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1. 发明专利

JPH01146300A CHARGED PARTICLE ACCUMULATION RING 失效
公开(公告)号：JPH01146300A
公开(公告)日：1989-06-08
申请号：JP30314387
申请日：1987-12-02
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： TSUMAKI KOJI , NISHI MASATSUGU , NAKADA JOJI , NAKAJIMA MASAYUKI
IPC分类号： H05H7/04 , H05H13/04
摘要： PURPOSE:To make it possible to hold the dislocation of a closed orbit below several millimeters and to adjust the compensation amount for the orbit disloca tion by adding new iron cores to upper and lower iron cores of a deflection magnet. CONSTITUTION:Adding new iron cores BF1, BF2 to upper and lower iron cores B1, B2 of a deflection magnet, parts of the respective iron cores BV1, BV2 are made vertically movable. Since a magnetic field of the direction opposite to that of the deflection magnet is produced on the newly added iron core section and the orbit is bent outward, effects of bending outward and inward by a fringe magnetic field offset each other. As a result, the orbit is parallel to an ideal orbit near the inlet of the deflection magnet and orbit dislocation is also small. Therefore, the dislocation of a closed orbit within the deflection magnet can be also made as small as within several millimeters. The compensa tion amount of the orbit can be adjusted by changing the magnetic field intensity by changing the magnetic pole gap of the iron magnetic poles newly added.

2. 发明专利

JPS642300A ELECTRON STORAGE RING 失效
公开(公告)号：JPS642300A
公开(公告)日：1989-01-06
申请号：JP15548887
申请日：1987-06-24
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： TSUMAKI KOJI , NISHI MASATSUGU , KITAMURA MASAJI , NAKADA JOJI , NAKAJIMA MASAYUKI
IPC分类号： H05H13/04 , G21K1/093 , H05H7/04 , H05H7/06
摘要： PURPOSE:To aim at reduction in slippage of a closed orbit due to a fringe magnetic field by installing each of iron magnetic poles whose one ends are connected to iron cores of a deflecting magnet so as to surround a superconducting coil, and other ends are set up so as to be opposed to each other with the orbital top as the center. CONSTITUTION:Iron cores BF1 and BF2 are added anew to both upper and lower iron cores B1 and B2 and connected to a deflecting magnet so as to surround a superconducting coil 1. Respective one ends H1 and H2 of these two new iron magnetic poles BF1 and BF2 are connected to the iron cores B1 and B2 of the deflecting magnet, and other ends I1 and I2 are set up so as to be opposed to each other in holding an orbital surface in between. And, a magnetic field is formed on the orbital surface by these new iron magnetic poles I1 and I2. With this constitution, no magnetic flux is leaked to the outside from these new iron magnetic poles BF1 and BF2, and a magnetic field in the reverse direction to the deflecting magnet can be formed in a new iron magnetic pole part 5, thus orbital slippage is corrected.

3. 发明专利

JPS6459800A INCIDENCE DEVICE OF CHARGED PARTICLE ACCUMULATION RING 失效
公开(公告)号：JPS6459800A
公开(公告)日：1989-03-07
申请号：JP21541887
申请日：1987-08-31
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： TSUMAKI KOJI , NISHI MASATSUGU , NISHIMURA KAZUYOSHI , SHIBAYAMA AKINORI , HOSOKAWA TERUO
IPC分类号： H05H7/08 , H05H13/04
摘要： PURPOSE:To reduce charged particles which impinge on an inflector to be lost and to upgrade incident efficiency by evaporating a metal on a part along a charged particle orbit plane of an electrode on a charged particle accumulation ring side of the inflector and forming a thin film. CONSTITUTION:An inflector 24 is composed of a cathode 11, an anode 12, a spacer 13, and the like. One part of the cathode 14 is made of a thin film of metallic evaporation. Charged particle beams are turned on a closed orbit inside the accumulation ring while their oscillation is repeated. On an incident operation, a perturbator 25 is used to make an orbit of the beams identified with that of incident charged particles and gradually returned to an original orbit. When the incident charged particles of large energy pass through the inflector 24 and make a round of the accumulation ring, their orbit is located outside a closed orbit 30 end they impinge on a thin film part 14 of the inflector 24. However, the charged particles pass therethrough because of their high energy. At that time, energy loss is small and the passing particles are not affected and the incident charged particles are not lost.

