High intensity beam dynamics assessment and challenges for HL-LHC

IF 1.3 4区工程技术 Q3 INSTRUMENTS & INSTRUMENTATION Journal of Instrumentation Pub Date : 2024-05-01 DOI:10.1088/1748-0221/19/05/t05016

N. Mounet, R. Tomás, D. Amorim, C. Antuono, N. Biancacci, H. Bartosik, P. Baudrenghien, R. Bruce, X. Buffat, R. Calaga, R. De Maria, C. Droin, L. Giacomel, M. Giovannozzi, G. Iadarola, S. Kostoglou, A. Kurtulus, B. Lindström, L. Mether, E. Metral, Yannis Panagiotis Papaphilippou, K. Paraschou, S. Redaelli, G. Rumolo, B. Salvant, L. Sito, G. Sterbini, C. Zannini

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Abstract

The High Luminosity (HL-LHC) project aims to increase the integrated luminosity of CERN's Large Hadron Collider (LHC) by an order of magnitude compared to its initial design. This requires a large increase in bunch intensity and beam brightness compared to the first three LHC runs, and hence poses serious collective-effects challenges, related in particular to electron cloud, instabilities from beam-coupling impedance, and beam-beam effects. Here, we present the associated constraints and the mitigation measures proposed to achieve the baseline performance of the upgraded LHC machine. We also discuss the interplay of these mitigation measures with other aspects of the accelerator, such as optics, physical and dynamic apertures, the collimation system, and crab cavities. Additional potential sources of intensity limitations are also briefly discussed.

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高强度光束动力学评估与大型强子对撞机面临的挑战

高亮度（HL-LHC）项目旨在将欧洲核子研究中心（CERN）大型强子对撞机（LHC）的综合亮度比最初设计提高一个数量级。与前三次大型强子对撞机运行相比，这要求束流强度和束流亮度大幅增加，因此带来了严重的集体效应挑战，特别是与电子云、束流耦合阻抗产生的不稳定性和束流效应有关的挑战。在此，我们将介绍相关的限制因素以及为实现升级版大型强子对撞机的基线性能而提出的缓解措施。我们还讨论了这些缓解措施与加速器其他方面的相互作用，如光学、物理和动态孔径、准直系统和蟹腔。我们还简要讨论了强度限制的其他潜在来源。

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来源期刊

Journal of Instrumentation 工程技术-仪器仪表

CiteScore

2.40

自引率

15.40%

发文量

827

审稿时长

7.5 months

期刊介绍： Journal of Instrumentation (JINST) covers major areas related to concepts and instrumentation in detector physics, accelerator science and associated experimental methods and techniques, theory, modelling and simulations. The main subject areas include. -Accelerators: concepts, modelling, simulations and sources- Instrumentation and hardware for accelerators: particles, synchrotron radiation, neutrons- Detector physics: concepts, processes, methods, modelling and simulations- Detectors, apparatus and methods for particle, astroparticle, nuclear, atomic, and molecular physics- Instrumentation and methods for plasma research- Methods and apparatus for astronomy and astrophysics- Detectors, methods and apparatus for biomedical applications, life sciences and material research- Instrumentation and techniques for medical imaging, diagnostics and therapy- Instrumentation and techniques for dosimetry, monitoring and radiation damage- Detectors, instrumentation and methods for non-destructive tests (NDT)- Detector readout concepts, electronics and data acquisition methods- Algorithms, software and data reduction methods- Materials and associated technologies, etc.- Engineering and technical issues. JINST also includes a section dedicated to technical reports and instrumentation theses.