检索结果-南通市图书馆

Optimization and numerical simulation for the extraction system of the H^- multicusp ion source

Chinese Physics C 2014年第5期38卷 93-97页

作者： M.Hosseinzadeh H.Afarideh Nuclear Engineering and Physics Department Amirkabir University of Technology

A new ion source has been designed and manufactured for the CYCLONE30 accelerator, which has a much advanced performance compared with the original. It is expected that the newly designed ion source extraction system will transport a very large percentage of the beam without deteriorating the beam optics, which is designed to deliver an H- beam at 30 keV. The accelerator assembly consists of three circular aperture electrodes made of copper. The simulation study was focused on finding parameter sets that raise the beam perveance as large as possible and which reduce the beam divergence as low as possible. Ion beams of the highest quality are extracted whenever the half-angular divergence is minimum, for which the perveance current intensity and the extraction gap have optimum values. The triode extraction system is designed and optimized by using CST software （for Particle Beam Simulations）. The physical design of the extraction system is given in this paper. From the simulation results, it is concluded that it is possible to achieve this goal by decreasing the thickness of the plasma electrode, shortening the first gap, and adjusting the acceleration electrode voltage.

关键词： multicusp ion source extraction electron tracking perveance angular divergence

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Development of H− multicusp ion source

引用

Radiation Detection Technology and Methods 2018年第1期2卷 186-189页

作者： M.Hoseinzade A.Nijatie Nuclear Engineering and Physics Department Amirkabir University of TechnologyTehran 15875-4413Iran Plasma Physics and Nuclear Fusion Research Department Nuclear Science and Technology Research InstituteAEOIPO Box 14155-1339TehranIran

Introduction The ion source is one of the key devices for the high-intensity cyclotron,which exerts influence on the beam intensity and applications of the *** paper will provide an introduction to current measures and present relevant experimental study as well as the beam test *** The existing ion source of the accelerator has a 2-mA output *** aim is to increase the current to roughly 5 mA to decrease the reaction time of ***,a new ion source was *** this end,some simulations were performed,and the simulated ion source was constructed,and then some measurements were *** and materials The CST code is used to simulate the chamber and extraction *** construction,some materials such as copper and stainless steel are *** wire of 2.1 mm diameter was developed to reach high beam *** and rotary pump is chosen for system *** cup can be used for *** magnets for plasma confinement are made of Nd–Fe–B *** The source assembly consists of a tubular plasma chamber(inner diameter:100 mm;length:150 mm)with 12 columns of permanent magnets(Nd–Fe–B material)to provide a stronger multicusp field,a three-electrode extraction system,and a top cover with a confinement magnet ***,5 mA H−beam can be extracted from the ion source with a plasma electrode aperture of 13 mm under an arc power of 6 *** optimum H2 gas flow rate and the change of pressure found during the tuning process of the ion source are presented.

关键词： Multicusp ion source Extraction Electron tracking perveance Angular divergence

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Status Report of the KVI-AECR

引用

Chinese Physics C 2007年第S1期31卷 90-93页

作者： H.R.Kremers J.P.M.Beijers S.Brandenburg J.Mulder Kernfysisch Versneller Instituut University of GroningenZernikelaan 259747AA GroningenNetherlands

In this paper the first results of the new ECR source at the KVI are *** source has been built following the design of Jyv(?)skyl(?) University,which is based on the AECR-U of *** the commissioning is going on,it seems that the extraction and analysing systems inherited from the old source are the limiting factors for the performance of the new *** currents achieved with the source are at the moment a factor of 3 lower than the AECR source used at the Jyv(?)skyl(?) *** modifications to improve the source performance will be discussed.

关键词： ECR beam perveance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Elementary Theory for Optimum Extraction of Space-Charge-Dominated Ion Beams from Plasma Boundaries

引用

Chinese Physics C 2007年第S1期31卷 201-205页

作者： G.D.Alton H.Bilheux Oak Ridge National Laboratory Oak RidgeTN 37831-6372USA

The problem of extracting space-charge-limited ion beams from spherical emission boundaries is analyzed for simple,two electrode,parallel-plate and spherical sector electrode systems by application of Langmuir-Blodgett theory with account taken for the divergent lens effect caused by the aperture in the extraction *** derived from simulation studies for the three electrode system,designed for use with the Oak Ridge National Laboratory ECR ion source,complement predictions made from elementary analytical theory with or without magnetic field in the extraction region of the *** minimum half- angular divergence(minimum emittance)conditions,the plasma emission boundary has an optimum curvature and the perveance,P,(i.e,current density,j+and extraction gap,d),has an optimum value for a given charge- *** these studies,we find that the optimum perveance for any electrode system can be determined from the Child-Langmuir relation for the parallel-plate electrode system multiplied by a factor,F with value 0.49≤F≤1.

关键词： space-charge dominated beam extraction theory ion beam extraction simulation optimum perveance optimum angular divergence

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：