Standing wave particle beam accelerator having a plurality of power inputs
View Patent ↗A device for generating a particle beam includes a particle source, and a structure having a first section and a second section, the first section coupled to the particle source, the first section having a first power input, and the second section having a second power input, wherein the first section is configured to produce a particle beam having a first energy E 1 , and the second section is configured to increase or decrease the first energy E 1 by an amount E 2 , the absolute value of E 2 being less than E 1 .
1. A device for generating a particle beam, comprising:
a particle source; and
a structure having a first section coupled to the particle source and a second section, the first section having a first length along an axis of the first section, the second section having a second length along an axis of the second section, and the second length being shorter than the first length, wherein the first section has a first power input and the second section has a second power input.
2. The device of claim 1 , further comprising a power system for delivering a first power to the first power input and a second power to the second power input.
3. The device of claim 2 , wherein the first power and the second power are selected such that a power per unit length is the same for each of the first and the second sections.
4. The device of claim 2 , wherein each of the first and the second sections has one or more electromagnetic cavities, and the first power and the second power are selected such that a power per cavity is the same for each of the first and the second sections.
5. The device of claim 2 , wherein the power system comprises:
a power source coupled to one of the first and the second power inputs; and
a coupler for coupling power to another of the first and the second power inputs.
6. The device of claim 5 , further comprising a circulator coupled to the power source.
7. The device of claim 1 , further comprising a phase shifter for adjusting a relative phase of electric field between the first and the second sections.
8. The device of claim 7 , wherein the phase shifter comprises a ±90° phase shifter.
9. The device of claim 1 , wherein the particle source comprises an electron source.
10. A device for generating a particle beam, comprising:
a particle source;
a structure having a first section and a second section, each of the first and the second sections having one or more electromagnetic cavities; and
a power system configured to deliver a first power to the first section, and a second power to the second section, such that a power per unit length or a power per cavity is approximately the same for the first and the second sections.
11. The device of claim 10 , wherein the power system comprises:
a power source coupled to one of the first and the second sections; and
a coupler for coupling power to another of the first and the second sections.
12. The device of claim 11 , further comprising a circulator coupled to the power source.
13. The device of claim 10 , further comprising a phase shifter for adjusting a relative phase of electric field between the first and the second sections.
14. The device of claim 13 , wherein the phase shifter comprises a ±90° phase shifter.
15. The device of claim 10 , wherein the first section has a length that is longer than that of the second section.
16. The device of claim 10 , wherein the first section has a length that is approximately the same as that of the second section.
17. The device of claim 10 , wherein the particle source comprises an electron source.
18. A device for generating a particle beam, comprising:
a particle source; and
a structure having a first section and a second section, the first section coupled to the particle source, the first section having a first power input, and the second section having a second power input;
wherein the first section is configured to produce a particle beam having a first energy E 1 , and the second section is configured to increase or decrease the first energy E 1 by an amount E 2 , an absolute value of E 2 being less than an absolute of E 1 .
19. The device of claim 18 , further comprising a power system for delivering a first power to the first section and a second power to the second section.
20. The device of claim 19 , wherein the first power and the second power are selected such that a power per unit length is the same for the first and the second sections.
21. The device of claim 19 , wherein each of the first and the second sections has one or more electromagnetic cavities, and the first power and the second power are selected such that a power per cavity is the same for the first and the second sections.
22. The device of claim 18 , further comprising a phase shifter for adjusting a relative phase of electric field between the first and the second sections.
23. The device of claim 22 , wherein the phase shifter comprises a ±90° phase shifter.
24. The device of claim 18 , wherein the particle source comprises an electron source.
25. The device of claim 18 , wherein the first section has a length that is longer than that of the second section.
26. The device of claim 18 , wherein the first section has a length that is approximately the same as that of the second section.
27. A method for generating a particle beam, comprising:
providing a structure having a first section and a second section, each of the first and the second sections having one or more electromagnetic cavities;
delivering a first power to the first section; and
delivering a second power to the second section;
wherein the steps of delivering are performed such that a power per accelerating cavity for the first section and a power per accelerating cavity for the second section are approximately the same.
28. The method of claim 27 , wherein the first section has a length that is longer than that of the second section.
29. A method for generating a particle beam, comprising:
providing a structure having a first section and a second section;
delivering a first power to the first section; and
delivering a second power to the second section;
wherein the steps of delivering are performed such that a power per unit length for the first section and a power per unit length for the second section are approximately the same.
30. The method of claim 29 , wherein the first section has a length that is longer than that of the second section.
31. A method for generating a particle beam, comprising:
providing a structure having a first section and a second section;
delivering a first power to the first section to produce a particle beam having a first energy E 1 ; and
delivering a second power to the second section to increase or decrease the first energy E 1 by an amount E 2 , an absolute value of E 2 being less than an absolute value of E 1 .
32. The method of claim 31 , wherein the first section has a length that is longer than that of the second section.
33. The method of claim 31 , wherein each of the first and the second sections has one or more electromagnetic cavities, and the steps of delivering are performed such that a power per cavity for the first section and a power per cavity for the second section are approximately the same.
34. The method of claim 31 , wherein the steps of delivering are performed such that a power per unit length for the first section and a power per unit length for the second section are approximately the same.
35. The method of claim 31 , wherein the particle beam comprises an electron beam.