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DE19615966A1 - Appts. for deflecting electron beam to elongate anode esp. for X-ray computer tomography - Google Patents

Appts. for deflecting electron beam to elongate anode esp. for X-ray computer tomography

Info

Publication number
DE19615966A1
DE19615966A1 DE1996115966 DE19615966A DE19615966A1 DE 19615966 A1 DE19615966 A1 DE 19615966A1 DE 1996115966 DE1996115966 DE 1996115966 DE 19615966 A DE19615966 A DE 19615966A DE 19615966 A1 DE19615966 A1 DE 19615966A1
Authority
DE
Germany
Prior art keywords
electron beam
anode
coil arrangement
appts
esp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE1996115966
Other languages
German (de)
Inventor
Thomas Prof Dr Ing Weiland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to DE1996115966 priority Critical patent/DE19615966A1/en
Publication of DE19615966A1 publication Critical patent/DE19615966A1/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/24—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof
    • H01J35/30—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof by deflection of the cathode ray

Landscapes

  • X-Ray Techniques (AREA)

Abstract

The device initially guides the electron beam (2) in a solenoid coil arrangement parallel to the anode (1). The solenoid coil arrangement (4) has a region (A) in which the windings are tilted relative to the remaining windings in the coil arrangement (4). In one arrangement, the windings in the region (A) are obliquely sloping, and in another arrangement, at least one winding in region (A) of the coil arrangement (4) is tilted by 90 deg. relative to the other windings.

Description

Es sind Röntgen-Computertomographen bekannt, die eine ein Meßfeld umgebende, ringförmige Röntgenstrahlenquelle aufwei­ sen, in der eine Ringanode angeordnet ist, die zur Erzeugung eines sich drehenden Röntgenstrahlenbündels von einem Elek­ tronenstrahl abgetastet wird, welcher von einer Elektronenka­ none erzeugt wird. Die Ablenkung des Elektronenstrahls auf die Anode kann dabei durch elektromagnetische Mittel erfol­ gen.X-ray computer tomographs are known, the one Ring-shaped X-ray source surrounding the measuring field sen, in which a ring anode is arranged, which is used for generation of a rotating x-ray beam from an elec electron beam is scanned, which is from an electron none is created. The deflection of the electron beam on the anode can be done by electromagnetic means gene.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Ablenkung eines Elektronenstrahls auf eine Anode so aus­ zubilden, daß der Elektronenstrahl bei seiner Ablenkung nicht seitlich ausgelenkt wird.The invention has for its object a device to deflect an electron beam onto an anode to form that the electron beam is not deflected is laterally deflected.

Diese Aufgabe ist erfindungsgemäß gelöst durch die Merkmale des Patentanspruchs.According to the invention, this object is achieved by the features of the claim.

Die Erfindung ist nachfolgend in Verbindung mit zwei in den Fig. 1 und 2 dargestellten Ausführungsbeispielen näher erläu­ tert.The invention is below tert in conjunction with two embodiments shown in FIGS . 1 and 2 in more detail.

In der Zeichnung ist eine langgestreckte Anode 1 dargestellt, die von einem Elektronenstrahl 2 abgetastet werden soll. Der Elektronenstrahl 2 wird von einer Elektronenkanone 3 zunächst parallel zur Anode 1 in eine Solenoidspulenanordnung 4 einge­ schlossen. Zur Ablenkung des Elektronenstrahls 2 auf die An­ ode 1 sind gemäß Fig. 1 in der Solenoidspulenanordnung 2 im Bereich A mehrere Windungen gekippt. Das in diesen Windungen erzeugte Magnetfeld ist zur Anode 1 hin gekrümmt, so daß der Elektronenstrahl 2 diesem Magnetfeld folgt. Er wird dadurch auf die Anode 1 abgelenkt und nicht seitlich ausgelenkt. Das Magnetfeld im Bereich B der Solenoidspulenanordnung ist dabei ausgeschaltet. Durch eine variable elektrische Schaltung der einzelnen Windungen kann der Auftreffort des Elektronen­ strahls 2 auf der Anode 1 kontinuierlich verschoben werden.In the drawing, an elongated anode 1 is shown, which is to be scanned by an electron beam 2 . The electron beam 2 is initially closed by an electron gun 3 parallel to the anode 1 in a solenoid coil arrangement 4 . To deflect the electron beam 2 onto the electrode 1 , a plurality of turns are tilted in region A in FIG. 1 in the solenoid coil arrangement 2 . The magnetic field generated in these windings is curved toward the anode 1 , so that the electron beam 2 follows this magnetic field. He is thereby deflected to the anode 1 and not laterally deflected. The magnetic field in area B of the solenoid coil arrangement is switched off. The impact of the electron beam 2 on the anode 1 can be continuously shifted by a variable electrical circuit of the individual turns.

