Demonstration of tailored energy deposition in a laser proton accelerator

Open Access

Demonstration of tailored energy deposition in a laser proton accelerator

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, and X. Q. Yan

Phys. Rev. Accel. Beams 23, 121304 – Published 28 December 2020

Abstract

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.

Received 20 March 2020
Accepted 20 November 2020

DOI:https://doi.org/10.1103/PhysRevAccelBeams.23.121304

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Laser driven ion acceleration

Accelerators & Beams

Authors & Affiliations

J. G. Zhu ^1,2,‡, M. J. Wu^1,‡, K. Zhu^1,2, Y. X. Geng^1,2, Q. Liao¹, D. Y. Li¹, T. Yang¹, M. J. Easton ^1,2, C. C. Li¹, X. H. Xu¹, Y. R. Shou¹, J. Q. Yu¹, Z. Gong¹, Y. Y. Zhao^1,2, P. J. Wang ¹, D. H. Wang¹, L. Tao¹, C. E. Chen^1,2, W. J. Ma^1,2, H. Y. Lu^1,2, T. Tajima³, G. Mourou⁴, C. Lin^1,2,*, and X. Q. Yan^1,2,†

¹State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing, China, 100871
²Beijing Laser Acceleration Innovation Center, Beijing, China, 101407
³Department of Physics and Astronomy, UC Irvine, Irvine, California 92697, USA
⁴DER-IZEST, Ecole Polytechnique, 91128 Palaiseau Cedex, France

^*Corresponding author. lc0812@pku.edu.cn
^†Corresponding author. x.yan@pku.edu.cn
^‡These authors are equally contributed to this work.

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Issue

Vol. 23, Iss. 12 — December 2020

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Physical Review Accelerators and Beams