Emissivity enhanced x-ray target
AssigneeGeneral Electric Company
InventorsDavid W. Woodruff, Robert D. Lillquist
Life of this patent
Estimating the term…
Abstract
An x-ray tube target includes an annular disk having an outer surface including front and back opposite faces, and an annular focal track fixedly joined to the disk front face for producing x-rays. The disk outer surface is rough away from the focal track, with surface roughness pits having width and depth dimensions greater than a wavelength of peak radiant emission of the target at operating temperature for increasing emissivity of the target to increase thermal radiation cooling thereof.
Claims20
A target operable at operating temperature and rotary speed in an x-ray tube comprising:
- an annular disk having an outer surface including front and back opposite faces;
- an annular focal track fixedly joined to said disk front face for producing x-rays upon electron impingement thereof, and for heating said disk to said operating temperature;
- and
- said disk outer surface being rough away from said focal track, with surface roughness pits having width and depth dimensions greater than a wavelength of peak radiant emissions of said target at said operating temperature for increasing emissivity of said target to increase thermal radiation cooling thereof, and said surface roughness being disposed substantially uniformly around said disk for maintaining vibratory balance of said target at said operating speed.
A method of making a target operable at operating temperature and rotary speed in an x-ray tube comprising:
- forming an annular disk having an outer surface including front and back opposite faces;
- roughening said disk outer surface to obtain surface roughness pits having width and depth dimensions greater than a wavelength of peak radiant emission of said target at said operating temperature for increasing emissivity of said target to increase thermal radiation cooling thereof, and said surface roughness being disposed substantially uniformly around said disk for maintaining vibratory balance of said target at said operating speed;
- and
- forming an annular focal track fixedly joined to said disk front face for producing x-rays upon electron impingement thereof, and for heating said disk to said operating temperature.
Dependencies are inferred from the claim text.