NTRS - NASA Technical Reports Server

Back to Results
Method of constructing dished ion thruster grids to provide hole array spacing compensationThe center-to-center spacings of a photoresist pattern for an array of holes applied to a thin metal sheet are increased by uniformly stretching the thin metal sheet in all directions along the plane of the sheet. The uniform stretching is provided by securely clamping the periphery of the sheet and applying an annular force against the face of the sheet, within the periphery of the sheet and around the photoresist pattern. The technique is used in the construction of ion thruster grid units where the outer or downstream grid is subjected to uniform stretching prior to convex molding. The technique provides alignment of the holes of grid pairs so as to direct the ion beamlets in a direction parallel to the axis of the grid unit and thereby provide optimization of the available thrust.
Document ID
Document Type
Other - Patent
Banks, B. A.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 8, 2013
Publication Date
April 6, 1976
Subject Category
Spacecraft Propulsion And Power
Distribution Limits
Work of the US Gov. Public Use Permitted.
Patent Application

Available Downloads

NameType 19760014188.pdf STI

Related Records

IDRelationTitleN75-16624Superseded By
No Preview Available