Ion Source And Beam Guiding Studies For An API Neutron Generator

被引：1

作者：

Sy, A. ^{[1
]}

Ji, Q. ^{[1
]}

Persaud, A. ^{[1
]}

Ludewigt, B. A. ^{[1
]}

Schenkel, T. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

来源：

APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY | 2013年 / 1525卷

关键词：

Penning ion source; Associated particle imaging; Neutron generator; SYSTEM;

D O I：

10.1063/1.4802304

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Recently developed neutron imaging methods require high neutron yields for fast imaging times and small beam widths for good imaging resolution. For ion sources with low current density to be viable for these types of imaging methods, large extraction apertures and beam focusing must be used. We present recent work on the optimization of a Penning-type ion source for neutron generator applications. Two multi-cusp magnet configurations have been tested and are shown to increase the extracted ion current density over operation without multi-cusp magnetic fields. The use of multi-cusp magnetic confinement and gold electrode surfaces have resulted in increased ion current density, up to 2.2 mA/cm(2). Passive beam focusing using tapered dielectric capillaries has been explored due to its potential for beam compression without the cost and complexity issues associated with active focusing elements. Initial results from first experiments indicate the possibility of beam compression. Further work is required to evaluate the viability of such focusing methods for associated particle imaging (API) systems.

引用

页码：123 / 127

页数：5