4. 发明专利

JPH03170098A DEFLECTING MAGNET OF CHARGED PARTICLE DEVICE AND CHARGED PARTICLE DEVICE CONTAINING THIS MAGNET 失效
公开(公告)号：JPH03170098A
公开(公告)日：1991-07-23
申请号：JP30863189
申请日：1989-11-28
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： MIYATA KENJI , HIRAMOTO KAZUO , HIROTA JUNICHI , AKIYAMA HIROSHI , NISHI MASATSUGU , KAKIUCHI SHUNJI , KITAYAMA TOYOKI , HAYASAKA TOA
IPC分类号： G21K1/093 , H01F6/00 , H05H7/04
摘要： PURPOSE:To simplify the construction over the entire part of the charged particle device by adding a change in the constitution of deflecting magnets and correcting the distortion in the equil. orbit of a charged particle by the effect of the deflecting magnets themselves. CONSTITUTION:The angle theta1 formed by both end faces 3 of the deflecting magnets 1 is determined dependently upon the distribution state of the leak magnetic fields generated at both end faces of the deflecting magnets 1. Since the BL product is proportional to a deflection angle according to such constitution, the distortion in the equil. orbit is decreased without using a correcting coil. Namely, the deviation with the equil. orbit can be decreased to a lower level by the structure of the deflecting magnets themselves in the small-sized accelerator having two pieces of the deflecting magnets 1 and, therefore, the need for a correction coil which is heretofore considered necessary is eliminated and since fewer steering magnets are necessitated, the accelerator is produced small in size over the entire part at a low cost.

5. 发明专利

JPH01146298A CHARGED PARTICLE DEFLECTOR 失效
公开(公告)号：JPH01146298A
公开(公告)日：1989-06-08
申请号：JP30314187
申请日：1987-12-02
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： MIYATA KENJI , HIROTA JUNICHI , NISHI MASATSUGU , SHIBAYAMA AKINORI , NISHIMURA KAZUYOSHI
IPC分类号： G21K1/087 , H05H7/18
摘要： PURPOSE:To reduce spatial dispersion and energy dispersion of particles by expanding the end portion of the outlet side of opposing electrodes thereby decreasing the curvature of electric lines of force between the opposing electrodes on the outlet side of a deflector. CONSTITUTION:Outlet end portions 110, 120 of opposite electrodes 11, 12 of an electric field type deflector are made wider open. In this case, the end portion 120 is expanded to the extent that the change in the electric field intensity does not increase its spatial dispersion, and the expansion is made smoothly so that no local electric field concentration is produced. With this constitution of the opposite electrodes 11, 12, the group of charged particles 100 advances approximately along a beam orbit 15. Since the gap between the electrode end portions 110, 120 is wider near the outlet, the curvature of the electric lines of force 140 is weaker in comparison with conventional devices. As a result, increase in the spatial dispersion and energy dispersion of particles due to nonuniform electric field can be suppressed.

6. 发明专利

JPH01143199A ACCELERATION METHOD FOR SYNCHROTRON AND CIRCULAR ACCELERATOR 失效
公开(公告)号：JPH01143199A
公开(公告)日：1989-06-05
申请号：JP30023587
申请日：1987-11-30
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： HIROTA JUNICHI , MIYATA KENJI , NISHI MASATSUGU , SHIBAYAMA AKINORI
IPC分类号： H05H7/02 , H05H13/04
摘要： PURPOSE:To enable synchrotron acceleration on a large amount of electric current without any beam loss by controlling a de-tuning amount and a high- frequecy power so as to correspond to the energy change of charged particles at the time of the synchrotron acceleration of the charged particles. CONSTITUTION:A de-tuning amount and a high-frequency power necessary at the time of the synchrotron acceleration of charged particles are so controlled as to correspond to the energy change of the charged particles without any change of an oscillation frequency. Namely, if the charged particles are accelerated while the high-frequency power and the de-tuning amount are being controlled within the phase stabilization region of the synchrotron oscillation of the charged particles, it becomes possible to accelerate a charged particle beam without any beam loss during the acceleration. A large amount of electric current, therefore, can be accelerated up to targeted final energy without any beam loss in a process of acceleration.