Die Fig. 2 zeigt, daß im Bereich A der Solenoidspulenanord­ nung 4 eine Einzelspule 5 liegt, die gegenüber den übrigen Spulen um 90° gekippt ist. Dadurch wird auch der Elektronen­ strahl 2 um 90° auf die Anode 1 abgelenkt. Fig. 2 shows that in area A of the Solenoidspulenanord voltage 4 is a single coil 5 which is tilted by 90 ° relative to the other coils. As a result, the electron beam 2 is deflected by 90 ° onto the anode 1 .

Die Spule 5 kann dabei von einer einzigen Windung gebildet sein.The coil 5 can be formed by a single turn.

Claims (3)

1. Vorrichtung zur Ablenkung eines Elektronenstrahls (2) auf eine langgestreckte Anode (1), bei der der Elektronenstrahl (2) in einer Solenoidspulenanordnung (4) zunächst parallel zur Anode (1) geführt ist, und bei der die Solenoidspulenan­ ordnung (4) einen Bereich (A) aufweist, innerhalb dessen die Windungen gegenüber den übrigen Windungen gekippt sind.1. Device for deflecting an electron beam ( 2 ) on an elongated anode ( 1 ), in which the electron beam ( 2 ) in a solenoid coil arrangement ( 4 ) is initially guided parallel to the anode ( 1 ), and in which the solenoid coil arrangement ( 4 ) has an area (A) within which the turns are tilted with respect to the other turns. 2. Vorrichtung nach Anspruch 1, bei dem die Windungen in ei­ nem Bereich (A) der Solenoidspulenanordnung (4) schräg ge­ stellt sind.2. Device according to claim 1, wherein the windings in a region (A) of the solenoid coil arrangement ( 4 ) are inclined ge. 3. Vorrichtung nach Anspruch 1, bei dem mindestens eine Win­ dung (5) in einem Bereich (A) der Solenoidspulenanordnung (4) gegenüber den übrigen Windungen im 900 gekippt ist.3. Apparatus according to claim 1, wherein at least one win tion ( 5 ) in an area (A) of the solenoid coil arrangement ( 4 ) is tilted relative to the other turns in the 900.
DE1996115966 1996-04-22 1996-04-22 Appts. for deflecting electron beam to elongate anode esp. for X-ray computer tomography Ceased DE19615966A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1996115966 DE19615966A1 (en) 1996-04-22 1996-04-22 Appts. for deflecting electron beam to elongate anode esp. for X-ray computer tomography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996115966 DE19615966A1 (en) 1996-04-22 1996-04-22 Appts. for deflecting electron beam to elongate anode esp. for X-ray computer tomography

Publications (1)

Publication Number Publication Date
DE19615966A1 true DE19615966A1 (en) 1997-10-23

Family

ID=7792060

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996115966 Ceased DE19615966A1 (en) 1996-04-22 1996-04-22 Appts. for deflecting electron beam to elongate anode esp. for X-ray computer tomography

Country Status (1)

Country Link
DE (1) DE19615966A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4433133C1 (en) * 1994-09-16 1995-12-07 Siemens Ag X=ray tube for human tomography

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4433133C1 (en) * 1994-09-16 1995-12-07 Siemens Ag X=ray tube for human tomography

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8131 Rejection