Date of Award
2013
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Physics
Committee Chair
Gary Zank
Committee Member
James A. Miller
Committee Member
John D. Fix
Subject(s)
Electron beams, Ion sources, Light emitting diodes, Photoelectronic devices
Abstract
Recent advances in light emitting diode (LED) technology have facilitated a potential remedy to the problems plaguing filament based electron sources. Using spaceworthy LEDs, the photoelectron cathode and its progenitor the ultraviolet cathode (UVC) take advantage of the photoelectric effect to produce electrons for space based experiments. To produce these devices, two species of LED, each producing either ultraviolet or visible radiation, were collected and tested to determine potential photocurrent output. Additionally, materials with requisite photoemission characteristics were collected and tested in vacuum with the LEDs to assess their usefulness as photoelectron sources. Furthermore, circuitry and computer software was compiled, tested, and refined to control the experimental and custodial duties of the UVC and photoelectron cathode while deployed as an electron source in space.
Recommended Citation
Everding, Daniel, "Development of a novel electron source for active space experiments" (2013). Theses. 50.
https://louis.uah.edu/uah-theses/50