOTO, Junichi MIYAZAWA, Akio SAGARA, the FFHR Design Group

Author information

Mitsutaka ISOBE
National Institute for Fusion Science
Department of Fusion Science, The Graduate University for Advanced Studies
Tsuyoshi AKIYAMA
National Institute for Fusion Science
Tokihiko TOKUZAWA
National Institute for Fusion Science
Teruya TANAKA
National Institute for Fusion Science
Department of Fusion Science, The Graduate University for Advanced Studies
Daiji KATO
National Institute for Fusion Science
Hiroyuki A. SAKAUE
National Institute for Fusion Science
Takuya GOTO
National Institute for Fusion Science
Junichi MIYAZAWA
National Institute for Fusion Science
Department of Fusion Science, The Graduate University for Advanced Studies
Akio SAGARA
National Institute for Fusion Science
Department of Fusion Science, The Graduate University for Advanced Studies
the FFHR Design Group
National Institute for Fusion Science

Keywords: DEMO, plasma diagnostics, neutron energy spectrometry

JOURNAL FREE ACCESS

2012 Volume 7 Pages 2405053

DOI https://doi.org/10.1585/pfr.7.2405053

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Abstract

The plasma diagnostics required for a heliotron-type DEMO reactor are discussed in terms of real-time burn control and safe operation of the machine. The minimum diagnostic set having the smallest footprint are essential in DEMO. Neutron transport calculation suggests that the diagnostic components used in existing experiments will deteriorate immediately in a DEMO reactor hall if they are not protected by a neutron shield. Neutron energy spectrometry is a promising diagnostic that is expected to play an important role in diagnosing DEMO plasmas, providing a fusion energy output, fuel ion temperature, ratio of deuteron density n_D to triton density n_T, and velocity distribution of confined α particles.

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