Collective refraction of a beam of electrons at a plasma-gas interface

Physical Review Special Topics - Accelerators and Beams

Volumn 4, Issue 9, 2001, Pages 14-16

  Muggli, P ^a   Lee, S ^a   Katsouleas, T ^a   Assmann, R ^b   Decker, F J ^b   Hogan, M J ^b   Iverson, R ^b   Raimondi, P ^b   Siemann, R H ^b   Walz, D ^b   Blue, B ^c   Clayton, C E ^c   Dodd, E ^c   Fonseca, R A ^c   Hemker, R ^c   Joshi, C ^c   Marsh, K A ^c   Mori, W B ^c   Wang, S ^c  

^a UNIVERSITY OF SOUTHERN CALIFORNIA   (United States)

^b SLAC NATIONAL ACCELERATOR LABORATORY   (United States)

^c UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 18144385806     PISSN: 10984402     EISSN: 10984402     Source Type: Journal    
DOI: 10.1103/PhysRevSTAB.4.091301     Document Type: Article

References (12)

1. G. Raffelt, Stars as Laboratories for Fundamental Physics (University of Chicago Press, Chicago, 1996), p. 199.
2. G. Joos, in Theoretical Physics (Hafner, New York, 1959), 2nd ed., p. 687.
3. D. Whittum, A. Sessler, and J. Dawson, Phys. Rev. Lett. 64, 2511 (1990).
4. J. J. Su, T. Katsouleas, J. M. Dawson, and R. Fedele, Phys. Rev. A 41, 3321 (1990); J. J. Su, T. Katsouleas, J. M. Dawson, and P. Chen, Part. Accel. 20, 171 (1987).
5. J. J. Su, T. Katsouleas, J. M. Dawson, and R. Fedele, Phys. Rev. A 41, 3321 (1990); J. J. Su, T. Katsouleas, J. M. Dawson, and P. Chen, Part. Accel. 20, 171 (1987).
6. The refraction of the particle beam considered here is quite different from other more familiar bending mechanisms for particle beams, for example, the bending of a beam by a magnetic field. Unlike the magnetic case, the bending here is a boundary effect. It is caused by a field free (initially) passive medium, and in this sense is analogous to optical refraction at a dielectric boundary.
7. S. Lee, T. Katsouleas, R. Hemker, and W. B. Mori, Phys. Rev. E 61, 7014 (2000); R. Hemker, W. B. Mori, S. Lee, and T. Katsouleas, Phys. Rev. ST Accel. Beams 3, 061301 (2000).
8. S. Lee, T. Katsouleas, R. Hemker, and W. B. Mori, Phys. Rev. E 61, 7014 (2000); R. Hemker, W. B. Mori, S. Lee, and T. Katsouleas, Phys. Rev. ST Accel. Beams 3, 061301 (2000).
9. When the beam center is near the boundary but still inside the plasma, some plasma electrons (the ones above the beam axis) are expelled from the plasma. These electrons are attracted back to the ion column after the passage of the beam. Once the beam crosses the boundary, all plasma electrons ahead of the beam will be blown inward and the simple physical description in the text applies.
10. D. Whittum, Phys. Plasmas 4, 1154 (1997); The fields surrounding an axial slice of a relativistic beam depend only on the currents and charge in the same slice. This follows from developing the wave equation from Ampere's and Faraday's laws and noting that, for wakelike solutions and beams at speed near c, d/dz - (1/c)d/dt = 0. Thus fields at a slice can be found by assuming the slice to be an infinite cylinder.
11. M. J. Hogan et al., Phys. Plasmas 7, 224 (2000).
12. R. Hemker et al., in Proceedings of the 1999 Particle Accelerator Conference, New York (IEEE, Piscataway, NJ, 1999), p. 3672.