SECONDARY ELECTRONIC EMISSION OF COPPER AND OF CERTAIN COATINGS,
Abstract
Measured was the coefficient of secondary electronic copper emission, of kupalloy and beryllium bronze under vacuum conditions, characteristic for large separable electro-vacuum installations with vapor-oil pumps and rubber packings. Examined was the effect on secondary emission of electronic and ionic bombardment and a series of chemical and mechanical surface machinings. Measurements were carried out with the aid of an ordinary electrostatic unit. A tantalum strip serves as the cathode with thorium oxide, spot applied against the opening in the focusing electrode. The installation was placed in a sectional steel vacuum chamber, which is evacuated by an oily diffusion pump with nitrogen traps. Beam voltage and the primary and secondary electron currents are registered on a multiple point self-recording potentiometer, allowing one to remove dependence graphs of the secondary electronic emission coefficient.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 30, 1966
- Accession Number
- AD0631855
Entities
People
- D. B. Diatroptov
Organizations
- National Air and Space Intelligence Center