This article summarizes the activities and the results of the Globus software evaluation,which was carried out in the framework of the INFN-GRID project.
A compact TM_(020)-mode RF cavity was proposed and studied by KEK and RIKEN for the storage ring of the NanoTerasu facility.However,performance limitations due to accelerating mode leakage into the coaxial slots have ...A compact TM_(020)-mode RF cavity was proposed and studied by KEK and RIKEN for the storage ring of the NanoTerasu facility.However,performance limitations due to accelerating mode leakage into the coaxial slots have been identified.This paper presents an improved TM_(020)-mode cavity design to solve this issue.By employing an elliptical choke,the leakage power can be significantly reduced.Harmful parasitic modes other than the TM_(020)-mode are effectively suppressed using the elliptical choke placed at the magnetic node of the TM_(020)-mode.Through optimization,this improved TM_(020)-mode RF cavity meets the requirements of the Super Tau-Charm Facility(STCF)collider rings with a beam current of up to 2 A.Detailed mechanical design and thermal analysis confirm the feasibility and stability of the improved cavity.展开更多
The spontaneous conversion of muonium to antimuonium is an interesting charged lepton flavor violation phenomenon that offers a sensitive probe for potential new physics and serves as a tool to constrain the parameter...The spontaneous conversion of muonium to antimuonium is an interesting charged lepton flavor violation phenomenon that offers a sensitive probe for potential new physics and serves as a tool to constrain the parameter space beyond the Standard Model.The Muonium-to-Antimuonium Conversion Experiment(MACE)was designed to utilize a high-intensity muon beam,a Michel electron magnetic spectrometer,a positron transport system,and a positron detection system to either discover or constrain this rare process with a conversion probability of O(10^(-13)).This article presents an overview of the theoretical framework and a detailed description of the experimental design for muonium-to-antimuonium conversion.展开更多
粒子平均横动量<pΤ>是相对论核核(A+A)碰撞中重要的实验观测量,反映了软过程强子和热核物质的性质,对其进行研究有助于获取碰撞系统的演化信息。利用位于美国长岛的相对论重离子对撞机(Relativistic Heavy Ion Collider,RHIC)上S...粒子平均横动量<pΤ>是相对论核核(A+A)碰撞中重要的实验观测量,反映了软过程强子和热核物质的性质,对其进行研究有助于获取碰撞系统的演化信息。利用位于美国长岛的相对论重离子对撞机(Relativistic Heavy Ion Collider,RHIC)上STAR实验组(Solenoidal Tracker at RHIC)和位于欧洲日内瓦的大型强子对撞机(Large Hadron Collider,LHC)上ALICE实验组(A Large Ion Collider Experiment)提供的相对论核核碰撞中心快度区末态粒子的实验数据,包括金-金(Au+Au)、铜-铜(Cu+Cu)、铀-铀(U+U)和铅-铅(Pb+Pb)碰撞,应用唯象公式对末态粒子平均横动量<pΤ>随碰撞中心度、粒子质量及碰撞能量的依赖关系进行拟合,均能较好地描述现有实验数据。系统研究证实,末态鉴别粒子平均横动量<pΤ>与碰撞中心度之间的线性关系具有普适性,碰撞中心度是研究粒子平均横动量<pΤ>的优选物理量。同时粒子平均横动量<pΤ>随碰撞中心度的唯象函数公式的拟合参数随碰撞能量满足幂律关系也具有普适性。在同一碰撞能量与系统中,鉴别粒子平均横动量<pΤ>随粒子质量定性上满足线性关系,有少量粒子的数据偏离该线性关系,可能与粒子产生机制的细节有关。同时,在同一碰撞中心度下,鉴别粒子平均横动量<pΤ>对碰撞能量对数的依赖遵循幂律关系且有普适性。展开更多
Developing advanced secondary batteries with low cost and high safety has attracted increasing research interests across the world.In particular,the aqueous zinc-ion battery(AZIB)has been regarded as a promising candi...Developing advanced secondary batteries with low cost and high safety has attracted increasing research interests across the world.In particular,the aqueous zinc-ion battery(AZIB)has been regarded as a promising candidate owing to the high abundance and capacity of Zn metal.Currently,manganese-based and vanadium-based oxides are most common choices for cathode materials used in AZIBs,but they unfortunately show a moderate cell voltage and limited rate performance induced by slow intercalation-extraction kinetics of Zn^(2+)ions.To address these issues,alternative cathode systems with tunable redox potentials and intrinsic fast kinetics have been exploited.In the past few years,conversion-type cathodes of I_(2)and S have become the most illustrative examples to match or even surpass the performance of conventional metal oxide cathodes in AZIBs.Herein,we sum up most recent progress in conversion-type cathodes and focus on novel ideas and concepts in designing/modifying cathodes for AZIBs with high voltage/capacity.Additionally,potential directions and future efforts are tentatively proposed for further development of conversion-type cathodes,aiming to speed up the practical application of AZIBs.展开更多
