Atomic Beam Studies Relevant to the Space Environment
Abstract
This final report describes the development, testing and utilization of an atomic oxygen beam apparatus, capable of energies ranging from approximately 4 eV to over 500 eV. The technique employed is that of creating a beam of negative oxygen ions, typically from electron impact on N2O, then focussing and deceleration with subsequent electron photodetachment employing an argon-ion laser cavity with boosted power. Up to 30% of the ion beam may be photodetached at maximum laser powers, producing approximately 50 na of equivalent neutral flux. Angular divergence and energy spread are both well controlled and the total beam intensity is known to about 3 to 5 %. Higher beam fluxes may be attained, but at the cost of filament and laser window lifetimes. Several measurements are described employing the beam apparatus in conjunction with a high stability quartz crystal mass monitor. Capabilities of the system have been demonstrated for studies of erosion, secondary charged particle production, and related work.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1993
- Accession Number
- ADA268628
Entities
People
- Robert C. Amme
Organizations
- University of Denver