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21. 发明专利

JPH04332434A GYROTRON DEVICE 失效
公开(公告)号：JPH04332434A
公开(公告)日：1992-11-19
申请号：JP10144391
申请日：1991-05-07
申请人： JAPAN ATOMIC ENERGY RES INST , TOSHIBA CORP
发明人： SAKAMOTO KEIJI , NAGASHIMA TAKASHI , KARIYA TSUYOSHI
IPC分类号： H01J25/00
摘要： PURPOSE:To provide a gyrotron device which can be constructed in a compactsize because there is no need to additionally lay any pipe for each of cooling-medium paths even if each mirrors is heated when the gyrotron device is operated by large electric power, and in which members constructing the mirrors can be sufficiently cooled and therefore a highly reliable operating characteristics can be obtained. CONSTITUTION:A gyrotron device has mirror 7, 8 which are arranged between a collector portion 12 and a resonant-cavity portion 4 and extended along the direction of the axis of a tube in order to convert the traveling direction of an electromagnetic wave semi-optically to a direction different from the traveling direction of a electron beam. Cooling-medium paths 18, 19, 20, 21 are formed inside the members constructing the mirrors.

22. 发明专利

JPH04192240A GYROTRON DEVICE 失效
公开(公告)号：JPH04192240A
公开(公告)日：1992-07-10
申请号：JP32374790
申请日：1990-11-27
申请人： JAPAN ATOMIC ENERGY RES INST , TOSHIBA CORP
发明人： SAKAMOTO KEIJI , NAGASHIMA TAKASHI , MITSUNAKA YOSHIKA
IPC分类号： G21B1/05 , H01J23/12 , H01J23/54 , H01J25/00 , H01J25/02
摘要： PURPOSE:To prevent oscillating operations and outputs thereof from being unstable due to spurious milli-waves by providing a milli-wave absorbing means absorbing spurious milli-waves generated by the circuit loss of a mode converter. CONSTITUTION:A gyrotron device is provided with a milli-wave absorbing material layer 21 composed of a solid conductive layer such as silicone carbide and the like which absorb milli-waves, in a region enclosing a semi-optical mode converter 7 and in a region which does not interfere with the emission of milli-wave beams 8 in the inner circumferential surface of a converter wall 10 forming a space which houses the semi-optical mode converter 7. In this constitution, most of spurious milli-waves generated by the circuit loss of the mode converter 7 are absorbed by the layer 21. This can thereby prevent useless milli-waves from coming in a cavity resonator 3 and an electron gun 1, thereby making it possible oscillating operations and outputs thereof.

23. 发明专利

JPH03241901A MULTI-OUTPUT TYPE VLASOV ANTENNA 失效
公开(公告)号：JPH03241901A
公开(公告)日：1991-10-29
申请号：JP3917990
申请日：1990-02-19
申请人： JAPAN ATOMIC ENERGY RES INST , TOSHIBA CORP
发明人： SAKAMOTO KEIJI , OKAZAKI YUKIO
IPC分类号： H05H7/02 , G21B1/00 , G21B1/11 , H01P1/16 , H01P5/08
摘要： PURPOSE:To allow an in-guide electromagnetic wave to radiate in space as beams of plural electromagnetic waves by providing plural notches in parallel with the axis and in axis symmetry from which beams of plural electromagnetic waves in the corridor mode to a circular waveguide in a millimeter and a sub-millimeter wave band. CONSTITUTION:Plural notches 20 for electromagnetic wave radiation are provided to a vlasov antenna 21 to divide an output. An electromagnetic wave of the corridor mode in a waveguide travels unidirectionally while being reflected on a wall face and a beam overriding the radiation notch radiates externally as it is. n-Set of the notches are provided in axis symmetry to divide the power of the electromagnetic wave into (n) equally and the electromagnetic wave radiates externally with a radiation pattern of axis symmetry. The radiating electromagnetic wave is converted into a beam transmission Gauss beam at the n-set of reflection plates respectively and led to the outside of the oscillator via an output window. Thus, the output is divided in many numbers and the passing high frequency power is decreased into 1/n and the thermal load of the output window is reduced.

24. 发明专利

JP2000306519A MICROWAVE/DC POWER CONVERTER 失效
公开(公告)号：JP2000306519A
公开(公告)日：2000-11-02
申请号：JP11342299
申请日：1999-04-21
申请人： JAPAN ATOMIC ENERGY RES INST
发明人： SAKAMOTO KEIJI
IPC分类号： H01J25/00 , H02J15/00 , H02M7/06
摘要： PROBLEM TO BE SOLVED: To enable an eletromagnetic wave in a microwave band including a millimeter wave band, in particular, an eletromagnetic wave having large electric power to be converted into DC power with high efficiency. SOLUTION: In a microwave/DC power converter 1, a magnetostatic field is applied to an interacting portion 14 of a waveguide by a magnetic field coil 30, and an electron beam 100 is accelerated by always subjecting the electron beam 100 generated by an electron gun 12 to electron cyclotron automatic resonance with a microwave 102 introduced form the outside. Consequently, electric power of the microwave is converted into electric power of the electron beam. Furthermore, the electron beam is electrostatically decelerated by a DC voltage generated by a load resistance 40, whereby the DC power is taken out to the outside.

