TY - JOUR
T1 - Dielectric tensor expression for non-Maxwellian distribution functions and applications to α-particle damping in ICRH
AU - Koch, R.
PY - 1991/8/5
Y1 - 1991/8/5
N2 - A general expression of the dielectric tensor of a non-Maxwellian plasma is derived. Parasitic damping of the fast wave by fusion-generated alpha particles in ion cyclotron heating scenarios is investigated using a realistic slowing down distribution function. This indicates that despite the large birth velocity of α-particles their cyclotron damping is as small as the one of an equivalent Maxwellian with the temperature of 0.6 MeV. This reduces significantly the impact of α-particle absorption on the fundamental D and second harmonic T scenarios in D-T plasmas.
AB - A general expression of the dielectric tensor of a non-Maxwellian plasma is derived. Parasitic damping of the fast wave by fusion-generated alpha particles in ion cyclotron heating scenarios is investigated using a realistic slowing down distribution function. This indicates that despite the large birth velocity of α-particles their cyclotron damping is as small as the one of an equivalent Maxwellian with the temperature of 0.6 MeV. This reduces significantly the impact of α-particle absorption on the fundamental D and second harmonic T scenarios in D-T plasmas.
UR - http://www.scopus.com/inward/record.url?scp=0000604778&partnerID=8YFLogxK
U2 - 10.1016/0375-9601(91)90877-B
DO - 10.1016/0375-9601(91)90877-B
M3 - Article
AN - SCOPUS:0000604778
SN - 0375-9601
VL - 157
SP - 399
EP - 405
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 6-7
ER -