Programmed control of electron beam power

Details Programmed control of electron beam power Programmed control of electron beam power

1983-06-30

1986-06-10

Miller, Stanley D.

X-ray or gamma ray systems or devices

Photographic detector support

Dental

328270, 378113, H01J 1982, H05G 152

Patent

active

045945543

ABSTRACT:
A method of extending the lifetime of an electron beam filament, typically LaB.sub.6 by applying power to the filament over a preselected period in a substantially linear manner. The time period is typically 20 minutes before a steady state power level is attained with a fully stabilized instrument. Power-down is a reverse of the power-up sequence until all power is removed.

REFERENCES:
patent: 1505198 (1924-08-01), Hough
patent: 2786949 (1957-03-01), Boucher
patent: 3898516 (1975-08-01), Nakasone

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