Folded Voltage Multiplier Ladder for Compact Radiation Generators
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Solution Overview
Problem
The length of traditional electronic radiation generators used in downhole well-logging tools can be a limiting factor for compact applications, as they are typically long devices that hinder the miniaturization of these tools.
Innovation Solution
A compact radiation generator design that folds lower-voltage components of the voltage multiplier ladder over to collocate them, reducing the overall length, and strategically folds the voltage multiplier ladder at specific stages to enable electrical measurements and reduce electrical stresses, while maintaining high-voltage efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a traditional linear arrangement of voltage multiplier ladder components is used, then the electrical connection and voltage multiplication function are ensured, but the length of the radiation generator becomes excessive for compact downhole tools
Solution Approach 1:
The voltage multiplier ladder is folded at a turnover point to change its spatial arrangement from a linear one-dimensional layout to a three-dimensional folded configuration. This allows the ladder to occupy less linear length along the tool axis while maintaining the necessary electrical connection path and voltage multiplication stages, effectively resolving the contradiction between compact length and functional complexity.
2Length of stationary object
If the voltage multiplier ladder is folded to reduce length, then the linear dimensions are reduced for compact tools, but electrical stresses may increase due to the folded configuration
Solution Approach 1:
The turnover point in the folded voltage multiplier ladder is specifically positioned at an intermediate voltage stage rather than at the high-voltage end. This local placement strategy ensures that the fold occurs where electrical stresses are lower, allowing the compact folded configuration to reduce linear length while avoiding concentration of high electrical stresses at the turnover point, thus maintaining electrical reliability.
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
The compact design allows for a significant reduction in the length of the radiation generator, enhancing the feasibility of its use in constrained downhole tools while maintaining the ability to generate high-voltage radiation for effective well-logging measurements.
Implementation Method 1
The electronic radiation generators may use high-voltage sources to cause charged particles to accelerate toward a target. When the charged particles strike the target, radiation such as neutrons or x-rays may be generated.
Implementation Method 2
a first voltage multiplier ladder in the cavity configured to supply the sufficiently high voltage to the acceleration tube
Data Source
AI summary
A compact radiation generator for use in a downhole well-logging tool is disclosed. The compact radiation generator comprises a housing with a cavity, a linear acceleration tube in the cavity that generates radiation when supplied with a sufficiently high voltage, and a first voltage multiplier ladder in the cavity configured to supply the sufficiently high voltage to the acceleration tube. The first voltage multiplier ladder is folded into two linear parts that are collocated to each other.