Reconstructing phase space of injection beam based on the measurement of accumulated beam: A novel tomography algorithm and its applications

IF 1.5 3区物理与天体物理 Q3 PHYSICS, NUCLEAR

Physical Review Accelerators and Beams Pub Date : 2024-05-21 DOI:10.1103/physrevaccelbeams.27.052804

H. Y. Liu, S. Y. Xu, M. T. Li, Y. S. Yuan, L. S. Huang, X. Y. Feng, S. Wang

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引用次数: 0

Abstract

The measurement of phase space has always been an important topic in the field of accelerator physics, playing an indispensable role in understanding the beam dynamics. The phase space distribution of the injected beam is crucial for optimizing the multiturn accumulation injection process in synchrotrons. However, directly and accurately measuring the phase space distribution is a challenging task. In this study, we propose an innovative tomographic algorithm based on the measurement data of the accumulated beam profile obtained from the wall current monitor (WCM) in a synchrotron, to reconstruct the longitudinal phase space of the injected beam. Simulations were conducted for various initial distribution scenarios, and the results showed that this algorithm can achieve a difference of about 4% in the rms momentum spread between the initial and reconstructed phase space distribution of the injected beam. This algorithm has been applied to the China Spallation Neutron Source and successfully measured the momentum spread of the injected beam. Machine studies considering the phase error of the injected beam showed a high consistency between the reconstructed beam profiles and the measurement results from the WCM on Rapid Cycling Synchrotron. The research results demonstrate that this algorithm can be an effective approach for measuring the momentum distribution of the injected beam in a synchrotron. Furthermore, this method also has the potential to be extended to reconstruct the transverse phase space of the injected beam. Published by the American Physical Society 2024

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基于累积光束的测量重建注入光束的相空间：新型层析成像算法及其应用

相空间测量一直是加速器物理领域的重要课题，在理解光束动力学方面发挥着不可或缺的作用。注入光束的相空间分布对于优化同步加速器的多圈累积注入过程至关重要。然而，直接准确地测量相空间分布是一项具有挑战性的任务。在本研究中，我们提出了一种创新的层析成像算法，该算法基于同步加速器中壁电流监测器（WCM）获得的累积光束剖面测量数据，用于重建注入光束的纵向相空间。对各种初始分布情况进行了模拟，结果表明该算法可使注入光束的初始相空间分布与重建后的相空间分布之间的均方根动量散布相差约 4%。该算法已应用于中国溅射中子源，并成功测量了注入束的动量散布。考虑到注入光束相位误差的机器研究表明，重建的光束轮廓与快速循环同步加速器上WCM的测量结果高度一致。研究结果表明，该算法是测量同步加速器中注入光束动量分布的有效方法。此外，这种方法还有可能扩展到重建注入光束的横向相空间。美国物理学会出版 2024

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来源期刊

Physical Review Accelerators and Beams Physics and Astronomy-Surfaces and Interfaces

CiteScore

3.90

自引率

23.50%

发文量

158

审稿时长

23 weeks

期刊介绍： Physical Review Special Topics - Accelerators and Beams (PRST-AB) is a peer-reviewed, purely electronic journal, distributed without charge to readers and funded by sponsors from national and international laboratories and other partners. The articles are published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. It covers the full range of accelerator science and technology; subsystem and component technologies; beam dynamics; accelerator applications; and design, operation, and improvement of accelerators used in science and industry. This includes accelerators for high-energy and nuclear physics, synchrotron-radiation production, spallation neutron sources, medical therapy, and intense-beam applications.