This study explores how the performance of triboelectric nanogenerators can be enhanced by incorporating Fe_(3)O_(4) nanoparticles into nylon films using a spray coating technique.Five triboelectric nanogenerator prot...This study explores how the performance of triboelectric nanogenerators can be enhanced by incorporating Fe_(3)O_(4) nanoparticles into nylon films using a spray coating technique.Five triboelectric nanogenerator prototypes were created:one with regular nylon and four with nylon/Fe_(3)O_(4) nanocomposites featuring varying nanoparticle densities.The electrical output,measured by open-circuit voltage and short-circuit current,showed significant improvements in the nanocomposite-based triboelectric nanogenerators compared to the nylon-only triboelectric nanogenerator.When a weak magnetic field was applied during nanocomposite preparation,the maximum voltage and current reached 56.3 V and 4.62μA,respectively.Further analysis revealed that the magnetic field during the drying process aligned the magnetic domains,boosting output efficiency.These findings demonstrate the potential of Fe_(3)O_(4) nanoparticles to enhance electrostatic and magnetic interactions in triboelectric nanogenerators,leading to improved energy-harvesting performance.This approach presents a promising strategy for developing high-performance triboelectric nanogenerators for sustainable energy and sensor applications.展开更多
Decays of charmonium into hyperon and antihyperon pairs provide a pristine laboratory for exploring hyperon properties,such as their polarization and decay parameters,and for conducting tests of fundamental symmetries...Decays of charmonium into hyperon and antihyperon pairs provide a pristine laboratory for exploring hyperon properties,such as their polarization and decay parameters,and for conducting tests of fundamental symmetries.This brief review highlights the significant progress made in precise tests of CP symmetry at BESIII using entangled hyperon-antihyperon pairs。展开更多
The^(6)Li+^(89)Y experiment was performed to explore the reaction mechanism induced by a weakly bound nucleus^(6)Li and its cluster configuration.The particle-γcoincidence method was used to identify the different re...The^(6)Li+^(89)Y experiment was performed to explore the reaction mechanism induced by a weakly bound nucleus^(6)Li and its cluster configuration.The particle-γcoincidence method was used to identify the different reaction channels.Theγ-rays coincident with^(3)He/^(3)H indicate that the^(3)H/^(3)He stripping reaction plays a significant role in the formation of Zr/Nb isotopes.The obtained results support the existence of a^(3)He-^(3)H cluster in^(6)Li.Direct and sequential transfer reactions are adequately discussed,and the FRESCO code is used to perform precise finite-range cyclic redundancy check calculations.In the microscopic calculation,direct cluster transfer is more predominant than sequential transfer in^(3)H transfer.However,the direct cluster transfer is of comparable magnitude to the sequential transfer in the^(3)He transfer.展开更多
Driving of the nuclear fusion reaction p+^(11)B3α+8.7 MeV under laboratory conditions by interaction between high-power laser pulses and matter has become a popular field of research,owing to its numerous potential a...Driving of the nuclear fusion reaction p+^(11)B3α+8.7 MeV under laboratory conditions by interaction between high-power laser pulses and matter has become a popular field of research,owing to its numerous potential applications:as an alternative to deuterium-tritium for fusion energy production,astrophysics studies,and alpha-particle generation for medical treatment.One possible scheme for laser-driven p-^(11)B reactions is to direct a beam of laser-accelerated protons onto a boron(B)sample(the so-called“pitcher-catcher”scheme).This technique has been successfully implemented on large high-energy lasers,yielding hundreds of joules per shot at low repetition.We present here a complementary approach,exploiting the high repetition rate of the VEGA III petawatt laser at CLPU(Spain),aiming at accumulating results from many interactions at much lower energy,to provide better control of the parameters and the statistics of the measurements.Despite a moderate energy per pulse,our experiment allowed exploration of the laser-driven fusion process with tens(up to hundreds)of laser shots.The experiment provided a clear signature of the reactions involved and of the fusion products,accumulated over many shots,leading to an improved optimization of the diagnostics for experimental campaigns of this type.In this paper,we discuss the effectiveness of laser-driven p-11B fusion in the pitcher-catcher scheme,at a high repetition rate,addressing the challenges of this experimental scheme and highlighting its critical aspects.Our proposed methodology allows evaluation of the performance of this scheme for laser-driven alpha particle production and can be adapted to high-repetition-rate laser facilities with higher energy and intensity.展开更多
文摘This article summarizes the activities and the results of the Globus software evaluation,which was carried out in the framework of the INFN-GRID project.
