Numerical Study of a Multi-stage Dielectric Laser-driven Accelerator

In order to overcome the limits of commonly used radiofrequency accelerators, it is highly desirable to reduce the unit cost and increase the maximum achievable accelerating gradient. Dielectric laser-driven accelerators (DLAs) based on grating structures have received considerable attention due to...

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Bibliographic Details
Published in:Physics procedia 2015, Vol.77, p.50-57
Main Authors: Wei, Yelong, Xia, Guoxing, Smith, Jonathan. D.A., Hanahoe, Kieran, Mete, Oznur, Jamison, Steve P., Welsch, Carsten P.
Format: Article
Language:English
Subjects:
compact radiation source
Dielectric laser-driven accelerator (DLA)
electron beam
high acceleration gradient
micro accelerators
multi-stage acceleration
relativistic particle beam
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Summary:In order to overcome the limits of commonly used radiofrequency accelerators, it is highly desirable to reduce the unit cost and increase the maximum achievable accelerating gradient. Dielectric laser-driven accelerators (DLAs) based on grating structures have received considerable attention due to maximum acceleration gradients of several GV/m and mature lithographic techniques for structure fabrication. This paper explores different spatial harmonics excited by an incident laser pulse and their interaction with the electron beam from the non-relativistic (25 keV) to the highly relativistic regime in double-grating silica structures. The achievable acceleration gradient for different spatial harmonics and the optimal compromise between maximum acceleration gradient and simplicity of structure fabrication are discussed. Finally, the suitability of a multi-stage DLA which would enable the acceleration of electrons from 25 keV to relativistic energies is discussed.
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2015.11.009