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Finite Larmor radii effects in fast ion measurements as demonstrated using neutron emission spectrometry of JET plasmas heated with 3rd harmonic ICRF
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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2011 (English)In: 38th EPS Conference on Plasma Physics 2011 (EPS 2011): Europhysics Conference Abstracts, 2011Conference paper, Published paper (Other academic)
Abstract [en]

This paper demonstrates how the finite Larmor radii (FLR) of fast ions can affect fast ion measurements by studying data from the neutron time-of-flight spectrometer TOFOR. Neutron spectra were calculated from a model of the fast ion velocity distribution for a JET experiment with 3rd harmonic ICRF heating of deuterium beams. It was found that  FLR effects need to be considered to get a good description of the data,  if the Larmor radius of the fast ions are comparable to the width of the field of view of the instrument. This applies not only to results from neutron spectrometry but also to other types of fast ion diagnostics.

Place, publisher, year, edition, pages
2011.
Keyword [en]
nuclear fusion, neutron spectrometry, fast ions, finite Larmor radius effects
National Category
Fusion, Plasma and Space Physics
Research subject
Physics with specialization in Applied Nuclear Physics
Identifiers
URN: urn:nbn:se:uu:diva-234737ISBN: 2-914771-68-1 (print)OAI: oai:DiVA.org:uu-234737DiVA: diva2:757742
Conference
38th EPS Conference on Plasma Physics, Strasbourg, France, 2011
Available from: 2014-10-23 Created: 2014-10-23 Last updated: 2014-10-23

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http://ocs.ciemat.es/EPS2011PAP/pdf/P2.049.pdf

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Eriksson, Jacob

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