Nuclear Science and Techniques最新文献_第4页

Optimizing near-carbon-free nuclear energy systems: advances in reactor operation digital twin through hybrid machine learning algorithms for parameter identification and state estimation 优化近乎无碳的核能系统：通过混合机器学习算法进行参数识别和状态估计，推动反应堆运行数字孪生技术的发展

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-07-24 DOI: 10.1007/s41365-024-01494-2

Li-Zhan Hong, He-Lin Gong, Hong-Jun Ji, Jia-Liang Lu, Han Li, Qing Li

{"title":"Optimizing near-carbon-free nuclear energy systems: advances in reactor operation digital twin through hybrid machine learning algorithms for parameter identification and state estimation","authors":"Li-Zhan Hong, He-Lin Gong, Hong-Jun Ji, Jia-Liang Lu, Han Li, Qing Li","doi":"10.1007/s41365-024-01494-2","DOIUrl":"https://doi.org/10.1007/s41365-024-01494-2","url":null,"abstract":"Accurate and efficient online parameter identification and state estimation are crucial for leveraging digital twin simulations to optimize the operation of near-carbon-free nuclear energy systems. In previous studies, we developed a reactor operation digital twin (RODT). However, non-differentiabilities and discontinuities arise when employing machine learning-based surrogate forward models, challenging traditional gradient-based inverse methods and their variants. This study investigated deterministic and metaheuristic algorithms and developed hybrid algorithms to address these issues. An efficient modular RODT software framework that incorporates these methods into its post-evaluation module is presented for comprehensive comparison. The methods were rigorously assessed based on convergence profiles, stability with respect to noise, and computational performance. The numerical results show that the hybrid KNNLHS algorithm excels in real-time online applications, balancing accuracy and efficiency with a prediction error rate of only 1% and processing times of less than 0.1 s. Contrastingly, algorithms such as FSA, DE, and ADE, although slightly slower (approximately 1 s), demonstrated higher accuracy with a 0.3% relative (L_2) error, which advances RODT methodologies to harness machine learning and system modeling for improved reactor monitoring, systematic diagnosis of off-normal events, and lifetime management strategies. The developed modular software and novel optimization methods presented offer pathways to realize the full potential of RODT for transforming energy engineering practices.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"37 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781022","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

FPGA implementation of 500-MHz high-count-rate high-time-resolution real-time digital neutron-gamma discrimination for fast liquid detectors 用于快速液体探测器的 500-MHz 高计数率高时间分辨率实时数字中子伽马判别的 FPGA 实现

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-07-24 DOI: 10.1007/s41365-024-01441-1

Hui-Yin Shen, Jing-Long Zhang, Jie Zhang, Jian-Hang Zhou

引用次数: 0

Determining beam transverse absolute position by triangulation of multi-electrode signal phase differences 利用多电极信号相位差三角测量法确定光束横向绝对位置

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-07-23 DOI: 10.1007/s41365-024-01498-y

Xing Yang, Hong-Shuang Wang, Yi-Mei Zhou, Yong-Bin Leng

{"title":"Determining beam transverse absolute position by triangulation of multi-electrode signal phase differences","authors":"Xing Yang, Hong-Shuang Wang, Yi-Mei Zhou, Yong-Bin Leng","doi":"10.1007/s41365-024-01498-y","DOIUrl":"https://doi.org/10.1007/s41365-024-01498-y","url":null,"abstract":"Accurate measurement of the transverse position of a beam is crucial in particle accelerators because it plays a key role in determining the beam parameters. Existing methods for beam-position measurement rely on the detection of image currents induced on electrodes or narrow-band wake field induced by a beam passing through a cavity-type structure. However, these methods have limitations. The indirect measurement of multiple parameters is computationally complex, requiring external calibration to determine the system parameters in advance. Furthermore, the utilization of the beam signal information is incomplete. Hence, this study proposes a novel method for measuring the absolute electron beam transverse position. By utilizing the geometric relationship between the center position of the measured electron beam and multiple detection electrodes and by analyzing the differences in the arrival times of the beam signals detected by these electrodes, the absolute transverse position of the electron beam crossing the electrode plane can be calculated. This method features absolute position measurement, a position sensitivity coefficient independent of vacuum chamber apertures, and no requirement for a symmetrical detector electrode layout. The feasibility of this method is validated through numerical simulations and beam experiments.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"55 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781023","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 construction of charged-particle telescope array for study of exotic nuclear clustering structure 设计和建造用于研究奇异核团聚结构的带电粒子望远镜阵列

