Periodic structure of different dielectric layers for dielectric laser accelerators

Area of Science:

• Physics
• Particle Accelerators
• Materials Science

Background:

• Relativistic electron acceleration is crucial for various scientific applications.
• Current dielectric laser accelerators face limitations in acceleration gradient and efficiency.

Purpose of the Study:

• To propose and investigate a new periodic dielectric structure for enhanced relativistic electron acceleration.
• To optimize the structure for increased acceleration gradient and factor.

Main Methods:

• Design and simulation of a periodic structure with multiple dielectric layers.
• Analysis of the electric field distribution and electron beam interaction within the structure.
• Parametric optimization of the structure for performance enhancement.

Main Results:

• The proposed structure achieves an acceleration gradient exceeding 0.7 GV/m, more than double that of dual-grating structures.
• Enhanced acceleration gradient is achieved without significantly increasing the internal electric field.
• The maximum achievable acceleration factor is increased by over 100%.

Conclusions:

• The novel periodic dielectric structure offers a highly efficient method for relativistic electron acceleration.
• This design enables wider electron channels and reduces required laser fluence.
• The findings contribute to the development of more efficient dielectric laser accelerators.