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Diagnosing Fuel Ion...
Diagnosing Fuel Ions in Fusion Plasmas using Neutron Emission Spectroscopy
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- Hellesen, Carl, 1980- (författare)
- Uppsala universitet,Tillämpad kärnfysik,Fusion diagnostics
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- Ericsson, Göran, Docent (preses)
- Uppsala universitet,Tillämpad kärnfysik
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- Conroy, Sean, Dr (preses)
- Uppsala universitet,Tillämpad kärnfysik
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- Heidbrink, William W, Dr (opponent)
- University of California, Irvine
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(creator_code:org_t)
- ISBN 9789155477271
- Uppsala : Acta Universitatis Upsaliensis, 2010
- Engelska 87 s.
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Serie: Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, 1651-6214 ; 716
- Relaterad länk:
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Neutron emission spectra, measured with the time of flight spectrometer TOFOR, at the joint European torus (JET) are presented in this thesis. TOFOR has been in use since 2005, routinely measuring the neutron emission from JET plasmas. The work in the thesis mainly concerns the modeling of the signatures in the neutron spectrum that reveal different parts of the fuel ion distribution, such as the thermal bulk plasma as well as energetic ions from neutral beam and ion cyclotron heating. Parametric models of the signatures, using plasma parameters as input, are employed to generate trial neutron spectra. The parameters, such as the fuel ion temperature or the fast ion distribution function, are deduced by iteratively fitting the trial spectra to the measured data. Measurements with TOFOR have been made and the models were applied. The studies are mainly on neutrons from d(d, n)3 He reactions(DD), although the emission from reactions with the plasma impurity 9 Be and triton burn up is covered as well. This has allowed for detailed studies of e.g. the physics ICRF heating as well as the interactions between energetic ions and plasma instabilities, such as toroidal Alfvé Eigenmodes.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Nyckelord
- fusion
- plasma diagnostics
- neutron spectroscopy
- NBI heating
- ICRF heating
- energetic ions
- Fusion
- Fusion
- Nuclear physics
- Kärnfysik
- Applied Nuclear Physics
- Tillämpad kärnfysik
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