Molecular dynamics calculation of the spectral densities of plasma fluctuations

Panarese, A.Univ Bari, Dept Chem, I-70126 Bari, Italy.;CNR, Inst Nanotechnol NANOTEC, I-70126 Bari, Italy. (författare)

QC 20181210
Spectral densities of plasma fluctuations are calculated for the thermal case using classical molecular dynamics (MD) assuming Coulomb interactions and a short-range cutoff radius. The aim of the calculation is to verify limits and performances of such calculations in the light of possible generalizations, e.g. collisional or non-ideal plasmas. Results are presented for ideal, collisionless, fully ionized thermal plasmas. Comparison with the analytical theory reveals a generally satisfactory agreement with possibility for improvement when more strict numerical parameters are used albeit with a strong increase in computational cost. The largest deviations have been observed in the vicinity of the weakly damped eigenmodes. The agreement is strong in other parts of the spectrum, where Landau damping is prominent, and overcomes the effects stemming from the excess collisionality and coupling as well as from the exclusion of short-range collisions.

Bruno, D.CNR, Inst Nanotechnol NANOTEC, I-70126 Bari, Italy. (författare)
Tolias, Panagiotis,1984-KTH,Rymd- och plasmafysik,st Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy.(Swepub:kth)u1p3186s (författare)
Ratynskaia, Svetlana V.KTH,Rymd- och plasmafysik(Swepub:kth)u1p4172h (författare)
Longo, S.Univ Bari, Dept Chem, I-70126 Bari, Italy.;CNR, Inst Nanotechnol NANOTEC, I-70126 Bari, Italy. (författare)
de Angelis, U.Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy. (författare)
Univ Bari, Dept Chem, I-70126 Bari, Italy.;CNR, Inst Nanotechnol NANOTEC, I-70126 Bari, Italy.CNR, Inst Nanotechnol NANOTEC, I-70126 Bari, Italy. (creator_code:org_t)

Av författaren/redakt...: Panarese, A.; Bruno, D.; Tolias, Panagiot ...; Ratynskaia, Svet ...; Longo, S.; de Angelis, U.

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