Enhanced betatron radiation in strongly magnetized plasma

Journal Article · Fri Apr 15 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4947545· OSTI ID:22599155

Pan, K. Q. ^[1]; Cao, L. H. ^[1]; Liu, Z. J. ^[2]

---

1. Center for Applied Physics and Technology, Peking University, Beijing 100871 (China)
2. Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)

Betatron radiation in strongly magnetized plasma is investigated by two dimensional (2D) particle-in-cell (PIC) simulations. The results show that the betatron radiation in magnetized plasmas is strongly enhanced and is more collimated compared to that in unmagnetized plasma. Single particle model analysis shows that the frequency and the amplitude of the electrons's betatron oscillation are strongly influenced by the axial external magnetic field and the axial self-generated magnetic field. And the 2D PIC simulation shows that the axial magnetic field is actually induced by the external magnetic field and tends to increase the betatron frequency. By disturbing the perturbation of the plasma density in the laser-produced channel, the hosing instability is also suppressed, which results in a better angular distribution and a better symmetry of the betatron radiation.

• OSTI ID: 22599155
• Journal Information: Physics of Plasmas, Vol. 23, Issue 4; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
ANGULAR DISTRIBUTION
BETATRON OSCILLATIONS
BETATRONS
COMPARATIVE EVALUATIONS
ELECTRONS
HOSE INSTABILITY
LASERS
MAGNETIC FIELDS
PARTICLES
PERTURBATION THEORY
PLASMA DENSITY
SINGLE-PARTICLE MODEL
SYMMETRY
TWO-DIMENSIONAL CALCULATIONS