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 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.
- Authors:
-
[1];
- Auburn Univ., AL (United States). Dept. of Physics
- Univ. of Rochester, NY (United States). Dept. of Mechanical Engineering
- Publication Date:
- Research Org.:
- Univ. of Rochester, NY (United States); Auburn Univ., AL (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1474301
- Alternate Identifier(s):
- OSTI ID: 1372122; OSTI ID: 1594953
- Grant/Contract Number:
- FG02-93ER54215; Sc0014196
- Resource Type:
- 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. https://doi.org/10.1063/1.4994073
Guazzotto, L., and Betti, R. Fri .
"Tokamak two-fluid ignition conditions". United States. https://doi.org/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}
}
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