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Transformer recharging with alpha channeling in tokamaks

Published online by Cambridge University Press:  22 January 2010

N. J. FISCH*
Affiliation:
Princeton Plasma Physics Laboratory, Princeton University, Princeton, NJ 08543, USA (fisch@princeton.edu)

Abstract

Transformer recharging with lower hybrid waves in tokamaks can give low average auxiliary power if the resistivity is kept high enough during the radio frequency recharging stage. At the same time, operation in the hot ion mode via alpha channeling increases the effective fusion reactivity. This paper addresses the extent to which these two large cost-saving steps are compatible.

Type
Papers
Copyright
Copyright © Cambridge University Press 2010

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References

[1]Fisch, N. J. 1987 Theory of RF current drive. Rev. Mod. Phys. 59, 234.CrossRefGoogle Scholar
[2]Fisch, N. J. 1978 Confining a tokamak plasma with RF-driven currents. Phys. Rev. Lett. 41, 873.CrossRefGoogle Scholar
[3]Wong, K. L. and Ono, M. 1984 Effects of ion-cyclotron harmonic damping on current drive in the lower hybrid frequency range. Nucl. Fusion 24, 615.CrossRefGoogle Scholar
[4]Fisch, N. J. and Rax, J. M. 1992 Current drive by lower hybrid waves in the presence of energetic alpha-particles. Nucl. Fusion 32, 549.CrossRefGoogle Scholar
[5]Tuccillo, A. A. et al. 2005 Progress in LHCD: A tool for advanced regimes on ITER. Plasma Phys. Control. Fusion 47, B363.CrossRefGoogle Scholar
[6]Gormezano, C. et al. 2007 Chapter 6: Steady state operation. Nucl. Fusion 47, S285.CrossRefGoogle Scholar
[7]Fisch, N. J. and Boozer, A. H. 1980 Creating an anisotropic plasma resistivity. Phys. Rev. Lett. 45, 720.CrossRefGoogle Scholar
[8]Wort, D. J. H. 1971 Peristaltic Tokamak. Plasma Phys. 13, 258.CrossRefGoogle Scholar
[9]Fisch, N. J. and Karney, C. F. F. 1981 Current generation with low-frequency waves. Phys. Fluids 24, 27.CrossRefGoogle Scholar
[10]Fisch, N. J. 1981 Current generation by minority-species heating. Nucl. Fusion 1, 15.CrossRefGoogle Scholar
[11]Bolton, R. A. et al. 1978 In: Proc. 3rd Top. Meeting Techno. Cont. Nuclear Fusion, Vol. II (ed. Powell, J. R. and Eterno, C. T.). CONF-780509, p. 824.Google Scholar
[12]Fisch, N. J. 1981 Operating tokamaks with steady-state toroidal current. In: Proc. 4th Top. Conf. RF Plasma Heat (ed. Bengtson, R. and Oakes, M.), University of Texas, Austin, p. B1.Google Scholar
[13]Fisch, N. J. and Rax, J. M. 1992 Interaction of α-particles with intense lower hybrid waves. Phys. Rev. Lett. 69, 612.CrossRefGoogle ScholarPubMed
[14]Fisch, N. J. and Herrmann, M. C. 1995 Alpha channeling with two waves. Nucl. Fusion 35 (12), 1753.CrossRefGoogle Scholar
[15]Valeo, E. J. and Fisch, N. J. 1994 Excitation of large-kθ ion Bernstein waves in tokamaks. Phys. Rev. Lett. 73, 3536.CrossRefGoogle ScholarPubMed
[16]Fisch, N. J. et al. 1995 Alpha channeling using ion Bernstein waves. Phys. Plasmas 2, 2375.CrossRefGoogle Scholar
[17]Herrmann, M. C. and Fisch, N. J. 1997 Cooling energetic α particles in a tokamak with waves. Phys. Rev. Lett. 79, 1495.CrossRefGoogle Scholar
[18]Clark, D. S. and Fisch, N. J. 2000 Fast ion diffusion by driven contained modes. Phys. Plasmas 7, 2923.Google Scholar
[19]Leuterer, F. et al. 1985 Recharging of the ohmic-heating transformer by means of lower-hybrid current drive in the ASDEX tokamak. Phys. Rev. Lett. 55, 75.CrossRefGoogle ScholarPubMed
[20]Takase, Y. et al. 1987 Plasma current ramp-up and ohmic-heating transformer recharging experiments using lower-hybrid waves on a tokamak. Phys. Fluids 30, 1169.CrossRefGoogle Scholar
[21]Chen, Z. Y. et al. 2005 Ohmic radio-frequency synergy current drive and transformer recharging experiments in the HT-7 tokamak. Chinese Phys. Lett. 22, 1721.Google Scholar
[22]Giruzzi, G. et al. 2003 New tokamak plasma regime with stationary temperature oscillations. Phys. Rev. Lett. 91, 135001.CrossRefGoogle ScholarPubMed
[23]Karney, C. F. F. et al. 1985 Comparison of the theory and the practice of lower hybrid current drive. Phys. Rev. A 32, 2554.CrossRefGoogle ScholarPubMed
[24]Najmabadi, F. et al. 1991 The ARIES-I tokamak reactor study. Final Report, UCLA-PPG-1323, UCLA, CA.Google Scholar
[25]Fisch, N. J. and Herrmann, M. C. 1994 Utility of extracting power from alpha particles by waves. Nucl. Fusion 34, 1541.CrossRefGoogle Scholar
[26]Fisch, N. J. 1985 Conductivity of RF-heated plasma. Phys. Fluids 28, 245.CrossRefGoogle Scholar
[27]Shukla, P. K. et al. 1978 Filamentation and spatial attenuation of the lower hybrid waves in tokamaks. In: Proc. Joint Varena–Grenoble Symposium on Heating in Toroidal Plasma, Vol. I. Oxford: Pergamon Press, 1979, p. 173.Google Scholar