Angular streaking of betatron X-rays in a transverse density gradient laser-wakefield accelerator

Physics

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https://doi.org/10.1063/1.5054807
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Keywords

Betatrons, Electron beams, Plasma accelerators, Plasma density, Plasma simulation, Wavefronts, X ray spectrographs, Accelerated electron beam, Diagnostic techniques, Electron acceleration, Laser wakefield accelerators, Parabolic trajectories, Particle-in-cell simulations, Temporal evolution, Velocity difference, X rays

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Angular streaking of betatron X-rays in a transverse density gradient laser-wakefield accelerator. / Ma, Y.; Seipt, D.; Dann, S.J.D. et al.
In: Physics of Plasmas, Vol. 25, No. 11, 113105, 11.2018.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Bibtex

@article{75153f7286034328b719118e4c51bc9f,

title = "Angular streaking of betatron X-rays in a transverse density gradient laser-wakefield accelerator",

abstract = "In a plasma with a transverse density gradient, laser wavefront tilt develops gradually due to phase velocity differences in different plasma densities. The wavefront tilt leads to a parabolic trajectory of the plasma wakefield and hence the accelerated electron beam, which leads to an angular streaking of the emitted betatron radiation. In this way, the temporal evolution of the betatron X-ray spectra will be converted into angular {"}streak,{"} i.e., having a critical energy-angle correlation. An analytical model for the curved trajectory of a laser pulse in a transverse density gradient is presented. This gives the deflection angle of the electron beam and the betatron X-rays as a function of the plasma and laser parameters, and it was verified by particle-in-cell simulations. This angular streaking could be used as a single-shot diagnostic technique to reveal the temporal evolution of betatron X-ray spectra and hence the electron acceleration itself. {\textcopyright} 2018 Author(s).",

keywords = "Betatrons, Electron beams, Plasma accelerators, Plasma density, Plasma simulation, Wavefronts, X ray spectrographs, Accelerated electron beam, Diagnostic techniques, Electron acceleration, Laser wakefield accelerators, Parabolic trajectories, Particle-in-cell simulations, Temporal evolution, Velocity difference, X rays",

author = "Y. Ma and D. Seipt and S.J.D. Dann and M.J.V. Streeter and C.A.J. Palmer and L. Willingale and A.G.R. Thomas",

year = "2018",

month = nov,

doi = "10.1063/1.5054807",

language = "English",

volume = "25",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics Inc.",

number = "11",

}

RIS

TY - JOUR

T1 - Angular streaking of betatron X-rays in a transverse density gradient laser-wakefield accelerator

AU - Ma, Y.

AU - Seipt, D.

AU - Dann, S.J.D.

AU - Streeter, M.J.V.

AU - Palmer, C.A.J.

AU - Willingale, L.

AU - Thomas, A.G.R.

PY - 2018/11

Y1 - 2018/11

N2 - In a plasma with a transverse density gradient, laser wavefront tilt develops gradually due to phase velocity differences in different plasma densities. The wavefront tilt leads to a parabolic trajectory of the plasma wakefield and hence the accelerated electron beam, which leads to an angular streaking of the emitted betatron radiation. In this way, the temporal evolution of the betatron X-ray spectra will be converted into angular "streak," i.e., having a critical energy-angle correlation. An analytical model for the curved trajectory of a laser pulse in a transverse density gradient is presented. This gives the deflection angle of the electron beam and the betatron X-rays as a function of the plasma and laser parameters, and it was verified by particle-in-cell simulations. This angular streaking could be used as a single-shot diagnostic technique to reveal the temporal evolution of betatron X-ray spectra and hence the electron acceleration itself. © 2018 Author(s).

AB - In a plasma with a transverse density gradient, laser wavefront tilt develops gradually due to phase velocity differences in different plasma densities. The wavefront tilt leads to a parabolic trajectory of the plasma wakefield and hence the accelerated electron beam, which leads to an angular streaking of the emitted betatron radiation. In this way, the temporal evolution of the betatron X-ray spectra will be converted into angular "streak," i.e., having a critical energy-angle correlation. An analytical model for the curved trajectory of a laser pulse in a transverse density gradient is presented. This gives the deflection angle of the electron beam and the betatron X-rays as a function of the plasma and laser parameters, and it was verified by particle-in-cell simulations. This angular streaking could be used as a single-shot diagnostic technique to reveal the temporal evolution of betatron X-ray spectra and hence the electron acceleration itself. © 2018 Author(s).

KW - Betatrons

KW - Electron beams

KW - Plasma accelerators

KW - Plasma density

KW - Plasma simulation

KW - Wavefronts

KW - X ray spectrographs

KW - Accelerated electron beam

KW - Diagnostic techniques

KW - Electron acceleration

KW - Laser wakefield accelerators

KW - Parabolic trajectories

KW - Particle-in-cell simulations

KW - Temporal evolution

KW - Velocity difference

KW - X rays

U2 - 10.1063/1.5054807

DO - 10.1063/1.5054807

M3 - Journal article

VL - 25

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 11

M1 - 113105

ER -

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