Generation of 9 MeV γ-rays by all-laser-driven Compton scattering with second-harmonic laser light

Authors

• Cheng Liu, University of Nebraska-LincolnFollow
• Grigory V. Golovin, University of Nebraska-LincolnFollow
• Shouyuan Chen, University of Nebraska-LincolnFollow
• Jun Zhang, University of Nebraska-Lincoln
• Baozhen Zhao, University of Nebraska-LincolnFollow
• Daniel Haden, University of Nebraska-Lincoln
• Sudeep Banerjee, University of Nebraska-LincolnFollow
• Jack Silano, University of Nebraska-Lincoln
• Hugon Karwowski, University of Nebraska-Lincoln
• Donald Umstadter, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2014

Citation

OPTICS LETTERS / Vol. 39, No. 14 / July 15, 2014

Comments

Copyright 2014 Used by permission

Abstract

Gamma-ray photons with energy >9 MeV were produced when second-harmonic-generated laser light (3 eV) inverse-Compton-scattered from a counterpropagating relativistic (∼450 MeV) laser-wakefield-accelerated electron beam. Two laser pulses from the same laser system were used: one to accelerate electrons and one to scatter. Since the two pulses play very different roles in the γ-ray generation process, and thus have different requirements, a novel laser system was developed. It separately and independently optimized the optical properties of the two pulses. This approach also mitigated the deleterious effects on beam focusing that generally accompany nonlinear optics at high peak-power levels.