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Betatron x-ray generation from electrons accelerated in a plasma cavity in the presence of laser fields
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10.1063/1.3237089
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Affiliations:
1 Center for Ultrafast Optical Science, The University of Michigan, Ann Arbor, Michigan 48109, USA
Phys. Plasmas 16, 103103 (2009)
/content/aip/journal/pop/16/10/10.1063/1.3237089
http://aip.metastore.ingenta.com/content/aip/journal/pop/16/10/10.1063/1.3237089
View: Figures

## Figures

FIG. 1.

Electron number density (image) and electrostatic potential, (white contours), normalized to from a two-dimensional particle-in-cell simulation using the code OSIRIS (Ref. 27). Data are taken at a time into the simulation, with initial conditions , , and .

FIG. 2.

Schematic of the coordinate system for collecting radiation. is the observation direction.

FIG. 3.

The Lorentz factor as a function of time of a single electron accelerated in a plasma bubble with normalized potential , radius , and initial transverse momenta , .

FIG. 4.

The radiated spectral intensity, of a single electron accelerated in a plasma bubble with normalized potential , radius , and initial transverse momenta , and displacements , .

FIG. 5.

The radiated spectral intensity, of a single electron accelerated in a plasma bubble with normalized potential , radius , with , and various initial transverse momenta: (a) , , perpendicular polarization. (b) , , parallel polarization. (c) , , perpendicular polarization. (d) , , parallel polarization. (e) , , perpendicular polarization. (f) , , parallel polarization.

FIG. 6.

The radiated spectral intensity, of a single electron accelerated in a plasma bubble with normalized potential , radius with , and various initial transverse momenta: (a) , , parallel polarization. (b) , , parallel polarization. (c) , , parallel polarization. (The perpendicular component is exactly zero in all cases.)

FIG. 7.

The radiated spectral intensity, of a single electron accelerated in a plasma bubble with normalized potential , radius , and initial transverse displacements of , . The bunch interacted with the copropagating laser with a normalized average vector potential of , group velocity of , linear polarization, and various phase velocities and momenta: (a) , , , , perpendicular polarization. (b) , , , , parallel polarization. (c) , , , , perpendicular polarization. (d) , , , , parallel polarization. (e) , , , , perpendicular polarization. (f) , , , , parallel polarization.

FIG. 8.

Trajectory of a single electron accelerated in a plasma bubble with normalized potential , radius , initial transverse momenta , interacting with a laser pulse with polarized in the direction.

FIG. 9.

Starting positions of 1000 particles, superimposed on an image of the wake potential and a contour plot of laser intensity envelope. The spatial scales are in units of .

FIG. 10.

The total radiated energy from 1000 electrons accelerated in a plasma bubble with normalized potential , radius as a function of for the laser pulse.

FIG. 11.

The radiated spectral intensity, , due to 1000 macroparticles, representing , accelerated in a plasma bubble with normalized potential , radius . The initial displacements of the particles, , , were distributed with a Gaussian probability in a distribution function with widths at of transverse to propagation and in the direction of propagation. The initial transverse momenta of the macroparticles were also assigned with a Gaussian probability, with a width of . The bunch interacted with the copropagating laser with a group velocity of , linear polarization, and phase velocity : (a) , perpendicular polarization, (b) , parallel polarization, (b) , perpendicular polarization, (c) , parallel polarization, (d) , perpendicular polarization, and (e) , parallel polarization.

FIG. 12.

The angular distribution of radiation emitted (a) with no laser present, (b) perpendicular to laser polarization, and (c) parallel to laser polarization corresponding to images (c)–(f) in Fig. 11. The inset graph shows the same distributions but normalized to their peak values, with the same color coding.

/content/aip/journal/pop/16/10/10.1063/1.3237089
2009-10-09
2014-04-18

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