Abstract

A circuit has been developed that records the electron accelerating potential required to generate a barely detectable ion current at each mass in a mass spectrum. The level of electron accelerating potential attained for each ion peak approaches the true appearance potential for the instrument when the ion peak is one which would be large with 70 v electrons. The device is useful to select operating conditions for analyses at low electron accelerating potentials.

Compact recording of the appearance of surfaces and thin films

T. A. Wiggins
Appl. Opt. 20(6) 1020-1023 (1981)

Progress in the Recording of Human Retinal and Occipital Potentials*

Lorrin A. Riggs
J. Opt. Soc. Am. 59(12) 1558-1566 (1969)

Measurement of Color Appearance

R. W. G. Hunt
J. Opt. Soc. Am. 55(11) 1540-1551 (1965)

An Instrument for the Geometric Attributes of Metallic Appearance

John S. Christie
Appl. Opt. 8(9) 1777-1785 (1969)

Ionization Potential of O₂*

James A. R. Samson and R. B. Cairns
J. Opt. Soc. Am. 56(6) 769-775 (1966)