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Researchers demonstrate a novel scheme for stable beam transport in dielectric-laser accelerators, paving the way for compact, MeV-range electron sources. This breakthrough enables microchip-manufactured accelerators for attosecond and accelerator physics applications.

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Area of Science:

  • Physics
  • Particle Acceleration
  • Optics

Background:

  • Dielectric-laser acceleration offers high gradients but lacks stable beam transport.
  • Previous experimental demonstrations of stable beam transport and staging are missing.

Purpose of the Study:

  • To present a novel scheme for stable beam transport and staging in dielectric-laser accelerators.
  • To enable optimized injection into transport, bunching, and accelerating structures within a microchip-compatible design.

Main Methods:

  • A scheme is presented that confines the particle beam longitudinally and in one transverse direction.
  • Confinement in the other transverse direction is achieved using a conventional quadrupole magnet.
  • Matched distributions were found for injection into structures with a 420 nm aperture.

Main Results:

  • The proposed scheme enables stable beam transport and staging, overcoming previous experimental limitations.
  • The developed structures are the photonics analogue of the radio frequency quadrupole.
  • The two-dimensional design is manufacturable on a microchip using lithographic techniques.

Conclusions:

  • This work is a crucial step towards developing low-cost, handheld devices for generating relativistic electrons in the MeV range.
  • The findings bridge the fields of attosecond physics and accelerator physics.