一种紧凑、通用的低能电子束离子源。

A compact, versatile low-energy electron beam ion source.

作者信息

Zschornack G, König J, Schmidt M, Thorn A

机构信息

Department of Physics, Dresden University of Technology, 01062 Dresden, Germany and Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.

DREEBIT GmbH, 01109 Dresden, Germany.

出版信息

Rev Sci Instrum. 2014 Feb;85(2):02B703. doi: 10.1063/1.4826687.

DOI:10.1063/1.4826687

PMID:24593602

Abstract

A new compact Electron Beam Ion Source, the Dresden EBIT-LE, is introduced as an ion source working at low electron beam energies. The EBIT-LE operates at an electron energy ranging from 100 eV to some keV and can easily be modified to an EBIT also working at higher electron beam energies of up to 15 keV. We show that, depending on the electron beam energy, electron beam currents from a few mA in the low-energy regime up to about 40 mA in the high-energy regime are possible. Technical solutions as well as first experimental results of the EBIT-LE are presented. In ion extraction experiments, a stable production of low and intermediate charged ions at electron beam energies below 2 keV is demonstrated. Furthermore, X-ray spectroscopy measurements confirm the possibility of using the machine as a source of X-rays from ions excited at low electron energies.

摘要

一种新型紧凑型电子束离子源——德累斯顿低能电子束离子源（Dresden EBIT-LE）被作为一种在低电子束能量下工作的离子源引入。EBIT-LE在100电子伏特至数keV的电子能量范围内运行，并且可以很容易地改装成也能在高达15keV的更高电子束能量下工作的电子束离子源。我们表明，根据电子束能量的不同，在低能量状态下几毫安的电子束电流到高能量状态下约40毫安的电子束电流都是可能的。文中介绍了EBIT-LE的技术解决方案以及首次实验结果。在离子提取实验中，证明了在低于2keV的电子束能量下能够稳定产生低电荷和中等电荷离子。此外，X射线光谱测量证实了将该装置用作低电子能量激发离子产生X射线源的可能性。