25. 发明专利

JPH0428148A GYROTRON WITH BUILT-IN MODE CONVERTER 失效
公开(公告)号：JPH0428148A
公开(公告)日：1992-01-30
申请号：JP13360890
申请日：1990-05-23
申请人： JAPAN ATOMIC ENERGY RES INST
发明人： SAKAMOTO KEIJI
IPC分类号： H01J25/00
摘要： PURPOSE:To enable the output of an electromagnetic wave beam having a Gaussian electromagnetic field distribution of an excellent high frequency trans mission characteristic by arranging a mode converter, a radiator to radiate a high frequency electric power to the outside of a gyrotron at the downstream of the mode converter through an output window section and a reflecting plate. CONSTITUTION:An electron beam emitted from an electron gun 41 enters a resonating cavity section 44 through an electron beam inducing section 43 by being guided in a strong magnetic field in the axial direction, and the energy of the electron beam is converted into an electromagnetic wave energy. After this, the electron passes through a mode converter 45 and a radiator 46, and is absorbed in a collector 48. A corridor mode huge electric power high frequency generated in the resonating cavity section is mode-converted from a corridor mode into a mode symmetrical to a circular axis by means of a Thumn type converter 45, and is radiated toward a reflecting plate 47 with the radiator 46 being cut stepwise or obliquely, and outputted outside as a Gaussian electromagnetic wave through an outputting ceramic window 50.

26. 发明专利

JPH01187737A GYROTRON 失效
公开(公告)号：JPH01187737A
公开(公告)日：1989-07-27
申请号：JP1015888
申请日：1988-01-20
申请人： JAPAN ATOMIC ENERGY RES INST
发明人： SAKAMOTO KEIJI , NAGASHIMA TAKASHI , OKAZAKI YUKIO
IPC分类号： H01J25/00
摘要： PURPOSE:To restrain a high-frequency circuit wall from deforming as well as make excellent exhaust efficiency attainable by providing an outer surrounding cylinder having a higher mechanical strength than that of copper and hermetically sealing the circuit wall and the outer surrounding cylinder through thin wall flexible parts. CONSTITUTION:A high-frequency circuit part is provided with a copper long-size cylindrical circuit wall 12 and, while providing a space for exhausting around it, an outer surrounding cylinder 21 having a higher mechanical strength than that of copper. The high-frequency circuit wall 12 and the outer surrounding cylinder 21 are hermetically sealed through thin wall rings 47 and 50 having flexible parts 48 and 51, and a pair of flanges 46 and 49 fixed to the both sides of these flexible parts 48 and 51 are mechanically connected in a body. Therefore, the thermal expansion difference between the high-frequency circuit wall 12 and the outer surrounding cylinder 21 can be absorbed by the flexible parts 48 and 51 of thin wall rings, so the mechanical strength can be maintained by the outer surrounding cylinder 21 because of a little thermal expansion difference between the both members in the completion stage. Thereby, the center axis of the high-frequency circuit wall 12 is prevented from bending and the circuit wall 12 is prevented from partial deforming. In addition, the space for exhausting becomes a gas passage inside pipe, so the gas inside pipe can be exhausted with high efficiency during exhausting and operation, and a steady operation under high vacuum can be maintained.

27. 发明专利

JPH0286031A GYROTRON 失效
公开(公告)号：JPH0286031A
公开(公告)日：1990-03-27
申请号：JP23534588
申请日：1988-09-20
申请人： JAPAN ATOMIC ENERGY RES INST
发明人： NAGASHIMA TAKASHI , SAKAMOTO KEIJI , OKAZAKI YUKIO
IPC分类号： H01J23/40 , H01J23/00 , H01J25/00
摘要： PURPOSE:To suppress the leakage of microwaves and efficiently perform the exhaust of an output window section by connecting the inside gap of an insulating ring between a collector section and the output window section to a vacuum chamber and communicating it to the space in an output side wave guide with slits. CONSTITUTION:A gap 34 inside a ceramic insulating ring 26 between a collector section 15 and an output window section 16 is communicated to a vacuum chamber 35 around a collector section wave guide wall 18b. Ventilating slits 37 are provided at the end section of this wave guide wall 18b to face the wave guide wall 18c of the output window section at a gap G, and a connecting flange 23b with high mechanical strength and welding thin flanges 23c and 23d are integrally provided on the outer periphery of the wave guide wall 18c. Sealing rings 27 and 28 are brazed on both faces of the insulating ring 26. Flanges 23a and 23b are connected with the insulating ring 26, a bolt 31 and a nut 32. The exhaust of the inside gap of the insulating ring is efficiently performed with such a simple structure, and the mechanical strength can be thoroughly maintained.