7. 发明专利

JPH01146299A CHARGED PARTICLE ACCUMULATION RING 失效
公开(公告)号：JPH01146299A
公开(公告)日：1989-06-08
申请号：JP30314287
申请日：1987-12-02
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： TSUMAKI KOJI , NISHI MASATSUGU , NAKADA JOJI , NAKAJIMA MASAYUKI
IPC分类号： H05H7/04 , H05H13/04
摘要： PURPOSE:To reduce load on a 6-pole magnet for correcting chromatic aberration by arranging an iron shield for guiding leakage magnetic field from a deflection magnet into a 4-pole magnet on the orbit axis of charged particles. CONSTITUTION:An iron shield 14 placed on an orbit axis is connected to a 4-pole magnet 12 constituting a focusing magnet and a non-focusing magnet to concentrate leakage magnetic field of a deflection magnet 11 on the orbit axis onto the 4-pole magnet 12. Since the magnetic permeability of the iron placed on the orbit axis is large, the leakage magnetic field passes through the iron and is led to the 4-pole magnet 12. Since the magnetic poles of the 4-pole magnet are of the shape as shown in the figure, 6-pole magnetic field components are produced. This makes it possible to reduce chromatic aberration produced by the 4-pole magnet and to reduce load on the 6-pole magnet used for correcting chromatic aberration in the past.

8. 发明专利

JPH11312600A CHARGED PARTICLE BEAM EMITTING APPARATUS 失效
公开(公告)号：JPH11312600A
公开(公告)日：1999-11-09
申请号：JP7496299
申请日：1999-03-19
申请人： HITACHI LTD
发明人： TADOKORO MASAHIRO , HIRAMOTO KAZUO , HIROTA JUNICHI , NISHI MASATSUGU
IPC分类号： G21K5/04 , A61N5/10 , H05H7/10 , H05H13/04
摘要： PROBLEM TO BE SOLVED: To provide a charged particle beam emitting apparatus which is capable of emitting a charged particle beam with high efficiency. SOLUTION: A high frequency signal generator 11 generates a high frequency signal 15 having a plurality of frequency components, the high frequency signal 15 being applied to an electrode 7 as a high frequency voltage 16 after having been adjusted by a gain controller 13 to the amplitude which should be applied to the electrode 7. The electrode 7 generates a high frequency electromagnetic field corresponding the high frequency voltage 16 applied and applies it to a charged particle beam.

9. 发明专利

JPH11312599A METHOD FOR EMITTING CHARGED PARTICLE BEAM AND EMITTING DEVICE THEREFOR 失效
公开(公告)号：JPH11312599A
公开(公告)日：1999-11-09
申请号：JP7496199
申请日：1999-03-19
申请人： HITACHI LTD
发明人： TADOKORO MASAHIRO , HIRAMOTO KAZUO , HIROTA JUNICHI , NISHI MASATSUGU
IPC分类号： G21K5/04 , A61N5/10 , H05H7/10 , H05H13/04
摘要： PROBLEM TO BE SOLVED: To control the quantity of radiation of a charged particle beam to the required value of quantity of radiation. SOLUTION: In an irradiation chamber 9, the quantity of radiation is measured by a radiation monitor 8. A comparator 12 compares the measurement 17 of the quantity of radiation, which is outputted from the radiation monitor 8 with a set value 14b of the quantity of radiation which is outputted from a controller 10, and a gain control signal 18 is outputted to a gain controller 13 so that the measurement 17 attains the set value 14b. The amplitude of a high frequency voltage 16 applied to an electrode 7 is controlled.

10. 发明专利

JPH097798A ACCELERATING TUBE AND ACCELERATOR 失效
公开(公告)号：JPH097798A
公开(公告)日：1997-01-10
申请号：JP15773795
申请日：1995-06-23
申请人： HITACHI LTD
发明人： AKIYAMA HIROSHI , NISHI MASATSUGU , MATSUMOTO HIROSHI
IPC分类号： H05H7/14 , H05H7/18 , H05H9/00
摘要： PURPOSE: To obtain an accelerating tube which suppresses a dark current generated in the accelerating tube, and has a high electric field and little dark current. CONSTITUTION: When a high-frequency wave power 1 is inputted to the inside of an accelerating tube 20 through a waveguide 2 and a combined window 3, an accelerating high-frequency wave electric field shown in an electric line of force 5 is generated in an accelerating tube combining unit 4 by the high-frequency wave power 1. By the generated high-frequency wave electric field, electrons are drawn out and accelerated by the field emission from the metal of the inner wall surface of the accelerating tube 20, and the electrons strike to the inner wall of the accelerating tube 20 so as to generate the secondary electrons. As the material of the parts 4a, 22a, and the like of their striking, a material 9 whose secondary electron emission coefficient is smaller than '1' is used. Consequently, the number of the generated secondary electrons is made fewer than the number of the striking electrons, and the breeding of the electrons can be suppressed.

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