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Geometry and properties of the plasma in a quadrupole ion pumpThe diameter of the plasma in a quadrupole ionization gauge and quadrupole ion pump has been measured as a function of pressure. The radio-frequency quadrupole systems are tuned in such a way that electrons remain on stable trajectories in the center of the tube. Being emitted at one end, the electrons encounter an inverted field at the other end so that they travel on spiral paths back and forth until they collide with the rest gas molecules, producing ions which are collected as an ion current at a cylinder surrounding the four hyperbolically shaped quadrupole electrodes.
Document ID
19770055118
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Schwarz, H.
(Rensselaer Polytechnic Institute, Troy, N.Y.; Brasilia, Universidade Brasilia, Brazil)
Date Acquired
August 9, 2013
Publication Date
April 1, 1977
Publication Information
Publication: Journal of Vacuum Science and Technology
Volume: 14
Subject Category
Instrumentation And Photography
Accession Number
77A37970
Funding Number(s)
CONTRACT_GRANT: NGL-07-009-003
Distribution Limits
Public
Copyright
Other

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