| Autor: |
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 |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Physical Review Accelerators and Beams, Vol 23, Iss 12, p 121304 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2469-9888 |
| DOI: |
10.1103/PhysRevAccelBeams.23.121304 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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