Charge integration in external-beam PIXE

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: J.-O Lill
Publisher: ELSEVIER SCIENCE BV
Publication year: 1999
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Journal acronym: NUCL INSTRUM METH B
Volume number: 150
Issue number: 1-4
Start page: 114
End page: 117
Number of pages: 4
ISSN: 0168-583X


Abstract

Direct measurements of the beam current in external-beam PIXE are difficult due to the ionization of air molecules. A method for indirect charge integration has been earlier presented by our research group. The method utilizes the light emission from air molecules excited by the particle beam. The light emission originates from the second positive band system in N-2. The light was measured with a photomultiplier tube. The geometry and the electronics have been improved during the six years that have passed since the method was taken into use. The current from the PM-tube is today about 210 times higher than the particle beam current measured by the means of a Faraday cup. This amplification is useful in the monitoring of small beam currents. The linearity and accuracy of the improved system are discussed. (C) 1999 Elsevier Science B.V. All rights reserved.


Keywords

charge integration, external beam, low current measurements, PIXE, second positive band system

Last updated on 2019-16-09 at 05:42