Physical Review Accelerators and Beams最新文献_第4页

First experimental evidence of a beam-beam long-range compensation using wires in the Large Hadron Collider 在大型强子对撞机中使用导线进行束-束长程补偿的首个实验证据

IF 1.7 3区物理与天体物理

Physical Review Accelerators and Beams Pub Date : 2024-07-23 DOI: 10.1103/physrevaccelbeams.27.071003

A. Poyet, A. Bertarelli, F. Carra, S. D. Fartoukh, N. Fuster-Martínez, N. Karastathis, Y. Papaphilippou, M. Pojer, S. Redaelli, A. Rossi, K. Skoufaris, M. Solfaroli Camillocci, G. Sterbini

{"title":"First experimental evidence of a beam-beam long-range compensation using wires in the Large Hadron Collider","authors":"A. Poyet, A. Bertarelli, F. Carra, S. D. Fartoukh, N. Fuster-Martínez, N. Karastathis, Y. Papaphilippou, M. Pojer, S. Redaelli, A. Rossi, K. Skoufaris, M. Solfaroli Camillocci, G. Sterbini","doi":"10.1103/physrevaccelbeams.27.071003","DOIUrl":"https://doi.org/10.1103/physrevaccelbeams.27.071003","url":null,"abstract":"In high intensity and high energy colliders, such as the CERN Large Hadron Collider (LHC) and its future high-luminosity upgrade, interactions between the two beams around the different interaction points impose machine performance limitations. In fact, their effect reduces the beam lifetime, and therefore, the collider’s luminosity reach. Those interactions are called beam-beam long-range (BBLR) interactions, and a possible mitigation of their effect using dc wires was proposed for the first time in the early 2000’s. This solution is currently being studied as an option for enhancing the HL-LHC performance. In 2017 and 2018, four demonstrators of wire compensators have been installed in the LHC. A 2-yearlong experimental campaign followed in order to validate the possibility to mitigate the BBLR interactions in the LHC. During this campaign, a proof-of-concept was completed and motivated an additional set of experiments, successfully demonstrating the mitigation of BBLR interactions effects in beam conditions compatible with the operational configuration. This paper reports in detail the preparation of the experimental campaign, including the corresponding tracking simulations and the obtained results, and draws some perspectives for the future.","PeriodicalId":54297,"journal":{"name":"Physical Review Accelerators and Beams","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141774413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mitigation of the microbunching instability through transverse Landau damping 通过横向朗道阻尼缓解微冲不稳定性

IF 1.7 3区物理与天体物理

Physical Review Accelerators and Beams Pub Date : 2024-07-22 DOI: 10.1103/physrevaccelbeams.27.074402

A. D. Brynes, G. Perosa, C.-Y. Tsai, E. Allaria, L. Badano, G. De Ninno, E. Ferrari, D. Garzella, L. Giannessi, G. Penco, P. Rebernik Ribič, E. Roussel, S. Spampinati, C. Spezzani, M. Trovò, M. Veronese, S. Di Mitri

引用次数: 0

Four-dimensional phase-space reconstruction of flat and magnetized beams using neural networks and differentiable simulations 利用神经网络和可微模拟重建平面和磁化光束的四维相空间

IF 1.7 3区物理与天体物理

Physical Review Accelerators and Beams Pub Date : 2024-07-22 DOI: 10.1103/physrevaccelbeams.27.074601

Seongyeol Kim, Juan Pablo Gonzalez-Aguilera, Philippe Piot, Gongxiaohui Chen, Scott Doran, Young-Kee Kim, Wanming Liu, Charles Whiteford, Eric Wisniewski, Auralee Edelen, Ryan Roussel, John Power

