Generation of maximum photon flux at the optimum plasma density in the laser-driven betatron oscillation

Journal Article · Sat Jan 15 04:00:00 EST 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3531697· OSTI ID:21532196

Yoo, Seung Hoon; Kim, Jaehoon; Kim, Jong Uk ^[1]; Seo, Ju Tae; Hahn, Sang June ^[2]

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1. Korea Electrotechnology Research Institute, Ansan 1701-19 (Korea, Republic of)
2. Department of Physics, Chung-Ang University, Seoul 156-756 (Korea, Republic of)

The plasma density effect on x-ray characteristics from betatron oscillation in a laser wakefield accelerator was studied via two-dimensional particle-in-cell simulations. Inside an ion cavity, accelerated electrons with betatron oscillatory motion produce synchrotron radiation. As the plasma density increases, both bunch charge and betatron oscillation amplitude increase in the laser unmodulated regime and decrease again in the laser modulated regime. The multicavitation and weaker field from the laser modulation result in a smaller bunch charge and a decrease in oscillation amplitude in the modulated regime. The photon flux and critical energy in the wiggler regime, where the ion cavity acts as a wiggler, can be optimized and controlled through plasma density. In this work, the mechanism of the optimum ratio of laser pulse duration to plasma wavelength for maximum photon flux was investigated.

• OSTI ID: 21532196
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 18; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCELERATORS
BEAM DYNAMICS
BETATRON OSCILLATIONS
BOSONS
BREMSSTRAHLUNG
DYNAMICS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
IONIZING RADIATIONS
LINEAR ACCELERATORS
MASSLESS PARTICLES
MECHANICS
OSCILLATIONS
PHOTONS
PLASMA DENSITY
PLASMA SIMULATION
PLASMA WAVES
RADIATIONS
SIMULATION
SYNCHROTRON RADIATION
WAKEFIELD ACCELERATORS
X RADIATION