초록 ▼

Synchrotron radiation is generated when a base of charged particles is bent by a bending magnet. The synchrotron radiation passes down a lead-out duct as the total number of pumps is limited by the size of the apparatus and many pumps are needed in order to achieve a good vacuum. An ion pump has a m

Synchrotron radiation is generated when a base of charged particles is bent by a bending magnet. The synchrotron radiation passes down a lead-out duct as the total number of pumps is limited by the size of the apparatus and many pumps are needed in order to achieve a good vacuum. An ion pump has a main magnetic field, normally generated by a magnet of the ion pump which controls the behavior of the electrons in the ion pump. However, the leakage magnetic field of the bending magnet affects the ion pump, and therefore the ion pump is arranged so that its main magnetic field is aligned with the leakage magnetic field at the ion pump, or at least with a main component thereof. In this way, the effect of the leakage magnetic field on the ion pump is reduced. Indeed, it is possible to use the leakage magnetic field as the main magnetic field of the ion pump.

대표청구항 ▼

1. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet also causing a leakage magnetic field to be generated; at least one duct for defining a path for synchrotr

1. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet also causing a leakage magnetic field to be generated; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct, said ion pump having field generation means for generating a main magnetic field for said ion pump; wherein said field generation means of said ion pump is located such that said main magnetic field is substantially aligned with a main component of said leakage magnetic field at said ion pump. 2. An apparatus according to claim 1, wherein said bending magnet is in the form of an arc, and said main component of said leakage magnetic field is radial of said arc. 3. An apparatus according to claim 1, wherein said bending magnet is in the form of an arc, and said main component of said leakage magnetic field is perpendicular to the plane of said arc. 4. An apparatus according to claim 1, wherein said leakage magnetic field has further components, and said ion pump has shielding for reducing said at least one of said further components of said leakage magnetic field. 5. An apparatus according to claim 1, wherein said ion pump has a casing of magnetic shielding material. 6. An apparatus according to claim 1, wherein said ion pump has at least one hollow cylindrical anode for electrons therein, and the longitudinal axis of said at least one cylindrical anode is substantially aligned with said main component of said leakage magnetic field. 7. An apparatus according to claim 1, wherein said ion pump has at least one anode plate having at least one hole therein, and the through axis of said at least one hole is substantially aligned with said main component of said leakage magnetic field. 8. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet also causing a leakage magnetic field to be generated; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct, said ion pump having field generation means for generating a main magnetic field for said ion pump; wherein said field generation means of said ion pump is located such that said main magnetic field is substantially aligned with the vector composite direction of said leakage magnetic field at the location of said ion pump. 9. An apparatus according to claim 8, wherein said ion pump has a casing of magnetic shielding material. 10. An apparatus according to claim 8, wherein said ion pump has at least one hollow cylindrical anode for containing electrons therein, and the longitudinal axis of said at least one cylindrical anode is substantially aligned with said vector composite direction. 11. An apparatus according to claim 8, wherein said ion pump has at least one anode plate having at least one hole therein, and the through axis of said at least one hole is substantially aligned with said vector composite direction. 12. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet being in the form of an arc; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct having field generation means for generating a main magnetic field for said ion pump; wherein said main magnetic field is substantially aligned with the radial direction of said arc of said bending magnet. 13. An apparatus according to claim 12, wherein said ion pump is spaced from said duct in a direction perpendicular to the plane of said arc. 14. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending electromagnetic field for a charged particle beam so as to bend said beam, said bending magnet being in the form of an arc; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct having field generation means for generating a main magnetic field for said ion pump; wherein said main magnetic field is aligned so as to be substantially perpendicular to the plane of said arc of said bending magnet. 15. An apparatus according to claim 14, wherein said ion pump is spaced from said duct in a direction parallel to said plane of said arc. 16. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam; a duct for defining a path for synchrotron radiation generated by said bending of said beam, said duct extending in a first direction; and an ion pump connected to said duct, said ion pump having field generation means for generating a main magnetic field for said ion pump; wherein said field generation means of said ion pump is located such that said main magnetic field is aligned in a second direction, said second direction being different from said first direction. 17. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet also causing a leakage magnetic field to be generated; at least one duct for defining a path for synchrotron radiation generation by said bending of said beam; and an ion pump for connecting to said at least one duct; said ion pump requiring a main magnetic field for the operation thereof; wherein said ion pump is located in said leakage magnetic field such that said leakage magnetic field forms said main magnetic field of said ion pump. 18. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet also causing a leakage magnetic field to be generated; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct, said ion pump having at least one hollow cylindrical anode for containing electrons therein; wherein the longitudinal axis of said at least one cylindrical anode of said ion pump is substantially aligned with a main component of said leakage magnetic field at said ion pump. 19. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet also causing a leakage magnetic field to be generated; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct, said ion pump having at least one hollow cylindrical anode for containing electrons therein; wherein the longitudinal axis of said at least one cylindrical anode of said ion pump is substantially aligned with the vector composite direction of said leakage magnetic field at the location of said ion pump. 20. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet being in the form of an arc; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct, said ion pump having at least one hollow cylindrical anode for containing electrons therein; wherein the longitudinal axis of at least one cylindrical anode of said ion pump is substantially aligned with the radial direction of said arc of said bending magnet. 21. