Thermal Neutron Detector Housing That Isolates Pressure Flexing
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Solution Overview
Problem
Existing thermal neutron detectors are susceptible to deflections and deformations due to ambient pressure changes, temperature variations, and mechanical shock, which affect the electric field and gas gain, leading to reduced detection efficiency and false alarms.
Innovation Solution
A narrow thermal neutron detector design with a main housing body and separate cathode plates, where the active sheet layer is under tension and the housing is designed to flex independently of the cathode plates, reducing deflections and maintaining detection efficiency across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the housing is made rigid to maintain structural stability, then structural strength is improved, but the housing cannot flex independently from the cathode plates, causing deflections and deformations under ambient pressure changes and mechanical shock
Solution Approach 1:
The housing is segmented into multiple independent components: the main housing body, separate cathode plates, and flexible sidewalls. This segmentation allows each component to respond independently to external forces, enabling the housing to flex without causing deflections in the cathode plates or active sheet layer, thus maintaining detection efficiency while withstanding mechanical shock and pressure changes
Solution Approach 2:
The sidewalls of the housing are designed to be flexible rather than rigid, allowing them to deform under ambient pressure changes and mechanical shock. This flexibility is achieved through appropriate material selection and structural design that permits controlled deformation while maintaining the integrity of the housing and isolating the cathode plates from external forces
2Reliability
If the active sheet layer is made thick to improve neutron detection efficiency, then detection efficiency is improved, but the device weight and material cost increase
Solution Approach 1:
The invention optimizes the thickness parameter of the active sheet layer to achieve the minimum required thickness for adequate neutron detection efficiency. By carefully selecting and controlling the thickness parameter, the design achieves sufficient detection performance while minimizing the weight and material cost associated with thicker active layers
3Adaptability or versatility
If the housing is designed to be flexible to accommodate pressure changes, then adaptability to environmental conditions is improved, but structural strength and manufacturing precision may be compromised
Solution Approach 1:
The housing is divided into separate components with distinct functions: the main housing body provides structural support, the sidewalls provide flexible adaptation to pressure changes, and the cathode plates maintain precise positioning. This segmentation allows the flexible sidewalls to accommodate pressure changes without compromising the precision of the cathode plate positioning or the overall structural integrity
Solution Approach 2:
The flexible sidewalls act as intermediaries between the external environment and the internal components. They absorb and accommodate pressure changes and mechanical shocks, protecting the precision components (cathode plates and active sheet layer) from external forces while maintaining the structural framework of the housing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design significantly reduces erroneous signals from mechanical shock and pressure changes, maintaining high detection efficiency and flexibility in manufacturing, while allowing for the use of lower-cost materials and reduced weight.
Implementation Method 1
an ionization detector module... supporting an active sheet layer... an electrical detection current is generated on the electrode arrangement responsive to incident thermal neutrons
Data Source
AI summary
A narrow thermal neutron detector includes a slidably receivable ionization thermal neutron detector module within an overall housing body. An active sheet layer of the ionization thermal neutron detector module can be tensioned across its width. The ionization thermal neutron detector module can include module upper major surface extents and module lower surface extents such that, when installed within the housing body, the module upper major surface extents are in a first spaced apart confronting relationship with housing upper major surface extents to define a first clearance and module lower major surface extents are in a second spaced apart confronting relationship with housing lower major surface extents to define a second clearance to accommodate housing flexing due to ambient pressure change. The housing body can be formed with a single opening for receiving the ionization thermal neutron detection module or with opposing first and second opposing end openings.