{"title":"Four-dimensional phase-space reconstruction of flat and magnetized beams using neural networks and differentiable simulations","authors":"Seongyeol Kim, Juan Pablo Gonzalez-Aguilera, Philippe Piot, Gongxiaohui Chen, Scott Doran, Young-Kee Kim, Wanming Liu, Charles Whiteford, Eric Wisniewski, Auralee Edelen, Ryan Roussel, John Power","doi":"10.1103/physrevaccelbeams.27.074601","DOIUrl":"https://doi.org/10.1103/physrevaccelbeams.27.074601","url":null,"abstract":"Beams with cross-plane coupling or extreme asymmetries between the two transverse phase spaces are often encountered in particle accelerators. Flat beams with large transverse-emittance ratios are critical for future linear colliders. Similarly, magnetized beams with significant cross-plane coupling are expected to enhance the performance of electron cooling in hadron beams. Preparing these beams requires precise control and characterization of the four-dimensional transverse phase space. In this study, we employ generative phase-space reconstruction techniques to rapidly characterize magnetized and flat-beam phase-space distributions using a conventional quadrupole-scan method. The reconstruction technique is experimentally demonstrated on an electron beam produced at the Argonne Wakefield Accelerator and successfully benchmarked against conventional diagnostics techniques. Specifically, we show that predicted beam parameters from the reconstructed phase-space distributions (e.g., as magnetization and flat-beam emittances) are in excellent agreement with those measured from the conventional diagnostic methods.","PeriodicalId":54297,"journal":{"name":"Physical Review Accelerators and Beams","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser-driven acceleration of a 94.8 MeV uniform proton beam enhanced by a thin axial absorber rod 通过轴向细吸收棒增强 94.8 MeV 均匀质子束的激光驱动加速度

IF 1.7 3区物理与天体物理

Physical Review Accelerators and Beams Pub Date : 2024-07-22 DOI: 10.1103/physrevaccelbeams.27.073501

Husam Y. Al-Omari, Mohamed E. Yahia, Ali M. Almomani

{"title":"Laser-driven acceleration of a 94.8 MeV uniform proton beam enhanced by a thin axial absorber rod","authors":"Husam Y. Al-Omari, Mohamed E. Yahia, Ali M. Almomani","doi":"10.1103/physrevaccelbeams.27.073501","DOIUrl":"https://doi.org/10.1103/physrevaccelbeams.27.073501","url":null,"abstract":"Laser-based proton accelerators offer promising advantages for many sensitive applications due to their compact size. However, achieving uniform beams with a narrow energy spread remains a challenge. Here, a beamline simulation is performed using the tracewin and srim codes to optimize the spectral and spatial characteristics of a laser-driven proton beam. This beamline, comprised of four magnetic quadrupoles and equipped with a thin axial absorber rod in conjunction with an energy selection aperture for narrowing the energy spread, a carbon scatterer foil for beam spot smoothing, and an angular selection aperture for beam collimation, effectively transports a selected proton beam energy within the range of 50–250 MeV. In this work, laser-accelerated protons with a wide energy spread were transported through the proposed beamline, which was optimized for 109 MeV protons. The protons emerged well-collimated with a significantly narrowed energy spread of <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mn>94.8</mn><mo>±</mo><mn>3.9</mn><mtext> </mtext><mtext> </mtext><mi>MeV</mi></math> (a reduction from the intended 109 MeV due to passage through the scatterer) and a homogenized, 11 mm diameter beam spot while maintaining a transmission efficiency above 2.2%.","PeriodicalId":54297,"journal":{"name":"Physical Review Accelerators and Beams","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generation of 1.6 GeV single-particle proton beams 产生 1.6 GeV 单粒子质子束

IF 1.5 3区物理与天体物理

Physical Review Accelerators and Beams Pub Date : 2024-07-15 DOI: 10.1103/physrevaccelbeams.27.070401

Kai Zhou, Yanliang Han, Zhiping Li, Hantao Jing, Yong‐Qin Yu

{"title":"Generation of 1.6 GeV single-particle proton beams","authors":"Kai Zhou, Yanliang Han, Zhiping Li, Hantao Jing, Yong‐Qin Yu","doi":"10.1103/physrevaccelbeams.27.070401","DOIUrl":"https://doi.org/10.1103/physrevaccelbeams.27.070401","url":null,"abstract":"We present a scattering slow extraction method employing a rotating foil in the Rapid Cycling Synchrotron (RCS) to produce a stable 1.6 GeV single-particle proton beam at CSNS. The foil scatters particles on the beam’s edge over multiple turns, with those at large scattering angles being separated and extracted through a Lambertson magnet. By adjusting the scatter foil’s rotational speed and position, we can precisely control the intensity and repetition rate of the extracted beam. This approach enables the efficient extraction of extremely low-intensity proton beams from CSNS-II/RCS. By setting single-particle collimators in the downstream beamline, a single-particle proton beam is achieved. Using 4y, we simulated the scattering slow extraction process in detail, confirming that a stable 1.6 GeV single-particle proton beam can be extracted, the beam energy can be adjusted from 0.8 to 1.6 GeV using the degrader, the time interval between adjacent single protons can be adjusted from hundreds of nanoseconds to tens of microseconds, to meet the needs of different experiments. Both the beam loss and the residual radiation doses are kept at low levels.\u0000 \u0000 \u0000 \u0000 \u0000 Published by the American Physical Society\u0000 2024\u0000 \u0000 \u0000","PeriodicalId":54297,"journal":{"name":"Physical Review Accelerators and Beams","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141646142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fast polarization switching of undulator radiation up to kilohertz with magnetic field modulation 利用磁场调制实现高达千赫的起伏器辐射快速偏振切换

