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Published on: May 3, 2019
Beam extraction from a Hall-type ion accelerator
Akira Ando1, Masashi Tashiro, Keiichiro Hitomi
1Department of Electrical Engineering, School of Engineering, Tohoku University, Miyagi, Japan.
The Review of Scientific Instruments
|March 5, 2008
Summary
This study explores ion beam extraction from a Hall-type accelerator using permanent magnets. Researchers achieved high current density beams with controllable low energy by adjusting operational parameters and biasing an additional plasma chamber.
Area of Science:
- Plasma Physics
- Accelerator Science
- Ion Beam Technology
Background:
- Hall-type accelerators are crucial for various applications requiring ion beams.
- Understanding beam extraction is key to optimizing accelerator performance.
- Permanent magnets offer advantages in accelerator design and efficiency.
Purpose of the Study:
- To investigate the fundamental characteristics of ion beam extraction from a Hall-type accelerator.
- To examine the influence of operational parameters on beam properties.
- To explore methods for independent control of beam current and energy.
Main Methods:
- Utilized an axial electric field (E(z)) for ion extraction within a plasma channel.
- Employed a radial magnetic field (B(r)) configuration.
- Systematically varied discharge current, voltage, channel length, and gas flow rate.
Main Results:
- Achieved high beam current density exceeding 100 mA/cm(2).
- Demonstrated low beam energy extraction at 50 eV.
- Successfully controlled beam energy independently of beam current via plasma chamber biasing.
Conclusions:
- The Hall-type accelerator with permanent magnets is capable of producing high-current, low-energy ion beams.
- Operational parameters significantly affect beam extraction characteristics.
- Independent control of beam energy is feasible, enhancing accelerator versatility.
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