Well logging sonde including a linear particle accelerator

Details Well logging sonde including a linear particle accelerator Well logging sonde including a linear particle accelerator

1976-11-16

1978-06-06

Dixon, Harold A.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250270, 250494, 250502, G01V 500

Patent

active

040938549

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a logging sonde includes a standing wave type microwave linear particle accelerator excited by a magnetron and producing bursts of high energy electrons which can selectively bombard either a neutron emitting target or a photon emitting target. Means are provided to sense the variations in the amplitude of the microwave field in the linear accelerator and to control the frequency of the magnetron so as to maintain the amplitude of the accelerating field at a reference value representative of the expected maximum amplitude value at resonance. Means are also provided to sense the variations in the temperature of the linear accelerator and to control the frequency of the magnetron so as to compensate for the variations in the resonant frequency of the accelerator that result from temperature induced changes the length thereof.

REFERENCES:
patent: 2769096 (1956-10-01), Frey
patent: 2902613 (1959-09-01), Baldwin
patent: 3015030 (1961-12-01), Jones
patent: 3546524 (1970-12-01), Stark

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