Compact GEM Muon Detector for Borehole Mineral Tomography
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current muon detectors for mineral exploration are not compact or robust enough for deployment down boreholes, limiting their ability to withstand harsh environments and provide long-term, high-resolution data on subsurface mineral deposits.
Innovation Solution
The development of compact, robust muon detectors using gas electron multiplier (GEM) technology within a time projection chamber (TPC) device, equipped with readout electronics that are low power and powered by a battery, allowing for reliable operation in harsh conditions and providing high-resolution muon detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional muon detectors are used, then detection capability is provided, but the detectors are not compact or robust enough for borehole deployment
Solution Approach 1:
The detector is divided into modular components including a cathode, drift region with gas, anode with mesh, and micropattern gaseous detector sections. This segmentation allows each component to be optimized independently for both compactness and robustness, enabling borehole deployment while maintaining detection capability
Solution Approach 2:
The micropattern gaseous detector is nested within the chamber structure, with the anode mesh and gas volume contained within a compact cylindrical chamber. This nested arrangement maximizes detection functionality within minimal volume, satisfying both compactness and robustness requirements
2Measurement precision
If high-resolution detection is achieved, then measurement precision improves, but device complexity increases
Solution Approach 1:
The detector replaces complex mechanical positioning and shielding systems with a simplified electric field-based detection mechanism using gas ionization and electron multiplication. This substitution achieves high measurement precision through electrical signals while reducing overall device complexity
Solution Approach 2:
The micropattern gaseous detector utilizes controlled changes in gas pressure, composition, and electric field parameters to optimize detection resolution. By tuning these parameters rather than increasing structural complexity, high measurement precision is achieved with a relatively simple device architecture
3Duration of action of stationary object
If long-term deployment is enabled, then duration of action increases, but power consumption becomes significant
Solution Approach 1:
The detector employs periodic triggering based on muon arrival events rather than continuous operation. The readout electronics are activated only when ions reach the anode, creating a periodic action pattern that extends battery life while maintaining detection capability for long-term deployment
Solution Approach 2:
The detector utilizes the natural passage of cosmic muons as the triggering mechanism, requiring no external continuous power input for signal generation. The system serves itself by converting ambient cosmic ray interactions into detectable electrical signals, minimizing power consumption for extended deployment
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
These detectors enable long-term, high-resolution muon detection in harsh environments, facilitating the accurate mapping of subsurface mineral deposits by generating detailed three-dimensional images of mineral deposits with improved robustness and reduced power consumption.
Implementation Method 1
the gas having a composition and pressure sufficient to be ionized by the passage of atmospheric muons through the chamber to form ions in the chamber
Implementation Method 2
a micropattern gaseous detector arranged along the axis between the cathode and the anode and proximate to the anode and configured to receive the ions formed in the chamber between the anode and the cathode and generate electrons in response to each ion sufficient to generate a current in one or more of the mesh wires of the anode
Data Source
AI summary
A muon detector includes: a chamber having a maximum cross-sectional dimension of 30 cm or less; a gas sealed inside the chamber ionized by the passage of atmospheric muons to form ions in the chamber; a cathode in the chamber at a first position; an anode in the chamber displaced from the first position, the anode including a mesh of wires; a micropattern gaseous detector arranged between the cathode and the anode and proximate to the anode and configured to receive the ions formed in the chamber between the anode and the cathode and generate electrons in response to each ion sufficient to generate a current in one or more of the mesh wires of the anode; and readout electronics in electrical communication with the anode to detect signals in response to the current generated in the mesh wires.