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Exclusive π^(0) production at EIC of China within handbag approach

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Chinese Physics C 2022年第12期46卷 50-57页

作者： S.v.Goloskokov Ya-Ping Xie Xurong Chen Laboratory of Theoretical Physics Joint Institute for Nuclear ResearchDubna 141980MoscowRussia Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Institute of Quantum Matter South China Normal UniversityGuangzhou 510006China

Exclusive π^(0) electroproduction is analyzed within the handbag approach based on Generalized Parton Distribution(GPDs)*** consider the leading-twist contribution together with the transversity *** is shown that the transversity GPDs H_(T) and E_(T) are essential in the description of the π^(0) cross *** for the future Electron-ion Collider of China(EicC)energy range are *** is found that transversity dominanceσ_(T)>>σ_(L),observed at low energies,is valid up to the EicC energy range.

关键词： general parton distributions nucleon structure deep virtual meson production

Hydrogen ion Implantation Induced Cutting Behavior variation in Plunge Cutting of the Monocrystalline Silicon

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Nanomanufacturing and Metrology 2021年第4期4卷 209-215页

作者： Zejia Zhao E.v.Jelenkovic Gaobo Xiao Zhuoxuan Zhuang Suet To Institute of Semiconductor Manufacturing Research College of Mechatronics and Control EngineeringShenzhen UniversityNan-hai Ave 3688Shenzhen 518060GuangdongPeople’s Republic of China State Key Laboratory of Ultra-precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHung HornKowloonHong Kong SARPeople’s Republic of China Zhuhai Bojay Electronics Co. Ltd10 Futian RdXiangzhou DistrictZhuhai.GuangdongPeople’s Republic of China

In this study,surface modification of monocrystalline silicon with two doses of hydrogen ion implantation and the plunge cutting process were conducted to explore the influence of hydrogen ions on the cutting behavior of *** results show that ion implantation is capable of deteriorating or improving the machinability of silicon,depending on the implantation *** cleavages and a reduction of critical depth of cut(CDoC)were observed for the silicon with a low implantation dose in the cutting direction ofin comparison to bare silicon,while no cleavage and an increase of CDoC were achieved after implantation with a high dose in the same cutting ***,the ductile cutting and thrust forces of the silicon with the low dose are larger than the bare silicon,but the forces are significantly reduced for the silicon after the high dose of *** variation of the cutting forces is due to the different required stresses to overcome ductile and fracture deformation of silicon.

关键词： Hydrogen ion implantation Plunge cutting Silicon Critical depth of cut Cutting forces

Effectiveness of Radiofrequency Inductively Coupled Plasma Sources for Space Propulsion

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高电压技术 2013年第9期39卷 2077-2088页

作者： v. A. Riaby P E. Masherov v. A. Obukhov v. P. Savinov Research Institute of Applied Mechanics and Electrodynamics of the Moscow Aviation Institute National Research University 5 Leningrad Rd. Moscow 125080 Russia Physical Department Moscow State University named alter M. V. Lomonosov Lenin Hills Moscow 119991 Russia

Evolution of geometric forms of antenna coils for radiofrequency(RF)inductively coupled plasma(ICP)sources is *** effectiveness of flat ICPSs generating plasma"tablet"is *** effective are ICPSs using antenna coils enhanced with ferromagnetic cores(FMICPS).It is found that the design of flat ICPSs is simpler and more convenient for the arrangement of plasma diagnostics in comparison with ICPSs of other *** flat FMICPS models of different diameters ranging from 10 cm to 100cm are *** are given for development engineers dealing with ICPS devices in general and with radio frequency ion thrusters(RITs)in particular.

关键词：电感耦合等离子体等离子体源空间推进射频等离子体诊断几何形式 ICPS 离子推进器

Formation of Multicharged Metal ions in vacuum Arc Plasma Heated by Gyrotron Radiation

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Plasma Science and Technology 2011年第5期13卷 596-599页

作者： G. Yu. YUSHKOv K. P. SAvKIN A. G. NIKOLAEv E. M. OKS A.v. vODOPYANOv I. v. IZOTOv D. A. MANSFELD High Current Electronics Institute Siberian Branch of Russian Academy of Sciences Tomsk 634055 Russia Institute of Applied Physics Russian Academy of Science Nizhniy Novgorod 603950 Russia

