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Full-Text Articles in Physics
High-Voltage Variable Resistor For Ion Energy Spectroscopy, Timothy J. Gay, V. D. Irby, S. P. Yallaly
High-Voltage Variable Resistor For Ion Energy Spectroscopy, Timothy J. Gay, V. D. Irby, S. P. Yallaly
Timothy J. Gay Publications
A high-voltage variable resistor was designed, built, and implemented to modify an ion-energy spectrometer for the study of ion-atom collisions in which the projectiles change charge. The resistor is remotely switchable from 0 to 2050 MΩ and has a voltage rating of 200 kV. The design criteria and the electrical and mechanical details of the apparatus are discussed. The design and construction of an ancillary device, comprising two precision resistive-divider voltmeters, are also discussed.
Investigation Of Spin-Orbit Effects In The Excitation Of Noble Gases By Spin-Polarized Electrons, J. E. Furst, W. M. K. P. Wijayaratna, D. H. Madison, Timothy J. Gay
Investigation Of Spin-Orbit Effects In The Excitation Of Noble Gases By Spin-Polarized Electrons, J. E. Furst, W. M. K. P. Wijayaratna, D. H. Madison, Timothy J. Gay
Timothy J. Gay Publications
We have measured the integrated Stokes parameters of the light emitted following the impact excitation by polarized electrons of the np5 (n+1)p [5/2] 3 states in Ne (n=2), Ar (n=3), Kr (n=4), Xe (n=5), and the np5 (n+1) p[5/2] 2 state in Kr. The near-threshold linear-polarization fractions η1 were consistent with zero for all of the J=3 states measured, providing no evidence of Mott scattering. For J=2 excitation, η1 shows the clear influence of the intermediately coupled nature of the state. …