Multi-Mode Ion Source for Single and Multicharged Ion Generation
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Solution Overview
Problem
Existing ion sources are inefficient and costly as they require multiple sources to generate ions with different charges, and switching between them is time-consuming, making it difficult to quickly change modes for creating singly or multicharged ions, especially for metals like aluminum.
Innovation Solution
An indirectly heated cathode ion source with a vaporizer and multiple gas inlets allows for operation in different modes by controlling the flow of inert gases and organoaluminum gases, enabling the creation of both single and multicharged ions through various configurations of the heater and valve operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple ion sources are used to generate ions with different charges, then the ability to create both singly charged and multicharged ions is improved, but the device complexity and cost increase
Solution Approach 1:
The ion source is designed to perform multiple functions by switching between different gas inputs (inert gas for singly charged ions, organometallic gas for multicharged ions) and different heating modes (vaporizer on/off), allowing a single device to replace multiple specialized ion sources
Solution Approach 2:
The ion source incorporates dynamic control elements including a vaporizer that can be heated to different temperatures and valves that can switch between different gas sources, enabling the system to adapt its operation mode based on the desired ion charge state
2Adaptability or versatility
If multiple ion sources are used to generate ions with different charges, then the ability to create both singly charged and multicharged ions is improved, but the time required to switch between modes increases
Solution Approach 1:
Multiple gas input systems (inert gas source and organometallic gas source) and control mechanisms (vaporizer, valves) are merged into a single integrated ion source structure, allowing instantaneous switching between operation modes without the time penalty of physically replacing entire ion sources
3Device complexity
If a single ion source is used for both singly charged and multicharged ion production, then the device complexity is reduced, but the ion production efficiency for specific charge states may decrease
Solution Approach 1:
The ion source creates locally optimized conditions for different ion production modes by controlling which gas enters the arc chamber and whether the vaporizer is active, allowing high efficiency ion production for the desired charge state without compromising the other mode's potential efficiency
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 efficient and cost-effective generation of ions with varying charges using a single ion source, allowing quick mode switching and effective ion production, particularly for metals like aluminum, by utilizing a vaporizer and multiple gas sources.
Implementation Method 1
a heater to heat dopant material disposed within the vaporizer
Implementation Method 2
an indirectly heated cathode disposed in the arc chamber, wherein the indirectly heated cathode is used to generate a plasma in the arc chamber
Data Source
AI summary
An ion source that is capable of different modes of operation is disclosed. A vaporizer is in communication with the ion source. The ion source may have several gas inlets, in communication with different gasses. When operating in a first mode, the ion source may supply a first gas, such as an inert gas, while heating the vaporizer. When operating in a second mode, the ion source may supply a second gas, which may be an organoaluminium gas. When operating in a third mode, the ion source may supply the second gas, while heating the vaporizer. Ions having single charges may be created in the first and second modes, while ions having multiple charges may be created in the third mode.