[Table of Contents]

Plasma and Fusion Research

Volume 2, 049 (2007)

Letters

Effects of Relativistic Thermal Velocity Spread of Beam on Electromagnetic Instabilities in Fast Ignition
Peiyong YE and Katsunobu NISHIHARA
Institute of Laser Engineering, Osaka University
(Received 1 October 2007 / Accepted 1 November 2007 / Published 5 December 2007)

Abstract

We investigate the linear instability of electromagnetic modes caused by the interaction of a relativistic electron beam with a dense plasma, taking into account the relativistic thermal spread of the beam. To obtain a linear dispersion relation, the relativistic factor γ of the beam is expanded within the first order of the beam thermal spread. We show that growth rate becomes large when the relativistic thermal spread of the beam is taken into account. In addition, we discuss the effects of the relativistic beam thermal spread on growth rate and the wave number vector that yields the maximum growth.

Keywords

fast ignition, beam-plasma system, electromagnetic instability, relativistic effect, energy transport

DOI: 10.1585/pfr.2.049

Full Text

PDF format (386Kbytes) PDF Download

References

  • [1] M. Tabak et al., Phys. Plasma 1, 1626 (1994).
  • [2] L.O. Silva, R.A. Fonseca, J.W. Tonge, W.B. Mori and J.M. Dawson, Phys. Plasma 9, 2458 (2001).
  • [3] A. Bret, M.-C. Firpo and C. Deutsch, Phys. Rev. E 70, 046401 (2004).
  • [4] A. Bret, M.-C. Firpo and C. Deutsch, Phys. Rev. E 72, 016403 (2005).
  • [5] E.S. Weibel, Phys. Rev. Lett. 2, 83 (1959).
  • [6] O. Buneman, Phys. Rev. 115, 503 (1959).
  • [7] M. Tatarakis et al., Phys. Rev. Lett. 90, 175001 (2003).
  • [8] Y. Danno, P. Ye and K. Nishihara, Annual Progress Report (ILE, Osaka Univ., 2007) p.123.

This paper may be cited as follows:

Peiyong YE and Katsunobu NISHIHARA, Plasma Fusion Res. 2, 049 (2007).