基金supported by the“Hundred Talents Program”of the Chinese Academy of Sciences(No.KJ2310007003)the Fundamental Research Funds for the Central Universities(Nos.WK2310000114,KY2310000047,and KY2310000067)+1 种基金the Chinese Academy of Sciences President’s International Fellowship Initiative(No.2025PD0102)Super Tau-Charm Facility key technology research project。
文摘A compact TM_(020)-mode RF cavity was proposed and studied by KEK and RIKEN for the storage ring of the NanoTerasu facility.However,performance limitations due to accelerating mode leakage into the coaxial slots have been identified.This paper presents an improved TM_(020)-mode cavity design to solve this issue.By employing an elliptical choke,the leakage power can be significantly reduced.Harmful parasitic modes other than the TM_(020)-mode are effectively suppressed using the elliptical choke placed at the magnetic node of the TM_(020)-mode.Through optimization,this improved TM_(020)-mode RF cavity meets the requirements of the Super Tau-Charm Facility(STCF)collider rings with a beam current of up to 2 A.Detailed mechanical design and thermal analysis confirm the feasibility and stability of the improved cavity.
基金supported by National Natural Science Foundation of China(Nos.12075326,11535014,11975017,12475191,11905092,12105132 and 12175039)Guangdong Basic and Applied Basic Research Foundation(No.2025A1515010669)+7 种基金Natural Science Foundation of Guangzhou(No.2024A04J6243)Fundamental Research Funds for the Central Universities(23xkjc017)in Sun Yat-sen UniversityBasic Research Conditions and Major Scientific Instrument and Equipment Research and Development Projects of the Ministry of Science and Technology(No.2022YFF0705602)the State Key Laboratory of Particle Detection and Electronics(SKLPDE-ZZ-202412)Natural Science Foundation of Shandong Province(No.2023HWYQ-010)the“Fundamental Research Funds for the Central Universities”at Southeast Universitythe National Development and Reform Commission of China(Large Research Infrastructures of 12th Five-Year Plan:China initiative Accelerator Driven System)(No.2017-000052-75-01-000590)Innovation Training Program for bachelor students in Sun Yat-sen University。
文摘The spontaneous conversion of muonium to antimuonium is an interesting charged lepton flavor violation phenomenon that offers a sensitive probe for potential new physics and serves as a tool to constrain the parameter space beyond the Standard Model.The Muonium-to-Antimuonium Conversion Experiment(MACE)was designed to utilize a high-intensity muon beam,a Michel electron magnetic spectrometer,a positron transport system,and a positron detection system to either discover or constrain this rare process with a conversion probability of O(10^(-13)).This article presents an overview of the theoretical framework and a detailed description of the experimental design for muonium-to-antimuonium conversion.
