Abstract:
A location- or positionally-sensitive proportional counter tube of high resolution having a trough-shaped cathode in a counting chamber. A resiliently elastic wire forming the anode extends longitudinally through the counting chamber. Suitable fastening arrangements engage the ends of the wire so as to mount the wire equidistantly from the side walls of the cathode trough and in electrical communication with the input resistor of a preamplifier. The counting chamber is an openable high-pressure chamber with inlet and outlet apertures for a pressurized counter tube gas.
Abstract:
A detector for ionizing radiation comprising a generally cylindrical enclosure which contains an ionizable gas, a central wire which with a peripheral wall constitute the electrodes of the device, and a window to permit entry of ionizing radiation. With appropriate potentials applied to the central wire and peripheral wall, ionizing radiation produces electrons which are attracted to the central wire and positive ions which are attracted to the peripheral wall in proportion to the intensity of the radiation. One or more auxiliary electrodes are provided which extend parallel to and between the central electrode and the peripheral wall. An appropriate potential is applied to this auxiliary electrode to neutralize the positive ions.
Abstract:
A proportional chamber having a plurality of output conductors carrying signals indicative of the location of an event detected within the chamber and using delay lines capacitatively coupled to said conductors for receiving signals through an intermediate portion of the side wall winding of the delay line. Delay times are measured to give a readout of the position and existence of the event.
Abstract:
Method and apparatus for detecting, distinguishing and indicating low-level activity of radioactive gases, such as tritium and/or krypton-85, in a selected gas, even in the presence of electronegative gases. The apparatus consists of a detection chamber of a type which is energy selective through inclusion of plural ionization collector circuits providing two separate detector outputs. The two detector outputs are applied then to parallel signal processing channels which serve to separate detected energy through pulse amplitude discrimination and/or coincidence selection to determine absolute quantities of radioactive events for selected contaminants in the gas sample.
Abstract:
The apparatus comprises a proportional counter with a long tubular nose-piece having an end window. The anode is a short wire parallel to the window and mounted on a support so that the support together with the anode is easily removable and replaceable. The support may be axially movable within the long tubular nose-piece, whereby sensitive tuning to specific characteristic X-rays is possible.
Abstract:
An X- and gamma -radiation detector including a plurality of detecting cells. Each cell comprises an anode and two halfcathodes, the half-cathodes consisting of flat plates. The respective half-cathodes are arranged as othogonal elements so that by applying matrix technique the output of a particular cell can be selected to localize the radiation detected.
Abstract:
A radiation detector for high resolution measurement of energy spectra in flowing gas samples has a first electrode, a parallel second electrode of opposite polarity, and a detection chamber between the two electrodes. An integral pulse or stream of sample gas is passed in laminar flow through the detection chamber. A nonradioactive gas flows around the stream of sample gas to prevent contact and contamination of either electrode with radioactive material, as well as to absorb the radiation from the sample gas for detection.