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-07-23 DOI: 10.1007/s41365-024-01503-4

Zheng-Li Liao, Xi-Guang Cao, Yu-Xuan Yang, Chang-Bo Fu, Xian-Gai Deng

{"title":"Design and construction of charged-particle telescope array for study of exotic nuclear clustering structure","authors":"Zheng-Li Liao, Xi-Guang Cao, Yu-Xuan Yang, Chang-Bo Fu, Xian-Gai Deng","doi":"10.1007/s41365-024-01503-4","DOIUrl":"https://doi.org/10.1007/s41365-024-01503-4","url":null,"abstract":"The exploration of exotic shapes and properties of atomic nuclei, e.g., (alpha) cluster and toroidal shape, is a fascinating field in nuclear physics. To study the decay of these nuclei, a novel detector aimed at detecting multiple (alpha)-particle events was designed and constructed. The detector comprises two layers of double-sided silicon strip detectors (DSSD) and a cesium iodide scintillator array coupled with silicon photomultipliers array as light sensors, which has the advantages of their small size, fast response, and large dynamic range. DSSDs coupled with cesium iodide crystal arrays are used to distinguish multiple (alpha) hits. The detector array has a compact and integrated design that can be adapted to different experimental conditions. The detector array was simulated using Geant4, and the excitation energy spectra of some (alpha)-clustering nuclei were reconstructed to demonstrate the performance. The simulation results show that the detector array has excellent angular and energy resolutions, enabling effective reconstruction of the nuclear excited state by multiple (alpha) particle events. This detector offers a new and powerful tool for nuclear physics experiments and has the potential to discover interesting physical phenomena related to exotic nuclear structures and their decay mechanisms.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"66 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781212","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

Spatial- and spin-resolution ARPES and magnetism beamline at SSRF 位于 SSRF 的空间和自旋分辨率 ARPES 和磁性光束线

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-07-21 DOI: 10.1007/s41365-024-01484-4

Fang-Yuan Zhu, Jie-Feng Cao, Xiang-Yu Meng, Jun-Qin Li, Rui Yu, Ya-Mei Wang, Shan Qiao, Bo Zhao, Ming-Zhu Zhang, Zhong-Kai Liu, Mei-Xiao Wang, Yong Wang, Ren-Zhong Tai

引用次数: 0

Construction and performance test of charged particle detector array for MATE 为 MATE 建造带电粒子探测器阵列并进行性能测试

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-07-21 DOI: 10.1007/s41365-024-01500-7

Xiao-Bin Li, Long-Hui Ru, Zhi-Chao Zhang, Bing-Feng Lv, Ning-Tao Zhang, Jin-Long Zhang, Chen-Gui Lu, Bing-Shui Gao, Jun-Bing Ma, Fu-Shuai Shi, Satoru Terashima, Xiao-Dong Xu, Zhen Bai, Shi-Wei Xu, Yan-Yun Yang, Hooi-Jin Ong, Xiao-Dong Tang

{"title":"Construction and performance test of charged particle detector array for MATE","authors":"Xiao-Bin Li, Long-Hui Ru, Zhi-Chao Zhang, Bing-Feng Lv, Ning-Tao Zhang, Jin-Long Zhang, Chen-Gui Lu, Bing-Shui Gao, Jun-Bing Ma, Fu-Shuai Shi, Satoru Terashima, Xiao-Dong Xu, Zhen Bai, Shi-Wei Xu, Yan-Yun Yang, Hooi-Jin Ong, Xiao-Dong Tang","doi":"10.1007/s41365-024-01500-7","DOIUrl":"https://doi.org/10.1007/s41365-024-01500-7","url":null,"abstract":"A charged particle array named MATE-PA, which serves as an auxiliary detector system for a Multi-purpose Active-target Time projection chamber used in nuclear astrophysical and exotic beam Experiments (MATE), was constructed. The array comprised of 20 single-sided strip-silicon detectors covering approximately 10% of the solid angle. The detectors facilitated the detection of reaction-induced charged particles that penetrate the active volume of the MATE. The performance of MATE-PA has been experimentally studied using an alpha source and a 36-MeV (^{14})N beam injected into the MATE chamber on the radioactive ion beam line in Lanzhou (RIBLL). The chamber was filled with a gas mixture of 95(%) (^4)He and 5(%) CO(_2) at a pressure of 500 mbar. The results indicated good separation of light-charged particles using the forward double-layer silicon detectors of MATE-PA. The energy resolution of the Si detectors was deduced to be approximately 1(%) ((sigma)) for an energy loss of approximately 10 MeV caused by the (alpha) particles. The inclusion of MATE-PA improves particle identification and increases the dynamic range of the kinetic energy of charged particles, particularly that of the (alpha) particles, up to approximately 15 MeV.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"30 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141739768","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

