Apparatus and a method for generating a flattening x-ray radiation field

Patent metadata

Field	Value
Publication number	US-9508525-B2
Application number	US-201414494178-A
Country	US
Kind code	B2
Filing date	Sep 23, 2014
Priority date	Sep 23, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

An apparatus and a method are for generating a flattening x-ray radiation field. The apparatus includes: plurality of electron accelerators for generating high-energy electron beam current; and a common target unit including a vacuum target chamber, a target and plurality of input connectors. The plurality of input connectors are connected to one side of the vacuum target chamber and the target is installed at the other side of the vacuum target chamber opposing the plurality of input connectors, the axes of which intersect in pairs at one point in an predetermined included angle. The plurality of electron accelerators are connected to the plurality of input connectors.

First claim

What is claimed is:

1. An apparatus for generating a flattening x-ray radiation field comprising:
a plurality of electron accelerators configured to generate a high-energy electron beam current; and
a common target unit comprising a vacuum target chamber, a target and a plurality of input connectors;
wherein, the plurality of electron accelerators are connected to the plurality of input connectors, respectively.

2. The apparatus according to claim 1 , wherein the plurality of input connectors are connected to one side of the vacuum target chamber and the target is installed at the other side of the vacuum target chamber opposing the plurality of input connectors, wherein the axes of the plurality of input connectors intersect in pairs at one point at a predetermined included angle.

3. The apparatus according to claim 2 , wherein the predetermined included angles of the axes of the plurality of input connectors intersect in pairs are same.

4. The apparatus according to claim 2 , wherein the predetermined included angles of the axes of the plurality of input connectors intersect in pairs are different.

5. The apparatus according to claim 1 , wherein, the target is a flat structure and the electron beam current entering into the vacuum target chamber from the plurality of input connectors intersect at one point on the target at the plane of the vacuum side.

6. The apparatus according to claim 1 , wherein the target is a spherical structure and the electron beam currents entering into the vacuum target chamber from plurality of input connectors intersect at the center of the spherical surface.

7. The apparatus according to claim 1 , wherein the target is a structure of “L” shape and the electron beam current entering into the vacuum target chamber from the plurality of input connectors is incident on the target surface vertically.

8. The apparatus according to claim 1 , wherein the common target unit further comprises: a cooling means installed outside the vacuum target chamber enclosing one surface of the target, the interior thereof is a pipe or a cavity through which the coolant is flowable inside the cooling means so as to cool the target; a refrigeration system connected to the cooling means delivering the coolant of constant low temperature to the cooling means and decrease the temperature of the high temperature coolant flowing back from the cooling means to a predetermined value.

9. The apparatus according to claim 1 , wherein the common target unit further comprises: a vacuum system installed on the side wall of the common target unit and seal connected to the vacuum target chamber such that a high vacuum can be maintained in the vacuum target chamber during operation.

10. The apparatus according to claim 1 , wherein the common target unit further comprises: plurality of focusing means installed outside the input connecting means; a focusing control means connected to the focusing means to control the operating state of the focusing means.

11. The apparatus according to claim 1 , wherein the plurality of electron accelerators are electron linear accelerators having the same structure, wherein the electron accelerator is composed of an electron transmitting unit, an output connecting means, an electron accelerating unit connected to the electron transmitting unit at one end and connected to the output connecting means at the other end, a microwave power source connected to the electron accelerating unit via the microwave transferring means, a power supply and control system connected to the electron transmitting unit and the microwave power source, wherein the power supply and control system is connected to the superior power supply and control system and the output connecting means is connected to the input connecting means of the common target unit.

12. The apparatus according to claim 1 , wherein the plurality of electron accelerators are electron linear accelerators having the same structure, wherein the plurality of electron accelerators have a common power supply and control system, a microwave power source, a microwave power dispensing means and each of the plurality of electron accelerators further comprises an electron transmitting unit connected to the power supply and control system, an output connecting means connected to the input connecting means of the common target unit, an electron accelerating unit connected to the electron transmitting unit at one end and connected to the output connecting means at the other end, a microwave transferring means connected to the electron accelerating unit.

13. The apparatus according to claim 1 , wherein the energies of the plurality of electron accelerators are same.

14. The apparatus according to claim 1 , wherein the energies of the plurality of electron accelerators are different.

15. The apparatus according to claim 1 , wherein the plurality of electron accelerators are in the same plane.

16. The apparatus according to claim 1 , wherein the plurality of electron accelerators are not in the same plane.

17. A method for generating a flattening x-ray radiation field, comprising
providing an apparatus according to claim 1 ;
generating the high-energy electron beam current from the plurality of electron accelerators; and
bombarding the target of the common target unit at the predetermined included angle in pairs.

18. The method according to claim 17 , wherein the energies of the plurality of electron accelerators may be same or may be different.

19. The method according to claim 17 , wherein the plurality of electron accelerators are in one plane or are not in one plane.

20. The method according to claim 18 , wherein the plurality of electron accelerators are in one plane or are not in one plane.

Assignees

• Nuctech Co Ltd
• Univ Tsinghua

Inventors

• Kang Kejun
• Tang Chuanxiang
• Tang Huaping
• Chen Huaibi
• Huang Wenhui

Classifications

• H01J2235/068

  Multi-cathode assembly · CPC title

• H01J2235/1262

  Circulating fluids · CPC title

• H01J2235/086

  Target geometry · CPC title

• H05H7/06

  Two-beam arrangements; Multi-beam arrangements {storage rings}; Electron rings · CPC title

• A61N5/1077

  Beam delivery systems · CPC title