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Three electron beams from a laser-plasma wakefield accelerator and the energy apportioning question
- Source :
- Scientific Reports, Sci. Rep., (2017) pp. 43910
- Publication Year :
- 2017
-
Abstract
- Laser-wakefield accelerators are compact devices capable of delivering ultra-short electron bunches with pC-level charge and MeV-GeV energy by exploiting the ultra-high electric fields arising from the interaction of intense laser pulses with plasma. We show experimentally and through numerical simulations that a high-energy electron beam is produced simultaneously with two stable lower-energy beams that are ejected in oblique and counter-propagating directions, typically carrying off 5–10% of the initial laser energy. A MeV, 10s nC oblique beam is ejected in a 30°–60° hollow cone, which is filled with more energetic electrons determined by the injection dynamics. A nC-level, 100s keV backward-directed beam is mainly produced at the leading edge of the plasma column. We discuss the apportioning of absorbed laser energy amongst the three beams. Knowledge of the distribution of laser energy and electron beam charge, which determine the overall efficiency, is important for various applications of laser-wakefield accelerators, including the development of staged high-energy accelerators.
- Subjects :
- Materials science
Electron
01 natural sciences
7. Clean energy
Article
010305 fluids & plasmas
law.invention
Optics
law
Electric field
0103 physical sciences
Coordination and Communication [13.1]
010306 general physics
QC
Multidisciplinary
business.industry
Plasma
Plasma acceleration
Laser
Accelerators and Storage Rings
Novel Acceleration Techniques (ANAC2) [13]
Cathode ray
Physics::Accelerator Physics
Laser beam quality
business
Beam (structure)
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Database :
- OpenAIRE
- Journal :
- Scientific Reports, Sci. Rep., (2017) pp. 43910
- Accession number :
- edsair.doi.dedup.....b83b3e7b62850c92219ccf6036afe6bf