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Demonstration of tailored energy deposition in a laser proton accelerator
Physical Review Accelerators and Beams ( IF 1.7 ) Pub Date : 2020-12-28 , DOI: 10.1103/physrevaccelbeams.23.121304 J. G. Zhu , M. J. Wu , K. Zhu , Y. X. Geng , Q. Liao , D. Y. Li , T. Yang , M. J. Easton , C. C. Li , X. H. Xu , Y. R. Shou , J. Q. Yu , Z. Gong , Y. Y. Zhao , P. J. Wang , D. H. Wang , L. Tao , C. E. Chen , W. J. Ma , H. Y. Lu , T. Tajima , G. Mourou , C. Lin , X. Q. Yan
Physical Review Accelerators and Beams ( IF 1.7 ) Pub Date : 2020-12-28 , DOI: 10.1103/physrevaccelbeams.23.121304 J. G. Zhu , M. J. Wu , K. Zhu , Y. X. Geng , Q. Liao , D. Y. Li , T. Yang , M. J. Easton , C. C. Li , X. H. Xu , Y. R. Shou , J. Q. Yu , Z. Gong , Y. Y. Zhao , P. J. Wang , D. H. Wang , L. Tao , C. E. Chen , W. J. Ma , H. Y. Lu , T. Tajima , G. Mourou , C. Lin , X. Q. Yan
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In order to implement radiotherapy based on a laser accelerator, it is necessary to precisely control the spatial distribution and energy spectrum of the proton beams to meet the requirements of the radiation dose distribution in the three-dimensional biological target. A compact laser plasma accelerator has been built at Peking University, which can reliably generate and transport MeV-energy protons with a specified energy onto the irradiation platform. In this paper, we discuss several technologies for the accurate control of a laser-accelerated proton beam with large divergence angle and broad energy spread, including the determination of the beam source position with micron accuracy, a tuning algorithm for the transport line which we refer to as “matching-image-point two-dimensional energy analysis” to realize accurate energy selection, and the control of beam distribution uniformity. In the prototype experiment with low energy protons and 0.5-Hz irradiation rate, a tailored energy deposition is demonstrated, which shows the potential feasibility of future irradiation based on laser-accelerated proton beams.
更新日期：2020-12-28
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