Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment最新文献_第2页

Corrigendum to “Improving treatment quality of gynecologic cancers with online adaptive brachytherapy using deep learning-based CT imaging” [Nuclear Instrum. Method. Phys. Res. Sec. A: Accelerat. Spectrometer. Detector. Associat. Equipm. 1072 (2025) 170149] “利用基于深度学习的CT成像在线适应性近距离治疗提高妇科癌症治疗质量”的勘误表[Nuclear instrument]。方法。理论物理。答：第A节：加速。谱仪。探测器。组合。设备。1072 (2025)170149]

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 : 2025-04-25 DOI: 10.1016/j.nima.2025.170531

Hyemi Kim, Minjae Lee, Hyun Joon Choi

引用次数: 0

Expanding polarization bandwidth in neutron optics by eliminating the non-polarized low scattering vector region 通过消除非偏振低散射矢量区来扩大中子光学的偏振带宽

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 : 2025-04-25 DOI: 10.1016/j.nima.2025.170576

A. Zubayer , N. Ghafoor , A. Glavic , J. Stahn , M. Lorentzon , A. Le Febvrier , P. Eklund , J. Birch , F. Eriksson

{"title":"Expanding polarization bandwidth in neutron optics by eliminating the non-polarized low scattering vector region","authors":"A. Zubayer , N. Ghafoor , A. Glavic , J. Stahn , M. Lorentzon , A. Le Febvrier , P. Eklund , J. Birch , F. Eriksson","doi":"10.1016/j.nima.2025.170576","DOIUrl":"10.1016/j.nima.2025.170576","url":null,"abstract":"<div><div>Polarized neutron scattering is an important analysis technique offering valuable information in research fields such as magnetism and magnetic materials, condensed matter physics, and soft matter and biological systems. Enhancing these experiments relies on the performance of polarizing neutron optics to provide reflectivity and polarization at a variety of scattering vectors <em>q</em><sub><em>z</em></sub>. State-of-the-art Fe/Si supermirror polarizers have an unpolarized <em>q</em><sub><em>z</em></sub><em>-</em>region below the critical vector <em>q</em><sub><em>c</em></sub> of Si, while FeCoV/TiN supermirrors with a neutron absorbing Gd layer, can polarize at lower angles but cannot operate in transmission mode due to neutron beings absorbed. To address these challenges, the use of Co/Ti supermirrors on Ti substrates is proposed due to their favorable scattering length density characteristics and without using a neutron absorbing layer. This approach enables the possibility of a higher degree of design flexibility for e.g. transmission polarizers. It allows for the lowest possible high-<em>q</em><sub><em>z</em></sub> limit (the m-value of the coating) for a given lower wavelength limit and beam divergence.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170576"},"PeriodicalIF":1.5,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878699","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

Experimental design of a W-band corrugated waveguide for wakefield acceleration studies 尾流场加速度研究用w波段波纹波导的实验设计

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 : 2025-04-25 DOI: 10.1016/j.nima.2025.170549

B. Leung , A. Ody , C. Phillips , C. Whiteford , D. Mihalcea , E. Wisniewski , G. Chen , G. Ha , O. Ramanchandran , J. Power , P. Piot , S. Doran , W. Liu , X. Lu

