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Demonstration of electron acceleration in a laser-driven dielectric microstructure
E A Peralta1, K Soong, R J England
1Department of Applied Physics, Stanford University, Stanford, California 94305, USA.
Nature
|October 1, 2013
Summary
Researchers demonstrate high-gradient electron acceleration in dielectric laser accelerators (DLAs), a compact and economical alternative to conventional particle accelerators. This breakthrough paves the way for smaller, more affordable accelerators for various applications.
Area of Science:
- Particle accelerators
- Laser-driven acceleration
- Dielectric laser accelerators (DLAs)
Background:
- Conventional radio-frequency accelerators are large and costly.
- There is a need for more compact and economical acceleration technologies.
- Dielectric laser accelerators (DLAs) offer potential for higher accelerating fields and lower costs.
Purpose of the Study:
- To demonstrate electron acceleration in a micro-fabricated dielectric laser accelerator (DLA).
- To achieve high accelerating gradients exceeding conventional methods.
- To validate DLA technology for future compact accelerator development.
Main Methods:
- Utilized a fused silica grating structure as the DLA.
- Powered the DLA with an 800-nm-wavelength mode-locked Ti:sapphire laser.
- Measured energy modulation of relativistic (60-MeV) electrons over 563 optical periods.
Main Results:
- Achieved high-gradient acceleration exceeding 250 MeV/m.
- Observed energy modulation in agreement with theoretical models and simulations.
- Demonstrated successful acceleration in a DLA structure for the first time.
Conclusions:
- DLAs represent a promising technology for compact and cost-effective particle acceleration.
- This work validates the potential of DLAs for applications ranging from medical imaging to fundamental research.
- Future multi-staged DLA devices could lead to table-top accelerators and reduced collider costs.
