TY - JOUR
T1 - Modification of neutron emission spectrum by Alfvén eigenmodes in a deuterium–tritium plasma
AU - Sugiyama, Shota
AU - Matsuura, Hideaki
N1 - Funding Information:
This work was supported by JSPS, Grant-in-Aid for JSPS Fellows, 18J12685.
Funding Information:
This work was supported by JSPS , Grant-in-Aid for JSPS Fellows, 18J12685 .
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/9
Y1 - 2019/9
N2 - The neutron emission spectrum can be modified from Gaussian due to excited Alfvén 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.
AB - The neutron emission spectrum can be modified from Gaussian due to excited Alfvén 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.
UR - http://www.scopus.com/inward/record.url?scp=85058963816&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85058963816&partnerID=8YFLogxK
U2 - 10.1016/j.fusengdes.2018.12.055
DO - 10.1016/j.fusengdes.2018.12.055
M3 - Article
AN - SCOPUS:85058963816
SN - 0920-3796
VL - 146
SP - 320
EP - 324
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
ER -