Effects of interstitial cluster mobility on dislocation loops evolution under irradiation of austenitic steel 间隙簇迁移率对奥氏体钢辐照下位错环演变的影响

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-07-21 DOI: 10.1007/s41365-024-01493-3

Xin-Hua Yan, Lu Sun, Du Zhou, Teng Xie, Chang Peng, Ye-Xin Yang, Li Chen, Zhen-Feng Tong

引用次数: 0

Nucleosynthesis in the little bang 小爆炸中的核合成

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-07-19 DOI: 10.1007/s41365-024-01477-3

Marcus Bleicher

引用次数: 0

Simulation and reconstruction of particle trajectories in the CEPC drift chamber 模拟和重建 CEPC 漂浮舱中的粒子轨迹

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-07-19 DOI: 10.1007/s41365-024-01497-z

Meng-Yao Liu, Wei-Dong Li, Xing-Tao Huang, Yao Zhang, Tao Lin, Ye Yuan

引用次数: 0

Systematic study of the synthesis of heavy and superheavy nuclei in 48Ca-induced fusion-evaporation reactions 对 48Ca 引发的聚变-蒸发反应中重核和超重核合成的系统研究

IF 2.8 1区物理与天体物理

Nuclear Science and Techniques Pub Date : 2024-07-13 DOI: 10.1007/s41365-024-01483-5

Shi-Hao Zhu, Tian-Liang Zhao, Xiao-Jun Bao

{"title":"Systematic study of the synthesis of heavy and superheavy nuclei in 48Ca-induced fusion-evaporation reactions","authors":"Shi-Hao Zhu, Tian-Liang Zhao, Xiao-Jun Bao","doi":"10.1007/s41365-024-01483-5","DOIUrl":"https://doi.org/10.1007/s41365-024-01483-5","url":null,"abstract":"We systematically studied the evaporation residue cross sections of (^{48}hbox {Ca})-induced reactions on lanthanide and actinide target nuclei under the Dinuclear System (DNS) model framework to check the reliability and applicability of the model. To produce new proton-rich Fl and Lv isotopes through hot fusion reactions in the superheavy element region with (Zge 104), we utilized the reactions (^{48}hbox {Ca}+^{236,238,239}hbox {Pu}) and (^{48}hbox {Ca}+^{242,243,244,250}hbox {Cm}). However, owing to the detection limit of available equipment (0.1 pb), only (^{283}hbox {Fl}) and (^{287-289}hbox {Lv}), which have the maximum evaporation residue cross section values of 0.149, 0.130, 9.522, and 0.309 pb, respectively, can be produced. Furthermore, to produce neutron-deficient isotopes of actinides near the proton drip line with (Z=93-100), we attempted to generate the new isotopes ((^{224-227}hbox {Pu}), (^{228-232,237}hbox {Cm})) using the reactions (^{48}hbox {Ca}+^{180, 182, 183}hbox {W}) and (^{48}hbox {Ca}+^{184, 186, 187, 192}hbox {Os}). The maximum evaporation residue cross section values are 0.07, 0.06, 0.26, and 0.30 nb for the former set of reactions, and 1.96 pb, 5.73 pb, 12.16 pb, 19.39 pb, 54.79 pb, and 6.45 nb for the latter, respectively. These results are expected to provide new information for the future synthesis of unknown neutron-deficient isotopes.","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"6 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610429","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