224 citations · 884 across the 45 of their papers we have counts for
45 papers
Multispecies structure-preserving particle discretization of the Landau collision operator
Filippo Zonta, Joseph V. Pusztay, Eero Hirvijoki
This paper proposes a novel numerical integrator for modeling multispecies Coulomb collisions in kinetic plasmas. The proposed scheme provides an energy-, momentum-, and positivity…
Parametric scaling of power exhaust in EU-DEMO alternative divertor simulations
A. E. Järvinen, L. Aho-Mantila, T. Lunt +3
Investigations of parametric scaling of power exhaust in the alternative divertor configuration (ADC) SOLPS-ITER simulation database of the EU-DEMO are conducted and compared to pr…
Bayesian approach for validation of runaway electron simulations
Aaro Järvinen, Tünde Fülöp, Eero Hirvijoki +3
Plasma-terminating disruptions in future fusion reactors may result in conversion of the initial current to a relativistic runaway electron beam. Validated predictive tools are req…
Metriplectic foundations of gyrokinetic Vlasov-Maxwell-Landau theory
Eero Hirvijoki, Joshua W. Burby, Alain J. Brizard
This letter reports on a metriplectic formulation of collisional, nonlinear full- electromagnetic gyrokinetic theory compliant with energy conservation and monotonic entropy pro…
Nearly-periodic maps and geometric integration of noncanonical Hamiltonian systems
J. W. Burby, E. Hirvijoki, M. Leok
M. Kruskal showed that each continuous-time nearly-periodic dynamical system admits a formal symmetry, generated by the so-called roto-rate. When the nearly-periodic system…
On the accuracy of the binary-collision algorithm in particle-in-cell simulations of magnetically confined fusion plasmas
Timo P. Kiviniemi, Eero Hirvijoki, Antti J. Virtanen
Ideally, binary-collision algorithms conserve kinetic momentum and energy. In practice, the finite size of collision cells and the finite difference in the particle locations affec…