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Development of a miniaturized duoplasmatron ion source
1Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
The Review of Scientific Instruments
|February 5, 2020
Summary
A compact duoplasmatron ion source was developed for versatile applications. Its performance was validated, demonstrating a 1 µA ion beam current at 5 mA discharge current, suitable for various scientific instruments.
Area of Science:
- Physics
- Engineering
- Materials Science
Background:
- Miniature ion sources are crucial for compact scientific instruments.
- Duoplasmatron sources offer high ion current densities.
- Integration with standard flanges simplifies experimental setups.
Purpose of the Study:
- To design and test a miniature duoplasmatron ion source.
- To evaluate its performance characteristics.
- To assess its compatibility with standard laboratory equipment.
Main Methods:
- A duoplasmatron ion source was designed for a 34 mm copper gasket flange.
- A hollow cathode facilitated a stable discharge with <10 W power for Argon.
- Ion beam current was measured using a Faraday cup 200 mm downstream.
Main Results:
- A stable discharge was achieved with low power consumption.
- Maximum ion beam current of 1 µA was obtained at 5 mA discharge current (390 V discharge, 2 kV extraction).
- Higher discharge voltages were needed for hydrogen gas operation.
Conclusions:
- The designed miniature duoplasmatron ion source is functional and compact.
- It achieves significant ion beam current suitable for various applications.
- The source demonstrates adaptability to different gases, with hydrogen requiring adjusted parameters.
