Predictive Fokker–Planck Modelling of Confined and Lost Fusion Alpha Particles in ITER
| Autor: | S. E. Sharapov, Lars-Goran Eriksson, V.A. Yavorskij, K. Schoepf, V. Goloborod'ko, Vasili Kiptily |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Nuclear and High Energy Physics Magnetic confinement fusion Alpha particle Plasma Electron Fusion power 01 natural sciences 010305 fluids & plasmas Nuclear physics Distribution function Nuclear Energy and Engineering Physics::Plasma Physics 0103 physical sciences Nuclear fusion Fokker–Planck equation 010306 general physics |
| Zdroj: | Journal of Fusion Energy |
| ISSN: | 1572-9591 0164-0313 |
| DOI: | 10.1007/s10894-015-9862-2 |
| Popis: | The paper represents results of predictive 3D Fokker–Planck modelling of phase space distributions of fusion alpha particles for basic ITER scenarios (Polevoi et al. in J Plasma Fusion Res Ser 5:82, 2002). We simulate the poloidal profiles of alpha induced current as well as of the fusion power deposition to bulk plasma electrons. It is demonstrated that anisotropy of velocity distributions of alphas results in a rather strong alpha driven current that makes up about 10–15 % of the equilibrium plasma current density in the 4th ITER scenario. We investigate the impact of the alpha driven current on the ITER magnetic configuration. In the 4th scenario fusion alphas are shown to result in ~15 % enhancement of the rotational transform and in ~11 % enlargement of the Shafranov shift of magnetic flux surfaces. Also we evaluate the capability of gamma diagnostics of high-energy alphas in ITER and examine the collisional losses of fusion alpha particles. |
| Databáze: | OpenAIRE |
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