Ion Source Filter Electrode for High Purity Polyvalent Ion Output
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ion beams from existing laser utilizing ion sources contain high ratios of impurities such as cluster ions with large mass and positive ions with low valence, which can pollute linear accelerators when low-purity polyvalent ions are introduced.
Innovation Solution
An ion source design that includes a target with a first power supply to set its electric potential higher than the acceleration channel and a second power supply to set the electric potential of a filter electrode higher than the target, allowing only polyvalent positive ions to pass through, thereby improving ion beam purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a laser utilizing ion source generates plasma through laser irradiation on a target, then polyvalent positive ions are effectively generated, but the ion beam contains high ratios of impurities such as cluster ions with large mass and positive ions with low valence
Solution Approach 1:
A filter electrode is introduced as an intermediary component between the target and the acceleration channel. This filter electrode applies a specific electric potential to selectively transmit ions based on their energy characteristics, allowing polyvalent ions to pass while blocking cluster ions and low-valence ions, thus purifying the ion beam without reducing the quantity of desired ions
Solution Approach 2:
The electric potential of the filter electrode is adjusted as a controllable parameter to optimize ion beam purity. By changing the potential value, the selection criteria for ion transmission is modified, enabling selective filtering of impurities while maintaining transmission of polyvalent ions. This parameter adjustment allows dynamic control over the balance between ion quantity and purity
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 design effectively filters out impurities, enhancing the purity and efficiency of polyvalent positive ion output, as demonstrated by the adjustment of the second voltage E2, which increases the ion current of higher valence ions and reduces low valence ion intensity.
Implementation Method 1
generates plasma through irradiating the condensed laser beam to a solid target
Implementation Method 2
evaporates and ionizes the element of the target by the laser energy
Implementation Method 3
evaporates and ionizes the element of the target by the laser energy
Implementation Method 4
a second power supply source (second voltage E2) that sets an electric potential of on a path (corresponding to a filter electrode 15) from the target 12 to the destination 18 higher than that of the target 12
Data Source
AI summary
Provide an ion source for outputting ion beam with high purity of polyvalent positive ion.The ion source 10 includes: a target 12 from which electron and positive ion are generated by plasma formed by laser 13 irradiation; a first power supply source (first voltage E1) that sets an electric potential of the target 12 higher than that of a destination of the positive ion (corresponding to an acceleration channel 18 in FIG. 1); and a second power supply source (second voltage E1) that sets an electric potential of on a pass (corresponding to a filter electrode 15 in FIG. 1) from the target 12 to the destination 18 higher than that of the target 12.