Method for charge neutralization of surface in space with space-charge
neutral plasma
    1.
    发明授权
    Method for charge neutralization of surface in space with space-charge neutral plasma 失效
    用空电荷中性等离子体对空间表面进行电荷中和的方法

    公开(公告)号:US5696429A

    公开(公告)日:1997-12-09

    申请号:US383340

    申请日:1995-02-03

    摘要: Contaminants are cleaned from the surface of a body in space by generating a substantially space-charge neutral reactive plasma, directing the plasma onto the contaminated surface at an energy below the surface sputtering energy (typically 20 eV), and reacting the plasma with the contaminants to remove them. A helicon wave plasma source is made light weight and compact enough for spacecraft use, with a plasma energy low enough to avoid damaging optical surfaces, by using permanent magnets to establish a static axial magnetic field, and a simple but novel rf antenna design. The antenna consists of a pair of spaced conductive rings which extend around the plasma tube, with conductive base and rf feed bars extending between the rings on diametrically opposite sides. The feed bar is interrupted to provide an rf input on opposite sides of the interruption. The antenna is preferably formed as an integral metal unit, with its rings rigidly supported by and integral with opposite ends of the base bar. The plasma source is also useful in neutralizing localized charges on the spacecraft.

    摘要翻译: 通过产生基本上空间电荷的中性反应等离子体,将空气中的污染物从空间的表面清洁,将等离子体以低于表面溅射能量(通常为20eV)的能量引导到污染表面上,并使等离子体与污染物 去除它们。 螺旋波等离子体源的重量轻且足够紧凑,用于航天器的使用,等离子体能量足够低以避免损坏的光学表面,通过使用永磁体建立静态轴向磁场,以及简单而新颖的射频天线设计。 天线由一对间隔开的导电环组成,其间围绕等离子体管延伸,导电基底和射频馈送棒在直径相对的两侧的环之间延伸。 进给杆被中断以在中断的相对侧提供rf输入。 天线优选地形成为一体的金属单元,其环由基条的相对端刚性地支撑并与其一体形成一体。 等离子体源还可用于中和航天器上的局部电荷。

    Method for cleaning contaminants from a body in space using a space
charge neutral plasma
    2.
    发明授权
    Method for cleaning contaminants from a body in space using a space charge neutral plasma 失效
    使用空间电荷中性等离子体从空间中的身体清除污染物的方法

    公开(公告)号:US5628831A

    公开(公告)日:1997-05-13

    申请号:US383290

    申请日:1995-02-03

    摘要: Contaminants are cleaned from the surface of a body in space by generating a substantially space-charge neutral reactive plasma, directing the plasma onto the contaminated surface at an energy below the surface sputtering energy (typically 20 eV), and reacting the plasma with the contaminants to remove them. A helicon wave plasma source is made light weight and compact enough for spacecraft use, with a plasma energy low enough to avoid damaging optical surfaces, by using permanent magnets to establish a static axial magnetic field, and a simple but novel rf antenna design. The antenna consists of a pair of spaced conductive rings which extend around the plasma tube, with conductive base and rf feed bars extending between the rings on diametrically opposite sides. The feed bar is interrupted to provide an rf input on opposite sides of the interruption. The antenna is preferably formed as an integral metal unit, with its rings rigidly supported by and integral with opposite ends of the base bar. The plasma source is also useful in neutralizing localized charges on the spacecraft.

    摘要翻译: 通过产生基本上空间电荷的中性反应等离子体,将空气中的污染物从空间的表面清洁,将等离子体以低于表面溅射能量(通常为20eV)的能量引导到污染的表面上,并使等离子体与污染物 去除它们。 螺旋波等离子体源的重量轻且足够紧凑,用于航天器的使用,等离子体能量足够低以避免损坏的光学表面,通过使用永磁体建立静态轴向磁场,以及简单而新颖的射频天线设计。 天线由一对间隔开的导电环组成,其间围绕等离子体管延伸,导电基底和射频馈送棒在直径相对的两侧的环之间延伸。 进给杆被中断以在中断的相对侧提供rf输入。 天线优选地形成为一体的金属单元,其环由基条的相对端刚性地支撑并与其一体形成一体。 等离子体源还可用于中和航天器上的局部电荷。

    RF plasma source and method for plasma cleaning of surface in space
    3.
    发明授权
    RF plasma source and method for plasma cleaning of surface in space 失效
    射频等离子体源和空间表面等离子体清洗方法

    公开(公告)号:US5514936A

    公开(公告)日:1996-05-07

    申请号:US383350

    申请日:1995-02-03

    摘要: Contaminants are cleaned from the surface of a body in space by generating a substantially space-charge neutral reactive plasma, directing the plasma onto the contaminated surface at an energy below the surface sputtering energy (typically 20 eV), and reacting the plasma with the contaminants to remove them. A helicon wave plasma source is made light weight and compact enough for spacecraft use, with a plasma energy low enough to avoid damaging optical surfaces, by using permanent magnets to establish a static axial magnetic field, and a simple but novel rf antenna design. The antenna consists of a pair of spaced conductive rings which extend around the plasma tube, with conductive base and rf feed bars extending between the rings on diametrically opposite sides. The feed bar is interrupted to provide an rf input on opposite sides of the interruption. The antenna is preferably formed as an integral metal unit, with its rings rigidly supported by and integral with opposite ends of the base bar. The plasma source is also useful in neutralizing localized charges on the spacecraft.

