Effects of the imposed magnetic field on the production and transport of relativistic electron beams
- Institute of Applied Physics and Computational Mathematics, Beijing 100094 (China)
The effects of the imposed uniform magnetic field, ranging from 1 MG up to 50 MG, on the production and transport of relativistic electron beams (REBs) in overdense plasmas irradiated by ultraintense laser pulse are investigated with two-dimensional particle-in-cell numerical simulations. This study gives clear evidence that the imposed magnetic field is capable of effectively confining the relativistic electrons in space even when the source is highly divergent since it forces the electrons moving helically. In comparison, the spontaneous magnetic fields, generated by the helically moving electrons interplaying with the current filamentation instability, are dominant in scattering the relativistic electrons. As the imposed magnetic field was increased from 1 MG to 50 MG, overall coupling from laser to the relativistic electrons which have the potential to heat the compressed core in fast ignition was found to increase from 6.9% to 21.3% while the divergence of the REB increases significantly from 64° to 90°. The simulations show that imposed magnetic field of the value of 3–30 MG could be more suitable to fast-ignition inertial fusion.
- OSTI ID:
- 22227954
- Journal Information:
- Physics of Plasmas, Vol. 20, Issue 7; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
43 PARTICLE ACCELERATORS
BEAM PRODUCTION
BEAM TRANSPORT
BEAM-PLASMA SYSTEMS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
ELECTRON BEAMS
ELECTRONS
ICF DEVICES
INERTIAL CONFINEMENT
INERTIAL FUSION DRIVERS
IRRADIATION
LASER-PRODUCED PLASMA
LASERS
MAGNETIC FIELDS
NUMERICAL ANALYSIS
PLASMA DENSITY
PLASMA PRODUCTION
PLASMA SIMULATION
RELATIVISTIC RANGE