{"title":"Experimental design of a W-band corrugated waveguide for wakefield acceleration studies","authors":"B. Leung , A. Ody , C. Phillips , C. Whiteford , D. Mihalcea , E. Wisniewski , G. Chen , G. Ha , O. Ramanchandran , J. Power , P. Piot , S. Doran , W. Liu , X. Lu","doi":"10.1016/j.nima.2025.170549","DOIUrl":"10.1016/j.nima.2025.170549","url":null,"abstract":"<div><div>Radiofrequency (RF) structures in the sub-terahertz (sub-THz) regime are of interest for applications in structure wakefield acceleration due to their compact size and potential for high gradients. We present the design, fabrication, and experimental setup of a metallic corrugated waveguide at 110 GHz, optimized for the 42 MeV electron beam parameters at the Argonne Wakefield Accelerator (AWA). The emittance exchange (EEX) beamline at AWA was used to perform longitudinal bunch shaping for two cases: (1) a high decelerating gradient experienced by a single drive electron bunch about <span><math><mrow><mn>250</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> long; (2) a high transformer ratio using a two-bunch train consisting of a triangularly shaped drive bunch followed by a long witness bunch to probe the wakefield. Preliminary experimental results are presented, and data analysis is ongoing.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170549"},"PeriodicalIF":1.5,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902067","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 of an open-source nuclear event discrimination pipeline using FPGA-based systems: Comprehensive approach with data acquisition, noise filtering, trapezoidal shaping, and benchmarking with ionization and Scintillation detection technology 使用基于fpga的系统开发开源核事件识别管道：数据采集，噪声滤波，梯形成形以及电离和闪烁检测技术的基准测试的综合方法

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 : 2025-04-24 DOI: 10.1016/j.nima.2025.170546

Fabian Andres Castaño , Luis Felipe Ramírez , Sebastian Montoya , Daniel Estrada , Jorge Hernán López

{"title":"Development of an open-source nuclear event discrimination pipeline using FPGA-based systems: Comprehensive approach with data acquisition, noise filtering, trapezoidal shaping, and benchmarking with ionization and Scintillation detection technology","authors":"Fabian Andres Castaño , Luis Felipe Ramírez , Sebastian Montoya , Daniel Estrada , Jorge Hernán López","doi":"10.1016/j.nima.2025.170546","DOIUrl":"10.1016/j.nima.2025.170546","url":null,"abstract":"<div><div>This study addresses the need for high-speed detection and processing systems in nuclear radiation analysis and particle detection, particularly for critical experiments like DUNE. A digital signal processing pipeline was developed, based on acquiring signals from Geiger and Scintillation detectors for Thorium 232 (<span><math><mrow><msup><mrow></mrow><mrow><mn>232</mn></mrow></msup><mtext>Th</mtext></mrow></math></span>), Americium 241 (<span><math><mrow><msup><mrow></mrow><mrow><mn>241</mn></mrow></msup><mtext>Am</mtext></mrow></math></span>) and Cobalt 60 (<span><math><mrow><msup><mrow></mrow><mrow><mn>60</mn></mrow></msup><mtext>Co</mtext></mrow></math></span>) samples. This pipeline incorporates the design and implementation of a FIR filter and a trapezoidal shaper to enhance the signal-to-noise ratio and enable energy estimation through a pulse height discriminator. Validation of the pipeline on an AMD Xilinx ZYNQ 7000 SoC achieved an 89% signal modeling accuracy and reduced the pile-up effect in events. The Multichannel Spectrum Analyzer successfully discriminated events across different energy channels in both simulation and real event acquisition, yielding energy spectra for radioactive isotopes. Emphasizing the importance of open-source tool development, this work is accessible in a public repository. As future work, a design for a reconfigurable and accessible platform from the processing system is proposed, alongside validating the pipeline with other isotopes, detectors, and higher-speed and resolution ADCs is also proposed.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170546"},"PeriodicalIF":1.5,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890809","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

FSTU-Net: A sparse-view CT reconstruction framework for enhanced imaging efficiency and quality in neutron tomography FSTU-Net：用于提高中子层析成像效率和质量的稀疏视图CT重建框架

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 : 2025-04-23 DOI: 10.1016/j.nima.2025.170524

Shengxiang Wang , Jianfang Li , Yakang Li , Le Wei , Yong Lei , Jiancong Li , Le Dong , Xin Shu , Fazhi Qi , Jie Chen

