L-particle transport-driven current in Tokamaks

Jukka Heikkinen, Seppo Sipilä

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

It is shown that the radial transport of fusion-born energetic α particles, induced by electrostatic waves traveling in one poloidal direction, is directly connected to a net momentum of α particles in the toroidal direction in tokamaks. Because the momentum change is almost independent of toroidal velocity, the energy required for the momentum generation remains small on an α-particle population sustained by an isotropic time-independent source. By numerical toroidal Monte Carlo calculations it is shown that the current carried by α particles in the presence of intense well penetrated waves can reach several mega-amperes in reactor-sized tokamaks. The current obtained can greatly exceed the neoclassical bootstrap current of the α particles.
Original languageEnglish
Pages (from-to)1655-1658
JournalPhysical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume51
Issue number3
DOIs
Publication statusPublished - 1995
MoE publication typeA1 Journal article-refereed

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Particle Transport
momentum
Momentum
electrostatic waves
energetic particles
fusion
Traveling Wave
Electrostatics
Bootstrap
Reactor
reactors
Fusion
Exceed
Energy
energy

Cite this

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title = "L-particle transport-driven current in Tokamaks",
abstract = "It is shown that the radial transport of fusion-born energetic α particles, induced by electrostatic waves traveling in one poloidal direction, is directly connected to a net momentum of α particles in the toroidal direction in tokamaks. Because the momentum change is almost independent of toroidal velocity, the energy required for the momentum generation remains small on an α-particle population sustained by an isotropic time-independent source. By numerical toroidal Monte Carlo calculations it is shown that the current carried by α particles in the presence of intense well penetrated waves can reach several mega-amperes in reactor-sized tokamaks. The current obtained can greatly exceed the neoclassical bootstrap current of the α particles.",
author = "Jukka Heikkinen and Seppo Sipil{\"a}",
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journal = "Physical review E",
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L-particle transport-driven current in Tokamaks. / Heikkinen, Jukka; Sipilä, Seppo.

In: Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 51, No. 3, 1995, p. 1655-1658.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - L-particle transport-driven current in Tokamaks

AU - Heikkinen, Jukka

AU - Sipilä, Seppo

PY - 1995

Y1 - 1995

N2 - It is shown that the radial transport of fusion-born energetic α particles, induced by electrostatic waves traveling in one poloidal direction, is directly connected to a net momentum of α particles in the toroidal direction in tokamaks. Because the momentum change is almost independent of toroidal velocity, the energy required for the momentum generation remains small on an α-particle population sustained by an isotropic time-independent source. By numerical toroidal Monte Carlo calculations it is shown that the current carried by α particles in the presence of intense well penetrated waves can reach several mega-amperes in reactor-sized tokamaks. The current obtained can greatly exceed the neoclassical bootstrap current of the α particles.

AB - It is shown that the radial transport of fusion-born energetic α particles, induced by electrostatic waves traveling in one poloidal direction, is directly connected to a net momentum of α particles in the toroidal direction in tokamaks. Because the momentum change is almost independent of toroidal velocity, the energy required for the momentum generation remains small on an α-particle population sustained by an isotropic time-independent source. By numerical toroidal Monte Carlo calculations it is shown that the current carried by α particles in the presence of intense well penetrated waves can reach several mega-amperes in reactor-sized tokamaks. The current obtained can greatly exceed the neoclassical bootstrap current of the α particles.

U2 - 10.1103/PhysRevE.51.R1655

DO - 10.1103/PhysRevE.51.R1655

M3 - Article

VL - 51

SP - 1655

EP - 1658

JO - Physical review E

JF - Physical review E

SN - 2470-0045

IS - 3

ER -