Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment最新文献

Phase-Imaging Ion-Cyclotron-Resonance mass spectrometry with the Canadian Penning Trap at CARIBU

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-02 DOI: 10.1016/j.nima.2025.170433

D. Ray , A.A. Valverde , M. Brodeur , F. Buchinger , J.A. Clark , B. Liu , G.E. Morgan , R. Orford , W.S. Porter , G. Savard , K.S. Sharma , X.L. Yan

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Seven-dimensional trajectory reconstruction for VAMOS++

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-31 DOI: 10.1016/j.nima.2025.170445

M. Rejmund, A. Lemasson

{"title":"Seven-dimensional trajectory reconstruction for VAMOS++","authors":"M. Rejmund, A. Lemasson","doi":"10.1016/j.nima.2025.170445","DOIUrl":"10.1016/j.nima.2025.170445","url":null,"abstract":"<div><div>The VAMOS++ magnetic spectrometer is characterized by a large angular and momentum acceptance and highly non-linear ion optics properties requiring the use of software ion trajectory reconstruction methods to measure the ion magnetic rigidity and the trajectory length between the beam interaction point and the focal plane of the spectrometer. Standard measurements, involving the use of a thin target and a narrow beam spot, allow the assumption of a point-like beam interaction volume for ion trajectory reconstruction. However, this represents a limitation for the case of large beam spot size or extended gaseous target volume. To overcome this restriction, a seven-dimensional reconstruction method incorporating the reaction position coordinates was developed, making use of artificial deep neural networks. The neural networks were trained on a theoretical dataset generated by standard magnetic ray-tracing code. Future application to a voluminous gas target, necessitating the explicit inclusion of the three-dimensional position of the beam interaction point within the target in the trajectory reconstruction method, is discussed. The performances of the new method are presented along with a comparison of mass resolution obtained with previously reported model for the case of thin-target experimental data.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170445"},"PeriodicalIF":1.5,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739160","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}

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Spatiotemporal correction of ultrashort electron beam with radially polarized laser

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-31 DOI: 10.1016/j.nima.2025.170455

Zixin Guo, Haoran Zhang, Xiazhen Xu, Jingya Li, Zhigang He, Shancai Zhang, Lin Wang

{"title":"Spatiotemporal correction of ultrashort electron beam with radially polarized laser","authors":"Zixin Guo, Haoran Zhang, Xiazhen Xu, Jingya Li, Zhigang He, Shancai Zhang, Lin Wang","doi":"10.1016/j.nima.2025.170455","DOIUrl":"10.1016/j.nima.2025.170455","url":null,"abstract":"<div><div>The manipulation of ultrashort electron beams, particularly in the sub-femtosecond range, faces significant challenges due to the spherical aberration and temporal distortion caused by magnetic components during the beam’s generation and transport. These challenges critically affect the spatial and temporal distribution of the beams, limiting their potential for further applications. In this paper, we propose a novel optical correction method that uses a focused radially polarized laser to simultaneously correct both spherical aberration and temporal distortion. Under the assumption of no space charge effects, simulation results present remarkable improvements, with a 65.3% reduction in transverse beam size, a 48.5% reduction in transverse normalized emittance, and an effective mitigation of temporal distortion. These improvements in beam quality provide unprecedented opportunities for the spatiotemporal manipulation of ultrashort electron beams and their broader applications.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170455"},"PeriodicalIF":1.5,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747814","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

Intrinsic performance parameters assessment of various scintillation crystals for a SPECT gamma camera

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-29 DOI: 10.1016/j.nima.2025.170447

Anes Hayder , Tuncay Bayram , Sonay Gedik , Bircan Sönmez , Pelin Duman , Canan Yavruoğlu

{"title":"Intrinsic performance parameters assessment of various scintillation crystals for a SPECT gamma camera","authors":"Anes Hayder , Tuncay Bayram , Sonay Gedik , Bircan Sönmez , Pelin Duman , Canan Yavruoğlu","doi":"10.1016/j.nima.2025.170447","DOIUrl":"10.1016/j.nima.2025.170447","url":null,"abstract":"<div><div>Intrinsic performance parameters are a part of quality control tests for the Single Photon Emission Tomography (SPECT). These parameters are influenced by the optical and mechanical properties of the detector’s crystal, in addition to other detector components. In this study, intrinsic performance parameters (spatial resolution, energy resolution, and uniformity) tests were performed for both the SPECT scan and SPECT scan simulated model. Furthermore, these tests were also performed on the SPECT scan model simulated with GAGG, <span><math><msub><mrow><mi>LaCI</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>, <span><math><mi>CsI</mi></math></span>, <span><math><msub><mrow><mi>LaBr</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>, and <span><math><msub><mrow><mi>YAOI</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span> crystals at different thicknesses using <span><math><msup><mrow></mrow><mrow><mn>99</mn><mi>m</mi></mrow></msup></math></span>Tc isotope for low energy tests and <sup>131</sup>I isotope for high energy tests. The MTF (modulation transfer function) results for the SPECT scan simulation model response to resolve small bar pattern better than the experimental value of the SPECT scan. On the other hand, the difference between experiment and simulation values for intrinsic energy resolution at 140.5 keV and 364.5 keV ranges from 0.001% to 0.044% and 0.018% to 0.04%, respectively. The obtained intrinsic uniformity values for all SPECT simulation models and the experiment values for the SPECT scan are within the typical range.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170447"},"PeriodicalIF":1.5,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759510","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

