中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

41 records (took 0.013 seconds)

    Duoplasmatron ion source with a partially ferromagnetic anode
    32.
    发明授权
    Duoplasmatron ion source with a partially ferromagnetic anode 有权

    公开(公告)号：US11289299B2

    公开(公告)日：2022-03-29

    申请号：US16972384

    申请日：2020-10-23

    Applicant: Arizona Board of Regents on behalf of Arizona State University

    Inventor： Peter Williams

    IPC: H01J27/10 ,  H01J49/12 ,  H01J9/14

    Abstract: A duoplasmatron ion source with a partially ferromagnetic anode can be used in multiple applications, including the production of negative ions for secondary ion mass spectrometers and particle accelerators. A partially ferromagnetic anode, which may be embodied in a partially ferromagnetic anode insert, includes a ferromagnetic and non-ferromagnetic portions joined together at a juncture, with an ion extraction aperture defined in the ferromagnetic portion and the juncture being laterally offset from the aperture. An asymmetric magnetic field produced by the partially ferromagnetic region facilitates extraction of charged ions from the central, most intense region of a source plasma in the duoplasmatron ion source. A ferromagnetic conical portion of the anode defines the ion extraction aperture in order to maximize the magnetic field in the vicinity of this aperture.

    Charged particle control device
    33.
    发明授权
    Charged particle control device 失效
    带电粒子控制装置

    公开(公告)号：US5030885A

    公开(公告)日：1991-07-09

    申请号：US396644

    申请日：1989-08-22

    Applicant: Andrew J. T. Holmes

    Inventor： Andrew J. T. Holmes

    IPC: G21K1/093 ,  H01J27/10

    CPC classification number: G21K1/093 ,  H01J27/10

    Abstract: A plasma source of charged particles includes a particle extraction control device consisting of an electrode having an exit hole in it and a planar solenoid arranged to produce, when energized, a magnetic field across the exit hole in the electrode, the magnitude of the magnetic field and potentials applied to extraction electrodes being variable so as to enable different charged particles to be emitted by the source.

    Abstract translation: 带电粒子的等离子体源包括由其中具有出口孔的电极和平面螺线管构成的粒子提取控制装置，平面螺线管被布置成当通电时产生穿过电极的出射孔的磁场，磁场的大小 并且施加到引出电极的电位是可变的，以便能够使不同的带电粒子被源发射。

    Apparatus and particularly duoplasmatron usable for ionizing a gas and process for using said apparatus
    34.
    发明授权
    Apparatus and particularly duoplasmatron usable for ionizing a gas and process for using said apparatus 失效
    装置，特别是可用于电离气体的二重质谱仪和使用所述装置的方法

    公开(公告)号：US4752667A

    公开(公告)日：1988-06-21

    申请号：US29886

    申请日：1987-03-25

    Applicant: Bruno Blanchard ,  Pierre Juliet

    Inventor： Bruno Blanchard ,  Pierre Juliet

    IPC: H01J27/02 ,  H01J27/10 ,  B23K9/00

    CPC classification number: H01J27/022 ,  H01J27/10

    Abstract: The invention relates to an apparatus usable for ionizing a gas comprising a cathode serving as a hot or cold cathode and to a process for using this apparatus. The apparatus includes a facing cathode and anode, the gas to be ionized successively traversing the cathode and the anode. The apparatus is characterized in that the cathode is formed by a first and second cylindrical half-electrode in face-to-face relation, the gas to be ionized passing between the half-electrode and a conductive filament connected by a first end to the first half-electrode and by a second end to the second half-electrode and located between the half-electrodes. The invention applied to all apparatuses used for ionizing a gas, such as electric arcs, unoplasmatrons and duoplasmatrons.

