阅读说明：本技术 用于x射线管的控制装置以及用于操作x射线管的方法 (Control device for an X-ray tube and method for operating an X-ray tube ) 是由 S·弗里茨 H·加法里 J·雷尔曼 于 2018-08-31 设计创作，主要内容包括：本发明涉及一种用于X射线管(2)的控制装置,包括：壳体(29),所述壳体被设计为护罩,其中布置有阳极电流调节单元(1)并且所述阳极电流调节单元连接至阴极供电单元(18)；多个阴极电压开关(20、21、22、23、24),所述多个阴极电压开关在每种情况下连接至阴极(4)；以及可编程组件(25),其中确定所述阴极(4)的控制。所述阴极供电单元(18)、所述阴极电压开关(20、21、22、23、24)以及所述可编程组件(18)也布置在所述壳体(29)中。(The invention relates to a control device for an X-ray tube (2), comprising: a housing (29) designed as a shroud, in which an anode current regulating unit (1) is arranged and which is connected to a cathode power supply unit (18); a plurality of cathode voltage switches (20, 21, 22, 23, 24) connected in each case to the cathode (4); and a programmable component (25) in which the control of the cathode (4) is determined. The cathode supply unit (18), the cathode voltage switches (20, 21, 22, 23, 24) and the programmable component (18) are also arranged in the housing (29).)

1. A control device for an X-ray tube (2), comprising: an anode (5) designed as an X-ray emitter; and a plurality of cathodes (4) providing for the generation of an electron beam directed towards the anode (5), the control device having: a housing (29) designed as a shroud, in which an anode current regulating unit (1) is arranged, which is connected to a cathode power supply unit (18); a plurality of cathode voltage switches (20, 21, 22, 23, 24) connected in each case to the cathode (4); and a programmable component (25), wherein the control of the cathode (4) is determined, wherein the cathode supply unit (18), the cathode voltage switch (20, 21, 22, 23, 24) and the programmable component (18) are also arranged in the housing (29).

2. Control device according to claim 1, characterized in that the programmable component (29) comprises an FPGA (27) and a microcontroller (26).

3. Control arrangement according to claim 1 or 2, characterized in that the cathode voltage switches (20, 21, 22, 23, 24) are designed as a whole as high-voltage switch banks with a plurality of MOSFETs.

4. Control device according to any one of claims 1 to 3, characterized by focusing electrodes (11, 12) assigned to the individual cathodes (4), wherein an extraction grid (10) arranged between the cathode (4) and the focusing electrodes (11, 12) is grounded independently of the focusing electrodes (11, 12).

5. The control device according to any one of claims 1 to 4, characterized in that the programmable component (25) is designed for storing operating parameters measured during operation of the X-ray tube (2).

6. Control device according to any one of claims 1 to 5, characterized in that the cathode (4) is designed as a field emission cathode.

7. Control device according to claim 6, characterized in that the cathode (4) comprises nanorods as electron emitters, in particular carbon nanotubes and/or nanotubes made of lanthanum hexaboride and/or cerium hexaboride.

8. Control device according to any one of claims 1 to 5, characterized in that the cathode (4) is designed as a diffusion cathode.

9. Control arrangement according to any of claims 3-8, characterized in that the arrangement comprises a discharge circuit (68) designed to discharge the capacitance formed by the cathode (4) of a supply line comprising the cathode, which discharge circuit is connected to the cathode voltage switch (20, 21, 22, 23, 24).

10. The control device according to any one of claims 1 to 9, characterized by an anode voltage supply unit (14).

11. Control arrangement according to claim 10, characterized in that the anode voltage supply unit (14) is designed for pulsed operation of the anode (5).

12. Control arrangement according to claim 10 or 11, characterized in that the anode voltage supply unit (14) comprises a marx generator (65).

13. A method for operating an X-ray tube (2) comprising an X-ray emitting anode (5) and a plurality of cathodes (4), each of which directs an electron beam onto the anode (5), the method having the following features:

-specifying a setpoint value (I) for the current flowing through the anode (5)_A-S)，

-regulating the actual current (I) through the anode by means of an individual power supply (19)_A-actual) The power supply is connected to several switches (20, 21, 22, 23, 24), each of which is assigned to a cathode (4).

14. Method according to claim 13, characterized in that the cathode (4) is operated with a pulsed current, wherein at the beginning of a pulse a peak value (PE) is generated which exceeds the level of the pulse.

15. Method according to claim 13 or 14, characterized in that the focal point produced by an individual cathode (4) on the anode (5) is cathode-specifically set by means of a focusing device (11, 12) assigned to the cathode (4).

16. Method according to any one of claims 13 to 15, characterized in that an extraction grid (10) assigned to the cathodes (4) is used for focusing the electron beams emitted by the respective cathodes (4).

17. Method according to any of claims 13-16, characterized by detecting the current (I) flowing through the anode (5)_A-actual) Detects an increased risk of flashover between the anode (5) and the cathode (4), and switches (20, 21, 22, 23, 24) assigned to the cathode (4) are closed preventively.

18. Method according to any of claims 13-17, characterized in that the anode (5) is operated in a pulsed manner, wherein at the beginning of the pulse a pre-pulse compensation PPC is generated to compensate the capacitance.

19. Method according to claim 18, characterized in that the anode (5) is at different voltage levels (U) during successive pulses_A) The following operations are carried out.