Accession Number : AD0611128

Title :   ELECTRON TIME OF FLIGHT SPECTROMETER.

Descriptive Note : Annual summary rept. no. 2 for the period ending 30 Sep 64,

Corporate Author : GENERAL ELECTRIC CO SCHENECTADY N Y

Personal Author(s) : Baldwin,G. C.

Report Date : 28 OCT 1964

Pagination or Media Count : 4

Abstract : The work to date has shown that the principle of velocity selection by time-of-flight measurement is applicable to slow electrons. Energies below 0.25 volt have been detected, and there seems to be hope that this can be extended downward by at least a factor of 5. The present limits are set by practical problems of shielding, light source duration, interactions of the sample gas with emitter and detector surfaces and contact emf changes. The accuracy of measuring cross sections will be limited mainly by the pressure measurement technique and the interactions of the sample gases with surfaces in the spectrometer. This spectrometer can be adapted with relatively minor changes to studies of electron reflection, of secondary emission, photoelectric spectra, adsorbed films, and surface states of solids.

Descriptors :   (*ELECTRONS, SPECTRUM ANALYZERS), (*SPECTRUM ANALYZERS, ELECTRONS), (*VELOCITY, SELECTION), SPECTROSCOPY, TIME, PROBABILITY, GASES, DEFLECTION, ELECTRON BEAMS, SCATTERING, MEASUREMENT

Distribution Statement : APPROVED FOR PUBLIC RELEASE