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Highly-collimated, high-charge and broadband MeV electron beams produced by magnetizing solids irradiated by high-intensity lasers
- Source :
- Matter and Radiation at Extremes, Matter and Radiation at Extremes, 2019, 4 (4), pp.044401. ⟨10.1063/1.5082330⟩, Matter and Radiation at Extremes, AIP Publishing 2019, 4 (4), pp.044401. ⟨10.1063/1.5082330⟩, Matter and Radiation at Extremes, Vol 4, Iss 4, Pp 044401-044401-8 (2019)
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
Abstract
- Laser irradiation of solid targets can drive short and high-charge relativistic electron bunches over micron-scale acceleration gradients. However, for a long time, this technique was not considered a viable means of electron acceleration due to the large intrinsic divergence (∼50° half-angle) of the electrons. Recently, a reduction in this divergence to 10°–20° half-angle has been obtained, using plasma-based magnetic fields or very high contrast laser pulses to extract the electrons into the vacuum. Here we show that we can further improve the electron beam collimation, down to ∼1.5° half-angle, of a high-charge (6 nC) beam, and in a highly reproducible manner, while using standard stand-alone 100 TW-class laser pulses. This is obtained by embedding the laser-target interaction in an external, large-scale (cm), homogeneous, extremely stable, and high-strength (20 T) magnetic field that is independent of the laser. With upcoming multi-PW, high repetition-rate lasers, this technique opens the door to achieving even higher charges (>100 nC).Laser irradiation of solid targets can drive short and high-charge relativistic electron bunches over micron-scale acceleration gradients. However, for a long time, this technique was not considered a viable means of electron acceleration due to the large intrinsic divergence (∼50° half-angle) of the electrons. Recently, a reduction in this divergence to 10°–20° half-angle has been obtained, using plasma-based magnetic fields or very high contrast laser pulses to extract the electrons into the vacuum. Here we show that we can further improve the electron beam collimation, down to ∼1.5° half-angle, of a high-charge (6 nC) beam, and in a highly reproducible manner, while using standard stand-alone 100 TW-class laser pulses. This is obtained by embedding the laser-target interaction in an external, large-scale (cm), homogeneous, extremely stable, and high-strength (20 T) magnetic field that is independent of t...
- Subjects :
- Nuclear and High Energy Physics
Materials science
Electron
Plasma
Laser
01 natural sciences
Atomic and Molecular Physics, and Optics
Collimated light
010305 fluids & plasmas
Magnetic field
law.invention
Acceleration
Nuclear Energy and Engineering
law
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]
0103 physical sciences
Cathode ray
lcsh:QC770-798
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
Electrical and Electronic Engineering
Atomic physics
010306 general physics
Beam (structure)
ComputingMilieux_MISCELLANEOUS
Subjects
Details
- Language :
- English
- ISSN :
- 2468080X
- Database :
- OpenAIRE
- Journal :
- Matter and Radiation at Extremes, Matter and Radiation at Extremes, 2019, 4 (4), pp.044401. ⟨10.1063/1.5082330⟩, Matter and Radiation at Extremes, AIP Publishing 2019, 4 (4), pp.044401. ⟨10.1063/1.5082330⟩, Matter and Radiation at Extremes, Vol 4, Iss 4, Pp 044401-044401-8 (2019)
- Accession number :
- edsair.doi.dedup.....ca83066e0e4f14f5c7805c720f53fa35