Radiant energy – With charged particle beam deflection or focussing – Magnetic lens
Patent
1987-10-05
1989-12-05
Fields, Carolyn E.
Radiant energy
With charged particle beam deflection or focussing
Magnetic lens
250294, 250281, H01J 3936
Patent
active
048854700
ABSTRACT:
An improved radio frequency quadrupole (10) is provided having an elongate housing (11) with an elongate central axis (12) and top, bottom and two side walls (13a-d) symmetrically disposed about the axis, and vanes (14a-d) formed integrally with the walls (13a-d), the vanes (14a-d) each having a cross-section at right angles to the central axis (12) which tapers inwardly toward the axis to form electrode tips (15a-d) spaced from each other by predetermined distances. Each of the four walls (13a-d), and the vanes (14a-d) integral therewith, is a separate structural element having a central lengthwise plane (16) passing through the tip of the vane, the walls (13a-d) having flat mounting surfaces (17, 18) at right angles to and parallel to the control plane (16), respectively, which are butted together to position the walls and vane tips relative to each other.
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Carnahan L. E.
Fields Carolyn E.
Gaither Roger S.
Miller John A.
Moser William R.
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