Back to results
US 4,523,327 AGranted
Multi-color X-ray line source
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorJay D. Eversole
Life of this patent
Estimating the term…
Abstract
An anode target comprises a copper block having different elemental target materials bonded to segments of the circumference, which rotate past the electron emitting cathode, to provide different emission lines in sequence. Aluminum and silicon target materials produce lines which bracket the aluminum absorption edge, to detect small amounts of aluminum in the presence of other absorbing materials by differential absorption of these two lines. Silver and rhodium may be used to bracket the chlorine absorption edge.
Claims17
A multi-target X-ray source comprising:
- an envelope;
- an anode rotatably supported within the envelope and having an annular target portion;
- an electron emitting cathode supported within the envelope in spaced relationship with the target portion;
- the target portion being comprised of a plurality of segments of different target materials of a substantially uniform thickness, with the target material of each segment being an integral unit having a smooth continuous surface;
- wherein said envelope includes a window of beryllilum which is very thin and has a small aperature, the window being attached to a port in said envelope by a flexible bellows and mounted to permit manipulation of the aperature to adjust the take off angle of the X-ray beam which passes through the window.
2 more elements
A multi-target X-ray source comprising:
- an envelope;
- an anode rotatably supported within the envelope and having an annular target portion;
- an electron emitting cathode supported within the envelope in spaced relationship with the target portion;
- the target portion being comprised of a plurality of segments of different target materials of a substantially uniform thickness, with the target material of each segment being an integral unit having a smooth continuous surface;
- wherein said anode has a main cylindrical body in the form of a copper base, said target portion is on the outer circumference thereof;
- and the target material of each segment is substantially a single elemental material.
3 more elements
A multi-target X-ray source comprising:
- an envelope;
- an anode rotatably supported within the envelope and having an annular target portion;
- an electron emitting cathode supported within the envelope in spaced relationship with the target portion;
- the target portion being comprised of a plurality of segments of different target materials of a substantially uniform thickness, with the target material of each segment being an intgegral unit having a smooth continuous surface;
- wherein said anode has a main cylindrical body, said target portion is on the outer circumference thereof, all points on the outer surface of the target portion being substantially equidistant from an axis of rotation for the anode, with the cathode at a greater radial distance from said axis than said outer surface, and window means forming part of said envelope located to pass an X-ray beam emitted from the target portion at a small take off angle in a range down to zero degrees to said outer surface.
2 more elements
A multi-target X-ray source comprising:
- an envelope;
- an anode rotatably supported within the envelope and having an annular target portion;
- an electron emitting cathode supported within the envelope in spaced relationship with the target portion;
- the target portion being comprised of a plurality of segments of different target materials of a substantially uniform thickness, with the target material of each segment being an intgegral unit having a smooth continuous surface;
- wherein said anode includes a base portion, and wherein the target material of each segment is attached to said base portion with bonding of the type produced by plasma spraying.
2 more elements
A multi-target X-ray souurce comprising:
- an envelope;
- an anode rotatably supported within the envelope and having an annular target portion;
- an electron emitting cathode supported within the envelope in spaced relationship with the target portion;
- the target portion being comprised of a plurality of segments of different target materials of a substantially uniform thickness, with the target material of each segment being an intgegral unit having a smooth continuous surface;
- wherein said envelope is evacuated by continuous pumping during operation, the anode is mounted on a shaft passing through the envelope to the outside, with a seal maintained between the envelope and the shaft by a series of fluid rings, the fluid being a silicon-based suspension of fine iron particles held in place around the shaft by permanent magnets mounted in the envelope.
2 more elements
Dependencies are inferred from the claim text.