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CERN的ISOLDE装置上的ECR离子剥离器Phoenix的最新进展(英文)

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Chinese Physics C 2007年第S1期31卷 216-218页

作者： M.Marie-Jeanne P.Delahaye CERN GenevaCH-1211Switzerland LPSCGrenobleF-38000France Université Joseph FourierGrenobleF-38000France CERN GenevaCH-1211Switzerland

At ISOLDE (CERN),an on-line test bench is dedicated to charge breeding experiments with a 14GHz Phoenix ion source,for the investigation of the 1+→n+ scenario at next generation ISOL-type *** year,various technical developments have been undertaken for intensifying the tests of the on- line performances of the booster with a high diversity of stable and radioactive ion *** contribution will present an overview of the latest developments,the current challenges,and some perspectives for the future use of the Phoenix booster for physics experiments at ISOLDE.

关键词： ion sources charge breeding mass and energy spectrometer

Does CDW Physics Allow Ultra Fast Transitions, and Current vs. Applied Electric Field Values as Seen in Alaboratory Setting?

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Open Journal of Microphysics 2014年第2期4卷 15-19页

作者： Andrew Walcott Beckwith Department of Physics Chongqing University Chongqing China

We reference the tunneling Hamiltonian to have particle tunneling among different states represented as wave-functions. Our problem applies wave-functionals to a driven sine-Gordon system. We apply the tunneling Hamiltonian to charge density wave (CDW) transport problems where we consider tunneling among states that are wave-functionals of a scalar quantum field, i.e. derived I-E curves that match Zenier curves used to fit data experimentally with wave-functionals congruent with the false vacuum hypothesis. The open question is whether the coefficients picked in both wave-functionals and the magnitude of the coefficients of the driven sine-Gordon physical system are picked by topological charge arguments that appear to assign values consistent with the false vacuum hypothesis. Crucial results by Fred Cooper et al. allow a mature quantum foam interpretation of false vacuum nucleation for further refinement of our wave-functional results. In doing so, we give credence to topological arguments as a first order phase transition in CDW I-E curves.

关键词： Driven Sine Gordon Physical System CDW Topological charge False Vacuum Hypothesis I-E Curves

ANL的2Q-LEBT装置的进展报告(英文)

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Chinese Physics C 2007年第S1期31卷 111-114页

作者： R.H.Scott V.N.Asseev T.V.Kulevoy P.N.Ostroumov E.A.Poklonskaya M.Sengupta N.E.Vinogradov Physics Division Argonne National LaboratoryArgonneIL 60439USA ITEP MoscowI17259Russia St.Petersburg Electrotechnical University St.Petersburg197376Russia Northern Illinois University De KalbIL 60115USA

The concept for a 2 charge state injector for a"RIA type"accelerator has been *** toward an operational prototype 2Q-LEBT system at Argonne National Laboratory(ANL)is under way. The existing BIE 100 all permanent magnet ECR has been placed on a high voltage platform capable of a combined>100kV with q/m separation at ground *** control of the devices on the platform has been *** components of the facility are currently being *** components of an achromatic bending system are currently being *** paper will present recent work at the facility as well as preliminary development of solid materials using the BIE 100.

关键词： ECR ion source multi charge LEBT

Comments Concerning Measurements and Equations in Electromagnetism

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Journal of Electromagnetic Analysis and Applications 2010年第12期2卷 677-678页

作者： Salama Abdelhady 不详

The previously introduced US of units has raised many comments. Such comments were the claims of how to measure the electric current and magnetic flux. Other comments were concerned by violating the fundamental laws of electro-magnetism. Such violation is not the concern of the introduced system of units. But it is related to the previous mess in the available SI system of units.

关键词： Electric charge Magnetic Flux Ampere’s Law System of Units

CEA/Saclay的ECR轻离子离子源(英文)

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Chinese Physics C 2007年第S1期31卷 46-50页

作者： R.Gobin P-Y.Beauvais A.Ben Ismail D.Bogard O.Delferriere D.de Menezes R.Duperrier Y.Gauthier F.Harrault P-A.Leroy O.Tuske D.Uriot Commissariat à l'Energie Atomique CEA-SaclayDSM/DAPNIA91191 Gif sur Yvette CedexFrance

In the beginning of the 90s,*** and his collaborators demonstrated ECR sources operating at low frequency(i.e.2.45GHz)are able to produce very intense single charge light ion beams. At CEA/Saclay,the SILHI source developments started in *** 1997 more than 100mA proton or deuteron beams are routinely produced in pulsed or continuous *** comply with ADS reliability constraint,important improvements have been performed to increase the installation ***,to optimize the beam transport in the low energy beam line,the extraction system was carefully designed and space charge compensation studies were *** important step has been reached in 2005 with the development of a permanent magnet source able to produce a total beam of 109mA at 85kV. A new test bench named BETSI,especially dedicated to permanent magnet source developments,is presently under *** will allow analysing positive or negative extracted beams up to 50keV and 100mA. In addition,for several years work has been done to optimize the production of negative hydrogen ion beam with such an ECR *** analysis pushed towards the construction of a new set up based on a multicusp magnetic configuration. After a brief overview of the CEA/Saclay source developments,this article will point out on the recent results and present status.

