| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1690259 | Vacuum | 2006 | 6 Pages |
Abstract
Arc-heater plumes generated by various oxygen injection systems were investigated by laser absorption spectroscopy. Firstly, oxygen was directly injected into a high-temperature cathode-jet region through a thoriated-tungsten hollow cathode. Although number density of atomic oxygen was increased, erosion of the cathode was too severe to maintain stable discharge. Then, zirconium was used as a cathode material to reduce cathode erosion by oxidation. As a result, stable discharge was maintained for 3 h with pre-mixed argon–oxygen injection and number density of atomic oxygen was successfully increased.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Makoto Matsui, Tomoyuki Ikemoto, Hiroki Takayanagi, Kimiya Komurasaki, Yoshihiro Arakawa,