Ultraviolet stimulated electron source for use with low energy plasma instrument calibration

Autor:	Henderson, Kevin, Harper, Ron, Funsten, Herb, MacDonald, Elizabeth
Rok vydání:	2011
Předmět:	Physics - Space Physics Physics - Instrumentation and Detectors
Druh dokumentu:	Working Paper
DOI:	10.1063/1.4732810
Popis:	We have developed and demonstrated a versatile, compact electron source that can produce a monoenergetic electron beam up to 50 mm diameter from 0.1 to 30 keV with an energy spread of <10 eV. By illuminating a metal cathode plate with a single near ultraviolet (UV) light emitting diode (LED), a spatially uniform electron beam with 15% variation over 1 cm2 can be generated. A uniform electric field in front of the cathode surface accelerates the electrons into a beam with an angular divergence of <1 degree at 1 keV. The beam intensity can be controlled from 10^9 electrons/cm2s. Comment: 12, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1108.4015 Zobrazit plný text záznamu View this record from Arxiv