THz-driven dielectric particle accelerator on chip.

Area of Science:

• Physics
• Accelerator Science
• Optics

Background:

• Terahertz (THz)-driven particle accelerators are gaining attention for their potential.
• Developing high-energy-gain THz accelerators on chip remains a significant challenge.
• Existing dielectric-lined waveguide THz linacs suffer from waveguide dispersion.

Purpose of the Study:

• To propose a novel concept for an on-chip THz-driven particle accelerator.
• To enhance electron energy gain and accelerated bunch charge.
• To overcome limitations of existing THz accelerator designs.

Main Methods:

• Utilizing few-cycle THz pulses to drive dielectric prisms.
• Employing prism stacks to mitigate asynchronization effects for low-energy particles.
• Comparing the proposed scheme with on-chip dielectric laser accelerators.

Main Results:

• The proposed design avoids serious waveguide dispersion inherent in dielectric-lined waveguides.
• It significantly enhances electron energy gain compared to previous THz linacs.
• The use of prism stacks allows for longer acceleration lengths and higher energy gains.
• The scheme enhances accelerated bunch charge compared to dielectric laser accelerators.

Conclusions:

• The proposed on-chip THz-driven particle accelerator concept offers enhanced performance.
• It overcomes key challenges in waveguide dispersion and asynchronization.
• This technology promises an attractive solution for compact, high-energy particle acceleration on chip.