关键词： high intensity 2.45GHz space charge compensation

LBNL 14GHz离子源AECR-U的最新进展(英文)

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Chinese Physics C 2007年第S1期31卷 75-79页

作者： M.Galloway D.Leitner C.M.Lyneis W.Cornelius Lawrence Berkeley National Laboratory BerkeleyCA94705USA Scientific Solutions Inc. San DiegoCAUSA

A radial sputter probe has been developed for the AECR-U as an additional method of producing metal ion *** voltage is applied to the probe to incite collisions with target atoms,thereby sputtering material into the *** sputter probe is positioned through one of the 6 radial access slots between the permanent hexapole structure of the *** probe position can be varied with respect to the inner edge of the hexapole magnet *** state distributions and peak beam intensities at bias voltages up to-5kV were obtained for gold samples at varying distances of the probe with respect to the *** high charge states production the radial position with respect to the plasma was more sensitive than for the medium and lower charge *** high charge state ion production the probe was optimized at a distance of 0.6cm inside the chamber wall（4.1cm from the center of the chamber）.Stable beams with peak intensities of up to 28eμA of Au24+ and 1.42eμA of Au41+ have been produced using the sputter probe technique. In addition,a solid state circuit under development by Scientific Solutions,Inc which provides a bandwidth up to 100MHz was used to drive the 14GHz klystron amplifier for the LBNL AECR-U ion *** broadband and discrete heating modes were tested and the results for high charge state ion production were compared with single frequency heating.

关键词： ECR ion source high charge state metallic ions broadband microwave

LAPECR2离子源在320kV高压平台上的试运行(英文)

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Chinese Physics C 2007年第S1期31卷 55-59页

作者：孙良亭李锦钰张雪珍王辉马宝华李锡霞冯玉成宋明涛朱玉华赵力民王平治刘惠萍赵红卫马新文詹文龙 Institute of Modern Physics (IMP) Chinese Academy of Sciences

The high charge state all permanent Electron Cyclotron Resonance Ion Source(ECRIS)LAPECR2 (Lanzhou All Permanent magnet ECR ion source No.2)has been successfully put on the 320kV HV platform at IMP and also has been connected with the successive LEBT *** source is the largest and heaviest all permanent magnet ECRIS in the *** maximum mirror field is 1.28T(without iron plug)and the effective plasma chamber volume is as large as (?)67mm×*** was designed to be operated at 14.5GHz and aimed to produce medium charge state and high charge state gaseous and also metallic ion *** source has already successfully delivered some intense gaseous ion beams to successive experimental *** paper will give a brief overview of the basic features of this permanent magnet *** commissioning results of this source on the platform,the design of the extraction system together with the successive LEBT system will be presented.

关键词： ECR high charge beam transmission

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用于产生放射性离子束ECR离子源(英文)

Chinese Physics C 2007年第S1期31卷 206-210页

作者： P.Jardin *** J.C.Cornell M.Dupuis C.Eleon J.L.Flambard G.Gaubert N.Lecesne P.Leherissier F.Lemagnen R.Leroy J.Y.Pacquet M.G.Saint Laurent A.C.C.Villari GANIL (Grand Accélérateur National d'Ions Lourds) Bd H.BecquerelBP 5502714076 CAEN Cedex 5France

ECRIS’s dedicated to radioactive ion production must be as efficient as those used for production of stable elements,but in addition they are subject to more specific constraints such as radiation hardness, short atom-to-ion transformation time,beam purity and low *** to now,different target/ion-source systems(TISSs)have been designed,using singly-charged ECRISs,multi-charged ion sources or an association of singly-to-multi-charged *** main goals,constraints and advantages of different existing ECR setups will be compared before a more detailed description is given of the one designed for the SPIRALⅡproject and its future improvements.

关键词： electron cyclotron resonance ion source electromagnetic isotope separator radioactive nuclear beams charge breeding

运行参数对甲醇HCCI燃烧稳定性和循环变动的影响

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车用发动机 2014年第1期 70-73页

作者：潘江如张春化鲁亚云新疆工程学院新疆乌鲁木齐830091 长安大学汽车学院陕西西安710064 新疆职业大学新疆乌鲁木齐830013

为研究进气温度、过量空气系数和发动机转速对甲醇HCCI燃烧循环变动和燃烧稳定性的影响,在1台改造的试验发动机上进行相关的试验。试验结果表明:随着进气温度的升高,循环变动变大,最高燃烧压力的分布较为集中;循环变动系数对过量空气系... 详细信息

为研究进气温度、过量空气系数和发动机转速对甲醇HCCI燃烧循环变动和燃烧稳定性的影响,在1台改造的试验发动机上进行相关的试验。试验结果表明:随着进气温度的升高,循环变动变大,最高燃烧压力的分布较为集中;循环变动系数对过量空气系数较为敏感,随着过量空气系数的增大,循环变动变大,最高燃烧压力的分布较为分散;随着转速的增大,循环变动变小,最高燃烧压力的平均值变大,最高燃烧压力分布集中,对于甲醇而言,进气温度为160℃,过量空气系数为2时,n=1 300r/min是较优的转速。

关键词：均质压燃甲醇循环变动 homogeneous charge compression ignition (HCCI)