Mechanisms of Emitter Surface Damage During EHD Colloid Particle Generation and Acceleration.

Abstract

A model of emitter tip erosion has been developed that correlates with performance degradation. The erosion is caused by back bombardment of the emitter by negative ions produced from the break up of slow droplets as a result of collisions with fast ions. Calculations are made assuming the droplets are all the same size rather than using the distribution of droplet sizes actually observed. If at least one negative ion is produced at each ion/droplet collision the resulting sputtering date is sufficient to explain the measured erosion.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1977
Accession Number
ADA038982

Entities

People

  • John F. Mahoney
  • Julius Perel

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Air Force
  • Charged Particles
  • Collisions
  • Contracts
  • Degradation
  • Demographic Cohorts
  • Electric Propulsion
  • Erosion
  • Flow Rate
  • Normal Distribution
  • Particle Collisions
  • Particle Size
  • Particles
  • Security
  • Sputtering
  • Standards

Fields of Study

  • Physics

Readers

  • Plasma Physics.