Pumps – Electrical or getter type – Ionic with gettering
Patent
1981-07-06
1983-08-09
Look, Edward K.
Pumps
Electrical or getter type
Ionic with gettering
328233, F04B 3702
Patent
active
043976115
ABSTRACT:
In particle beam optical instrumentation, an array of conventional sputter ion pump cells distributed in a ring shaped array about the circumference of the volume (optical column) to be pumped. An axially symmetrical, hollow, toroid magnetic circuit, formed by axially symmetrical magnets, either of the permanent type or of the electromagnetic type (or a combination of both), is used and the pumping action is outward from the central throughbore in the column so that the bore space could be occupied by other instrumentation. The magnetic circit may be used for particle beam focusing (optical lens) as well as for the pumping action by introducing magnetic gaps in either a series or parallel configuration.
REFERENCES:
patent: 3299311 (1967-01-01), Veith et al.
patent: 3379365 (1968-04-01), Hait
patent: 3463959 (1969-08-01), Jory et al.
patent: 3596123 (1971-07-01), Levin
Veneklasen Lee H.
Wiesner John C.
Dwyer J. R.
Giarratana S. A.
Look Edward K.
Murphy T. P.
The Perkin-Elmer Corp.
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