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Generation of high-energy ion bunches via laser-induced cavity pressure acceleration at ultra-high laser intensities

Published online by Cambridge University Press:  28 January 2014

S. Jabłoński ,
J. Badziak  and
P. Rączka
S. Jabłoński*
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
J. Badziak
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
P. Rączka
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
*
Address correspondence and reprint requests to: Sławomir Jabłoński, Institute of Plasma Physics and Laser Microfusion, 23 Hery Street, 01-497 Warsaw, Poland. E-mail: [email protected]
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Abstract

In this paper, a new method for efficient generation of high-energy ion bunches via laser-induced cavity pressure acceleration (LICPA) is examined using one-dimensional particle-in-cell code PIC1D. It is found that for high laser beam intensities of the order of 1022 W/cm2 and for circular light polarization, a substantial increase in parameters of the accelerated ions is obtained when the target is placed inside a special cavity, into which the laser beam is introduced by a small hole. As compared to the pure radiation pressure acceleration scheme, the LICPA scheme leads to an increase in ion energies and the laser-to-ions energy conversion efficiency while the width of the ion energy spectrum are similar for both the schemes. Such a tendency was observed for all carbon targets (from 2 µm to 0.2 µm thick) investigated in the paper. The results of PIC1D simulations agree very well with predictions of the suitably generalized light sail model.

Keywords

Acceleration of ionsLaser-induced cavity pressure accelerationParticle-in-cell simulationPlasma
Type
Research Article
Information
Laser and Particle Beams , Volume 32 , Issue 1 , March 2014 , pp. 129 - 135
Copyright
Copyright © Cambridge University Press 2014 

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