Electrostatic Ion Accelerator Anode Thermal Radiation Management
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Solution Overview
Problem
Existing electrostatic ion accelerator arrangements face heat loss issues at the anode, leading to increased cooling requirements and potential faults due to residual energy from electrons striking the anode, which limits drive power and necessitates complex cooling methods.
Innovation Solution
A simple anode arrangement with a graphite anode electrode and strategically placed thermal radiation reflectors directs thermal radiation predominantly into the ionization chamber and beam exit opening, minimizing solid-state heat conduction losses and eliminating the need for active cooling by leveraging the high emissivity of the anode surface facing the ionization chamber and using reflector surfaces to redirect thermal radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If complex cooling systems are used to dissipate heat from the anode, then heat loss is reduced, but device complexity increases
Solution Approach 1:
The patent extracts the heat dissipation function from complex active cooling systems and implements it through passive thermal radiation. The anode arrangement is designed to emit thermal radiation directly into the ionization chamber, converting the heat management problem into a radiative heat transfer problem that eliminates the need for mechanical cooling components.
Solution Approach 2:
The patent replaces mechanical cooling systems (fluid cooling, solid-state heat dissipation) with a thermal radiation-based heat dissipation mechanism. The anode arrangement utilizes thermal radiation to dissipate heat, substituting complex mechanical cooling infrastructure with a simpler radiative heat transfer process that occurs naturally at the operating temperatures.
2Temperature
If active cooling is implemented to manage anode heat loss, then heat dissipation improves, but reliability decreases due to additional fault-prone components
Solution Approach 1:
The anode arrangement performs self-cooling through thermal radiation emitted into the ionization chamber. The system uses its own operational characteristics (electron impact heating the anode) to drive the heat dissipation process, eliminating the need for external cooling systems and associated reliability concerns.
Solution Approach 2:
The patent removes active cooling components from the system entirely, extracting the heat dissipation function and implementing it through passive radiative heat transfer. This elimination of mechanical cooling components directly addresses the reliability issue by removing fault-prone parts from the system.
3Temperature
If thermal radiation is directed away from the ionization chamber, then heat loss from anode is reduced, but drive power is limited
Solution Approach 1:
The patent converts the harmful thermal radiation emitted by the anode into a beneficial heat transfer mechanism. Instead of trying to contain heat within the anode, the design allows thermal radiation to be emitted directly into the ionization chamber, using the heat to pre-ionize the working gas and improve overall drive power efficiency.
Solution Approach 2:
The patent changes the heat dissipation parameter from conductive/convective cooling to radiative heat transfer. By designing the anode arrangement with specific surface properties and orientations that favor thermal radiation emission into the ionization chamber, the system achieves effective heat dissipation while simultaneously improving drive power through enhanced gas ionization.
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 configuration effectively manages heat dissipation through thermal radiation, maintaining high anode temperatures without requiring active cooling, as the majority of heat loss is handled through radiation, reducing the need for complex cooling systems and ensuring stable operation.
Implementation Method 1
the dissipation of the heat loss primarily caused by the energy of the electrons striking the anode, at least during full-load operation, predominantly (greater than 50%) in the form of thermal radiation in the direction of the ionization chamber
Implementation Method 2
Arranging a thermal radiation reflector device on the side of the anode electrode facing the ionization chamber facing away from the ionization chamber, the thermal radiation is increasingly directed into the ionization chamber and towards the beam exit opening
Implementation Method 3
supplying the cold, neutral working gas while flowing around the anode arrangement, with the working gas absorbing heat from the anode arrangement and transporting it into the ionization chamber
Data Source
Figure 1
AI summary
An arrangement with radiation cooling of the anode, which avoids the need for complex additional cooling measures, is proposed for an electrostatic ion accelerator arrangement in which the thermal power loss which is not negligible occurs at the anode, which is arranged in an ionization chamber, during operation.