28. 发明专利

JPH0864144A POWER SOURCE FOR GYROTRON DEVICE WITH OVERVOLTAGE RESTRICTING MEANS FOR GYROTRON BODY PART 失效
公开(公告)号：JPH0864144A
公开(公告)日：1996-03-08
申请号：JP19422094
申请日：1994-08-18
申请人： JAPAN ATOMIC ENERGY RES INST
发明人： TSUNEOKA MASAKI , SAKAMOTO KEIJI , IMAI TAKESHI , KASUGAI ATSUSHI
IPC分类号： H01J23/34
摘要： PURPOSE: To prevent and restrict the overvoltage to be generated in a body part by limiting the electrical potential of the body part at the predetermined potential difference in relation to a collector part, and applying voltage with a power supplying unit. CONSTITUTION: At the initial time of a rise of power supplying power sources 22, 24, since the output voltage of an accelerating power source 20 does not rise, electrical potential of a body part 10 is equal with the electrical potential of a cathode electrode 4. A negative potential difference equal with the output voltage during the rise of the power source 24 is generated in the body part 10, and a negative potential difference equal with the output voltage during the rise of the power source 22 in relation to the electrical potential of a collector part 12 is generated. After the power source 24 perfectly rose, the power source 20 rises, and when the electrical potential of the body part 10 becomes higher than the electrical potential of the collectors 12, 14, diodes 100, 110 are cut off. Potential difference between the body part 10 and the collectors 12, 14 is limited so that the negative overvoltage of the collectors 12, 14 is not applied to the body part 10. Consequently, the body part 10, or a part near the body part 10 or a strong magnetic field coil 18 is not damaged.

29. 发明专利

JPH04230899A GENERATION OF PERIODIC MAGNETIC FIELD 失效
公开(公告)号：JPH04230899A
公开(公告)日：1992-08-19
申请号：JP12169891
申请日：1991-05-28
申请人： HITACHI METALS LTD , JAPAN ATOMIC ENERGY RES INST
发明人： KURIYAMA YOSHIHIKO , SAKAMOTO KEIJI , MAEHARA SUNAO , KISHIMOTO YASUAKI
IPC分类号： G21K1/093 , H01S3/30 , H05H7/04
摘要： PURPOSE:To offer a generating device of a periodic magnetic field with improved focusing function by preventing diffusion of electron beam. CONSTITUTION:A region is formed so as to make the region exist, where distance between magnetic poles facing to magnetic gap, is decreasing along with departing gradually and rectangularly to flow direction of electron beam and a center line of magnetic poles of a permanent magnet, from a center of the electron beam. When a center axis of the electron beam is a z axis, a center line of NS magnetic poles crossing the z axis orthogonally, is a y axis, and an axis orthogonally crossing the z and the y axes, is an x axis, the outline of the magnetic pole face of the permanent magnet is formed by a curve expressed by following equations: cosh(Kw./sq. rt. 2).sinh(Kw.y/sq. rt. 2)=Co (eq. 1) where, Kw=2pi/lambdaw and lambdaw is the wiggler period Co=sinh(Kw.yo/sq. rt. 2) (eq. 2) where, y0 is the distance to the magnetic pole face on the y axis, at x=0.

30. 发明专利

JPH04150401A MODE-COUPLED TYPE DIRECTIONAL COUPLER 失效
公开(公告)号：JPH04150401A
公开(公告)日：1992-05-22
申请号：JP27378390
申请日：1990-10-12
申请人： JAPAN ATOMIC ENERGY RES INST , MITSUBISHI ELECTRIC CORP
发明人： SAKAMOTO KEIJI , GOTO MASAHARU , NAGASHIMA TAKASHI , NAKAMURA NAOKI
IPC分类号： H01P1/16 , H01P5/18
摘要： PURPOSE:To increase the degree of coupling of plural auxiliary waveguides with a circular main waveguide even to a high frequency exceeding 100GHz so that the electric power made incident to and reflected by the circuit waveguide can be monitored exactly by providing the plural auxiliary waveguides against the circular main waveguide and providing plural sets of coupling holes in each auxiliary waveguide, with each set of the coupling holes being composed of plural holes. CONSTITUTION:On one auxiliary waveguide 3 side in the figure, the coupling holes 2 are provided at intervals l1 and each two adjacent holes constitute one set. A total of N sets of holes 2 is provided at regular intervals l2, with the total number of the holes 2 being 2N. On the other auxiliary waveguide 3a side, the holes 2a are provided at regular intervals l3 and each adjacent holes constitute one set. A total of N sets of holes 2a are provided at regular intervals of l4. When the auxiliary waveguides 3 and 3a are constituted in such way, the TE10 mode can be monitored from the intervals l1 and l2 satisfying a specific relation on one auxiliary waveguide 3 which uses the propagation mode of the main waveguide 1 as a TE04 mode and the incident power can be monitored at an opened end 5b.

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