Dynamic Gate Voltage Control for X-ray Electron Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electron emission devices used in X-ray generation often require unnecessarily high operating voltages due to varying electron emission characteristics, leading to inefficiency and high-voltage stress, as they are typically controlled by a fixed gate voltage that may exceed the required threshold for all devices in an array.
Innovation Solution
An electron emission device control apparatus that includes a cathode current detector, a reference voltage generator, and a gate voltage controller to dynamically adjust the gate voltage based on the cathode current and gate current, ensuring the gate-cathode voltage is only at the threshold required for electron emission, thereby maintaining a constant anode current and optimizing voltage usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed gate voltage is applied to all electron emission devices in an array, then all devices can be turned on, but the operating voltage becomes unnecessarily high for devices with lower emission thresholds
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed gate voltage to a dynamically adjustable gate voltage. The control apparatus measures the actual gate-cathode voltage required for each electron emission device and adjusts the gate voltage accordingly, allowing each device to operate at its optimal voltage level rather than a uniform high voltage, thus reducing overall operating voltage while maintaining emission reliability
Solution Approach 2:
The patent implements parameter changes by modifying the gate voltage parameter based on measured electron emission characteristics. The control apparatus determines the specific gate-cathode voltage needed for each device and adjusts the gate voltage parameter to match the actual requirements, converting from a static parameter to a dynamically optimized parameter that reduces unnecessary voltage application
2Reliability
If a high gate voltage is applied to ensure electron emission from all devices, then electron emission is reliable, but high-voltage stress is imposed on the equipment
Solution Approach 1:
The control apparatus dynamically adjusts the gate voltage to the minimum level required for each electron emission device, preventing excessive voltage application. By continuously monitoring and adapting the gate voltage to actual device characteristics, the system maintains reliable electron emission while minimizing high-voltage stress on equipment
Solution Approach 2:
The patent employs feedback by measuring the actual gate-cathode voltage and electron emission performance, then using this information to adjust the gate voltage. The control apparatus creates a closed-loop system where voltage application is continuously optimized based on actual device response, ensuring reliable emission without unnecessary high-voltage stress
3Adaptability or versatility
If the gate voltage is fixed based on the highest voltage requirement, then all devices can operate, but devices with lower requirements experience unnecessary voltage increase
Solution Approach 1:
The patent applies local quality by treating each electron emission device individually with its own optimized gate voltage setting. Rather than applying a uniform high voltage to all devices, the control apparatus determines and applies the specific voltage level needed for each device's local characteristics, allowing devices with lower requirements to operate at lower voltages while maintaining overall system compatibility
Solution Approach 2:
The system transitions from a static fixed gate voltage to a dynamic individually-adjusted gate voltage for each device. The control apparatus enables each device to adapt its operating voltage to its specific emission characteristics, maintaining device compatibility while eliminating unnecessary voltage increases for devices with lower requirements
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 allows for efficient control of anode current and reduced operating voltage, preventing high-voltage stress and improving the overall efficiency of electron emission devices by adjusting the gate voltage according to the specific characteristics of each device in the array.
Implementation Method 1
when the gate-cathode voltage is above a voltage required for electron emission according to the electron emission characteristics of the cathode electrode, the electron emission device can be turned on so as to emit electrons from the cathode electrode
Data Source
AI summary
The present invention relates to a device of controlling an electron emission device generating X-rays, the device comprising: an electron emission device including at least one of at least one cathode electrode, an anode electrode paired with the cathode electrode, and a gate electrode for controlling a current flowing through the anode electrode; a cathode current detection part for detecting a current flowing through the cathode electrode of the electrode emission device; a reference voltage generation part for generating a reference voltage; and a gate voltage control part which receives the reference voltage and a detection voltage of the cathode current detection part, determines a gate voltage for controlling the electron emission device so that the detection voltage of the cathode current detection part becomes equal to the reference voltage, and applies the determined gate voltage to the gate electrode of the electron emission device.