Author:
Marmet Paul,Kerwin Larkin
Abstract
A cylindrical electrostatic electron selector is described which provides a 10−7 ampere beam of electrons whose energy may be varied from 0 to 50 ev and whose energy spread is less than 100 mv. Space-charge problems involved in the construction of the device were overcome by the use of grids for focusing electrodes with exterior electron traps, and a non-reflecting surface for electrons made from a network of tiny tubes. The selector is provided with an energy analyzer. When used to determine the appearance potential curve of argon, the selector resolved the 2P3/2 and 2P1/2 states separated by 0.18 ev, and indicated the formation of [Formula: see text] at an energy of 0.8 ev below the threshold for A+.
Publisher
Canadian Science Publishing
Subject
General Physics and Astronomy
Cited by
227 articles.
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