Nuclear Science and Techniques最新文献_第2页

Feasibility study of the photonuclear reaction cross section of medical radioisotopes using a laser Compton scattering gamma source 利用激光康普顿散射伽马源对医用放射性同位素的光核反应截面进行可行性研究

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-08-31 DOI: 10.1007/s41365-024-01481-7

Yu-Ning Gu, Wei-Juan Zhao, Xi-Guang Cao, Yu-Xuan Yang, Ting-Kai Ma, Zheng-Li Liao, Fei-Long Xu, Yu-Gang Ma

{"title":"Feasibility study of the photonuclear reaction cross section of medical radioisotopes using a laser Compton scattering gamma source","authors":"Yu-Ning Gu, Wei-Juan Zhao, Xi-Guang Cao, Yu-Xuan Yang, Ting-Kai Ma, Zheng-Li Liao, Fei-Long Xu, Yu-Gang Ma","doi":"10.1007/s41365-024-01481-7","DOIUrl":"https://doi.org/10.1007/s41365-024-01481-7","url":null,"abstract":"In recent years, the gap between the supply and demand of medical radioisotopes has increased, necessitating new methods for producing medical radioisotopes. Photonuclear reactions based on gamma sources have unique advantages in terms of producing high specific activity and innovative medical radioisotopes. However, the lack of experimental data on reaction cross sections for photonuclear reactions of medical radioisotopes of interest has severely limited the development and production of photonuclear transmutation medical radioisotopes. In this study, the entire process of the generation, decay, and measurement of medical radioisotopes was simulated using online gamma activation and offline gamma measurements combined with a shielding gamma-ray spectrometer. Based on a quasi-monochromatic gamma beam from the Shanghai Laser Electron Gamma Source (SLEGS), the feasibility of this measurement of production cross section for surveyed medical radioisotopes was simulated, and specific solutions for measuring medical radioisotopes with ultra-low production cross sections were provided. The feasibility of this method for high-precision measurements of the reaction cross section of medical radioisotopes was demonstrated.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"38 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142194405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Improved mass relations of mirror nuclei 镜像核质量关系的改进

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-08-31 DOI: 10.1007/s41365-024-01501-6

Cheng Xu, Man Bao

引用次数: 0

Sparse-view neutron CT 3D image reconstruction algorithm based on split Bregman method 基于分裂布雷格曼方法的稀疏视图中子 CT 三维图像重建算法

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-08-30 DOI: 10.1007/s41365-024-01439-9

Teng-Fei Zhu, Yang Liu, Zhi Luo, Xiao-Ping Ouyang

{"title":"Sparse-view neutron CT 3D image reconstruction algorithm based on split Bregman method","authors":"Teng-Fei Zhu, Yang Liu, Zhi Luo, Xiao-Ping Ouyang","doi":"10.1007/s41365-024-01439-9","DOIUrl":"https://doi.org/10.1007/s41365-024-01439-9","url":null,"abstract":"As a complement to X-ray computed tomography (CT), neutron tomography has been extensively used in nuclear engineering, materials science, cultural heritage, and industrial applications. Reconstruction of the attenuation matrix for neutron tomography with a traditional analytical algorithm requires hundreds of projection views in the range of 0° to 180° and typically takes several hours to complete. Such a low time-resolved resolution degrades the quality of neutron imaging. Decreasing the number of projection acquisitions is an important approach to improve the time resolution of images; however, this requires efficient reconstruction algorithms. Therefore, sparse-view reconstruction algorithms in neutron tomography need to be investigated. In this study, we investigated the three-dimensional reconstruction algorithm for sparse-view neutron CT scans. To enhance the reconstructed image quality of neutron CT, we propose an algorithm that uses OS-SART to reconstruct images and a split Bregman to solve for the total variation (SBTV). A comparative analysis of the performances of each reconstruction algorithm was performed using simulated and actual experimental data. According to the analyzed results, OS-SART-SBTV is superior to the other algorithms in terms of denoising, suppressing artifacts, and preserving detailed structural information of images.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"41 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142194236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 X-ray imaging beamline at SSRF SSRF 快速 X 射线成像光束线

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-08-30 DOI: 10.1007/s41365-024-01488-0

Ke Li, Hong-Lan Xie, Ya-Nan Fu, Fei-Xiang Wang, Guo-Hao Du, Jian-Feng ji, Biao Deng, Ti-Qiao Xiao

