Ultracompact/ultralow power electron cyclotron resonance ion source for multipurpose applications

Area of Science:

• Plasma Physics
• Ion Source Technology
• Microwave Discharge

Background:

• Traditional microwave ion sources require significant power.
• Electron cyclotron resonance (ECR) ion sources are widely used but can be power-intensive.
• Need for compact, low-power ion sources for diverse applications.

Purpose of the Study:

• To drastically reduce power consumption in microwave ion sources.
• To develop ultralow-cost ion sources using novel discharge cavity geometries.
• To explore the potential of compact microwave discharge systems for light, plasma, and ion generation.

Main Methods:

• Studied specific discharge cavity geometries for microwave ion sources.
• Operated an electron cyclotron resonance (ECR) ion source at reduced microwave power (< 1 W).
• Utilized transmitter technology similar to cellular phones for microwave power delivery.

Main Results:

• Achieved plasma ignition below 100 mW and typical operating points around 5 W in a 20 mm chamber.
• Observed current densities from 0.1 to 10 mA/cm² (Ar, 4 mm extraction).
• Demonstrated low emittance beams (down to 1 π mm mrad at 15 kV) suitable for surface analysis and treatment.

Conclusions:

• Developed a new type of ultralow-cost, compact microwave ion source (COMIC).
• The COMIC system is versatile, applicable to light, plasma, and ion generation.
• Potential for modularity by connecting multiple COMIC devices for advanced applications.