Electron-Beam Guiding and Phase-Mix Damping by a Laser-Ionized Channel

Martin, W.; Caporaso, G.J.; Fawley, W.M.; Prosnitz, D.; Cole, Andrew G.

doi:10.1103/physrevlett.54.685

Cited by 99 publications

(31 citation statements)

References 15 publications

(6 reference statements)

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“…The blow-out regime of the PWFA can be viewed as a short-bunch version of the ion-focused regime of electron beam propagation [16] - [19]. The "ion-focused regime" is a phrase traditionally applied to describe the propagation of long (compared to the plasma wavelength) electron beams in a plasma and, hence, these beams are subject to the electron-hose instability [20] - [23].…”

Section: Introductionmentioning

confidence: 99%

Synchrotron radiation from electron beams in plasma-focusing channels

et al. 2002

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Spontaneous radiation emitted from relativistic electrons undergoing betatron motion in a plasma focusing channel is analyzed and applications to plasma wakefield accelerator experiments and to the ion channel laser (ICL) are discussed. Important similarities and differences between a free electron laser (FEL) and an ICL are delineated. It is shown that the frequency of spontaneous radiation is a strong function of the betatron strength parameter a β , which plays a similar role to that of the wiggler strength parameter in a conventional FEL. For a β > ∼ 1, radiation is emitted in numerous harmonics.Furthermore, a β is proportional to the amplitude of the betatron orbit, which varies for every electron in the beam. The radiation spectrum emitted from an electron beam is calculated by averaging the single electron spectrum over the electron distribution. This leads to a frequency broadening of the radiation spectrum, which places serious limits on the possibility of realizing an ICL.03.65. 02.60.Cb, Typeset using REVT E X 1

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Section: Introductionmentioning

confidence: 99%

Synchrotron radiation from electron beams in plasma-focusing channels

et al. 2002

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“…All plasma electrons are expelled to large radii or to the beam pipe, and the remaining ion column provides the strong focusing required to transport intense beams over long distances. In this form IFR transport has been employed experimentally with great success to exceed the limitations of conventional magnetic focusing [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Flute instability of an ion-focused slab electron beam in a broad plasma

et al. 1992

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An intense relativistic electron beam with an elongated cross section, propagating in the ion-focused regime through a broad, uniform, unmagnetized plasma, is shown to suffer a transverse flute instability. This instability arises from the electrostatic coupling between the beam and the plasma electrons at the ion-channel edge. The instability is found to be absolute and the asymptotic growth of the flute amplitude is computed in the "frozen-field" approximation and the large skin-depth limit. The minimum growth length is shown to be much less than the betatron period, with the consequence that focusing is rendered ineffective. It is further shown that growth is much reduced when the beam propagates through a narrow channel where the ion density greatly exceeds that of the surrounding plasma. In this limit, a modest spread in betatron frequency produces rapid saturation. The effect of plasma electron collisions is also considered. Results of beam breakup simulations are noted.

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“…Although acceleration per se can lead to an increase in thermal emittancep an indicated in 55 Equations (12) and (13), the magnitude of such emittance growth is relatively small for a solenoidally focused, slowly rotating beam.…”

Section: 2mentioning

confidence: 99%

“…The favorable result in Equation (12) should not be interpreted to mean that sudden acceleration of solenoidally focused, slowly rotating beams may be performed with impunity. High gradient acceleration gaps often produce radial as well as axial electric fields, and these may produce envelope oscillations which phase mix to increase the thermal emittance.…”

Section: Analysis Of Emittance and Emittance Growth During Solenoidalmentioning

confidence: 99%