Neutron Imaging System for Material Analysis
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Solution Overview
Problem
The challenge lies in detecting and utilizing gamma ray photons generated by neutron capture reactions in materials, as these signals are often masked by background radiation, making it difficult to effectively image or analyze materials using these photons.
Innovation Solution
An imaging method and system that emit neutrons into a material, convert passed-through neutrons into gamma ray photons, and detect them in specific energy ranges (0-511 keV, 500-520 keV, 511-660 keV, and ≥650 keV) to deduce material properties, such as element identification and concentration, using a detector like cadmium telluride to enhance detection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gamma ray photons are detected directly from neutron capture reactions in materials, then imaging information about the material can be obtained, but the detection signal is difficult to detect due to background radiation and neutron induced background
Solution Approach 1:
The patent segments the detection process by dividing the energy spectrum into multiple distinct energy ranges (first, second, third, and fourth energy ranges). Each range captures gamma ray photons with specific energies produced by different nuclear reactions. By analyzing the distribution of photons across these segmented energy ranges, the system can distinguish between photons from the material of interest and those from background radiation, thereby improving signal detection precision while mitigating background interference.
2Measurement precision
If multiple energy ranges are used for gamma ray detection, then material property deduction accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent employs a universal detection approach where a single detector system is designed to simultaneously detect gamma ray photons across multiple energy ranges. The detector and associated processing system serve multiple functions: detecting photons from different nuclear reactions, distinguishing between various radiation sources, and providing comprehensive material characterization. This multi-functional design achieves high measurement precision without proportionally increasing device complexity, as the same hardware infrastructure supports all detection functions.
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 approach allows for improved material imaging and property deduction, including boron-10 concentration, enabling more accurate radiation dosage calculation for therapies and non-destructive testing, while reducing background interference.
Implementation Method 1
As neutrons interact with a material, the material may emit, amongst other radiation, gamma ray photons due to so-called neutron capture reactions
Implementation Method 2
converting at least part of the neutrons passed through the material into a second plurality of gamma ray photons
Implementation Method 3
detecting a number of gamma ray photons, N1, in a first energy range, B1, wherein the B1 is comprised in a range 0 - 511 kiloelectronvolts, keV
Implementation Method 4
the N2 corresponds to a number of annihilation events
Data Source
Figure 1
Figure 2a~2c
Figure 3
AI summary
It is an object to provide an imaging method and system. According to an embodiment, an imaging method comprises emitting neutrons into a material, wherein the material converts at least part of the emitted neutrons into a first plurality of gamma ray photons, and wherein at least part of the emitted neutrons pass through the material. Based on the neutrons passed through the material and the gamma ray photons, at least one property of the material can be deduced. An imaging method and an imaging system are provided.