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237 条记录 (耗时 0.014 秒)

    Bipolar crossed-field device including electromagnetic coils of the same polarity
    1.
    发明授权
    Bipolar crossed-field device including electromagnetic coils of the same polarity 失效
    双极交叉场设备包括极性相同的电磁线圈

    公开(公告)号：US4307317A

    公开(公告)日：1981-12-22

    申请号：US85577

    申请日：1979-10-17

    申请人： Robin J. Harvey

    发明人： Robin J. Harvey

    IPC分类号： H01J17/00 ,  H01J17/14 ,  H01J1/50 ,  H01J23/10

    CPC分类号： H01J17/14 ,  H01J17/00 ,  H01J2893/0059

    摘要： Bipolar crossed-field device 10 has outer electrode 12 and inner electrode 18 which define interelectrode space 16. Magnetic field coils 46, 48 operate together to form a magnetic field in the interelectrode space 16 shaped to trap electrons for cascading ionization and plasma formation when viewed from either electrode.

    摘要翻译： 双极交叉场设备10具有限定电极间空间16的外电极12和内电极18.磁场线圈46,48一起工作，以在电极间空间16中形成磁场，该空间16形成为捕获电子以进行级联电离和等离子体形成 从任一电极。

    Spark source with regulation of spark magnitude by control of spark timing
    2.
    发明授权
    Spark source with regulation of spark magnitude by control of spark timing 失效

    公开(公告)号：US4055783A

    公开(公告)日：1977-10-25

    申请号：US662891

    申请日：1976-03-01

    申请人： John P. Walters ,  David M. Coleman

    发明人： John P. Walters ,  David M. Coleman

    IPC分类号： G01N21/67 ,  H01J17/00 ,  H03K3/55 ,  G01J3/30 ,  H05B7/20

    CPC分类号： H03K3/55 ,  G01N21/67 ,  H01J17/00 ,  H01J2893/0059

    摘要： The disclosed spark source is adapted to generate electrical sparks to produce light for spectroscopic analysis of materials placed on the spark gap electrodes or introduced into the sparks. The disclosed spark source comprises a high voltage transformer having a secondary winding for supplying alternating current at a high voltage, a storage capacitor, a charging circuit including a rectifier connected between the secondary winding and the capacitor for charging the capacitor, spark gap electrodes having a spark gap therebetween, a discharge circuit including an electronic switching device connected between the capacitor and the spark gap electrodes for discharging the capacitor across the spark gap and control means for supplying a sequence of variably spaced triggering pulses to the input means of the electronic switching device for producing a sequence of spark cycles in which the capacitor is charged to substantially the same voltage for all of the spark cycles. During the intervals between sparks, the capacitor is recharged by the transformer and the rectifier. The timing of the sparks is varied, with reference to the phase angle of the alternating current, so that the capacitor is charged to the same voltage during each of the intervals between sparks. The timing of the sparks is computed to accommodate the variation in the instantaneous voltage developed by the transformer during such intervals. By varying the timing of the sparks, it is possible to vary the voltage to which the capacitor is charged, over a wide range. The electronic switching device may comprise a thyratron in parallel with a shunting diode, to carry the oppositely polarized half-cycles of the oscillatory capacitor discharge current. An inductance element may be connected in series with the thyratron to improve the commutation between the thyratron and the shunting diode. It is also advantageous to insert an inductance element in series with the shunting diode to bring about a further improvement in such commutation.

    Laser system incorporating a field effect emitter
    3.
    发明授权
    Laser system incorporating a field effect emitter 失效
    包含场效应发射体的激光系统

    公开(公告)号：US3798570A

    公开(公告)日：1974-03-19

    申请号：US3798570D

    申请日：1973-03-29

    申请人： US ARMY

    发明人： HAGOOD J ,  CASON C ,  SHELTON J

    IPC分类号： H01J17/00 ,  H01S3/097 ,  H01S3/09

    CPC分类号： H01S3/09707 ,  H01J17/00 ,  H01J2893/006

    摘要： An improved laser system is provided which increases laser efficiency, reduces power consumption and affords simplified construction. The improved laser, which can include any one of several electric pulsed systems, is capable of operating over an extended energy and duty cycle range. In operation only the electrical energy that contributes to the lasing action is drained from the energy source, thus greatly increasing the efficiency of the overall system. A mechanically biasable field effect electron emitter functions as either an active part of the laser or as an adjustable current controlling device, for controlling the period of lasing action.

    摘要翻译： 提供了一种改进的激光系统，其提高了激光效率，降低了功耗并提供了简化的结构。 可以包括几个电脉冲系统中的任何一个的改进的激光器能够在扩展的能量和占空比范围内操作。 在操作中，只有有助于激光作用的电能才能从能量源排出，从而大大提高了整个系统的效率。 机械偏置场效应电子发射器用作激光器的有源部分或作为可调电流控制装置，用于控制激光作用的周期。