IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0544806
(2004-02-12)
|
등록번호 |
US-7259529
(2007-08-21)
|
우선권정보 |
JP-2003-037694(2003-02-17) |
국제출원번호 |
PCT/JP04/001470
(2004-02-12)
|
§371/§102 date |
20050808
(20050808)
|
국제공개번호 |
WO04/073364
(2004-08-26)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Mitsubishi Denki Kabushiki Kaisha
|
대리인 / 주소 |
Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
|
인용정보 |
피인용 횟수 :
117 인용 특허 :
4 |
초록
▼
The present invention provides a charged particle accelerator comprising a charged particle generating apparatus, a bending magnet, accelerating means and a vacuum duct, wherein first and second acceleration periods (22), (23) are provided, accelerating electric field of the accelerating means is ap
The present invention provides a charged particle accelerator comprising a charged particle generating apparatus, a bending magnet, accelerating means and a vacuum duct, wherein first and second acceleration periods (22), (23) are provided, accelerating electric field of the accelerating means is applied from the start time (25) of the first acceleration period (22) until the end time of the second acceleration period (23), and bending magnetic field is applied at a fixed value during the first accelerating period while, during the second acceleration period, it is applied so as to increase until the end time of the second acceleration period. Accordingly, there is provided a compact and high power charged particle accelerator which can perform large-current acceleration.
대표청구항
▼
The invention claimed is: 1. A charged particle accelerator comprising a charged particle generating apparatus, a bending magnet, accelerating means and a vacuum duct, characterized in that charged particles injected from the charged particle generating apparatus into the vacuum duct are bent by th
The invention claimed is: 1. A charged particle accelerator comprising a charged particle generating apparatus, a bending magnet, accelerating means and a vacuum duct, characterized in that charged particles injected from the charged particle generating apparatus into the vacuum duct are bent by the bending magnet and accelerated to have prescribed energy after passing through a first acceleration period and a second acceleration period, electric field generated by the accelerating means is applied from the start time of the first acceleration period until the end time of the second acceleration period, and magnetic field generated by the bending magnet is applied at a fixed value during the first acceleration period and applied while being increased until the end time of the second acceleration period. 2. The charged particle accelerator according to claim 1, wherein the accelerating means comprises an acceleration core and an acceleration core power source, and electric field generated by the accelerating means is an induced electric field caused by subjecting the acceleration core to alternating excitation. 3. The charged particle accelerator according to claim 2, wherein the excitation of the acceleration core for causing the accelerating means to generate electric field is applied so as to be set to a minus value at the first acceleration period start time and increase in a plus direction until the second acceleration period end time. 4. The charged particle accelerator according to claim 1, wherein an excitation pattern for electric field application of the accelerating means and magnetic field application of the bending magnet is set to be linear. 5. The charged particle accelerator according to claim 1, wherein an excitation pattern for electric field application of the accelerating means and magnetic field application of the bending magnet is set to be a curved line. 6. The charged particle accelerator according to claim 1, wherein an X-ray target is equipped in the vacuum duct, and when the charged particles are accelerated so that the energy thereof reaches predetermined energy, the charged particles are made to impinge against the X-ray target to generate X-rays. 7. The charged particle accelerator according to claim 1, wherein a deflector is equipped in the vacuum duct, and when the charged particles are accelerated so that the energy thereof reaches predetermined energy, the charged particles are extracted by the deflector. 8. The charged particle accelerator according to claim 1, wherein the charged particle generating apparatus is equipped substantially at the center portion of the charged particle accelerator. 9. A charged particle accelerator comprising a charged particle generating apparatus, a bending magnet, accelerating means and a vacuum duct, characterized in that charged particles injected from the charged particle generating apparatus into the vacuum duct are bent by the bending magnet and accelerated to have prescribed energy after passing through a first acceleration period and a second acceleration period, a beam extraction period linked to the second acceleration period is provided, electric field generated by the accelerating means is applied from the start time of the first acceleration period until the end time of the extraction period, and magnetic field generated by the bending magnet is applied at a fixed value during the first acceleration period, the magnetic field is increased until the end time of the second acceleration period during the second acceleration period, and the magnetic field is set to a terminal value of the second acceleration period which is kept constant during the extraction period. 10. The charged particle accelerator according to claim 9, wherein the accelerating means comprises an acceleration core and an acceleration core power source, and electric field generated by the accelerating means is an induced electric field caused by subjecting the acceleration core to alternating excitation. 11. The charged particle accelerator according to claim 9, wherein the excitation of the acceleration core for causing the accelerating means to generate electric field is applied so as to beset to a minus value at the first acceleration period start time and increase in a plus direction until the second acceleration period end time. 12. The charged particle accelerator according to claim 9, wherein an excitation pattern for electric field application of the accelerating means and magnetic field application of the bending magnet is set to be linear. 13. The charged particle accelerator according to claim 9, wherein an excitation pattern for electric field application of the accelerating means and magnetic field application of the bending magnet is set to be a curved line. 14. The charged particle accelerator according to claim 9, wherein an X-ray target is equipped in the vacuum duct, and when the charged particles are accelerated so that the energy thereof reaches predetermined energy, the charged particles are made to impinge against the X-ray target to generate X-rays. 15. The charged particle accelerator according to claim 9, wherein a deflector is equipped in the vacuum duct, and when the charged particles are accelerated so that the energy thereof reaches predetermined energy, the charged particles are extracted by the deflector. 16. The charged particle accelerator according to claim 9, wherein the charged particle generating apparatus is equipped substantially at the center portion of the charged particle accelerator. 17. A charged particle accelerator comprising a charged particle generating apparatus, a bending magnet, accelerating means and a vacuum duct, characterized in that charged particles injected from the charged particle generating apparatus into the vacuum duct are bent by the bending magnet and accelerated to have prescribed energy after passing through a first acceleration period and a second acceleration period, electric field generated by the accelerating means is applied from the start time of the first acceleration period until the end time of the second acceleration period, magnetic field generated by the bending magnet is applied so as to increase from the acceleration start time of the first acceleration period until the end time of the second acceleration period, and the energy of the charged particles emitted from the charged particle generating apparatus in the first acceleration period is varied.
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