{"title":"FSTU-Net: A sparse-view CT reconstruction framework for enhanced imaging efficiency and quality in neutron tomography","authors":"Shengxiang Wang , Jianfang Li , Yakang Li , Le Wei , Yong Lei , Jiancong Li , Le Dong , Xin Shu , Fazhi Qi , Jie Chen","doi":"10.1016/j.nima.2025.170524","DOIUrl":"10.1016/j.nima.2025.170524","url":null,"abstract":"<div><div>Computed tomography (CT) imaging has revolutionized non-destructive testing and scientific research by enabling three-dimensional visualization of internal structures. Among the various CT modalities, neutron CT stands out for its exceptional capabilities in material characterization and analysis. However, both neutron and X-ray CT face significant challenges when dealing with sparse-view data acquisition, which often leads to reconstruction artifacts and degraded image quality. To address these issues and enhance imaging efficiency, we propose a novel sparse-view CT reconstruction framework, Filtered Swin Transformer U-Net (FSTU-Net). This framework combines filtered back projection for initial reconstruction with Swin Transformer U-Net for refinement. The FSTU-Net leverages the global modeling power of the Swin Transformer and the multi-scale feature fusion of U-Net to recover fine structural details while mitigating streak artifacts. The shifted window attention mechanism of the Swin Transformer ensures efficient feature extraction, making the method computationally efficient and suitable for large-scale neutron CT imaging facilities like the China Spallation Neutron Source. Our experiments on multiple neutron CT datasets validate the effectiveness of FSTU-Net, demonstrating superior denoising and structural preservation, even when trained on mixed datasets. These results underscore the framework’s potential in improving imaging efficiency and quality for neutron sparse-view CT.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170524"},"PeriodicalIF":1.5,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886901","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

Global crystal identification of light-sharing PET detectors using convolutional neural networks 基于卷积神经网络的共光PET探测器全局晶体识别

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 : 2025-04-23 DOI: 10.1016/j.nima.2025.170564

Eiji Yoshida, Go Akamatsu, Hideaki Tashima, Taiga Yamaya

{"title":"Global crystal identification of light-sharing PET detectors using convolutional neural networks","authors":"Eiji Yoshida, Go Akamatsu, Hideaki Tashima, Taiga Yamaya","doi":"10.1016/j.nima.2025.170564","DOIUrl":"10.1016/j.nima.2025.170564","url":null,"abstract":"<div><div>In light-sharing positron emission tomography (PET) detectors, Anger logic enables identification of crystals smaller than the photodetector size. This approach, which employs a 2D position histogram and pixel-to-crystal mapping, is widely adopted due to its hardware implementation simplicity. In contrast, independent readout systems allow interaction detection using light distribution analysis via photodetector arrays, as each photodetector collects signals independently. Both approaches require detector-specific recalibration during manufacturing, maintenance, and replacement. In this work, we develop a PET scanner-wide crystal identifier using convolutional neural networks (CNNs). Using independent photodetector signals obtained experimentally, the CNN processes crystal addresses derived via Anger logic as training data. When applied to a small animal PET scanner with 126 light-sharing PET detectors, the model is trained using 5 million events from only 40 detectors after denoising, which particularly includes removal of inter-crystal scattering (ICS). By learning light distribution, the CNN also operates as an ICS identifier that sets thresholds to suppress ICS events. With 98 % accuracy in photoelectric absorption events, we confirm a small rod phantom, validated to have similar timing and imaging performance as for Anger logic, provides a 1.7-fold improvement in sensitivity. This CNN-based crystal identifier eliminates the need for recalibration while maintaining image quality and offering applications in maintenance, replacement, and mass production.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170564"},"PeriodicalIF":1.5,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876979","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

Production and manipulation of stable frozen hydrogen filaments 稳定冷冻氢丝的生产和操作

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 : 2025-04-22 DOI: 10.1016/j.nima.2025.170526

Jost Froning, Christian Mannweiler, Eva-Maria Hausch, Anna Luna Hannen, Alfons Khoukaz

