公开(公告)号：US20040056206A1

公开(公告)日：2004-03-25

申请号：US10254465

申请日：2002-09-25

Applicant: CONSTELLATION TECHNOLOGY CORPORATION

Inventor： Alexander I. Bolozdynya ,  Aleksey E. Bolotnikov ,  Stephen M. Schindler

IPC: G01T001/18

CPC classification number: G01T1/185 ,  G01T1/1642 ,  H01J47/005

Abstract: An ionization chamber is provided for the detection of nuclear radiation. The chamber is a vessel which acts as a cathode wherein at least one anode is disposed within the chamber and off-set from a center axis of the chamber. The chamber can be made from variety of shapes but is cylindrical in the preferred embodiment. The device contains two anodes in the preferred embodiment which are both off-set from the center axis. One anode collects the free floating electrons which are produced in response to particle ionization and therefore has a collected charge applied thereto. The second anode has the charge induced by immobile ions. The induced charge is subtracted from the collected charge thereby providing an improved resolution for the ionization chamber which translates into a more accurate result. In the preferred embodiment, a pressurized noble gas, such as xenon, is used. In some special geometries of the chamber, one of the anodes becomes part of the cathode and the charge induced by immobile ions becomes negligibly low. Thus the subtraction of the induced charge is not required.

Abstract translation: 提供电离室用于检测核辐射。 该室是用作阴极的容器，其中至少一个阳极设置在室内并且从室的中心轴线偏离。 腔室可以由各种形状制成，但在优选实施例中为圆柱形。 该装置在优选实施例中包含两个从中心轴偏离的阳极。 一个阳极收集响应于颗粒电离而产生的自由浮动电子，因此施加了收集的电荷。 第二阳极具有由固定离子引起的电荷。 从收集的电荷中减去感应电荷，从而为电离室提供改进的分辨率，从而转化为更准确的结果。 在优选实施例中，使用诸如氙的加压惰性气体。 在室的一些特殊几何形状中，一个阳极成为阴极的一部分，并且由固定离子引起的电荷变得可忽略不计。 因此，不需要减去感应电荷。