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    • 1. 发明授权
    • Arrangement for automatically controlling the frequency of a
hyperfrequency generator feeding a resonant element subjected to
fluctuations in temperature
    • 用于自动控制供给受到温度波动的谐振元件的超频发生器的频率的布置
    • US4121173A
    • 1978-10-17
    • US768370
    • 1977-02-14
    • Guy AzamAndre BensussanClaude Levaillant
    • Guy AzamAndre BensussanClaude Levaillant
    • H01P7/06H03L7/04H05H7/02H05H9/00H03B3/04
    • H05H7/02H03L7/04
    • An arrangement enables the frequency variation of a resonant element (an accelerating section for example) to be followed in dependence upon its temperature and the frequency of the hyperfrequency generator G feeding this resonant element Q to be controlled in dependence upon the frequency variations thereof. The arrangement comprises at least one reference cavity C associated with means for allowing the circulation of cooling fluid along the walls of said reference cavity and with heat supply for bringing it, at any instant, to the temperature of the resonant element Q, means for measuring the amplitude variation .DELTA.a of the signal corresponding to the frequency variation of said reference cavity C in terms of its temperature variation and a frequency variation system controlled by a signal proportional to the amplitude variation .DELTA.a, for modifying the operating frequency of the generator G. This arrangement makes it possible to improve the performance of medical accelerators of which the thermal time constant is considerable in relation to their short operating time.
    • 根据其谐振元件(例如加速部分)的频率变化,可以根据其温度和频率发生器G的频率,根据其频率变化来馈送该谐振元件Q进行控制。 该装置包括至少一个参考空腔C,其与用于允许冷却流体沿着所述参考空腔的壁循环的装置和用于使其在任何时刻使其在谐振元件Q的温度下的热供应的装置相关联, 根据其温度变化,对应于所述基准空腔C的频率变化的信号的幅度变化量DELTA a和由与振幅变化量DELTA a成比例的信号控制的频率变化系统,用于修改发电机G的工作频率 这种布置使得可以提高热时间常数相对于其短的运行时间相当可观的医用促进剂的性能。
    • 4. 发明授权
    • Apparatus for irradiating a target on two opposite faces by means of an
accelerated charged particle beam
    • 用于通过加速带电粒子束在两个相对的面上照射靶的装置
    • US4201920A
    • 1980-05-06
    • US919551
    • 1978-06-27
    • Dominique TroncClaude Levaillant
    • Dominique TroncClaude Levaillant
    • G21K1/093G21K5/04H01J37/00
    • G21K5/04G21K1/093
    • Apparatus for irradiating the two opposite faces of a target by means of a scanning beam and comprising a magnetic deflection system formed by an electromagnet provided with two pole pieces disposed downstream of the target to be irradiated, the length of the pole pieces corresponding to the amplitude of the scanning beam in such a way that, if .theta.=.theta..sub.1 +.theta..sub.2 is the total scanning angle, the scanning beam of angle .theta..sub.1 impinges on one face of the target, while the scanning beam of angle .theta..sub.2 =.theta.-.theta..sub.1 is deflected in the magnetic deflection system and irradiates the other face, the polepieces having a face, so-called useful face, facing the other face of the target and comprising several sections with different curvatures for obtaining a reflected beam substantially perpendicular to this other face of the target.
    • 用于通过扫描光束照射目标的两个相对面的装置,包括由设置有两个极片的电磁体形成的磁偏转系统,所述两个极片设置在待照射的靶的下游,所述极片的长度对应于振幅 扫描光束的角度θθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθθ= θ1在磁偏转系统中偏转并照射另一面,所述极具有面,所谓有用面,面对目标的另一面,并且包括具有不同曲率的多个部分,以获得基本垂直于该偏转的反射光束 目标的另一面。
    • 7. 发明授权
    • Variable-reflectivity device for varying output power of microwave
generator
    • 用于改变微波发生器输出功率的可变反射装置
    • US3949328A
    • 1976-04-06
    • US560239
    • 1975-03-20
    • Claude Levaillant
    • Claude Levaillant
    • H01P5/04H01P1/22
    • H01P5/04
    • A microwave reflector device of small size, making it possible to deliver a predetermined quantity of the power generated by a high-power microwave generator, comprises a unidirectional element which imposes an appropriate constant load on the generator, and a reflector system constituted by a waveguide D tapped into the output waveguide T of the unidirectional element, said waveguide D being terminated at its free end by a metal plate carrying three quartz rods 10, 11, 12 designed to slide, parallel to the axis of the waveguide D, respectively in three metallic sleeves 13, 14, 15 having a circular shape and dimensioins such that they form cut-off waveguides at the operating frequency of the generator. The free end of each of the sleeves 13, 14, 15 provided with three respective rings 16, 17, 18 of absorber material.
    • 小尺寸的微波反射器装置使得能够传送由大功率微波发生器产生的预定量的功率可能包括在发生器上施加适当的恒定负载的单向元件和由波导构成的反射器系统 D被分接到单向元件的输出波导T中,所述波导D在其自由端处被金属板端接,金属板承载三个石英棒10,11,12,其设计成平行于波导D的轴线平行于三个 具有圆形形状和尺寸的金属套管13,14,15,使得它们在发电机的工作频率处形成截止波导。 每个套管13,14,15的自由端设置有吸收体材料的三个相应的环16,17,18。