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    Device for spark discharge chamber employing segmented cathode
    31.
    发明授权
    Device for spark discharge chamber employing segmented cathode 失效
    用于使用分离阴极的火花放电室的装置

    公开(公告)号：US3836780A

    公开(公告)日：1974-09-17

    申请号：US21838572

    申请日：1972-01-17

    Applicant: AGA AB

    Inventor： AMQVIST L ,  TIMMER F

    IPC: H01J47/10 ,  G01T1/18

    CPC classification number: H01J47/10

    Abstract: A spark discharge chamber for detailed study of gamma and beta radiation comprising a plane cathode, a lattice-shaped auxiliary electrode and an anode, said cathode being divided into at least two cathode sections which are electrically insulatable from one another.

    Abstract translation: 一种用于详细研究伽马和β辐射的火花放电室，包括平面阴极，格子状辅助电极和阳极，所述阴极被分成至少两个彼此电绝缘的阴极部分。

    Cosmic dust sensor
    32.
    发明授权
    Cosmic dust sensor 失效
    COSMIC DUST SENSOR

    公开(公告)号：US3626189A

    公开(公告)日：1971-12-07

    申请号：US3626189D

    申请日：1968-12-31

    Applicant: NASA

    Inventor： BERG OTTO E

    IPC: G01T1/29 ,  H01J47/10 ,  H01J49/40 ,  G01T1/18

    CPC classification number: G01T1/29 ,  H01J47/10

    Abstract: A sensor for detecting and measuring the energy, velocity and direction of travel of a cosmic dust particle, comprises an array of electrodes. Some of the electrodes are arranged in columns and spaced in close proximity to other electrodes that are disposed in rows. Together the columns and rows define a plurality of sectors through which a cosmic particle may traverse. Each electrode includes electrically biased conductor layers supported on an optically transparent matrix. Ions and electrons from an impacting cosmic dust particle compose an ionized plasma for collection on the electrically biased conductors, creating an electrical output pulse which may be amplified. A second array of electrodes in columns and grids in rows is included in spaced relationship from the first array. An impacting cosmic dust particle on the second array produces an electrical output pulse in the same manner as described. Should a particle penetrate the first array and impact upon the second spaced array, a pair of time spaced electrical outputs will result, the time spacing of the pulses being proportional to the velocity of the particle. The direction of the particle''s travel, and thereby its origin in space is determined by the alignment of respective sectors traversed by the particle. Behind the second array is placed a microphone plate which arrests further penetration of the particle. The microphone output amplitude is an indication of the momentum of a particle. At least one of the secottors in each of the arrays is bounded by an epoxy coating rendering it impervious to plasma collection. Accordingly, a pulse output originated from the impervious sector gives an indication of noise or other interference collected by the sensor. Additionally, a second microphone of small area is segregated from the first-described microphone and is provided with a separate output. Accordingly, electrical signals from the small microphone which are disproportionate with respect to the small area of the second microphone are indicative of interfering noise as well as particle impact.

    Wire spark chamber with magnetostrictive readout
    34.
    发明授权
    Wire spark chamber with magnetostrictive readout 失效
    具有磁感应读数的线束灯

    公开(公告)号：US3601612A

    公开(公告)日：1971-08-24

    申请号：US3601612D

    申请日：1969-08-22

    Applicant: ATOMIC ENERGY COMMISSION

    Inventor： PEREZ-MENDEZ VICTOR

    IPC: H01J47/10 ,  G01T5/00

    CPC classification number: H01J47/10

    Abstract: A wire spark chamber having magnetostrictive readout. One embodiment thereof is for particular use with low energy gamma rays, X-rays, or neutral particles whose presence is detected by secondary particles produced in converters placed in or around the wire planes of the chamber. Another embodiment has a very large and uniformly sensitive detecting area by means of auxiliary conducting planes which serve to charge the chamber capacity with a low impedance transmission-line characteristic. The embodiment for use with low energy gamma, X-ray or neutral particles has utilization in the field of medical diagnostics while the large chamber embodiment provides the capability of detecting multiple tracks with uniform high efficiency, thus fulfilling a long looked for need in the field of wire spark chambers.

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