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MeV-range velocity-space tomography from gamma-ray and neutron emission spectrometry measurements at JET
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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2017 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 57, no 5, article id 056001Article in journal (Refereed) Published
Abstract [en]

We demonstrate the measurement of a 2D MeV-range ion velocity distribution function by velocity-space tomography at JET. Deuterium ions were accelerated into the MeV-range by third harmonic ion cyclotron resonance heating. We made measurements with three neutron emission spectrometers and a high-resolution gamma-ray spectrometer detecting the gamma-rays released in two reactions. The tomographic inversion based on these five spectra is in excellent agreement with numerical simulations with the ASCOT-RFOF and the SPOT-RFOF codes. The length of the measured fast-ion tail corroborates the prediction that very few particles are accelerated above 2 MeV due to the weak wave-particle interaction at higher energies.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2017. Vol. 57, no 5, article id 056001
Keywords [en]
gamma-ray spectrometry, neutron emission spectrometry, velocity-space tomography, fast ions, tokamak
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-321793DOI: 10.1088/1741-4326/aa60e9ISI: 000398746700001OAI: oai:DiVA.org:uu-321793DiVA, id: diva2:1094787
Available from: 2017-05-11 Created: 2017-05-11 Last updated: 2018-04-23Bibliographically approved

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Binda, FedericoEricsson, GöranEriksson, JacobHellesen, CarlHjalmarsson, Anders

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