Ukrainian Journal of Physical Optics


2026 Volume 27, Issue 3


ISSN 1816-2002 (Online), ISSN 1609-1833 (Print)

WAKEFIELD ACCELERATION DRIVEN BY THE LASER PULSE WITH A STEEP FRONT IN VARIOUS PLASMA CHANNELS

Bondar, D. S., Maslov, V. I. and Onishchenko, I. N.

Author Information
*Bondar, D. S. ORCID logo SCOPUS logo, Maslov, V. I. SCOPUS logo, Onishchenko, I. N. ORCID logo SCOPUS logo,
National Science Center “Kharkiv Institute of Physics and Technology”, 1, Akademichna St., Kharkiv, 61108, Ukraine
*Corresponding author: bondar.ds@yahoo.com

ABSTRACT

Laser wakefield acceleration is an efficient method for generating and accelerating relativistic electron bunches. The parameters of these self-injected bunches depend on the laser and plasma parameters. In this paper, it is demonstrated that the formation of a self-injected bunch is sensitive to the profile of the driving laser pulse. The authors compared a steep-front pulse with a gradual-front pulse while keeping all other laser parameters identical. It is shown that a self-injected bunch forms for a steep front pulse, but no self-injection is observed for a gradual front pulse. The formation and subsequent wakefield acceleration of self-injected bunches were investigated in cylindrical and conical plasma channels for both homogeneous and longitudinally inhomogeneous plasma profiles. An increase in the energy of the self-injected bunch was achieved in the conical channel, as well as in the cylindrical channel with inhomogeneous plasma.

Keywords: laser, plasma channel, wakefield acceleration, inhomogeneous plasma, electron bunch

UDC: 533.9; 535.3; 519.6

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    Лазерне кільватерне прискорення є ефективним методом генерації та прискорення релятивістських електронних згустків. Параметри цих самоінжектованих згустків залежать від параметрів лазера та плазми. У цій роботі показано, що формування самоінжектованого згустку є чутливим до профілю лазерного імпульсу - драйвера. Автори порівняли імпульс із крутим переднім фронтом та імпульс із пологим переднім фронтом за всіх інших однакових параметрів лазера. Показано, що для імпульсу з крутим переднім фронтом формується самоінжектований згусток, тоді як для імпульсу з пологим переднім фронтом самоінжекція не спостерігається. Формування та подальше кільватерне прискорення самоінжектованих згустків досліджувалися в циліндричних і конічних плазмових каналах як для однорідних, так і для поздовжньо неоднорідних профілів плазми. Збільшення енергії самоінжектованого згустку було досягнуто в конічному каналі, а також у циліндричному каналі з неоднорідною плазмою.

    Ключові слова: лазер, плазмовий канал, кільватерне прискорення, неоднорідна плазма, електронний згусток

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