Short electron bunches generated by perpendicularly crossing laser pulses

0509544 - ÚFP 2020 RIV GB eng J - Journal Article
Horný, Vojtěch - Petržílka, Václav - Krůs, Miroslav
Short electron bunches generated by perpendicularly crossing laser pulses.
Plasma Physics and Controlled Fusion. Roč. 61, č. 8 (2019), č. článku 085018. ISSN 0741-3335. E-ISSN 1361-6587
R&D Projects: GA MŠMT LQ1606; GA MŠMT(CZ) LD14089; GA MŠMT(CZ) CZ.02.1.01/0.0/0.0/16_013/0001552
Grant - others:Ga MŠk(CZ) LM2015070
Institutional support: RVO:61389021
Keywords : optical injection * laser wakefield acceleration * electron bunch * crossing pulses
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 2.829, year: 2019
Method of publishing: Limited access
https://iopscience.iop.org/article/10.1088/1361-6587/ab2728

Optical injection of electrons into a laser wakefield accelerator by colliding a strong drive laser pulse and an orthogonally propagating and perpendicularly polarized weaker injection pulse(-s) is investigated using 2D and 3D particle-in-cell simulations. Within this contribution, we will present recent results of improvement in the fundamental scheme with single injection pulse by its specific modifications. Low-intensity injection pulses can generate sub-femtosecond electron bunches. Introduction of a second injection pulse perpendicular to the plasma-wave-driving pulse leads to a decrease in emittance and increase in charge. Moreover, we suggest introducing the negatively chirped pulses to drive the accelerating plasma wave in the configurations with controlled injection. It is demonstrated that the negative chirp effectively suppresses the presence of the dark current which is generally difficult to control. Thus, it amends the electron bunch parameters considerably.
Permanent Link: http://hdl.handle.net/11104/0300264