| (19) |
 |
|
(11) |
EP 0 432 568 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
28.08.1991 Bulletin 1991/35 |
| (43) |
Date of publication A2: |
|
19.06.1991 Bulletin 1991/25 |
| (22) |
Date of filing: 27.11.1990 |
|
|
| (84) |
Designated Contracting States: |
|
AT DE FR GB NL |
| (30) |
Priority: |
11.12.1989 US 448384
|
| (71) |
Applicant: GENERAL ELECTRIC COMPANY |
|
Schenectady
New York 12305 (US) |
|
| (72) |
Inventors: |
|
- Mohr, Gregory Alan
Scotia,
New York 12302 (US)
- Tiemann, Jerome Johnson
Schenectady,
New York 12305 (US)
- Cueman, Michael Kent
Niskayuna,
New York 12309 (US)
|
| (74) |
Representative: Catherine, Alain |
|
General Electric France
Service de Propriété Industrielle
18 Rue Horace Vernet
92136 Issy-Les-Moulineaux Cedex
92136 Issy-Les-Moulineaux Cedex (FR) |
|
| |
|
| (54) |
X ray tube anode and tube having same |
(57) An X-ray tube anode (32) has a thin metal film first layer (31a), e.g. W, for producing
hard X-rays. A diamond (31b) second layer supports the first layer, conducts heat
away from it, and transmits X-rays (34a, 34b). The layers usually have a maximum thickness
of about the stopping distance of incident electrons. An X-ray tube has such an anode
and a heat sink (38) in contact with the layers. The sink can have a beam dump (42)
and a transmission mode X-ray window (36b). A normal mode X-ray window (36a) is in
the tube envelope near the anode.