{"title":"Production and manipulation of stable frozen hydrogen filaments","authors":"Jost Froning, Christian Mannweiler, Eva-Maria Hausch, Anna Luna Hannen, Alfons Khoukaz","doi":"10.1016/j.nima.2025.170526","DOIUrl":"10.1016/j.nima.2025.170526","url":null,"abstract":"<div><div>Frozen hydrogen filaments or droplets/pellets in vacuum are of great interest as target for many experiments at hadron and lepton accelerators as well as at high-power laser systems. Especially in case of large distances between the position of target beam generation and the interaction point with an accelerator or laser beam, a high target beam stability in space and time is crucial. Here we present recent results on the long-term stability of frozen hydrogen filaments in vacuum, which have been obtained using a new cryogenic target generator. It could be shown that the trajectory of the frozen hydrogen target beam with a diameter of 10µm remains stable for over 60 h, with angular fluctuations below 0.08°. Furthermore, we present a novel strategy for the manipulation of the target beam, named cryobending. Here, the produced hydrogen filament is deflected by helium gas emerging from correction nozzles. We demonstrate the deflection of the hydrogen beam with one and two nozzles, achieving deflection angles up to 15.7(4)°. The presented results open the door for further developments of this beam position system, which enables target beam adjustment without any mechanical movement of the target components itself. Potential applications of these stable hydrogen target filaments are, e.g., the upcoming MAGIX (MAinz Gas Injection target eXperiment) or the planned <span><math><mover><mrow><mi>P</mi></mrow><mrow><mo>̄</mo></mrow></mover></math></span>ANDA (anti-Proton ANnihilation at DArmstadt) experiment.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170526"},"PeriodicalIF":1.5,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870044","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

The development of high-temperature heterogeneous catalysis sample environment equipment for neutron scattering at CSNS CSNS中子散射高温非均相催化样品环境装置的研制

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 : 2025-04-22 DOI: 10.1016/j.nima.2025.170554

Chenyang Wang , Bao Yuan , Juping Xu , Huaican Chen , Wentao Zheng , Wendong Liang , Mengjia Dou , Hongbin Luo , Zhiqiang Huang , Wen Yin , Haitao Hu , Xin Tong

{"title":"The development of high-temperature heterogeneous catalysis sample environment equipment for neutron scattering at CSNS","authors":"Chenyang Wang , Bao Yuan , Juping Xu , Huaican Chen , Wentao Zheng , Wendong Liang , Mengjia Dou , Hongbin Luo , Zhiqiang Huang , Wen Yin , Haitao Hu , Xin Tong","doi":"10.1016/j.nima.2025.170554","DOIUrl":"10.1016/j.nima.2025.170554","url":null,"abstract":"<div><div>The advancement of time-, space-, and energy-resolved in-situ characterization techniques utilizing neutron penetration and sensitivity to light elements has significantly improved our understanding of surface/interface structure-catalytic relationships in catalytic materials at atomic/molecular scales. The development of specialized sample environment equipment for catalysis is essential for enhancing in-situ characterization technology. In this study, we designed an in-situ neutron scattering sample environment capable of facilitating heterogeneous catalytic reactions (including gas-solid, liquid-solid, and gas-liquid-solid reactions) at 800 °C and 0.1 MPa. The system includes a gas-liquid controller, a catalytic reaction insert (CRI), a tail gas absorption cell, and a tail gas line. We evaluated the temperature and stress distribution during long-cycle operations through numerical simulations of the CRI, while the temperature calibration curve was established via offline testing, and background scattering measurements were obtained through online testing. We have completed the commissioning of the equipment, making it available for user operations.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170554"},"PeriodicalIF":1.5,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878701","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

Finite grid instability and its relationship with aliasing 有限网格不稳定性及其与混叠的关系

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 : 2025-04-22 DOI: 10.1016/j.nima.2025.170533

R.G. Udby, B.A. Shadwick

引用次数: 0

Prototype TOF-tracker MRPC for timing and position measurement in the J-PARC MARQ experiment J-PARC MARQ实验中TOF-tracker MRPC的定时和位置测量原型

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 : 2025-04-22 DOI: 10.1016/j.nima.2025.170517

Natsuki Tomida , Ryotaro Koike , Ryusuke Uda , Futaba Hayashi , Atsushi Sakaguchi , Chia-Yu Hsieh , Ken Suzuki , Kotaro Shirotori , Ming-Lee Chu , Rintaro Okazaki , Wen-Chen Chang

引用次数: 0