Volume 127, Number 5, September 2019
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||16 October 2019|
Analytical Thomson backscattering spectra and new scaling laws in laser and magnetic fields
1 Key Laboratory of Beam Technology of the Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University - Beijing 100875, China
2 Department of Physics, Beijing Normal University - Beijing 100875, China
3 Beijing Radiation Center - Beijing 100875, China
Received: 28 June 2019
Accepted: 3 September 2019
The analytical asymptotic expression of Thomson backscattering spectra in arbitrarily polarized laser and uniform magnetic fields is given. It is used to theoretically analyze the spectra structures and properties. The results of asymptotic expression and numerical calculations show good agreement in the large harmonic-order region. The scaling laws about laser intensity and electron initial axial momentum are obtained. Furthermore, the optimal harmonic order corresponding to the maximum radiation intensity can be found, then new scaling laws about this optimal harmonic order with laser intensity and resonance parameter are revealed.
PACS: 41.60.-m – Radiation by moving charges / 42.65.Ky – Frequency conversion; harmonic generation, including higher-order harmonic generation / 89.75.Da – Systems obeying scaling laws
© EPLA, 2019
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