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Title: Tokamak two-fluid ignition conditions

Abstract

This work focuses on modeling the properties needed by a plasma to reach ignition, where ignition is the condition in which fusion power is produced at the steady state without any external input power. We extend the classic work by Lawson giving the ptots τE (product between density, temperature, and energy confinement time) needed for ignition [J. D. Lawson, Proc. Phys. Soc. London, Sect. B 70, 6 (1957)] by improving the original zero-dimensional, single fluid model. The effect of multi-fluid physics is included, by distinguishing ions, electrons, and a particles. The effects of one-dimensional density and temperature profiles are also considered. It is found that the multi-fluid model predicts a larger Lawson product required for ignition than the single-fluid one. A detailed analysis of the energy confinement times for each species and energy equilibration times between species shows that the electron energy confinement time is the parameter more strongly affecting the Lawson product needed for ignition. In conclusion, it is also found that peaked profiles (of either temperature or density) require a smaller Lawson product for ignition than flat profiles.

Authors:
ORCiD logo [1];  [2]
  1. Auburn Univ., AL (United States). Dept. of Physics
  2. Univ. of Rochester, NY (United States). Dept. of Mechanical Engineering
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1474301
Alternate Identifier(s):
OSTI ID: 1372122
Grant/Contract Number:  
FG02-93ER54215
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 8; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Guazzotto, L., and Betti, R. Tokamak two-fluid ignition conditions. United States: N. p., 2017. Web. doi:10.1063/1.4994073.
Guazzotto, L., & Betti, R. Tokamak two-fluid ignition conditions. United States. doi:10.1063/1.4994073.
Guazzotto, L., and Betti, R. Fri . "Tokamak two-fluid ignition conditions". United States. doi:10.1063/1.4994073. https://www.osti.gov/servlets/purl/1474301.
@article{osti_1474301,
title = {Tokamak two-fluid ignition conditions},
author = {Guazzotto, L. and Betti, R.},
abstractNote = {This work focuses on modeling the properties needed by a plasma to reach ignition, where ignition is the condition in which fusion power is produced at the steady state without any external input power. We extend the classic work by Lawson giving the ptotsτE (product between density, temperature, and energy confinement time) needed for ignition [J. D. Lawson, Proc. Phys. Soc. London, Sect. B 70, 6 (1957)] by improving the original zero-dimensional, single fluid model. The effect of multi-fluid physics is included, by distinguishing ions, electrons, and a particles. The effects of one-dimensional density and temperature profiles are also considered. It is found that the multi-fluid model predicts a larger Lawson product required for ignition than the single-fluid one. A detailed analysis of the energy confinement times for each species and energy equilibration times between species shows that the electron energy confinement time is the parameter more strongly affecting the Lawson product needed for ignition. In conclusion, it is also found that peaked profiles (of either temperature or density) require a smaller Lawson product for ignition than flat profiles.},
doi = {10.1063/1.4994073},
journal = {Physics of Plasmas},
number = 8,
volume = 24,
place = {United States},
year = {Fri Jul 21 00:00:00 EDT 2017},
month = {Fri Jul 21 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
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