Abstract
Solar spicules are luminous jets that erupt up to 10 000 km from the surface of the Sun and have diameters, all along their length, of only about 150–200 km. We first review some recent observations made at the Hα wavelength. According to our models, a solar spicule is a self-channelled proton beam emitted by a magnetic element and surrounded by a cold sheath. The beam originates in a self-excited dynamo that exploits a v × B field and that could be situated either below or above the element, where v is the local plasma velocity and B is the local magnetic flux density. In falling back, the sheath provides a return current of protons that cancels the outgoing current. We discuss the channelling of charged-particle beams of very large cross-section and propose velocity channelling, which is apparently a new concept. We assume a steady state and a hydrogen plasma.
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Alexeff, I.: 1989, IEEE Trans. Plasma Sci. 17, 282.
Alissandrakis, E. C., Dialetis, D., and Tsiropoulos, G.: 1987, Astron. Astrophys. 174, 275.
Andreev, A. S. and Kosovichev, A. G.: 1996, Space Sci. Rev., in press.
Beckers, J. M.: 1972, Ann. Rev. Astron. Astrophys. 10, 73.
Bekefi, G., Feld, B. T., Parmentola, J., and Tsipis, K.: 1980, Nature 284, 219.
Bennett, W. H.: 1934, Phys. Rev. 45, 890.
Bethe, H. A. and Ashkin, J.: 1953, in E. Segre (ed.), Experimental Nuclear Physics, Vol. 1.
Blanchard, C. H.: 1954, National Bureau of Standards Circular 527, 9.
Bocchialini, K., Koutchmy, S., and Vial, J. C.: 1994, Space Sci. Rev. 70, 57.
Braginskii, S. I.: 1965, Re. Plasma Phys. 1, 205.
Briggs, R. J., Clark, J., Fessenden, T., Lee, E., and Lauer, E.: 1977, Lawrence Livermore Laboratory Report, No. UCID-17516.
Brueckner, G. E.: 1983, Astrophys. J. 272, 329.
Brueckner, G. E.: 1989, Solar Phys. 123, 41.
Brueckner, G. E. and Bartoe, J. D. F.: 1983, Astrophys. J. 272, 329.
Cambel, A. B.: 1963, Plasma Physics and Magnetofluidmechanics, McGraw-Hill, New York, Chapter 7.
Dere, K. R, Bartoe, J. D. F., and Brueckner, G. E.: 1989, Solar Phys. 123, 41.
Dudin, S. V., Zykov, A. V., and Farenik, V. I.: 1994, Rev. Sci. Instr. 65, 1451.
Dunn, R. B.: 1960, Thesis, Harvard University, Boston, Mass., U.S.A.
Dunn, R. B.: 1976, private communication.
Fearn, D. R., Roberts, P. H., and Soward, A. M.: 1988, in G. P. Galdi and B. Staughan (eds.), Convection, Stability and the Dynamo, Energy Stability and Convection, Longman, Harlow, Essex, UK, pp. 114 and 124.
Fernsler, R. F., Slinker, S. P., and Hubbard, R. F.: 1991, Phys. Fluids B3, 2696.
Haerendel, G.: 1992, Nature 360, 241.
Foukal, P.: 1990, Solar Astrophysics, John Wiley, New York.
Foukal, P.: 1992, Nature 358, 285.
Giovanelli, R. G.: 1967, p. 353 in J. N. Xanthikis (ed.), Solar Physics, Interscience, London.
Heristchi, D. and Mouradian, Z.: 1992, Solar Phys. 142, 21.
Ingraham, R. L.: 1995, Phys. Scripta 52, 60.
Kolm, H. H. and Mawardi, O. K.: 1961, J. Appl. Phys. 32, 1296.
Koutchmy, S. and Lorrain, R: 1992, in J. C. Vial (ed.), Recent Observatioss on Solar Spicules; A Preliminary Model, Summer/CDS meeting, Orsay, France. Institut d'Astrophysique Spatiale, Université de Paris XI, 91405 Orsay, France.
Koutchmy, S. and Loucif, M. L.: 1991, in P. Ulmschneider, E. R. Priest, and R. Rosner (eds.), ‘Properties of Impulsive Events in a Polar Coronal Hole’, in Mechanisms of Chromospheric and Coronal Heating, Springer-Verlag, Berlin.
Koutchmy, S. and Stellmacher, G.: 1976, Solar Phys. 49, 253.
Larmor, J.: 1919, Rept. Brit. Assoc., p. 159.
Lawson, J. D.: 1977, The Physics of Charped-Particle Beams, Clarendon, Oxford.
Lindsey, C., Jefferies, J. T., Clark, T. A. et al.: 1992, Nature 358, 308.
Lorrain, P.: 1990, Eur. J. Phys. 11, 94.
Lorrain, P.: 1991, IEEE Trans. Plasma Sci. 19, 862.
Lorrain, P.: 1995, Phys. Scripta 52, 349.
Lorrain, P. and Koutchmy, S.: 1993, Astron. Astrophys. 269, 518.
Lorrain, P. and Salingaros, N.: 1993, Am. J. Phys. 61, 811.
Lorrain, P., Corson, D. R., and Lorrain, F.: 1988, Electromagnetic Fields and Waves, 3rd ed., Freeman, New York.
Miller, R. B.: 1982, An Introduction to the Physics of Intense Charged Particle Beams, Plenum Press, London.
Meyer, J. P.: 1991, Adv. Space Res. 11, 269.
Niu. K.: 1994, A.I.P. Conf. Proc. 318, 421.
Prelec, K. (ed.): 1977, Proc. Symp. Production and Neutralization of Negative Hydrogen Ions and Beams, Brookhaven National Laboratory Report, No. BNL 50727 UC-34a.
Secchi, P. A.: 1877, Le Soleil, Gauthier-Villars, Paris.
Shercliff, J. A.: 1965, Textbook of Magnetohydrodynamics, Pergamon, London, p. 48.
Sturrock, P. (ed.): 1986, Physics of the Sun, Vol. II: The Solar Atmosphere, D. Reidel Publ. Co., Dordrecht, Holland.
Suematsu, Y., Wang, H., and Zirin, H.: 1995, Astrophys. J., in press.
Sweetman, D. R.: 1971, Culham Laboratory Report R112, Abingdon, U.K.
Vernazza, J. E., Avrett, E. H., and Loeser, R.: 1976, Astrophys. J. Suppl. Series 30, 1.
Vernazza, J. E., Avrett, E. H., and Loeser, R.: 1981, Astrophys. J. Suppl. Series 45, 635.
Veselovsky, I. S., Třísková, L., and Koutchmy, S.: 1994, Solar Phys. 153, 237.
Williams, E. J.: 1939, Proc. Roy. Soc. A169, 542.
Zirin, H.: 1988, Astrophysics of the Sun, Cambridge University Press, Cambridge.
Zirker, J. B. and Koutchmy, S.: 1991, Solar Phys. 131, 107.
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Lorrain, P., Koutchmy, S. Two dynamical models for solar spicules. Sol Phys 165, 115–137 (1996). https://doi.org/10.1007/BF00149093
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DOI: https://doi.org/10.1007/BF00149093