Experimental relation between particle and energy confinement in reversed-field pinches

Sara Mazur; Peter Nordlund; Klaus-Dieter Zastrow; Jerzy H. Brzozowski; James R. Drake

doi:10.1103/PhysRevE.48.R680

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Experimental relation between particle and energy confinement in reversed-field pinches

Sara Mazur and Peter Nordlund

Klaus-Dieter Zastrow

Jerzy H. Brzozowski and James R. Drake

Department of Fusion Plasma Physics, The Alfvén Laboratory, Royal Institute of Technology, S-100 44 Stockholm, Sweden

Department of Physics I, Royal Institute of Technology, S-100 44 Stockholm, Sweden

Department of Fusion Plasma Physics, The Alfvén Laboratory, Royal Institute of Technology, S-100 44 Stockholm, Sweden

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Phys. Rev. E 48, R680(R) – Published 1 August, 1993

DOI: https://doi.org/10.1103/PhysRevE.48.R680

Abstract

Confinement studies have been performed on the high-aspect-ratio, high-current-density Extrap-T1 reversed-field pinch. Experimental evidence is presented that the scaling of the particle confinement time is not dominated by the dynamo activity. This results in an anticorrelation between particle confinement time and energy confinement time, which becomes apparent in this experiment, as the ratio of Spitzer to total input power is varied over the wide range 0.4–0.8.

References (17)

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[c1] H.A.B. Bodin, R.A. Krakowski and S. Ortolani, Fusion Technology 10, 307 (1986).

[c2] H.A.B. Bodin. Nucl. Fusion 30, 1717 (1990).

[c3] E.J. Caramana, R.A. Nebel and D.D. Schnack, Phys. Fluids 26, 1305 (1983).

[c4] K. Kusano and T. Sato, Nucl. Fusion 30, 2075 (1990).

[c5] Y.L. Ho and C.G. Craddock, Phys. Fluids B 3, 721 (1991).

[c6] A.R. Jacobson and R.W. Moses, Phys. Rev. A 29, 3335 (1984).

[c7] S. Mazur, P. Nordlund, K. D. Zastrow, J.H. Brzozowski, and J.R. Drake (unpublished).

[c8] J.C. Sprott, Phys. Fluids 31, 2266 (1988).

[c9] L.C. Johnson and E. Hinnov, J. Quant. Spectrosc. Radiat. Transf. 13, 333 (1973).

[c10] D.D. Schnack, D.C. Barnes, Z. Mikic, D.S. Harned, E.J. Caramana and R.A. Nebel, Comput. Phys. Commun. 43, 17 (1986).

[c11] S.C. Prager, Plasma Phys. Contr. Fusion 32, 903 (1990).

[c12] D.D. Schnack, H. Biglari, E.J. Caramana, B.A. Carreras, P.H. Diamond, F.Y. Gang, E. Hamieri, D.S. Harned, Y.L. Ho, J. McBride, R.A. Nebel, S.C. Prager, and H.R. Strauss, in Plasma Physics and Controlled Nuclear Fusion Research, Nice, 1988, Proceedings of the 12th International Conference (IAEA, Vienna, 1989).

[c13] N. Mattor, P.W. Terry and S.C. Prager, Comments Plasma Phys. Contr. Fusion 15, 65 (1992).

[c14] A. Almagri, S. Assadi, J. Beckstead, G. Chartras, M. Cudzinovic, D. Den Hartog, R. Dexter, S. Hokin, D. Holly, S. Prager, T. Rempel, J. Sarff, E. Scime, W. Shen, C. Spragins, C. Sprott, G. Starr, M. Stoneking, C. Watts, E. Klevans, R. Veerasingam, and R. Nebel, inPhysics of Alternative Confinement Schemes, edited by S. Ortolani and E. Sindoni, International School of Plasma Physics ``Piero Caldirola'' (Società Italiana di Fisica, Varenna, 1990), p. 667.

[c15] P.G. Carolan, A. Patel, M.C. Sexton and M.J. Walsh, Nucl. Fusion 30, 2616 (1990).

[c16] B. Alper, C.A. Bunting, P.G. Carolan, A. Patel, and M.J. Walsh, inProceedings of the 17th EPS Conference on Controlled Fusion and Plasma Heating, edited by G. Briffod, Adri Nijsen Vis, and F.C. Schüller (The European Physical Society, Amsterdam, 1990).

[c17] S. Ortolani, Plasma Phys. Contr. Fusion 34, 1903 (1992).

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Experimental relation between particle and energy confinement in reversed-field pinches

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