skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Helium Transport in Advanced Tokamak Scenarios with Internal Transport Barrier

Abstract

The results are presented of investigations on advanced scenarios for plasmas of next-generation tokamaks by means of a 1 1/2-dimensional transport code. The role of thermonuclear alpha particles and helium ash is analyzed by a two-group model and by introducing experimentally validated mixed Bohm/gyroBohm models on the assumption that the diffusion of helium ash can be treated like the diffusion of bulk plasma ions. Recycling of helium ash is modeled by introducing a wall source. Results are presented of parameter studies presenting the equilibrium helium fraction as a function of the recycling factor. It is shown that for a given scenario, the fraction of effective helium confinement time and energy confinement time is a time-dependent quantity and not a constant, as was assumed in earlier research.

Authors:
 [1];  [2];  [2];  [3]
  1. Austrian Research Center Seibersdorf (Austria)
  2. Commissariat a l'Energie Atomique (France)
  3. Kurchatov Institute (Russian Federation)
Publication Date:
OSTI Identifier:
20845781
Resource Type:
Journal Article
Journal Name:
Fusion Science and Technology
Additional Journal Information:
Journal Volume: 39; Journal Issue: 2; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1536-1055
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALPHA PARTICLES; CHARGED-PARTICLE TRANSPORT; CONFINEMENT TIME; DIFFUSION; EQUILIBRIUM; HELIUM; HELIUM ASH; PLASMA; TIME DEPENDENCE; TOKAMAK DEVICES

Citation Formats

Kamelander, Gerald, Litaudon, Xavier, Moreau, Didier, and Voitsekhovitch, Irina. Helium Transport in Advanced Tokamak Scenarios with Internal Transport Barrier. United States: N. p., 2001. Web.
Kamelander, Gerald, Litaudon, Xavier, Moreau, Didier, & Voitsekhovitch, Irina. Helium Transport in Advanced Tokamak Scenarios with Internal Transport Barrier. United States.
Kamelander, Gerald, Litaudon, Xavier, Moreau, Didier, and Voitsekhovitch, Irina. 2001. "Helium Transport in Advanced Tokamak Scenarios with Internal Transport Barrier". United States.
@article{osti_20845781,
title = {Helium Transport in Advanced Tokamak Scenarios with Internal Transport Barrier},
author = {Kamelander, Gerald and Litaudon, Xavier and Moreau, Didier and Voitsekhovitch, Irina},
abstractNote = {The results are presented of investigations on advanced scenarios for plasmas of next-generation tokamaks by means of a 1 1/2-dimensional transport code. The role of thermonuclear alpha particles and helium ash is analyzed by a two-group model and by introducing experimentally validated mixed Bohm/gyroBohm models on the assumption that the diffusion of helium ash can be treated like the diffusion of bulk plasma ions. Recycling of helium ash is modeled by introducing a wall source. Results are presented of parameter studies presenting the equilibrium helium fraction as a function of the recycling factor. It is shown that for a given scenario, the fraction of effective helium confinement time and energy confinement time is a time-dependent quantity and not a constant, as was assumed in earlier research.},
doi = {},
url = {https://www.osti.gov/biblio/20845781}, journal = {Fusion Science and Technology},
issn = {1536-1055},
number = 2,
volume = 39,
place = {United States},
year = {Thu Mar 15 00:00:00 EST 2001},
month = {Thu Mar 15 00:00:00 EST 2001}
}