IF 1.5 3区物理与天体物理

Physical Review Accelerators and Beams Pub Date : 2024-07-15 DOI: 10.1103/physrevaccelbeams.27.070702

Nanrui Yang, Zhouyu Zhao, Heting Li

引用次数: 0

Wavelength scaling and multicolor operation of a plasma-driven attosecond x-ray source via harmonic generation 通过谐波发生实现等离子体驱动的阿秒 X 射线源的波长扩展和多色运行

IF 1.7 3区物理与天体物理

Physical Review Accelerators and Beams Pub Date : 2024-07-12 DOI: 10.1103/physrevaccelbeams.27.070701

Rafi Hessami, Jenny Morgan, River Robles, Kirk A. Larsen, Agostino Marinelli, Claudio Emma

引用次数: 0

Empty-bucket techniques for spill-quality improvement at the CERN Super Proton Synchrotron 用于提高欧洲核子研究中心超级质子同步加速器溢出质量的空桶技术

IF 1.7 3区物理与天体物理

Physical Review Accelerators and Beams Pub Date : 2024-07-09 DOI: 10.1103/physrevaccelbeams.27.074001

Pablo A. Arrutia Sota, Matthew A. Fraser, Gregoire Hagmann, Verena Kain, Giulia Papotti, Arthur Spierer, Francesco M. Velotti, Philip N. Burrows, Roberto Piandani

{"title":"Empty-bucket techniques for spill-quality improvement at the CERN Super Proton Synchrotron","authors":"Pablo A. Arrutia Sota, Matthew A. Fraser, Gregoire Hagmann, Verena Kain, Giulia Papotti, Arthur Spierer, Francesco M. Velotti, Philip N. Burrows, Roberto Piandani","doi":"10.1103/physrevaccelbeams.27.074001","DOIUrl":"https://doi.org/10.1103/physrevaccelbeams.27.074001","url":null,"abstract":"Synchrotrons can provide long spills of particles by employing resonant extraction where the circulating beam is slowly ejected over thousands to millions of turns by exploiting the amplitude growth caused by a transverse resonance. In the CERN Super Proton Synchrotron (SPS), this method is used to satisfy the experimental requests of the North Area. However, the extracted particle flux is modulated by power-converter ripple, an issue shared across all sychrotrons that perform resonant extraction. In order to suppress such modulations, empty-bucket techniques can be employed, which take advantage of chromaticity to quickly accelerate particles into resonant motion by using a longitudinal rf system. This paper explores empty-bucket techniques via theory, simulation, and measurement, providing a systematic characterization with general applicability to any machine. Additionally, the operational implementation in the SPS is detailed, where the impact on the beam profile and extracted intensity is addressed.","PeriodicalId":54297,"journal":{"name":"Physical Review Accelerators and Beams","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141571044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulation of RHIC polarized proton run 17 spin flipper experiments RHIC 偏振质子运行 17 自旋翻转实验的数值模拟

IF 1.7 3区物理与天体物理

Physical Review Accelerators and Beams Pub Date : 2024-07-09 DOI: 10.1103/physrevaccelbeams.27.071002

F. Méot, P. Adams, H. Huang, J. Kewisch, P. Oddo, T. Roser

引用次数: 0

Generalized threshold of longitudinal multibunch instability in synchrotrons 同步加速器纵向多束不稳定性的广义阈值

IF 1.7 3区物理与天体物理

Physical Review Accelerators and Beams Pub Date : 2024-07-08 DOI: 10.1103/physrevaccelbeams.27.074401

Ivan Karpov, Elena Shaposhnikova

引用次数: 0