Metal-dielectric structures for high power electron cyclotron resonance ion source

Area of Science:

• Plasma physics
• Ion source technology
• Materials science

Background:

• Electron cyclotron resonance ion sources (ECRIS) are crucial for generating ion beams.
• Plasma ambipolarity and electron temperature significantly impact ECRIS performance.
• High power densities in next-generation ECRIS pose challenges for component survival.

Purpose of the Study:

• To investigate the impact of metal-dielectric (MD) structures on ECRIS performance at high microwave powers.
• To evaluate the potential of MD-structures for new, high-performance ECRIS designs.
• To explore methods for reducing conditioning times associated with MD-structures.

Main Methods:

• Implementation of MD-structures within an ECRIS.
• Operation of the ECRIS at high microwave power levels.
• Analysis of plasma parameters (electron density, temperature) and performance metrics.
• Assessment of heat load reduction due to Bremsstrahlung radiation.

Main Results:

• MD-structures partially restore plasma ambipolarity.
• MD-structures supply cold electrons, enhancing plasma electron density and temperature.
• Significant performance increase observed in the ECRIS.
• MD-structures effectively reduce heat load from Bremsstrahlung radiation.
• Targeted application of MD-structures can shorten conditioning times.

Conclusions:

• MD-structures offer a viable solution for enhancing ECRIS performance, particularly at high power densities.
• The ability to reduce heat load and improve plasma parameters makes MD-structures promising for future ion source development.
• Optimizing the placement of MD-structures can mitigate long conditioning periods, facilitating practical implementation.