GEM-based fission chamber

Abstract

The invention discloses a GEM-based fission chamber, comprising a GEM detector, wherein the GEM detector is provided with a metal shell, a drift electrode, a GEM film and a collecting electrode; the drift electrode, the GEM film and the collecting electrode are arranged in the metal shell; the GEM film is arranged between the drift electrode and the collecting electrode; the drift electrode, a GEMfilm upper surface layer electrode and a GEM film lower surface layer electrode are externally applied with negative voltages which are gradually reduced in absolute values; the collecting electrodeis grounded and is electrically connected with a pulse signal acquisition circuit; a drift region is formed between the GEM film and the drift electrode, and a collection region is formed between theGEM film and the collection electrode; a gas chamber is defined by the metal shell, the drift electrode and the collecting electrode, and flowing ionized gas is arranged in the gas chamber; a plurality of aluminum plates are arranged in the drift region; each aluminum plate is vertical to the drift electrode, and one side of each aluminum plate is fixedly connected with the drift electrode; and uranium-235 layers are arranged on the two side faces of each aluminum plate. The fission chamber of the invention has the advantages of high detection efficiency, high sensitivity and high counting rate range, and is expected to meet the wide-range monitoring requirement of the neutron flux density of the reactor in a single pulse mode.

Description

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AI Technical Summary

Benefits of technology

This patented technology uses an improved method for detecting radiation from reactors by measuring gamma rays emitted during nuclear explosion events or other processes that produce radioactive materials such as UO2 (uranic acid). By placing these particles near certain areas within the fuel rods inside the core of a boiling water reactor, it becomes possible to monitor how well this material was produced without stopping its use altogether.

Problems solved by technology

This patented describes different ways for measuring nuclear reactivity during normal operations by combining multiple detectors with relays or other devices that measure specific properties like energy levels at certain points within an atomic nucleus. These techniques have several benefits over traditional systems including being more efficient than current technologies due to their ability to distinguish between various types of radiation without requiring many expensive equipment.

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