A new method for the generation of high charged state metal ion beams is developed. This method is based on microwave heating of vacuum arc plasma in a magnetic trap under electron cyclotron resonance （ECR） conditions. Two gyrotrons for plasma heating were used, which were with the following parameters. The first is with a wave frequency of 37.5 GHz, a pulse duration of 1 ms and power of 100 kW, another is with 75 GHz, 0.15 ms and 400 kW. Two different magnetic traps were considered for vacuum arc plasma confinement. The first one is a simple mirror trap. Such system was already investigated and could provide high charge state ions. The second trap was with a cusp magnetic field configuration with native ＂minimum-B＂ field structure. Two different ways of metal plasma injection into the magnetic trap were used. The first one is an axial injection from an arc source located out of the trap, and the second is a radial injection from four arc sources mounted at the center of the trap. Both traps provide up to 200 eMA of ion beam current for platinum ions with highest charge state 10＋. ion beams were successfully extracted from the plasma and accelerated by a voltage of up to 20 kv.

关键词： ion source ECR heating vacuum arc multicharged ions

Fully Kinetic, Electromagnetic Particle-in-Cell Simulations of Plasma Microturbulence

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Communications in Computational Physics 2007年第4期2卷 684-722页

作者： J.L.v.Lewandowski L.E.Zakharov Plasma Physics Laboratory Princeton UniversityP.O.Box 451PrincetonNJ 08543USA.

A novel numerical method,based on physical intuition,for particle-in-cell simulations of electromagnetic plasma microturbulence with fully kinetic ion and electron dynamics is *** method is based on the observation that,for lowfrequency modes of interest[ω/ω_(ci)≪1,ωis the typical mode frequency andωci is the ion cyclotron frequency]the impact of particles that have velocities larger than the resonant velocity,v^(r)∼ω/k_(||)(k_(||) is the typical parallel wavenumber)is negligibly small(this is especially true for the electrons).Therefore it is natural to analytically segregate the electron response into an adiabatic response and a nonadiabatic response and to numerically resolve only the latter:this approach is termed the splitting ***,the exact separation between adiabatic and nonadiabatic responses implies that a set of coupled,nonlinear elliptic equations has to be solved;in this paper an iterative technique based on the multigrid method is used to resolve the apparent numerical *** is shown that the splitting scheme allows for clean,noise-free simulations of electromagnetic drift waves and ion temperature gradient(ITG)*** is also shown that the advantage of noise-free kinetic simulations translates into better energy conservation properties.

关键词： Plasma micro-turbulence particle-in-cell simulation multigrid solver.

The Effect of Bio-inspired Co-electrolytes for Enhancement of Electrochemical Properties of Supercapacitors

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Energy & Environmental Materials 2020年第3期3卷 429-435页

作者： Pravin.H.Wadekar Rahul.v.Khose Dattatray.A.Pethsangave Surajit.Some Department of Dyestuff Technology Institute of Chemical TechnologyMatungaMumbai 400019India

In the current work,we are introducing the concept of co-electrolyte in the aqueous ***,we have prepared the bio-inspired co-electrolyte of choline chloride and potassium hydroxide,which in situ produces choline hydroxide and potassium chloride by the ion-exchange *** resultant co-electrolyte(RCE)solution exhibits decent electrochemical property than its parental salts,that is,potassium hydroxide,choline *** RCE further used to enhance the energy storage ability of reduced graphene oxide(RGO).The material exhibits maximum specific capacitance 394 F g-1 and higher energy density 44.3 Wh kg-1 at the current density of 1 A g-1 in the presence of co-electrolyte,which is higher as compared to its preceding salts as an ***,the material exhibits lower equivalent series resistance,that is,0.3Ωin *** concept can be considered as future development in the field of energy storage materials.

关键词： choline chloride co-electrolyte reduced graphene oxide supercapacitor

Determination of the major geochemical processes of groundwater along the Cretaceous-Tertiary boundary of Trichinopoly,Tamilnadu,India

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Acta Geochimica 2020年第5期39卷 760-781页

作者： N.Devaraj S.Chidambaram U.vasudevan K.Pradeep M.Nepolian M.v.Prasanna v.S.Adithya R.Thilagavathi C.Thivya Banajarani Panda Department of Earth Sciences Annamalai UniversityChidambaramTamilnadu 608002India Water Research Centre Kuwait Institute for Scientific ResearchKuwait CityKuwait Department of Applied Geology Faculty of Engineering and ScienceCurtin University Malaysia.CDT 25098009 MiriSarawakMalaysia

