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Microtron electron accelerator

  • US 5,561,697 A
  • Filed: 01/13/1995
  • Issued: 10/01/1996
  • Est. Priority Date: 12/15/1992
  • Status: Expired due to Fees
First Claim
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1. An X-ray irradiating apparatus for irradiating an X-ray beam to an object to be irradiated, comprising:

  • a microtron electron accelerator for generating an accelerated electron beam;

    an X-ray irradiation head for converting said accelerated electron beam generated by said microtron electron accelerator into an X-ray beam and directing said X-ray beam toward said object;

    a rotating gantry for rotating said X-ray irradiation head around said object;

    wherein said microtron electron accelerator is incorporated into said rotating pantry; and

    wherein said microtron electron accelerator has an accelerating cavity accepting microwave electric power for generating a high-frequency accelerating electric field E disposed within a uniform magnetic field B such that electrons are accelerated and caused to move in a circular trajectory under action of the magnetic field B and the electric field E; and

    said microtron electron accelerator further includes an electron source formed of a cathode and an anode which has a minute slit allowing the electron beam extracted from said cathode to pass therethrough and disposed on the outer side of the wall of said accelerating cavity;

    a first electron beam through-hole and a second electron beam through-hole formed in the wall of said accelerating cavity in two positions, with said electron source therebetween, along the decreasing or increasing direction of the strength of the electric field E in said accelerating cavity; and

    a third electron beam through-hole formed in the wall of said accelerating cavity in a position in confrontation with said first electron beam through-hole across the inner space of said accelerating cavity.

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