Modification of neutron emission spectrum by Alfvén eigenmodes in a deuterium–tritium plasma
| Autor: | Hideaki Matsuura, Shota Sugiyama |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Tokamak Toroid Neutron emission Astrophysics::High Energy Astrophysical Phenomena Mechanical Engineering Plasma 01 natural sciences 010305 fluids & plasmas law.invention Magnetic field Distribution function Nuclear Energy and Engineering Deuterium Physics::Plasma Physics law Excited state Physics::Space Physics 0103 physical sciences General Materials Science Atomic physics 010306 general physics Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 146:320-324 |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2018.12.055 |
| Popis: | The neutron emission spectrum can be modified from Gaussian due to excited Alfven eigenmodes (AEs). We evaluate the neutron emission spectrum when the fuel-ion velocity distribution functions are distorted by AEs, assuming an ITER-like deuterium–tritium tokamak plasma. When shear AEs are excited by energetic particles in a plasma, the non-Maxwellian tails are created in the fuel-ion distribution functions in directions that are parallel and antiparallel to the magnetic field lines. Due to formation of these tails, the non-Gaussian components are formed in the neutron emission spectrum in the same and opposite directions of the toroidal axis. The anisotropic, non-Gaussian neutron emission spectrum can be used for experimental verification and diagnostics of the non-Maxwellian tails in the fuel-ion velocity distribution functions formed by AEs. |
| Databáze: | OpenAIRE |
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