1
|
Tomkus V, Girdauskas V, Dudutis J, Gečys P, Stankevič V, Račiukaitis G, Gallardo González I, Guénot D, Svensson JB, Persson A, Lundh O. Laser wakefield accelerated electron beams and betatron radiation from multijet gas targets. Sci Rep 2020; 10:16807. [PMID: 33033319 PMCID: PMC7545103 DOI: 10.1038/s41598-020-73805-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 09/17/2020] [Indexed: 11/10/2022] Open
Abstract
Laser Plasma Wakefield Accelerated (LWFA) electron beams and efficiency of betatron X-ray sources is studied using laser micromachined supersonic gas jet nozzle arrays. Separate sections of the target are used for the injection, acceleration and enhancement of electron oscillation. In this report, we present the results of LWFA and X-ray generation using dynamic gas density grid built by shock-waves of colliding jets. The experiment was done with the 40 TW, 35 fs laser at the Lund Laser Centre. Electron energies of 30–150 MeV and 1.0 × 108–5.5 × 108 photons per shot of betatron radiation have been measured. The implementation of the betatron source with separate regions of LWFA and plasma density grid raised the efficiency of X-ray generation and increased the number of photons per shot by a factor of 2–3 relative to a single-jet gas target source.
Collapse
Affiliation(s)
- Vidmantas Tomkus
- Center for Physical Sciences and Technology, 02300, Vilnius, Lithuania.
| | - Valdas Girdauskas
- Center for Physical Sciences and Technology, 02300, Vilnius, Lithuania.,Vytautas Magnus University, 44248, Kaunas, Lithuania
| | - Juozas Dudutis
- Center for Physical Sciences and Technology, 02300, Vilnius, Lithuania
| | - Paulius Gečys
- Center for Physical Sciences and Technology, 02300, Vilnius, Lithuania
| | | | | | | | - Diego Guénot
- Department of Physics, Lund University, 221 00, Lund, Sweden
| | | | - Anders Persson
- Department of Physics, Lund University, 221 00, Lund, Sweden
| | - Olle Lundh
- Department of Physics, Lund University, 221 00, Lund, Sweden
| |
Collapse
|
2
|
Zhang G, Chen M, Yang X, Liu F, Weng S, Ma Y, Zou D, Yu T, Shao F, Sheng Z. Betatron radiation polarization control by using an off-axis ionization injection in a laser wakefield acceleration. OPTICS EXPRESS 2020; 28:29927-29936. [PMID: 33114881 DOI: 10.1364/oe.404723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
Tunable X-ray sources from a laser-driven wakefield have wide applications. However, due to the difficulty of electron dynamics control, currently the tunability of laser wakefield-based X-ray sources is still difficult. By using three-dimensional particle-in-cell simulations, we propose a scheme to realize controllable electron dynamics and X-ray radiation. In the scheme, a long wavelength drive pulse excites a plasma wake and an off-axis laser pulse with a short wavelength co-propagates with the drive pulse and ionizes the K-shell electrons of the background high-Z gas. The electrons can be injected in the wakefield with controllable transverse positions and residual momenta. These injected electrons experience controllable oscillations in the wake, leading to tunable radiations both in intensity and polarization.
Collapse
|