Development and commissioning of a new readout system for the gas flow of the Belle II KL0 and muon detector

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-28 DOI: 10.1016/j.nima.2025.170427

T. Applegate , N. Brenny , C. Chen , S. Choudhury , J. Cochran , S. Kang , A. Khatri , H. Kindo , T. Lam , S. Mitra , A. Mubarak , L. Piilonen , S. Prell , M. Veronesi

引用次数: 0

Verification of the accuracy of a compact beam energy monitor

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-28 DOI: 10.1016/j.nima.2025.170483

Z. Kormány, L. Csedreki

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Radiation from a charged particle rotating around a ball of a dispersive matter

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-27 DOI: 10.1016/j.nima.2025.170462

L.Sh Grigoryan , H.F. Khachatryan , A.H. Mkrtchyan , S.B. Dabagov , A.A. Saharian , H.P. Harutyunyan , A.R. Mnatsakanyan , G.V. Margaryan , V. Kh Kotanjyan

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Is the gain–voltage dependence of SiPMs linear?

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-26 DOI: 10.1016/j.nima.2025.170444

M. Antonello, L. Brinkmann, E. Garutti, R. Klanner, J. Schwandt

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Magnetic alignment methods for stretched wire systems in the measurement of insertion device magnetic field integrals at HEPS

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-25 DOI: 10.1016/j.nima.2025.170471

Lingling Gong , Xiaoyu Li , Qing Guo , Yuhui Li , Huihua Lu

{"title":"Magnetic alignment methods for stretched wire systems in the measurement of insertion device magnetic field integrals at HEPS","authors":"Lingling Gong , Xiaoyu Li , Qing Guo , Yuhui Li , Huihua Lu","doi":"10.1016/j.nima.2025.170471","DOIUrl":"10.1016/j.nima.2025.170471","url":null,"abstract":"<div><div>The stretched wire system was widely employed in the development of insertion devices for HEPS, owing to its capability for rapid, high-precision, and efficient magnetic field integral measurements. However, the alignment accuracy of the wire remains a critical factor influencing the precision of these measurements. Traditional mechanical alignment methods are insufficient for high-precision requirements, as they cannot compensate for the inherent offset between the mechanical and magnetic centers. To address this limitation, this paper proposes two novel magnetic alignment methods based on theoretical analysis and experimental research. The first method was tailored for measuring single magnetic blocks. By evaluating the magnetic field integral with the block positioned in specific orientations, this method effectively eliminated measurement biases caused by angular deviations between the wire and the magnetic block, significantly improving measurement accuracy. The second method was designed for entire insertion devices. It introduced an innovative approach utilizing attached iron slices to generate a new reference signal, thereby reducing measurement biases between the Hall and stretched wire systems and enhancing the reliability of overall performance assessments. These magnetic alignment methods offered an efficient and innovative solution to improve the precision of magnetic field integral measurements at HEPS.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170471"},"PeriodicalIF":1.5,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724746","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}

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Design of compact neutron detector for tokamak

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-25 DOI: 10.1016/j.nima.2025.170456

Han Duan , Jie Zhang , Chaoyang Zhao , Yunsheng Zhang , Yipo Zhang , Zhonghai Wang

{"title":"Design of compact neutron detector for tokamak","authors":"Han Duan , Jie Zhang , Chaoyang Zhao , Yunsheng Zhang , Yipo Zhang , Zhonghai Wang","doi":"10.1016/j.nima.2025.170456","DOIUrl":"10.1016/j.nima.2025.170456","url":null,"abstract":"<div><div>Most neutron spectrometers currently used in tokamak devices are based on liquid scintillators coupled with photomultiplier tubes (PMTs), which present challenges due to their large size and susceptibility to electromagnetic interference. In recent years, silicon photomultipliers (SiPMs) have increasingly supplanted traditional PMTs with their advantages, including small size, high quantum efficiency, and resistance to electromagnetic interference. This study presents a novel type of neutron detector for tokamak neutron diagnostics, in which the neutron probe consists of a liquid scintillator, BC-501 A, coupled with a SiPM array. This neutron detector can be used for neutron flux monitoring and, in combination with spectral deconvolution, also for spectrum measurements. The detector was calibrated with several isotope gamma sources, and the discrimination performance was verified on an Am–Be neutron source and the HL-3 device. Results from the Am–Be neutron source experiments indicated that the n/γ figure of merit (FOM) was 1.56 within the energy range of 200–800 keVee. Similarly, on-site experiments conducted at the HL-3 device demonstrated that the FOM was 1.61 within the same discrimination energy range. Furthermore, the measured variation in neutron intensity over time aligned closely with results from multiple neutron detectors on site. This research indicates that the newly developed SiPM-based neutron detector has preliminarily demonstrated its capability to operate on tokamak devices. The next step involves calibrating neutron energy and calculating the response matrix to facilitate spectrum unfolding.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170456"},"PeriodicalIF":1.5,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705961","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