Title:
X-RAY TUBE HAVING PLANAR EMITTER AND MAGNETIC FOCUSING AND STEERING COMPONENTS
Document Type and Number:
WIPO Patent Application WO/2016/149278
Kind Code:
A8
Abstract:
An X-ray tube can include: a cathode planar emitter that emits an inhomogeneous electron beam; an anode to receive the electron beam; a first magnetic quadrupole having a first yoke with four evenly distributed first pole projections extending from the first yoke (404) and oriented toward a central axis of the first yoke and each of the four first pole projections having a first quadrupole electromagnetic coil; a second magnetic quadrupole having a second yoke (402) with four evenly distributed second pole projections extending from the second yoke and oriented toward a central axis of the second yoke and each of the four second pole projections having a second quadrupole electromagnetic coil; and at least one coil (on 450) of a first pair of opposing coils with alternating current offset from the power supply. Alternative soultions i.a. with AC offset current directly to quadrupole coils instead of the separate coil as well as details of the emitter are disclosed.
Inventors:
WOODMAN COLTON B (US)
CANFIELD BRADLEY D (US)
CANFIELD BRADLEY D (US)
Application Number:
PCT/US2016/022485
Publication Date:
November 10, 2016
Filing Date:
March 15, 2016
Export Citation:
Assignee:
VARIAN MED SYS INC (US)
International Classes:
H01J35/06; H01J9/04; H01J35/30
Attorney, Agent or Firm:
CROFT, Jason et al. (1389 Center Drive Suite 30, Park City UT, US)
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