Large radial shift experiments in RHIC and their implications for EIC design

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 : 2024-11-12 DOI:10.1016/j.nima.2024.170043

Guillaume Robert-Demolaize , Angelika Drees , Henry Lovelace III , Al Marusic , François Méot , Steve Peggs , Matthieu Valette

{"title":"Large radial shift experiments in RHIC and their implications for EIC design","authors":"Guillaume Robert-Demolaize , Angelika Drees , Henry Lovelace III , Al Marusic , François Méot , Steve Peggs , Matthieu Valette","doi":"10.1016/j.nima.2024.170043","DOIUrl":null,"url":null,"abstract":"<div><div>The Hadron Storage Ring (HSR) in the future Electron-Ion Collider (EIC) (EIC collaboration, 2020; Montag et al., 2022; Liu et al., 2022) must operate over a broad range of design circumferences. In 2018 preliminary beam studies on the circumference adjustment capabilities of the Relativistic Heavy Ion Collider (RHIC) (Accelerator Division, 2006) were performed by applying a small momentum offset to the circulating bunches without adjusting any bending magnets (Robert-Demolaize et al., 2019). The off-momentum linear optics were corrected back to on-momentum conditions. Applying a similarly small deviation to the dipole fields of a select set of bending magnets provides a large radial shift over much of the RHIC (or HSR) circumference while leaving the design trajectory unchanged in the insertion regions.</div><div>This paper presents the design of the different lattice configurations foreseen as the most viable options for the required HSR circumference changes, and highlights the modifications necessary for regular operations and to allow for testing these new settings in RHIC. Experimental results from 2021 and 2022 are reviewed and compared to model predictions obtained from both MAD-X and Bmad (MAD, 2002; Bmad, 2006). The implications of these results for HSR design are discussed.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1070 ","pages":"Article 170043"},"PeriodicalIF":1.5000,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0168900224009690","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}

引用次数: 0

Abstract

The Hadron Storage Ring (HSR) in the future Electron-Ion Collider (EIC) (EIC collaboration, 2020; Montag et al., 2022; Liu et al., 2022) must operate over a broad range of design circumferences. In 2018 preliminary beam studies on the circumference adjustment capabilities of the Relativistic Heavy Ion Collider (RHIC) (Accelerator Division, 2006) were performed by applying a small momentum offset to the circulating bunches without adjusting any bending magnets (Robert-Demolaize et al., 2019). The off-momentum linear optics were corrected back to on-momentum conditions. Applying a similarly small deviation to the dipole fields of a select set of bending magnets provides a large radial shift over much of the RHIC (or HSR) circumference while leaving the design trajectory unchanged in the insertion regions.

This paper presents the design of the different lattice configurations foreseen as the most viable options for the required HSR circumference changes, and highlights the modifications necessary for regular operations and to allow for testing these new settings in RHIC. Experimental results from 2021 and 2022 are reviewed and compared to model predictions obtained from both MAD-X and Bmad (MAD, 2002; Bmad, 2006). The implications of these results for HSR design are discussed.

查看原文本刊更多论文

RHIC 大径向偏移实验及其对 EIC 设计的影响

未来电子-离子对撞机（EIC）（EIC collaboration，2020；Montag 等人，2022；Liu 等人，2022）中的强子存储环（HSR）必须在广泛的设计周长范围内运行。2018 年，对相对论重离子对撞机（RHIC）（加速器分部，2006 年）的周长调整能力进行了初步的光束研究，方法是在不调整任何弯曲磁铁的情况下，对循环束施加一个小的动量偏移（Robert-Demolaize 等，2019 年）。偏离动量的线性光学器件被校正回动量条件。本文介绍了不同晶格配置的设计，这些配置被认为是实现 HSR 周长变化的最可行方案，并强调了常规运行所需的修改，以及在 RHIC 中测试这些新设置所需的修改。对 2021 年和 2022 年的实验结果进行了回顾，并与 MAD-X 和 Bmad 的模型预测结果进行了比较（MAD，2002 年；Bmad，2006 年）。讨论了这些结果对高铁设计的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.