Boundary effects. Refraction of a particle beam

The refraction of light at an interface is familiar as a rainbow or the 'bending' of a pencil in a glass of water. Here we show that particles can also be refracted and even totally internally reflected, as evidenced by an electron beam of 28.5 × 109 electron volts being deflected by more...

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Published in:Nature (London) 2001-05, Vol.411 (6833), p.43-43
Main Authors: Muggli, P, Lee, S, Katsouleas, T, Assmann, R, Decker, F J, Hogan, M J, Iverson, R, Raimondi, P, Siemann, R H, Walz, D, Blue, B, Clayton, C E, Dodd, E, Fonseca, R A, Hemker, R, Joshi, C, Marsh, K A, Mori, W B, Wang, S
Format: Article
Language:English
Subjects:
Beams (radiation)
Bending
Boundaries
DNA methylation
Electron beams
Electrons
Fiber optics
Optical fibers
Optics
Pencils
Plasma
Refraction
Simulation
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container_end_page 43
container_issue 6833
container_start_page 43
container_title Nature (London)
container_volume 411
creator Muggli, P
Lee, S
Katsouleas, T
Assmann, R
Decker, F J
Hogan, M J
Iverson, R
Raimondi, P
Siemann, R H
Walz, D
Blue, B
Clayton, C E
Dodd, E
Fonseca, R A
Hemker, R
Joshi, C
Marsh, K A
Mori, W B
Wang, S
description The refraction of light at an interface is familiar as a rainbow or the 'bending' of a pencil in a glass of water. Here we show that particles can also be refracted and even totally internally reflected, as evidenced by an electron beam of 28.5 × 109 electron volts being deflected by more than a milli-radian upon exiting a passive boundary between a plasma and a gas -- the electron beam is bent away from the normal to the interface, just like light leaving a medium of higher refractive index. This phenomenon could lead to the replacement of magnetic kickers by fast optical kickers in particle accelerators, for example, or to compact magnet-less storage rings in which beams are guided by plasma fibre optics.
doi_str_mv 10.1038/35075144
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ispartof Nature (London), 2001-05, Vol.411 (6833), p.43-43
issn 0028-0836
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subjects Beams (radiation)
Bending
Boundaries
DNA methylation
Electron beams
Electrons
Fiber optics
Optical fibers
Optics
Pencils
Plasma
Refraction
Simulation
title Boundary effects. Refraction of a particle beam
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