He-3 Neutron Detection Layout for In-Situ Regolith Mapping
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Solution Overview
Problem
Current methods for identifying helium-3 (He-3) concentrations in mining sites are inefficient, requiring extensive excavation and processing, and lack accurate pre-mining assessments to optimize resource allocation and minimize costs.
Innovation Solution
The development of a nanosecond neutron analysis and associated particle imaging device (NNA/API) with a gamma ray detector system, which is designed to detect He-3 and other target materials on the surface of extra-terrestrial bodies like the Moon, without the need for a vacuum chamber, allowing for efficient mapping of He-3 concentrations in low-pressure environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional excavation and processing methods are used to identify He-3 concentrations, then comprehensive sampling can be achieved, but extensive time and resources are consumed
Solution Approach 1:
The patent replaces mechanical excavation and laboratory processing with a neutron-based detection system. The NNA/API device uses neutron emission and gamma-ray detection to identify He-3 concentrations in situ, eliminating the need for physical excavation and transport of samples to laboratories.
Solution Approach 2:
The detection system performs preliminary identification of He-3 concentrations before any mining operations begin. By mapping He-3 distribution in advance using neutron detection, the system enables planners to identify high-concentration zones and design targeted extraction strategies, avoiding unnecessary excavation in low-concentration areas.
2Measurement precision
If traditional mining exploration methods are employed, then thorough assessment can be conducted, but high costs and resource consumption occur
Solution Approach 1:
The system replaces energy-intensive mechanical excavation and processing operations with a non-invasive neutron detection method. The NNA/API device uses nuclear reactions and radiation detection to assess He-3 concentrations without physically disturbing the regolith, dramatically reducing energy consumption.
Solution Approach 2:
The detection system creates a detailed map or model of He-3 concentration distribution across the lunar surface without physical extraction. This informational copy of the subsurface composition allows for virtual exploration and planning, eliminating the need for physical sampling and analysis of numerous samples.
3Measurement precision
If extensive excavation is performed to assess He-3 concentration, then accurate data can be obtained, but significant disruption to the mining location occurs
Solution Approach 1:
The patent substitutes mechanical excavation with a non-contact or minimal-contact neutron detection system. The NNA/API device can operate from the surface or near-surface environment, using neutron beams to probe subsurface He-3 concentrations without removing large volumes of regolith or disrupting the lunar landscape.
Solution Approach 2:
The detection system utilizes the natural properties of He-3 to absorb thermal neutrons, allowing the target material itself to reveal its presence and concentration. He-3 atoms naturally interact with the emitted neutrons, providing self-identification of high-concentration zones without requiring physical extraction or laboratory analysis.
4Measurement precision
If conventional detection methods are used, then comprehensive analysis can be performed, but the system complexity and cost increase
Solution Approach 1:
The NNA/API device is designed as a multi-functional system that can detect not only He-3 concentrations but also map the distribution of other elements and minerals in the lunar regolith. The same neutron source and gamma-ray detection apparatus used for He-3 identification can characterize the broader geological composition, reducing the need for separate specialized instruments.
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
This solution enables precise and efficient identification of He-3 concentrations, reducing the need for extensive mining operations and optimizing resource allocation, thereby enhancing the economic viability and efficiency of mining projects.
Implementation Method 1
a neutron emitter configured to emit neutrons that interact with target materials
Implementation Method 2
gamma ray detector configured to detect gamma rays emitted from the regolith
Data Source
AI summary
Disclosed is a He-3 detector arrangement that generally comprises a neutron shield interposed between a thermal neutron source and thermal neutron detectors all resting on a metal platform. In operation, thermal neutrons from the thermal neutron source are emitted when the He-3 detector arrangement is on or near the ground. Some of the thermal neutrons from the neutron source backscatter from the regolith to the neutron detector where a baseline count level is registered. When He-3 is present in the regolith, some of the thermal neutrons are absorbed by the He-3, which reduces the detected count rate. When integrated with a rover, the He-3 detector is moved from place to place with the count rates at each location compared. In this manner, higher and lower levels of He-3 in the regolith can be mapped indicating target regions for mining the He-3.