Control of quasi-monoenergetic electron beams from laser-plasma accelerators with adjustable shock density profile
| Autor: | Tsai, HE, Swanson, KK, Barber, SK, Lehe, R, Mao, HS, Mittelberger, DE, Steinke, S, Nakamura, K, Van Tilborg, J, Schroeder, C, Esarey, E, Geddes, CGR, Leemans, W |
|---|---|
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Physics of Plasmas, vol 25, iss 4 Tsai, HE; Swanson, KK; Barber, SK; Lehe, R; Mao, HS; Mittelberger, DE; et al.(2018). Control of quasi-monoenergetic electron beams from laser-plasma accelerators with adjustable shock density profile. Physics of Plasmas, 25(4). doi: 10.1063/1.5023694. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/7qk2856p |
| DOI: | 10.1063/1.5023694. |
| Popis: | © 2018 Author(s). The injection physics in a shock-induced density down-ramp injector was characterized, demonstrating precise control of a laser-plasma accelerator (LPA). Using a jet-blade assembly, experiments systematically varied the shock injector profile, including shock angle, shock position, up-ramp width, and acceleration length. Our work demonstrates that beam energy, energy spread, and pointing can be controlled by adjusting these parameters. As a result, an electron beam that was highly tunable from 25 to 300 MeV with 8% energy spread (ΔEFWHM/E), 1.5 mrad divergence, and 0.35 mrad pointing fluctuation was produced. Particle-in-cell simulation characterized how variation in the shock angle and up-ramp width impacted the injection process. This highly controllable LPA represents a suitable, compact electron beam source for LPA applications such as Thomson sources and free-electron lasers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|