Magnetic Electron Beam Dosimetry for Real-Time Dose Feedback
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Solution Overview
Problem
Current radiation dosimetry systems lack real-time measurement capabilities, relying on post-exposure analysis methods like alanine pellet dosimeters, which are not suitable for immediate dosage feedback in radiation-emitting systems.
Innovation Solution
The implementation of magnetic sensors proximate to an electron beam horn in electron beam processing devices, which detect electrons using a balun-type detector with a coil and sensor pad, measuring electron movement to calculate radiation dosage in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If alanine pellet dosimeters are used to measure radiation exposure, then dosage measurement is achieved, but real-time feedback capability is lost
Solution Approach 1:
The patent replaces the mechanical/chemical alanine pellet dosimeter system with an electromagnetic detection system using magnetic sensors to detect electron beams directly. This substitution enables real-time measurement by detecting the magnetic field generated by moving electrons, eliminating the need for post-exposure analysis of alanine pellets while maintaining accurate dosage measurement capability.
Solution Approach 2:
The patent introduces magnetic sensors as an intermediary device that detects the electron beam indirectly through its magnetic field rather than direct interaction with the radiation. This intermediary approach allows for real-time detection without requiring the electron beam to physically interact with a dosimeter material, enabling immediate feedback while preserving measurement accuracy.
2Measurement precision
If post-exposure analysis methods are used, then accurate dosage measurement is achieved, but operational efficiency is reduced
Solution Approach 1:
The patent implements continuous real-time monitoring of electron beam dosage during the irradiation process using magnetic sensors. This continuous measurement capability eliminates the interruption caused by post-exposure analysis, allowing the irradiation system to operate continuously and efficiently while maintaining accurate dosage records for quality control and process optimization.
3Loss of time
If real-time electron beam detection is implemented, then immediate dosage feedback is achieved, but system complexity increases
Solution Approach 1:
The patent extracts only the essential detection function from complex dosimetry systems by using simple magnetic sensors that detect the magnetic field of electron beams. This extraction approach avoids the complexity of analyzing the full electron beam interaction while capturing sufficient information for real-time dosage measurement, thereby reducing overall system complexity while maintaining real-time capability.
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
Enables real-time monitoring and accurate measurement of radiation dosage, improving operational efficiency and ensuring precise sterilization processes in applications like food and medical product sterilization.
Implementation Method 1
one or more magnetic sensors are positioned proximate to an electron beam horn of an electron beam ('e-beam') processing device emitting a plurality of electrons. The magnetic sensor detects an electron moving in a proximity to the sensor.
Implementation Method 2
As an electron travels at a speed and direction, the electron will create a magnetic field. As the electron passes by the electron sensor, the magnetic field of the electron disturbs the magnetic field of the current carrying coil of the electron sensor.
Data Source
AI summary
An apparatus, system, and method for real-time dosimetry. An electron beam irradiation system includes one or more detectors. The detectors have coils that, when an electron travels by a sensor pad in the detector, the electron induces a current into the coils. The current is detected and the electron is counted. The number of electrons counted at the one or more detectors is compared to the number of electrons leaving an electron gun, giving a dosage of the workpiece being irradiated.