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    Filament supply circuit for particle accelerator
    1.
    发明授权
    Filament supply circuit for particle accelerator 失效
    灯丝供应​​电路用于粒子加速器

    公开(公告)号：US3908160A

    公开(公告)日：1975-09-23

    申请号：US43822174

    申请日：1974-01-31

    Applicant: RADIATION DYNAMICS

    Inventor： THOMPSON JR CHESTER C ,  MALONE HOWARD F

    IPC: H02M7/10 ,  H05H5/02 ,  H02M7/00

    CPC classification number: H05H5/02 ,  H02M7/10

    Abstract: In a particle accelerator of the type employing AC primary power and a voltage multiplication apparatus to achieve the required high DC accelerating voltage, a filament supply circuit is powered by a portion of the AC primary power appearing at the last stage of the voltage multiplier. This AC power is applied across a voltage regulator circuit in the form of two zener diodes connected back to back. The threshold of the zeners is below the lowest peak-to-peak voltage of the AC voltage so that the regulated voltage remains constant for all settings of the adjustable acceleration voltage. The regulated voltage is coupled through an adjustable resistor and an impedance-matching transformer to the accelerator filament.

    Abstract translation: 在采用AC一次电源的粒子加速器和实现所需高直流加速电压的电压倍增装置中，灯丝供电电路由出现在电压倍增器的最后一级的一部分AC电力供电。 该交流电源以两个背靠背连接的齐纳二极管的形式施加在电压调节器电路上。 齐纳二极管的阈值低于交流电压的最低峰峰值电压，因此调节电压对可调加速电压的所有设置保持不变。 调节电压通过可调电阻器和阻抗匹配变压器耦合到加速器灯丝。

    Regulating electron beam emission
    4.
    发明专利
    Regulating electron beam emission 未知

    公开(公告)号：GB2178203A

    公开(公告)日：1987-02-04

    申请号：GB8615340

    申请日：1986-06-24

    Applicant: RADIATION DYNAMICS

    Inventor： MALONE HOWARD F

    IPC: H05H5/02 ,  H01J3/08 ,  H01J37/06 ,  H01J37/248 ,  H02M3/28 ,  H05G1/34 ,  G05F1/10 ,  H01J29/98

    Abstract: A system for regulating the electron beam emission of an accelerator has a filament whose temperature is controlled by pulse width modulation of the current flowing to the filament (8). A variable impedance transformer (4) serially connected between the filament and RF power source (4) is electronically switched between high and low impedance at a rate faster than the thermal time constant of the filament whereby the variations of current flowing in the filament are averaged by the thermal response time of the filament so that the temperature and electron emission level of the filament remain substantially constant. The impedance switching signal is generated in response to changes in current flowing in the high voltage coils of the accelerator. The pulse width can be modulated over a wide range to vary the electron current over a range greater than 2:1. The switching signal is transmitted across the high voltage gradient of the accelerator by an optical link including an LED coupled to a phototransistor (15) by a light pipe (16).

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