NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Clearance of short circuited ion optics electrodes by capacitive dischargeThe ion optics electrodes of low specific impulse (3000 sec) mercury electron bombardment ion thrusters are vulnerable to short circuits by virtue of their relatively small interelectrode spacing (0.5 mm). Metallic flakes from backsputtered deposits are the most probable cause of such 'shorts' and 'typical' flakes have been simulated here using refractory wire that has a representative, but controllable, cross section. Shorting wires can be removed by capacitive discharge without significant damage to the electrodes. This paper describes an evaluation of 'short' removal versus electrode damage for several combinations of capacitor voltage, stored energy, and short circuit conditions.
Document ID
19770030160
Document Type
Conference Paper
Authors
Poeschel, R. L. (Hughes Research Laboratories Malibu, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
November 1, 1976
Subject Category
SPACECRAFT PROPULSION AND POWER
Report/Patent Number
AIAA PAPER 76-1031
Meeting Information
International Electric Propulsion Conference(Key Biscayne, FL)
Funding Number(s)
CONTRACT_GRANT: NAS3-19703
Distribution Limits
Public
Copyright
Other