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending electromagnetic field for a charged particle beam so as to bend said beam, said bending magnet being in the form of an arc; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct said ion pump having at least one cylindrical anode for containing electrons therein; wherein the longitudinal axis of said cylindrical anode of said ion pump is aligned so as to be substantially perpendicular to the plane of said arc of said bending magnet. 22. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam; a duct for defining a path for synchrotron radiation generated by said bending of said beam, said duct extending in a first direction; and an ion pump connected to said duct, said ion pump having at least one hollow cylindrical anode for containing electrons therein; wherein the longitudinal axis of said at least one cylindrical anode of said ion pump is aligned in a second direction, said second direction being different from said first direction. 23. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet also causing a leakage magnetic field to be generated; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct, said ion pump having at least one anode plate having at least one hole therein; wherein the through axis of said at least one hole of said at least one anode plate of said ion pump is substantially aligned with a main component of said leakage magnetic field at the location of said ion pump. 24. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet also causing a leakage magnetic field to be generated; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct, said ion pump having at least one anode plate having at least one hole therein; wherein the through axis of said at least one anode plate of said ion pump is substantially aligned with the vector composite direction of said leakage magnetic field at the location of said ion pump. 25. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field for a charged particle beam so as to bend said beam, said bending magnet being in the form of an arc; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct, said ion pump having at least one ion plate having at least one hole therein; wherein the through axis of said at least one hole is substantially aligned with the radial direction of said arc of said bending magnet. 26. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending electromagnetic field for a charged particle beam so as to bend said beam, said bending magnet being in the form of an arc; at least one duct for defining a path for synchrotron radiation generated by said bending of said beam; and an ion pump connected to said at least one duct said ion pump having at least one anode plate having at least one hole therein; wherein the through axis of said at least one hole is substantially perpendicular to the plane of said arc of said bending magnet. 27. A synchrotron radiation generation apparatus comprising: a bending magnet for generating a bending magnetic field on a charged particle beam so as to bend said beam; a duct for defining a path for synchrotron radiation generated by said bending of said beam, said duct extending in a first direction; and an ion pump connected to said duct, said ion pump having at least one hole therein; wherein the through axis of said at least one hole is aligned in a second direction, said second direction being different from said first direction. 28. A method of generating synchrotron radiation, comprising: generating a bending magnetic field and a leakage magnetic field; generating a main magnetic field in an ion pump connected to at least one duct; aligning said ion pump such that said main magnetic field of said ion pump is substantially aligned with a main component of said leakage magnetic field at at least said ion pump; causing a charged particle beam to bend due to said bending magnetic field, thereby to generate synchrotron radiation; and causing said synchrotron radiation to pass in said duct. 29. A method of generating synchrotron radiation, comprising: generating a bending magnetic field and a leakage magnetic field; generating a main magnetic field in an ion pump connected to at least one duct; aligning said ion pump such that said main magnetic field of said ion pump is substantially aligned with the vector composite direction of said leakage magnetic field at said ion pump; causing a charged particle beam to bend due to said bending magnetic field, and thereby to generate synchrotron radiation; and causing said synchrotron radiation to pass in said duct. 30. A method of generating synchrotron radiation, comprising: generating a ending magnetic field by means of a bending magnet in the form of an arc; generating a main magnetic field in an ion pump connected to at least one duct; aligning said ion pump such that said main magnetic field of said ion pump is substantially aligned with the radial direction of said arc of said bending magnet; causing a charged particle beam to bend due to said bending magnet, thereby to generate synchrotron radiation; and causing said synchrotron radiation to pass in said duct. 31. A method of generating synchrotron radiation, comprising: generating a bending magnetic field by means of a bending magnet in the form of an arc; generating a main magnetic field in an ion pump connected to at least one duct; aligning said ion pump such that said main magnetic field of said ion pump is substantially aligned perpendicular to the plane of said arc of said bending magnet; causing a charged particle beam to bend due to said bending magnet, thereby to generate synchrotron radiation; and causing said synchrotron radiation to pass in said duct. 32. A method of generating synchrotron radiation, comprising: generating a bending magnetic field and a leakage magnetic field; causing a charged particle beam to bend due to said bending magnetic field, thereby to generate synchrotron radiation; and causing said synchrotron radiation to pass in a duct; wherein said leakage field forms a main magnetic field for an ion pump connected to said duct. 33. A synchrotron radiation generation system comprising: a plurality of bending magnets, each for generating a bending magnetic field on a charged particle beam, thereby to define a looped path for said beam, each of said plurality of bending magnets also causing a leakage magnetic field to be generated; at least one duct for defining a path for synchrotron radiation generated by bending of said beam by one of said bending magnets; and an ion pump connected to said at least one duct, said ion pump having field generation means for generating a main magnetic field for said ion pump; wherein said field generation means of said ion pump is located such that said main magnetic field is substantially aligned with a main component of said leakage magnetic field of said one of said bending magnets at said ion pump. 34. A synchrotron radiation generation system comprising: a plurality of bending magnets, each for generating a bending magnetic field on a charged particle beam, thereby to define a looped path for said beam, each of said plurality of bending magnets also causing a leakage magnetic field to be generated; at least one duct for defining a path for synchrotron radiation generated by bending of said beam by one of said bending magnets; and an ion pump connected to said at least one duct, said ion pump having field generation means for generating a main magnetic field for said ion pump; wherein said field generation means of said ion pump is located such that said main magnetic field is substantially aligned with the vector composite direction of said leakage magnetic field at the location of said ion pump.