{"title":"Fast X-ray imaging beamline at SSRF","authors":"Ke Li, Hong-Lan Xie, Ya-Nan Fu, Fei-Xiang Wang, Guo-Hao Du, Jian-Feng ji, Biao Deng, Ti-Qiao Xiao","doi":"10.1007/s41365-024-01488-0","DOIUrl":"https://doi.org/10.1007/s41365-024-01488-0","url":null,"abstract":"The fast X-ray imaging beamline (BL16U2) at Shanghai Synchrotron Radiation Facility (SSRF) is a new beamline that provides X-ray micro-imaging capabilities across a wide range of time scales, spanning from 100 ps to μs and ms. This beamline has been specifically designed to facilitate the investigation of a wide range of rapid phenomena, such as the deformation and failure of materials subjected to intense dynamic loads. In addition, it enables the study of high-pressure and high-speed fuel spray processes in automotive engines. The light source of this beamline is a cryogenic permanent magnet undulator (CPMU) that is cooled by liquid nitrogen. This CPMU can generate X-ray photons within an energy range of 8.7–30 keV. The beamline offers two modes of operation: monochromatic beam mode with a liquid nitrogen-cooled double-crystal monochromator (DCM) and pink beam mode with the first crystal of the DCM out of the beam path. Four X-ray imaging methods were implemented in BL16U2: single-pulse ultrafast X-ray imaging, microsecond-resolved X-ray dynamic imaging, millisecond-resolved X-ray dynamic micro-CT, and high-resolution quantitative micro-CT. Furthermore, BL16U2 is equipped with various in situ impact loading systems, such as a split Hopkinson bar system, light gas gun, and fuel spray chamber. Following the completion of the final commissioning in 2021 and subsequent trial operations in 2022, the beamline has been officially available to users from 2023.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"13 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142194411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 dynamics beamline at SSRF SSRF 的动力学光束线

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-08-30 DOI: 10.1007/s41365-024-01467-5

Zhen Liu, Li-Hua Wang, Yong Jiang, Ya-Jun Tong, Hua-Chun Zhu, Te Ji, Min Chen, Zheng Jiang, Xiang-Jun Wei

{"title":"The dynamics beamline at SSRF","authors":"Zhen Liu, Li-Hua Wang, Yong Jiang, Ya-Jun Tong, Hua-Chun Zhu, Te Ji, Min Chen, Zheng Jiang, Xiang-Jun Wei","doi":"10.1007/s41365-024-01467-5","DOIUrl":"https://doi.org/10.1007/s41365-024-01467-5","url":null,"abstract":"The dynamics beamline (D-Line), which combines synchrotron radiation infrared spectroscopy (SR-IR) and energy-dispersive X-ray absorption spectroscopy (ED-XAS), is the first beamline in the world to realize concurrent ED-XAS and SR-IR measurements at the same sample position on a millisecond time-resolved scale. This combined technique is effective for investigating rapid structural changes in atoms, electrons, and molecules in complicated disorder systems, such as those used in physics, chemistry, materials science, and extreme conditions. Moreover, ED-XAS and SR-IR can be used independently in the two branches of the D-Line. The ED-XAS branch is the first ED-XAS beamline in China, which uses a tapered undulator light source and can achieve approximately 2.5 × 1012 photons/s·300 eV BW@7.2 keV at the sample position. An exchangeable polychromator operating in the Bragg-reflection or Laue-transmission configuration is used in different energy ranges to satisfy the requirements for beam size and energy resolution. The focused beam size is approximately 3.5 μm (H) × 21.5 μm (V), and the X-ray energy range is 5–25 keV. Using one- and two-dimensional position-sensitive detectors with frame rates of up to 400 kHz enables time resolutions of tens of microseconds to be realized. Several distinctive techniques, such as the concurrent measurement of in situ ED-XAS and infrared spectroscopy, time-resolved ED-XAS, high-pressure ED-XAS, XMCD, and pump-probe ED-XAS, can be applied to achieve different scientific goals.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"0 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Reliability of DC-link capacitor in pulsed power supply for accelerator magnet 加速器磁体脉冲电源中直流链路电容器的可靠性

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-08-29 DOI: 10.1007/s41365-024-01470-w

Jie Wang, Da-Qing Gao, Wan-Zeng Shen, Hong-Bin Yan, Li-Jun Mao

{"title":"Reliability of DC-link capacitor in pulsed power supply for accelerator magnet","authors":"Jie Wang, Da-Qing Gao, Wan-Zeng Shen, Hong-Bin Yan, Li-Jun Mao","doi":"10.1007/s41365-024-01470-w","DOIUrl":"https://doi.org/10.1007/s41365-024-01470-w","url":null,"abstract":"Capacitors are widely used in pulsed magnet power supplies to reduce ripple voltage, store energy, and decrease power variation. In this study, DC-link capacitors in pulsed power supplies were investigated. By deriving an analytical method for the capacitor current on the H-bridge topology side, the root-mean-square value of the capacitor current was calculated, which helps in selecting the DC-link capacitors. The proposed method solves this problem quickly and with high accuracy. The current reconstruction of the DC-link capacitor is proposed to avoid structural damage in the capacitor’s current measurement, and the capacitor’s hotspot temperature and temperature rise are calculated using the FFT transform. The test results showed that the error between the calculated and measured temperature increases was within 1.5 (^circ hbox {C}). Finally, the lifetime of DC-link capacitors was predicted based on Monte Carlo analysis. The proposed method can evaluate the reliability of DC-link capacitors in a non-isolated switching pulsed power supply for accelerators and is also applicable to film capacitors.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"25 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142194237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Design and high-power testing of offline conditioning cavity for CiADS RFQ high-power coupler 为 CiADS RFQ 高功率耦合器设计离线调节腔并进行高功率测试