    Abstract translation: 本发明涉及一种可用于电离气体的装置，包括用作热阴极或冷阴极的阴极，以及使用该装置的方法。 该装置包括面向阴极和阳极，待离子化的气体依次穿过阴极和阳极。 该装置的特征在于，阴极由第一和第二圆柱形半电极以面对面的关系形成，待离子化的气体在半电极和通过第一端连接到第一端的导电丝之间通过 半电极和第二端连接到第二半电极并且位于半电极之间。 本发明应用于用于电离气体的所有装置，例如电弧，非等离子体和双质子。

    Apparatus and method for producing ions
    35.
    发明授权
    Apparatus and method for producing ions 失效
    用于生产离子的装置和方法

    公开(公告)号：US4697085A

    公开(公告)日：1987-09-29

    申请号：US823257

    申请日：1986-01-28

    Applicant: Charles W. Magee ,  Richard E. Honig

    Inventor： Charles W. Magee ,  Richard E. Honig

    IPC: H01J27/10 ,  H01J27/00

    CPC classification number: H01J27/10

    Abstract: A source of a beam of ions includes in a housing a cathode filament, an anode spaced from the cathode and housing an ion emission opening therethrough and an intermediate electrode between the cathode and anode and having an opening therethrough in alignment with the opening in the anode. An inlet opening extends through the housing into the space between the anode and the intermediate electrode to admit a flow of the gas to be ionized into the housing. An outlet opening is through the housing adjacent the cathode and a pump is connected to the outlet opening. In the operation of the ion source a flow of pure ionizing gas is provided through the housing and over the cathode. Some of the gas is ionized to generate the desired ions and the rest of the gas is drawn out of the housing to remove impurities generated at the cathode and thereby increase the lifetime of the cathode.

    Abstract translation: 离子束源包括阴极细丝，阳极与阴极间隔开并且容纳离子发射开口，阴极和阳极之间具有中间电极，并具有与阳极中的开口对准的开口 。 入口开口延伸穿过壳体进入阳极和中间电极之间的空间，以允许待离子化的气体流入壳体。 出口开口通过与阴极相邻的壳体，并且泵连接到出口开口。 在离子源的操作中，纯电离气流通过壳体和阴极提供。 一些气体被离子化以产生所需的离子，其余的气体从外壳中拉出以除去在阴极处产生的杂质，从而增加阴极的寿命。

    Ion source apparatus
    36.
    发明授权
    Ion source apparatus 失效
    离子源装置

    公开(公告)号：US4641031A

    公开(公告)日：1987-02-03

    申请号：US689943

    申请日：1985-01-09

    Applicant: Yasuyuki Ito ,  Toru Sugawara

    Inventor： Yasuyuki Ito ,  Toru Sugawara

    IPC: H01J27/10 ,  H01J27/14 ,  H01J27/00

    CPC classification number: H01J27/14

    Abstract: An ion source apparatus comprising a bulk type thermionic cathode, which, when heated, emits thermoelectrons; an anode for causing a gas discharge in cooperation with the cathode thereby producing plasma; a grid electrode for extracting ions out of the plasma; a magnetic member for confining the plasma within a prescribed region; and a ferromagnetic body which surrounds the thermionic cathode. The ferromagnetic body removes the lines of magnetic force produced by magnets from the neighborhood of the surface of the thermionic cathode. As a result, thermoelectrons are freely emitted from the thermionic cathode, thereby ensuring a stable gas discharge.

    Abstract translation: 一种离子源装置，其包括本体型热离子阴极，其在被加热时发射热电子; 用于与阴极协作进行气体放电的阳极，从而产生等离子体; 用于从等离子体中提取离子的栅电极; 用于将等离子体限制在规定区域内的磁性构件; 以及围绕热离子阴极的铁磁体。 铁磁体从热离子阴极的表面附近去除由磁体产生的磁力线。 结果，热电子从热离子阴极自由发射，从而确保气体放电稳定。

    Cathode for duoplasmatron-type ion source
    38.
    发明授权
    Cathode for duoplasmatron-type ion source 失效
    用于杜拉斯马龙型离子源的阴极

    公开(公告)号：US3602763A

    公开(公告)日：1971-08-31

    申请号：US3602763D

    申请日：1969-10-28

    Applicant: ATOMIC ENERGY COMMISSION

    Inventor： HALL ROBERT R

    IPC: H01J27/10 ,  H01J1/52

    CPC classification number: H01J27/10

    Abstract: A central spike cathode is added to and is axially positioned through the conventional spiral filament-type cathode of a duoplasmatron-type ion source such that the current output and cathode lifetime thereof are substantially increased. The added spike cathode is so positioned that it is the closest item to the intermediate electrode of the ion source. Further increase in operating performance can be obtained when a cylindrical shield is utilized to surround the cathode assembly. The spiral filament may be turned off after initiating the arc of the ion source.

Patent Agency Ranking