知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

34 条记录 (耗时 0.02 秒)

    Quasi-optical gyrotron having an electron gun with alternating high and low density electron emitting segments
    5.
    发明授权
    Quasi-optical gyrotron having an electron gun with alternating high and low density electron emitting segments 失效
    具有高密度和低密度电子发射部分的电子枪的准光电陀螺

    公开(公告)号：US5134343A

    公开(公告)日：1992-07-28

    申请号：US570794

    申请日：1990-08-22

    申请人： Hans-Gunter Mathews

    发明人： Hans-Gunter Mathews

    IPC分类号： H01J23/04 ,  H01J23/075 ,  H01J25/00 ,  H01J25/02

    CPC分类号： H01J23/04 ,  H01J23/075 ,  H01J25/025

    摘要： For the purpose of generating an electron beam (5), a quasi-optical gyrotron comprises an electron-beam gun (1) with an annular cathode (2). The electron beam (5) passes along an electron beam axis (6) and in so doing is compressed by a static magnetic field and forced into gyration, so that it excites in a quasi-optical resonator a standing alternating electromagnetic field of specific wavelength. The resonator exhibits two mirrors (9a, 9b) arranged opposite to one another on a resonator axis (8) aligned perpendicular to the electron beam axis (6). In order to increase the efficiency of the gyrotron, the annular cathode (2) alternately exhibits segments of high and low emitting power such that the electron beam (5) has an azimuthally varying current density, values of low current density in the resonator coinciding spatially with nodal surfaces of the standing alternating electromagnetic field.

    摘要翻译： 为了产生电子束（5），准光学陀螺仪包括具有环形阴极（2）的电子束枪（1）。 电子束（5）沿着电子束轴（6）通过，并且这样做被静态磁场压缩并被迫回转，从而在准光谐振器中激发具有特定波长的站立交变电磁场。 谐振器具有在垂直于电子束轴线（6）对准的谐振器轴线（8）上彼此相对布置的两个反射镜（9a，9b）。 为了提高陀螺仪的效率，环形阴极（2）交替地呈现高发射功率和低发射功率的片段，使得电子束（5）具有方位角变化的电流密度，谐振器中的低电流密度值在空间上重合 具有站立的交变电磁场的节点表面。

    Field-emission cold-cathode electron gun having emitter tips between the top surface of gate electrode and focusing electrode
    10.
    发明授权
    Field-emission cold-cathode electron gun having emitter tips between the top surface of gate electrode and focusing electrode 失效
    场致发射冷阴极电子枪，在栅电极的顶表面和聚焦电极之间具有发射极尖端

    公开(公告)号：US5986388A

    公开(公告)日：1999-11-16

    申请号：US920508

    申请日：1997-08-29

    申请人： Hideo Makishima

    发明人： Hideo Makishima

    IPC分类号： H01J23/04 ,  H01J1/304 ,  H01J3/02 ,  H01J3/08 ,  H01J3/18 ,  H01J23/06 ,  H01J23/075 ,  H01J29/04 ,  H01J1/02

    CPC分类号： H01J23/075 ,  H01J3/022 ,  H01J2225/34

    摘要： A field-emission cathode comprises a substrate having a conductive surface, a gate electrode and a focusing electrode overlying the substrate with insulation layers interposed therebetween, a plurality of cavities formed by penetrating the gate electrode, focusing electrode and insulation layers, and an emitter formed in each of the cavities on the substrate for emission of an electron beam. The emitter has tip located at a level between the gate electrode and the focusing electrode, which receive therebetween a signal for modulating the electron beam at a high frequency.

    摘要翻译： 场发射阴极包括具有导电表面的衬底，栅电极和聚焦电极，覆盖衬底上的绝缘层，穿过栅电极，聚焦电极和绝缘层形成的多个空腔和形成的发射极 在用于发射电子束的基板上的每个空腔中。 发射极具有位于栅电极和聚焦电极之间的电平上的尖端，其间接收高频调制电子束的信号。