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Validating TRANSP simulations Using Neutron Emission Spectroscopy with Dual Sight Lines
(Fusion diagnostics)
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2008 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 79, no 10, E510- p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
2008. Vol. 79, no 10, E510- p.
Identifiers
URN: urn:nbn:se:uu:diva-114445OAI: oai:DiVA.org:uu-114445DiVA: diva2:294068
Available from: 2010-02-16 Created: 2010-02-16 Last updated: 2017-12-12
In thesis
1. Diagnosing Fuel Ions in Fusion Plasmas using Neutron Emission Spectroscopy
Open this publication in new window or tab >>Diagnosing Fuel Ions in Fusion Plasmas using Neutron Emission Spectroscopy
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

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.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2010. 87 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 716
Keyword
fusion, plasma diagnostics, neutron spectroscopy, NBI heating, ICRF heating, energetic ions
National Category
Fusion, Plasma and Space Physics Subatomic Physics
Research subject
Applied Nuclear Physics
Identifiers
urn:nbn:se:uu:diva-114449 (URN)978-91-554-7727-1 (ISBN)
Public defence
2010-03-31, Häggsalen, Lägerhyddsvägen 1, Ångströmslaboratoriet, 10:15 (English)
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Supervisors
Available from: 2010-03-10 Created: 2010-02-16 Last updated: 2010-03-10Bibliographically approved

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Gatu Johnson, Maria

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