Development of a real-time beam profile monitor for GeV photons and its application in accelerator facilities

IF 1.5 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2024-10-23 DOI:10.1016/j.nima.2024.169992

R. Kino , S. Nagao , T. Akiyama , H. Fujioka , T. Fujiwara , T. Ishige , K. Itabashi , S. Kajikawa , M. Kaneta , M. Mizuno , S.N. Nakamura , K. Nishi , K. Nishida , K. Okuyama , F. Oura , K. Tachibana , Y. Toyama , D. Watanabe

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引用次数: 0

Abstract

A real-time beam profile monitoring system is proposed for GeV photon beams at the BM4 beamline of the Mikamine site, Research Center for Accelerator and Radioisotope Science (RARiS; previously known as ELPH) at Tohoku University. This monitoring system enhances the capability to monitor the entire beamline by incorporating newly developed beam profile monitors (BPMs) for upstream and midstream sections, in addition to the existing high-speed BPM used for downstream monitoring. This paper reports on the detection mechanisms of the newly developed BPMs and the actual measurement results obtained using the integrated beam monitoring system. The new BPMs are composed of plastic scintillation fibers and silicon photomultipliers, enabling high-precision, real-time measurements. Data acquisition utilizes streaming TDC, a firmware commonly employed in the J-PARC Hadron-hall, allowing real-time detection of high-intensity photon beams with count rates reaching several tens of MHz. With sufficient statistical data, the BPM achieved a 1-s beam-profiling accuracy of 10

μ m

. The proposed BPM system serves as a valuable resource for future physics experiments at the BM4 photon beamline and will significantly contribute to ongoing accelerator research endeavors.

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开发 GeV 光子实时光束轮廓监测器及其在加速器设施中的应用

针对东北大学加速器和放射性同位素科学研究中心（RARiS，以前称为 ELPH）三峰基地 BM4 光束线的 GeV 光子束，提出了一种实时光束剖面监测系统。除了用于下游监测的现有高速光束轮廓监测器（BPM）之外，该监测系统还为上游和中游部分安装了新开发的光束轮廓监测器（BPM），从而增强了对整个光束线的监测能力。本文报告了新开发的 BPM 的检测机制以及使用集成光束监测系统获得的实际测量结果。新的 BPM 由塑料闪烁光纤和硅光电倍增管组成，能够进行高精度的实时测量。数据采集采用流式 TDC，这是 J-PARC Hadron-hall 常用的固件，可以实时检测计数率高达几十兆赫的高强度光子束。有了足够的统计数据，BPM 实现了 10 μm 的 1 秒光束轮廓精度。拟议的 BPM 系统将成为 BM4 光子光束线未来物理实验的宝贵资源，并将为正在进行的加速器研究工作做出重大贡献。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.