Cart (Loading....) | Create Account
Close category search window

Charging of Macroparticles in a Pulsed Vacuum Arc Discharge

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Rysanek, F. ; Univ. of Illinois at Urbana-Champaign, Urbana, IL ; Burton, Rodney L.

A pulsed vacuum arc discharge emits a plasma as well as macroparticles (MPs) in the form of micrometer-sized molten droplets of cathode material. Due to their direction of flight and submicrometer to 100-mum diameter, these MPs often pose a contamination threat for both spacecraft-based thrusters and thin-film deposition systems. The velocity, mass, and charge of copper MPs emitted by a 100-A arc was experimentally measured and compared to a model based on thermionic electron emission. The MP velocity was determined by using a time-of-flight velocity filter. The charge was calculated by measuring particle deflection in a transverse electric field. The model predicts, and the experimental results verify, that the charge on the MPs becomes positive once the plasma is extinguished, and the MP travels in a vacuum, as would occur in a pulsed vacuum arc, versus a dc arc. Experimental results show a roughly quadratic dependence of particle charge on the particle diameter (q ~ D2), with a 1-mum particle having a positive charge of ~1000 electronic charges (1.6 times 10-16 C), and a 5-mum particle having a charge of ~25 000 electronic charges. The model is particle temperature dependent, and gives q ~ D2 at 1750 K and q ~ D1.7 at 2200 K. Arguments are also made for limitations on particle temperature due to radiative and evaporative cooling.

Published in:

Plasma Science, IEEE Transactions on  (Volume:36 ,  Issue: 5 )

Date of Publication:

Oct. 2008

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.