Ring-shaped electron beams from laser-wakefield accelerator

Petr Valenta; Gabriele M. Grittani; Carlo M. Lazzarini; Ondrej Klimo; Sergei V. Bulanov

doi:10.1117/12.2589222

18 April 2021 Ring-shaped electron beams from laser-wakefield accelerator

Petr Valenta, Gabriele M. Grittani, Carlo M. Lazzarini, Ondrej Klimo, Sergei V. Bulanov

Proceedings Volume 11779, Laser Acceleration of Electrons, Protons, and Ions VI; 1177909 (2021) https://doi.org/10.1117/12.2589222
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

Using analytical methods and computer simulations, we investigate physical processes which lead to the formation of ring-shaped electromagnetic and electron structures in laser-plasma interaction. We observe that as the intense laser pulse excites a nonlinear Langmuir wave in an underdense plasmas, a significant portion of the pulse is refracted outwards the propagation direction due to the interactions with thin, high-density electron walls surrounding the wave cavities. Because of the radial symmetry, the refracted light forms a distinct electromagnetic ring that encircles the driver pulse. The efficiency of the energy transfer to the electromagnetic ring is relatively high, so that the ring can generate its own Langmuir wave and trigger the electron self-injection, which results in a ring-shaped beam of high-energy electrons. The properties of the ring-shaped electromagnetic and electron beams depend on the parameters of the Langmuir wave cavity walls, thus they can be controlled by tuning the parameters of the laser and plasma. The ring structures could be applied as a drivers for acceleration of positively charged particles, or as a diagnostic to determine regimes and the overall efficiency of the laser-wakefield accelerator.

Conference Presentation

Citation Download Citation

Petr Valenta, Gabriele M. Grittani, Carlo M. Lazzarini, Ondrej Klimo, and Sergei V. Bulanov "Ring-shaped electron beams from laser-wakefield accelerator", Proc. SPIE 11779, Laser Acceleration of Electrons, Protons, and Ions VI, 1177909 (18 April 2021); https://doi.org/10.1117/12.2589222

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available