Universal scalings for laser acceleration of electrons in ion channels

Khudik, Vladimir; Arefiev, Alexey; Zhang, Xi; Shvets, Gennady

doi:10.1063/1.4964901

Universal scalings for laser acceleration of electrons in ion channels

Journal Article · Thu Oct 20 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4964901· OSTI ID:1465155

^[1]; ^[2]; Zhang, Xi ^[3]; Shvets, Gennady ^[4]

Univ. of Texas, Austin, TX (United States). Inst. for Fusion Studies and Dept. of Physics; Univ Texas Austin, Dept Phys, Austin, TX 78712 USA
Univ. of Texas, Austin, TX (United States). Center for High Energy Density Science
Univ. of Texas, Austin, TX (United States). Inst. for Fusion Studies and Dept. of Physics
Univ. of Texas, Austin, TX (United States). Inst. for Fusion Studies and Dept. of Physics; Cornell Univ., Ithaca, NY (United States). School of Applied and Engineering Physics

Here, we analytically investigate the acceleration of electrons undergoing betatron oscillations in an ion channel, driven by a laser beam propagating with superluminal (or luminal) phase velocity. The universal scalings for the maximum attainable electron energy are found for arbitrary laser and plasma parameters by deriving a set of dimensionless equations for paraxial ultra-relativistic electron motion. One of our analytic predictions is the emergence of forbidden zones in the electrons' phase space. For an individual electron, these give rise to a threshold-type dependence of the final energy gain on the laser intensity. The universal scalings are also generalized to the resonant laser interaction with the third harmonic of betatron motion and to the case when the laser beam is circularly polarized.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Texas, Austin, TX (United States)

Sponsoring Organization:: US Air Force Office of Scientific Research (AFOSR); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: FG02-04ER54742; NA0002008; NA0002723; SC0007889; SC0010622

OSTI ID:: 1465155

Alternate ID(s):: OSTI ID: 1329487

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 23; ISSN PHPAEN; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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