Betatron radiation from density tailored plasmas

Journal Article · Sun Jun 15 04:00:00 EDT 2008 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2918657· OSTI ID:21120456

Ta Phuoc, K; Rousse, A ^[1]; Esarey, E; Cormier-Michel, E; Leemans, W P ^[2]; Leurent, V; Geddes, C G. R.; Schroeder, C B ^[2]

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1. Laboratoire d'Optique Appliquee, ENSTA, CNRS UMR7639, Ecole Polytechnique, Chemin de la Huniere, 91761 Palaiseau (France)
2. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

In laser wakefield accelerators, electron motion is driven by intense forces that depend on the plasma density. Transverse oscillations in the accelerated electron orbits produce betatron radiation. The electron motion and the resulting betatron radiation spectrum can therefore be controlled by shaping the plasma density along the orbit of the electrons. Here, a method based on the use of a plasma with a longitudinal density variation (density depression or step) is proposed to increase the transverse oscillation amplitude and the energy of the electrons accelerated in a wakefield cavity. For fixed laser parameters, by appropriately tailoring the plasma profile, the betatron radiation emitted by these electrons is significantly increased in both flux and energy.

• OSTI ID: 21120456
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 15; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
BETATRONS
DENSITY
ELECTRONS
LASERS
ORBITS
PLASMA
PLASMA BETATRONS
PLASMA DENSITY
PLASMA GUNS
PLASMA RADIAL PROFILES
PLASMA WAVES
WAKEFIELD ACCELERATORS