A high performance electrostatic positron beam

被引：26

作者：

Brusa, RS

Karwasz, GP

Bettonte, M

Zecca, A

机构：

[1] Università di Trento, Dipartimento di Fisica, 38050 Povo, Trento

来源：

APPLIED SURFACE SCIENCE | 1997年 / 116卷

关键词：

D O I：

10.1016/S0169-4332(96)01028-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new electrostatic positron beam for Doppler broadening measurements in the near surface layers has been constructed and tested in the Trento laboratory. The beam energy is tuneable from 50 eV to 50 keV. The diameter of the beam spot at the sample is two mm FWHM, when a commercial Na-22 source of 3 mm in diameter is used. The beam could be easily upgraded to become a microbeam. The apparatus is described and the preliminary tests are presented.

引用

页码：59 / 62

页数：4

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