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1.发明授权Device for making visible and/or registering {65 -quanta densities or two-dimensional {62 -particle density distributions 失效制造可见和/或注册的设备（65-瓦顿密度或二维密度分布（62-密度密度分布）
公开(公告)号：US3622787A
公开(公告)日：1971-11-23
申请号：US3622787D
申请日：1969-06-02
Applicant: AGA AB
Inventor： TIMMER FLORIS , ALPHEN A D
CPC classification number: H01J47/10 , A61B6/4258
Abstract: A device for making visible and/or registering the flux density of gamma-quanta or the two-dimensional density distribution of beta-particles includes a gas and vapor-filled spark discharge chamber with a flat cathode, a flat, grid-form anode and a gridform auxiliary electrode arranged therein. The cathode is positioned parallel to and spaced from the anode and the auxiliary electrode is located therebetween. A high-voltage source is connected to the electrodes and an integrating recorder registers the pattern of the spark discharges between the auxiliary electrode and the anode such as caused by entering radiation. The auxiliary electrode is galvanically connected to the cathode and is spaced therefrom a distance such that the electron cloud which triggers the spark discharge is not attenuated by electron attachment in the space between cathode and auxiliary electrode.
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