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-08-29 DOI: 10.1007/s41365-024-01496-0

Ruo-Xu Wang, Yuan He, Long-Bo Shi, Chen-Xing Li, Zong-Heng Xue, Tian-Cai Jiang, Xian-Bo Xu, Lie-Peng Sun, Zhou-Li Zhang

{"title":"Design and high-power testing of offline conditioning cavity for CiADS RFQ high-power coupler","authors":"Ruo-Xu Wang, Yuan He, Long-Bo Shi, Chen-Xing Li, Zong-Heng Xue, Tian-Cai Jiang, Xian-Bo Xu, Lie-Peng Sun, Zhou-Li Zhang","doi":"10.1007/s41365-024-01496-0","DOIUrl":"https://doi.org/10.1007/s41365-024-01496-0","url":null,"abstract":"To validate the design rationality of the power coupler for the RFQ cavity and minimize cavity contamination, we designed a low-loss offline conditioning cavity and conducted high-power testing. This offline cavity features two coupling ports and two tuners, operating at a frequency of ({162.5},textrm{MHz}) with a tuning range of ({3.2},textrm{MHz}). Adjusting the installation angle of the coupling ring and the insertion depth of the tuner helps minimize cavity losses. We performed electromagnetic structural and multiphysics simulations, revealing a minimal theoretical power loss of ({4.3},{%}). However, when the cavity frequency varied by ({110},textrm{kHz}), theoretical power losses increased to ({10},{%}), necessitating constant tuner adjustments during conditioning. Multiphysics simulations indicated that increased cavity temperature did not affect frequency variation. Upon completion of the offline high-power conditioning platform, we measured the transmission performance, revealing a power loss of ({6.3},{%}), exceeding the theoretical calculation. Conditioning utilized efficient automatic range scanning and standing wave resonant methods. To fully condition the power coupler, a ({15}^circ) phase difference between two standing wave points in the conditioning system was necessary. Notably, the maximum continuous wave power surpassed ({20},textrm{kW}), exceeding the expected target.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"114 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Simulation study of the performance of the Very Large Area gamma-ray Space Telescope 超大面积伽马射线太空望远镜性能模拟研究

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-08-29 DOI: 10.1007/s41365-024-01499-x

Xu Pan, Wei Jiang, Chuan Yue, Shi-Jun Lei, Yu-Xin Cui, Qiang Yuan

{"title":"Simulation study of the performance of the Very Large Area gamma-ray Space Telescope","authors":"Xu Pan, Wei Jiang, Chuan Yue, Shi-Jun Lei, Yu-Xin Cui, Qiang Yuan","doi":"10.1007/s41365-024-01499-x","DOIUrl":"https://doi.org/10.1007/s41365-024-01499-x","url":null,"abstract":"The Very Large Area gamma-ray Space Telescope (VLAST) is a mission concept proposed to detect gamma-ray photons through both Compton scattering and electron–positron pair production mechanisms, thus enabling the detection of photons with energies ranging from MeV to TeV. This project aims to conduct a comprehensive survey of the gamma-ray sky from a low-Earth orbit using an anti-coincidence detector, a tracker detector that also serves as a low-energy calorimeter, and a high-energy imaging calorimeter. We developed a Monte Carlo simulation application of the detector using the GEANT4 toolkit to evaluate the instrument performance, including the effective area, angular resolution, and energy resolution, and explored specific optimizations of the detector configuration. Our simulation-based analysis indicates that the current design of the VLAST is physically feasible, with an acceptance above 10 (mathrm m^2, text{sr}) which is four times larger than that of the Fermi-LAT, an energy resolution better than 2% at 10 GeV, and an angular resolution better than 0.2(^circ) at 10 GeV. The VLAST project promises to make significant contributions to the field of gamma-ray astronomy and enhance our understanding of the cosmos.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"38 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142194235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Superhydrophobic melamine sponge prepared by radiation-induced grafting technology for efficient oil–water separation 利用辐射诱导接枝技术制备超疏水三聚氰胺海绵，实现高效油水分离

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-08-28 DOI: 10.1007/s41365-024-01507-0

Ying Sun, Wen-Rui Wang, Dan-Yi Li, Si-Yi Xu, Lin Lin, Man-Li Lu, Kai Fan, Chen-Yang Xing, Lin-Fan Li, Ji-Hao Li

引用次数: 0

Design of hadronic calorimeter for DarkSHINE experiment 设计用于 DarkSHINE 实验的强子量热计

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-08-28 DOI: 10.1007/s41365-024-01502-5

Zhen Wang, Rui Yuan, Han-Qing Liu, Jing Chen, Xiang Chen, Kim Siang Khaw, Liang Li, Shu Li, Kun Liu, Qi-Bin Liu, Si-Yuan Song, Tong Sun, Xiao-Long Wang, Yu-Feng Wang, Hai-Jun Yang, Jun-Hua Zhang, Yu-Lei Zhang, Zhi-Yu Zhao, Chun-Xiang Zhu, Xu-Liang Zhu, Yi-Fan Zhu

引用次数: 0