1992-09-08
1994-06-07
O'Shea, Sandra L.
328233, H05H 1100, H01J 2334
Patent
active
053193148
ABSTRACT:
A betatron, adapted, e.g., for use as a high-energy electromagnetic radiation source in a borehole well logging tool, includes modulator circuitry for actively controlling the electron beam radius during acceleration and for extracting the electron beam at or near maximum magnetic field strength. Such control may be effected by suitable separate pulsing of field-coil and core-coil magnets, and results in enhanced efficiency of betatron magnet-excitation power conversion and beam end-point energy stability and intensity over a range of operating temperatures.
REFERENCES:
patent: 4972082 (1990-11-01), Loomis et al.
patent: 5077530 (1991-12-01), Chen
patent: 5107222 (1992-04-01), Tsuzuki
patent: 5122662 (1992-06-01), Chen et al.
O'Shea Sandra L.
Patel Nimesh
Schlumberger Technology Corporation
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