Apparatus and method for inhibiting the generation of excessive

Details Apparatus and method for inhibiting the generation of excessive Apparatus and method for inhibiting the generation of excessive

1989-08-31

1991-09-03

Fields, Carolyn E.

X-ray or gamma ray systems or devices

Source

378110, 378112, 378117, 250397, H05G 154

Patent

active

050460781

ABSTRACT:
The generation of excessive electron radiation is prevented in an apparatus which comprises an accelerator means for generating and accelerating electrons. The accelerator comprises an electron injector for emitting injector pulses, an electron gun for receiving the injector pulses, a waveguide receiving electrons from the electron gun and a high frequency source for supplying RF signals for the generation of an electric field for accelerating the electrons in the waveguide and generating the electron beam which has a predetermined intensity level according to the amplitudes of the injector pulses. A sensing means senses the amplitudes of the injector pulses and generates sensing signals. The amplitudes of the sensing signals are compared with predetermined reference voltage values and the generation of the electron beam is prevented if the amplitudes of the sensing signals exceed the predetermined reference voltage value.

REFERENCES:
patent: 4095114 (1978-06-01), Taumana
patent: 4115830 (1978-09-01), Stieber
patent: 4342060 (1982-07-01), Gibson
patent: 4347547 (1982-08-01), Gibson
patent: 4442352 (1984-04-01), Brahme
patent: 4627089 (1986-12-01), Menor et al.
patent: 4726046 (1988-02-01), Nunan
"A Primer on Theory and Operation of Linear Accelerators in Radiation Therapy", U.S. Department of Health and Human Servies, Rockville, MD, Dec. 1981.

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