Laser wakefield electron acceleration for γ-ray radiography application

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2012,（6）
• 页码范围: 87-90
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201210.063501

摘要

An electron beam is obtained using laser wakefield electron accelerator,and converted into a γ-ray source after undergoing bremsstrahlung radiation in a dense material.A quasi-monoenergetic structure is observed when the length of the plasma channel was modified.The structure has a 58-MeV peak energy,15-mrad (full-width at half-maximum) divergence angle,and 340-pC charge.The γ-ray source generated by this high-quality electron beam is brighter and has higher spatial and temporal resolutions than other conventional sources.A γ-ray radiography demonstrational experiment is performed.Pictures of a ball with different layers made of different materials are taken.The results show a clear structure and density resolution.