Multiple quasi-monoenergetic electron beams from laser-wakefield acceleration with spatially structured laser pulse

Journal Article · Sat Aug 15 04:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4927584· OSTI ID:22490075

Ma, Y.; Li, M. H.; Li, Y. F.; Wang, J. G.; Tao, M. Z.; Han, Y. J.; Zhao, J. R.; Huang, K.; Yan, W. C.; Ma, J. L.; Li, Y. T. ^[1]; Li, D. Z. ^[2]; Chen, Z. Y. ^[3]; Sheng, Z. M. ^[4]; Zhang, J. ^[4]

---

1. Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100080 (China)
2. Institute of High Energy Physics, CAS, Beijing 100049 (China)
3. Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan 621999 (China)
4. Department of Physics and Astronomy and IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240 (China)

By adjusting the focus geometry of a spatially structured laser pulse, single, double, and treble quasi-monoenergetic electron beams were generated, respectively, in laser-wakefield acceleration. Single electron beam was produced as focusing the laser pulse to a single spot. While focusing the laser pulse to two spots that are approximately equal in energy and size and intense enough to form their own filaments, two electron beams were produced. Moreover, with a proper distance between those two focal spots, three electron beams emerged with a certain probability owing to the superposition of the diffractions of those two spots. The energy spectra of the multiple electron beams are quasi-monoenergetic, which are different from that of the large energy spread beams produced due to the longitudinal multiple-injection in the single bubble.

• OSTI ID: 22490075
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 22; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCELERATION
BEAM INJECTION
BUBBLES
ELECTRON BEAMS
ENERGY SPECTRA
FILAMENTS
FOCUSING
LASER RADIATION
PULSES
WAKEFIELD ACCELERATORS