Battery-Powered Ionization Chamber for Low-Intensity Alpha Sensing
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Solution Overview
Problem
Existing alpha particle detectors are typically stationary and require an external power supply, limiting their application to remote or hard-to-reach locations.
Innovation Solution
A battery-powered pulse ionization chamber alpha particle sensor with a voltage converter and processor-controlled energy management system, allowing for efficient detection of low-intensity alpha particles using minimal energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional alpha particle detectors are used, then detection capability is maintained, but portability and autonomy are limited due to external power supply requirements
Solution Approach 1:
The patent combines the power supply (battery), voltage conversion, and detection functions into a single integrated portable device. The battery-powered ionization chamber merges previously separate components (external power supply, detector, and processing unit) into one autonomous system, enabling portability while maintaining detection capability.
Solution Approach 2:
The device achieves autonomy through self-contained power management. The battery-powered system with integrated voltage converter and processor enables the detector to operate independently without external power infrastructure, making it suitable for remote or hard-to-reach locations.
2Reliability
If continuous power supply is provided to the ionization chamber, then detection function is maintained, but energy consumption increases
Solution Approach 1:
The processor controllably periodically connects the battery to the voltage converter and ionization chamber using switch S. This periodic activation maintains detection capability while significantly reducing average power consumption compared to continuous operation, extending battery life for portable use.
Solution Approach 2:
The system dynamically adjusts operational parameters by controlling the duty cycle of the voltage converter and ionization chamber activation. The processor monitors and adjusts power delivery timing and duration, optimizing the balance between detection reliability and energy conservation.
3Measurement precision
If voltage is continuously maintained in the ionization chamber, then detection sensitivity is preserved, but energy waste occurs
Solution Approach 1:
The voltage converter and ionization chamber are activated periodically rather than continuously. The processor controls switch S to apply voltage only when detection is needed, maintaining measurement precision during active periods while eliminating energy waste during idle periods.
Solution Approach 2:
The processor monitors detection needs and adjusts power delivery accordingly. By implementing feedback control, the system activates the ionization chamber only when alpha particle detection is required, optimizing the balance between maintaining detection sensitivity and minimizing energy consumption.
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 portable and autonomous detection of low-intensity alpha particles, reducing energy waste and extending battery life for remote monitoring of radioactive contamination.
Implementation Method 1
An ionization chamber works by ionizing the gas in the chamber when radiation, such as alpha particles, passes through it. The ionization event leads to the release of electrons and positively charged ions that can be detected as an electrical signal.
Implementation Method 2
A voltage converter DC/DC is provided in the device. The processor MCU is adapted to execute instructions to control how long the charging of the capacitor C takes place and to determine when the voltage on the capacitor C and, therefore, the voltage of the ionization chamber K has reached a previously set maximum value.
Data Source
Figure 1~2
AI summary
The invention relates to devices for the radiation detection and analysis, in particular to portable alpha particle sensors adapted for the identification and quantification of radioactive decay products - alpha particles. The proposed invention is a battery-powered pulse ionization chamber alpha particle sensor comprising at least one electric battery, at least one switch S, a voltage converter DC/DC, a capacitor C, a processor MCU, a current pulse amplifier A, an ionization chamber K with an electrode of zero potential placed therein. The ionization chamber K is designed with the possibility of placing a source of alpha particles in it. Furthermore at least one electric battery is electrically connected to the voltage converter DC/DC by means of a switch S, the operation of which is controllable by the processor MCU. The voltage converter DC/DC is electrically connected to the capacitor C and the ionization chamber K. The electrode of the ionization chamber K is electrically connected to the processor MCU through the current pulse amplifier A. The processor MCU furthermore is adapted to execute the instructions: (i) count electrical pulses N, which coming from the K electrode of the ionization chamber and which are amplified by the amplifier A; (ii) by means of at least one switch S, controllably periodically electrically connect the supply of electric energy from at least one electric battery to the voltage converter DC/DC and further in the circuit; (iii) determine the voltage value on the capacitor C and, upon reaching the previously set maximum value of the voltage, by means of the switch S, electrically disconnect the supply of electric energy from the electric battery to the voltage converter DC/DC and further in the circuit.