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    • 7. 发明授权
    • CW particle accelerator with low particle injection velocity
    • CW粒子加速器具有低粒子注入速度
    • US5744919A
    • 1998-04-28
    • US764535
    • 1996-12-12
    • Andrey V. MishinRussell G. Schonberg
    • Andrey V. MishinRussell G. Schonberg
    • H05H9/00H05H7/00
    • H05H9/00
    • An RF linear accelerator using CW or low amplitude pulsed RF excitation which can efficiently accelerate charged particles from 0.1 C to relativistic velocities in excess of 0.9 C. A charged particle source feeds charged particles having velocities of about 0.1 C into a first type RF LINAC having a plurality of side coupled resonator cavities each having a drift tube in the middle. The RF length of the cavities is set relative to the velocity of the particles and the RF excitation wavelength such that the particles experience in-phase accelerating E fields in the gaps on either side of the drift tube and are shielded from decelerating E fields while inside the drift tubes. The RF coupling cavities establish sufficient phase change between adjacent resonators such that the particles arrive in the adjacent resonator cavities in synchronization with oscillations in the standing wave therein so as to experience further acceleration. The first RF LINAC accelerates the particles to 0.5 C approximately. The charged particles are then passed through a conventional RF LINAC with a CW source which is optimized to accelerate the particles from 0.5 C to relativistic velocities. A variable phase change RF coupler couples the RF between the first RF LINAC and the second RF LINAC such that a variable degree of synchronization can be achieved such that the energy of the particle beam exiting said second RF LINAC can be modulated by varying the phase change. A conventional CW RF LINAC is also disclosed with a duty cycle controlling system for operating the RF and charged particle sources with variable duty cycles so as to achieve control of average beam power and enable higher momentary beam energies than would otherwise be the case for CW LINACs.
    • 使用CW或低幅度脉冲RF激发的RF线性加速器,其可以将带电粒子从0.1C有效地加速到超过0.9C的相对速度。带电粒子源将具有约0.1C速度的带电粒子馈送到具有 多个侧耦合谐振腔,每个在中间具有漂移管。 空腔的RF长度相对于颗粒的速度和RF激发波长设定,使得颗粒在漂移管的任一侧上的间隙中经历同相加速的E场,并且在内部被屏蔽以减速E场 漂移管。 RF耦合腔在相邻谐振器之间建立足够的相变,使得颗粒与驻波中的振荡同步地到达相邻的谐振腔,以便经历进一步的加速。 第一台RF LINAC将颗粒加速到0.5C左右。 然后将带电粒子通过经过优化的用于将颗粒从0.5C加速到相对速度的CW源的常规RF LINAC。 可变相变RF耦合器将RF耦合在第一RF LINAC和第二RF LINAC之间,使得可以实现可变程度的同步,使得可以通过改变相位变化来调制离开所述第二RF LINAC的粒子束的能量 。 还公开了一种常规的CW RF LINAC,其具有用于以可变占空比操作RF和带电粒子源的占空比控制系统,以便实现平均波束功率的控制,并且能够实现比CW LINAC的情况更高的瞬时波束能量 。
    • 10. 发明授权
    • Hollow-beam microwave linear accelerator
    • 中空微波线性加速器
    • US5811943A
    • 1998-09-22
    • US717859
    • 1996-09-23
    • Andrey MishinRussell G. Schonberg
    • Andrey MishinRussell G. Schonberg
    • H05H9/04
    • H05H9/04
    • A linear accelerator for charged particles includes a plurality of accelerating stages in a linear arrangement along a central axis. Each accelerating stage has at least one passageway radially spaced from the central axis for transmitting a beam of charged particles. Electromagnetic wave energy is coupled to the accelerating stages to produce an accelerating electric field in a region of the passageway of each of the accelerating stages. Coupling circuits couple the electromagnetic wave energy between adjacent accelerating stages. Each accelerating stage may be configured as an annular accelerating cavity or as two or more accelerating cavities disposed around the central axis. The passageway may be configured as two or more discrete apertures or a single annular aperture. Beam bending devices may be used to direct the charged particle beam through the accelerator two or more times. The linear accelerator produces a high current, high energy charged particle beam.
    • 用于带电粒子的线性加速器包括沿着中心轴线性布置的多个加速级。 每个加速阶段具有至少一个与中心轴线径向隔开的通道,用于传送带电粒子束。 电磁波能耦合到加速级,以在每个加速级的通道的区域中产生加速电场。 耦合电路耦合相邻加速级之间的电磁波能量。 每个加速阶段可以被配置为环形加速腔或者围绕中心轴设置的两个或更多个加速腔。 通道可以被配置为两个或更多个离散孔或单个环形孔。 光束弯曲装置可用于将带电粒子束引导通过加速器两次或更多次。 线性加速器产生高电流,高能量带电粒子束。