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Features of semiplanotron surface plasma sources
1Muons, Inc., Batavia, Illinois 60510, USA. vadim@muonsinc.com
The Review of Scientific Instruments
|March 3, 2012
Summary
Semiplanotron surface plasma sources (SPS) with cesiation enhance negative ion beam production. Modern designs achieve high efficiency, with versions for DC operation and heavy ion generation.
Area of Science:
- Plasma Physics
- Ion Beam Technology
- Surface Science
Background:
- Surface plasma sources (SPS) are crucial for generating negative ion beams.
- Cesiation in SPS enhances the efficiency of negative ion production.
- Semiplanotron designs have evolved significantly over time.
Purpose of the Study:
- To review the development and features of semiplanotron surface plasma sources (SPS) with cesiation.
- To analyze design variations, including geometric focusing, for improved performance.
- To discuss modifications for direct current (DC) operation and heavy negative ion generation.
Main Methods:
- Review of historical and modern semiplanotron designs.
- Analysis of geometric focusing principles (cylindrical and spherical).
- Examination of negative ion production mechanisms within cesiated SPS.
Main Results:
- Semiplanotron SPS with cesiation demonstrate high efficiency in negative ion beam production.
- Specific designs achieve efficiencies up to 0.1 A of H(-) per kW of discharge power.
- Modifications enable continuous wave (CW) operation and production of heavy negative ions.
Conclusions:
- Semiplanotron SPS with cesiation represent a mature technology for efficient negative ion generation.
- Design advancements have led to significant improvements in performance and versatility.
- Further modifications cater to specialized applications, including DC operation and heavy ion beams.
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