The hydrogeochemical variations in groundwater are mainly influenced by lithology,residence time of water in the aquifer matrix,and anthropogenic *** study was focused on the geochemical variations of groundwater in different lithological units(Archaean,Cretaceous,Tertiary,and Quaternary)by understanding the major factors governing the geochemical variations in each *** 71 groundwater samples were collected from these rock types,namely,Archaean(14),Cretaceous(37),Tertiary(11),Quaternary(9).The collected samples were measured for major ions and they were used for preparation of standard geochemical plots and ionic *** analysis and factor score were used to identify the major factors controlling the hydrochemistry and their spatial distribution in the study *** addition,geochemical model,WATEQ 4 F was used to determine the saturation condition of carbonate and sulphate minerals in the ***–Cl and mixed Ca–Na–HCO3 were the dominant hydrochemical facies irrespective of lithological *** overall interpretation of geochemical data revealed that leaching of secondary salts,weathering and ion exchange reaction along the groundwater flow path through various lithological units,and anthropogenic influence from domestic sewages and agricultural activities constitute the major geochemical processes in the study ***,this study brings out the multiple hydrogeochemical process in the complex geological terrain along the Cretaceous-Tertiary boundary.

关键词： Groundwater Geochemical process Major ions Correlation Factor analysis

Electrical programmable multilevel nonvolatile photonic random-access memory

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Light(Science & Applications) 2023年第11期12卷 2325-2334页

作者： Jiawei Meng Yaliang Gui Behrouz Movahhed Nouri Xiaoxuan Ma Yifei Zhang Cosmin-Constantin popescu Myungkoo Kang Mario Miscuglio Nicola Peserico Kathleen Richardson Juejun Hu Hamed Dalir volker J.Sorger Department of Electrical and Computer Engineering George Washington UniversityWashington DC 20052USA Florida Semiconductor Institute University of FloridaGainesvilleFL 32603USA Department of Electrical and Computer Engineering University of FloridaGainesvilleFL 32603USA Department of Materials Science&Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA CREOL The College of Optics&PhotonicsUniversity of Central FloridaOrlandoFL 32816USA

Photonic Random-Access Memories(P-RAM)are an essential component for the on-chip non-von Neumann photonic computing by eliminating optoelectronic conversion losses in data *** Phase-Change Materials(PCMs)have been showed multilevel memory capability,but demonstrations still yield relatively high optical loss and require cumbersome WRITE-ERASE approaches increasing power consumption and system package *** we demonstrate a multistate electrically programmed low-loss nonvolatile photonic memory based on a broadband transparent phase-change material(Ge2Sb2Se5,GSSe)with ultralow absorption in the amorphous state.A zero-staticpower and electrically programmed multi-bit P-RAM is demonstrated on a silicon-on-insulator platform,featuring efficient amplitude modulation up to 0.2 dB/μm and an ultralow insertion loss of total 0.12 dB for a 4-bit memory showing a 100×improved signal to loss ratio compared to other phase-change-materials based photonic *** further optimize the positioning of dual microheaters validating performance *** we demonstrate a half-a-million cyclability test showcasing the robust approach of this material and ***-loss photonic retention-of-state adds a key feature for photonic functional and programmable circuits impacting many applications including neural networks,LiDAR,and sensors for example.

关键词： retention random eliminating

EPR and Magnetic Susceptibility Studies of Cr^(3+) ions in the 70TeO_2·25B_2O_3·5PbO Glass Matrix

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Journal of Materials Science & Technology 1997年第5期13卷 374-378页

作者： Peteanu M. Simon v. Muresan N. Ardelean I. Filip S. Faculty of Physics Babes-Bolyai University 3400 Cluj-Napoca Romania Dept. of Physics University of Oradea 3700 Oradea Romania

By using EPR and magnetic susceptibility measurements, the Cr ion distribution in the xCr2O3.(1-x)[70TeO2·25B2O3·5PbO] glasses with 0＜x≤20 mol% was studied. EPR investigation evidencedthe presence of Cr3+ ions in agreement with the experimentally obtained atomic magnetic moment values. For concentrations x≤3 mol%, the isolated Cr3+ ions coexist with those coupledby dipole-dipole interactions. For x＞3 mol%, the Cr3+ ions participate in superexchange interactions and are predominantly antiferromagnetically coupled.

关键词： PbO ions in the 70TeO2 Glass Matrix EPR and Magnetic Susceptibility Studies of Cr Cr