    摘要翻译: 通过产生基本上空间电荷的中性反应等离子体,将空气中的污染物从空间的表面清洁,将等离子体以低于表面溅射能量(通常为20eV)的能量引导到污染表面上,并使等离子体与污染物 去除它们。 螺旋波等离子体源的重量轻且足够紧凑,用于航天器的使用,等离子体能量足够低以避免损坏的光学表面,通过使用永磁体建立静态轴向磁场,以及简单而新颖的射频天线设计。 天线由一对间隔开的导电环组成,其间围绕等离子体管延伸,导电基底和射频馈送棒在直径相对的两侧的环之间延伸。 进给杆被中断以在中断的相对侧提供rf输入。 天线优选地形成为一体的金属单元,其环由基条的相对端刚性地支撑并与其一体形成一体。 等离子体源还可用于中和航天器上的局部电荷。

    RF plasma source and antenna therefor
    4.
    发明授权
    RF plasma source and antenna therefor 失效
    射频等离子体源和天线

    公开(公告)号:US5418431A

    公开(公告)日:1995-05-23

    申请号:US113144

    申请日:1993-08-27

    摘要: Contaminants are cleaned from the surface of a body in space by generating a substantially space-charge neutral reactive plasma, directing the plasma onto the contaminated surface at an energy below the surface sputtering energy (typically 20 eV), and reacting the plasma with the contaminants to remove them. A helicon wave plasma source is made light weight and compact enough for spacecraft use, with a plasma energy low enough to avoid damaging optical surfaces, by using permanent magnets to establish a static axial magnetic field, and a simple but novel rf antenna design. The antenna consists of a pair of spaced conductive rings which extend around the plasma tube, with conductive base and rf feed bars extending between the rings on diametrically opposite sides. The feed bar is interrupted to provide an rf input on opposite sides of the interruption. The antenna is preferably formed as an integral metal unit, with its rings rigidly supported by and integral with opposite ends of the base bar. The plasma source is also useful in neutralizing localized charges on the spacecraft.

    摘要翻译: 通过产生基本上空间电荷的中性反应等离子体,将空气中的污染物从空间的表面清洁,将等离子体以低于表面溅射能量(通常为20eV)的能量引导到污染表面上,并使等离子体与污染物 去除它们。 螺旋波等离子体源的重量轻且足够紧凑,用于航天器的使用,等离子体能量足够低以避免损坏的光学表面,通过使用永磁体建立静态轴向磁场,以及简单而新颖的射频天线设计。 天线由一对间隔开的导电环组成,其间围绕等离子体管延伸,导电基底和射频馈送棒在直径相对的两侧的环之间延伸。 进给杆被中断以在中断的相对侧提供rf输入。 天线优选地形成为一体的金属单元,其环由基条的相对端刚性地支撑并与其一体形成一体。 等离子体源还可用于中和航天器上的局部电荷。

    High quality-factor resonator
    6.
    发明授权
    High quality-factor resonator 有权
    高质量因子谐振器

    公开(公告)号:US08922301B1

    公开(公告)日:2014-12-30

    申请号:US13283138

    申请日:2011-10-27

    IPC分类号: H03H7/01

    摘要: A high-Q factor resonator comprises a solenoid having an embedded capacitor assembled in a machineable high-frequency dielectric printed circuit board (“PCB”), or other substrate. The solenoid comprises a plurality of surface conductors positioned on upper and lower surfaces of the PCB. The solenoid further comprises a plurality of conductive vias extending through the PCB between the surface conductors, and at least two aligned vias are separated by a capacitive gap. The device can therefore be described as a coupled circuit having a 1.5 or more turn inductor with an embedded capacitor along the length of the conductive path. Accordingly, a resonator having a high-Q factor is provided which is relatively inexpensive and easy to fabricate.

    摘要翻译: 高Q因子谐振器包括具有组装在可加工的高频电介质印刷电路板(“PCB”)或其它基板中的嵌入式电容器的螺线管。 螺线管包括位于PCB的上表面和下表面上的多个表面导体。 螺线管还包括在表面导体之间延伸穿过PCB的多个导电通孔,并且至少两个对准的通孔被电容间隙分开。 因此,该装置可以被描述为具有沿着导电路径的长度的具有嵌入式电容器的1.5或更多转向电感器的耦合电路。 因此,提供了具有高Q因子的谐振器,其相对便宜并且易于制造。

    Ion thruster with long-lifetime ion-optics system
    9.
    发明授权
    Ion thruster with long-lifetime ion-optics system 失效
    离子推进器具有长寿命离子光学系统

    公开(公告)号:US5924277A

    公开(公告)日:1999-07-20

    申请号:US767920

    申请日:1996-12-17

    IPC分类号: B64G1/24 F03H1/00 H05H1/00

    CPC分类号: F03H1/0043

    摘要: Ion erosion of grids is reduced in an ion thruster with a multiple-grid ion-optics system. The thruster has an array of aperture sets in which aperture areas change in a perimeter region of the array. In one ion-optics system embodiment, a screen aperture area is reduced and a decelerator aperture area is increased in aperture sets that are proximate to the perimeter of the array. Prototype tests of this embodiment have illustrated significant reduction of ion erosion.

    摘要翻译: 使用多栅离子光学系统的离子推进器减小了栅格的离子侵蚀。 推进器具有一组孔径组,其中孔径区域在阵列的周边区域中变化。 在一个离子光学系统实施例中,屏幕孔径面积减小,并且靠近阵列周边的孔径组中的减速器孔径面积增加。 该实施例的原型测试表明离子侵蚀显着减少。