文摘粒子平均横动量<pΤ>是相对论核核(A+A)碰撞中重要的实验观测量,反映了软过程强子和热核物质的性质,对其进行研究有助于获取碰撞系统的演化信息。利用位于美国长岛的相对论重离子对撞机(Relativistic Heavy Ion Collider,RHIC)上STAR实验组(Solenoidal Tracker at RHIC)和位于欧洲日内瓦的大型强子对撞机(Large Hadron Collider,LHC)上ALICE实验组(A Large Ion Collider Experiment)提供的相对论核核碰撞中心快度区末态粒子的实验数据,包括金-金(Au+Au)、铜-铜(Cu+Cu)、铀-铀(U+U)和铅-铅(Pb+Pb)碰撞,应用唯象公式对末态粒子平均横动量<pΤ>随碰撞中心度、粒子质量及碰撞能量的依赖关系进行拟合,均能较好地描述现有实验数据。系统研究证实,末态鉴别粒子平均横动量<pΤ>与碰撞中心度之间的线性关系具有普适性,碰撞中心度是研究粒子平均横动量<pΤ>的优选物理量。同时粒子平均横动量<pΤ>随碰撞中心度的唯象函数公式的拟合参数随碰撞能量满足幂律关系也具有普适性。在同一碰撞能量与系统中,鉴别粒子平均横动量<pΤ>随粒子质量定性上满足线性关系,有少量粒子的数据偏离该线性关系,可能与粒子产生机制的细节有关。同时,在同一碰撞中心度下,鉴别粒子平均横动量<pΤ>对碰撞能量对数的依赖遵循幂律关系且有普适性。
基金the financial support from NSFC(21975027)NSFCMAECI(51861135202).
文摘Developing advanced secondary batteries with low cost and high safety has attracted increasing research interests across the world.In particular,the aqueous zinc-ion battery(AZIB)has been regarded as a promising candidate owing to the high abundance and capacity of Zn metal.Currently,manganese-based and vanadium-based oxides are most common choices for cathode materials used in AZIBs,but they unfortunately show a moderate cell voltage and limited rate performance induced by slow intercalation-extraction kinetics of Zn^(2+)ions.To address these issues,alternative cathode systems with tunable redox potentials and intrinsic fast kinetics have been exploited.In the past few years,conversion-type cathodes of I_(2)and S have become the most illustrative examples to match or even surpass the performance of conventional metal oxide cathodes in AZIBs.Herein,we sum up most recent progress in conversion-type cathodes and focus on novel ideas and concepts in designing/modifying cathodes for AZIBs with high voltage/capacity.Additionally,potential directions and future efforts are tentatively proposed for further development of conversion-type cathodes,aiming to speed up the practical application of AZIBs.
文摘This study explores how the performance of triboelectric nanogenerators can be enhanced by incorporating Fe_(3)O_(4) nanoparticles into nylon films using a spray coating technique.Five triboelectric nanogenerator prototypes were created:one with regular nylon and four with nylon/Fe_(3)O_(4) nanocomposites featuring varying nanoparticle densities.The electrical output,measured by open-circuit voltage and short-circuit current,showed significant improvements in the nanocomposite-based triboelectric nanogenerators compared to the nylon-only triboelectric nanogenerator.When a weak magnetic field was applied during nanocomposite preparation,the maximum voltage and current reached 56.3 V and 4.62μA,respectively.Further analysis revealed that the magnetic field during the drying process aligned the magnetic domains,boosting output efficiency.These findings demonstrate the potential of Fe_(3)O_(4) nanoparticles to enhance electrostatic and magnetic interactions in triboelectric nanogenerators,leading to improved energy-harvesting performance.This approach presents a promising strategy for developing high-performance triboelectric nanogenerators for sustainable energy and sensor applications.
