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pro vyhledávání: '"Särkimäki, Konsta"'
Autor:
Lier, Andrej, Papp, Gergely, Lauber, Philipp, Pusztai, Istvan, Särkimäki, Konsta, Embreus, Ola
In the event of a tokamak disruption in a D-T plasma, fusion-born alpha particles take several milliseconds longer to thermalise than the background. As the damping rates drop drastically following the several orders of magnitudes drop of temperature
Externí odkaz:
http://arxiv.org/abs/2301.07470
Runaway electrons (REs) present a high-priority issue for ITER but little is known about the extent to which RE generation is affected by the stochastic field intrinsic to disrupting plasmas. RE generation can be modelled with reduced kinetic models
Externí odkaz:
http://arxiv.org/abs/2203.09344
Experimental observations, as well as theoretical predictions, indicate that the transport of energetic electrons decreases with energy. This reduction in transport is attributed to finite orbit width (FOW) effects. Using orbit-following simulations
Externí odkaz:
http://arxiv.org/abs/2006.03726
Akademický článek
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Autor:
Särkimäki, Konsta
We present various techniques that make orbit-following Monte Carlo simulations faster and more reliable when assessing collisionless fast particle losses due to magnetic field perturbations. These techniques are based on identifying various loss cha
Externí odkaz:
http://arxiv.org/abs/1908.02494
Autor:
Varje, Jari, Särkimäki, Konsta, Kontula, Joona, Ollus, Patrik, Kurki-Suonio, Taina, Snicker, Antti, Hirvijoki, Eero, Äkäslompolo, Simppa
We present a novel implementation of a Monte Carlo particle-following code for solving the distribution function of minority species in fusion plasmas, called ASCOT5, and verify it using theoretical results for neoclassical transport. The code has be
Externí odkaz:
http://arxiv.org/abs/1908.02482
Using the orbit-following code ASCOT, we model alpha particle transport in ITER under the influence of ELM control coils (ECCs), toroidal field ripple, and test blanket modules, with emphasis on how the plasma response (PR) modifies the transport mec
Externí odkaz:
http://arxiv.org/abs/1709.04356
We report an accessible and robust tool for evaluating the effects of Coulomb collisions on a test particle in a plasma that obeys Maxwell-J\"uttner statistics. The implementation is based on the Beliaev-Budker collision integral which allows both th
Externí odkaz:
http://arxiv.org/abs/1701.05043
Assessment of the runaway electron load distribution in ITER during 3D MHD induced beam termination.
Publikováno v:
Plasma Physics & Controlled Fusion; Sep2024, Vol. 66 Issue 9, p1-15, 15p
An advection-diffusion model for cross-field runaway electron transport in perturbed magnetic fields
Disruption-generated runaway electrons (RE) present an outstanding issue for ITER. The predictive computational studies of RE generation rely on orbit-averaged computations and, as such, they lack the effects from the magnetic field stochasticity. Si
Externí odkaz:
http://arxiv.org/abs/1606.04409