Volume 125, Number 6, March 2019
|Number of page(s)||6|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||02 May 2019|
Twisted Volkov states in a plasma
1 IPFN, Instituto Superior Técnico, Universidade de Lisboa - Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
2 Instituto de Física, Universidade Federal Fluminense - 24210-340 Niterói, RJ, Brazil
Received: 15 February 2019
Accepted: 21 March 2019
This work considers quantum electron states in the field of twisted waves in a plasma. We consider electromagnetic and electrostatic waves. They can be associated with intense laser pulses carrying orbital angular momentum, and to the resulting twisted wakefields. Klein-Gordon and Dirac equations are considered. We show that twisted Volkov states of electrons in electromagnetic and electrostatic waves in a plasma can be excited, and discuss their main properties. These results support the idea that acceleration of helical electron beams in plasmas is possible.
PACS: 52.38.Kd – Laser-plasma acceleration of electrons and ions / 41.75.Jv – Laser-driven acceleration / 03.65.Pm – Relativistic wave equations
© EPLA, 2019
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