基金supported by the National Natural Science Foundation of China(Grant No.12225509),the National Natural Science Foundation of China(Grant No.12247101)the Polish National Science Centre(Grant No.2024/53/B/ST2/00975)+2 种基金the Fundamental Research Funds for the Central Universities(Grant No.lzujbky-2024-jdzx06)the Natural Science Foundation of Gansu Province(Grant No.22JR5RA389)the‘111 Center’under Grant No.B20063。
文摘Decays of charmonium into hyperon and antihyperon pairs provide a pristine laboratory for exploring hyperon properties,such as their polarization and decay parameters,and for conducting tests of fundamental symmetries.This brief review highlights the significant progress made in precise tests of CP symmetry at BESIII using entangled hyperon-antihyperon pairs。
基金supported by the National Natural Science Foundation of China under Grant Nos.U2167204,11975040,111 Center(B20065)Brazilian authors were supported in part by local funding agencies CNPq+10 种基金FAPERJCAPESand INCT-FNA(Instituto Nacional de Ciência e Tecnologia,Física Nuclear e Aplicacoes)Research Project No.464898/2014-5Marco Siciliano's work was partially supported by the US Department of EnergyOffice of Scienceand Office of Nuclear Physics(DE-AC02-06CH11357)supported by Nuclear Energy Development and Research Project No.HNKF202224(28)Ling Chuang Research Project of the China National Nuclear Corporation No.CNNCLCKY-2023 and No.20221024000072F6-0002-7Guangdong Key Research and Development Program No.2020B040420005Guangdong Basic and Applied Basic Research Foundation No.2021B1515120027。
文摘The^(6)Li+^(89)Y experiment was performed to explore the reaction mechanism induced by a weakly bound nucleus^(6)Li and its cluster configuration.The particle-γcoincidence method was used to identify the different reaction channels.Theγ-rays coincident with^(3)He/^(3)H indicate that the^(3)H/^(3)He stripping reaction plays a significant role in the formation of Zr/Nb isotopes.The obtained results support the existence of a^(3)He-^(3)H cluster in^(6)Li.Direct and sequential transfer reactions are adequately discussed,and the FRESCO code is used to perform precise finite-range cyclic redundancy check calculations.In the microscopic calculation,direct cluster transfer is more predominant than sequential transfer in^(3)H transfer.However,the direct cluster transfer is of comparable magnitude to the sequential transfer in the^(3)He transfer.
基金funded by the European Union via the Euratom Research and Training Program(Grant Agreement No.101052200-EUROfusion)funding from LASERLAB-EUROPE(Grant Agreement No.871124,European Union’s Horizon 2020 Research and Innovation Program)+5 种基金supported in part by the United States Department of Energy under Grant No.DE-FG02-93ER40773We also acknowledge support from Grant No.PID2021-125389OA-I00 funded by MCIN/AEI/10.13039/501100011033/FEDER,UEby“ERDF A Way of Making Europe”by the European Union and Unidad de Investigación Consolidada of Junta de Castilla y León UIC 167supported in part by the National Natural Science Foundation of China under Grant No.12375125the Fundamental Research Funds for the Central Universitiesthe support of the Czech Science Foundation through Grant No.GACR24-11398S.
文摘Driving of the nuclear fusion reaction p+^(11)B3α+8.7 MeV under laboratory conditions by interaction between high-power laser pulses and matter has become a popular field of research,owing to its numerous potential applications:as an alternative to deuterium-tritium for fusion energy production,astrophysics studies,and alpha-particle generation for medical treatment.One possible scheme for laser-driven p-^(11)B reactions is to direct a beam of laser-accelerated protons onto a boron(B)sample(the so-called“pitcher-catcher”scheme).This technique has been successfully implemented on large high-energy lasers,yielding hundreds of joules per shot at low repetition.We present here a complementary approach,exploiting the high repetition rate of the VEGA III petawatt laser at CLPU(Spain),aiming at accumulating results from many interactions at much lower energy,to provide better control of the parameters and the statistics of the measurements.Despite a moderate energy per pulse,our experiment allowed exploration of the laser-driven fusion process with tens(up to hundreds)of laser shots.The experiment provided a clear signature of the reactions involved and of the fusion products,accumulated over many shots,leading to an improved optimization of the diagnostics for experimental campaigns of this type.In this paper,we discuss the effectiveness of laser-driven p-11B fusion in the pitcher-catcher scheme,at a high repetition rate,addressing the challenges of this experimental scheme and highlighting its critical aspects.Our proposed methodology allows evaluation of the performance of this scheme for laser-driven alpha particle production and can be adapted to high-repetition-rate laser facilities with higher energy and intensity.
