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"Dielectric laser accelerator – a vision

toward chip-size accelerator and x-ray laser pointer"

Date:

Download-files:

Time:

Thursday, 24. Oct. 2019

Video-Recording for any system with MP4-support

- Video.mp4 (ca.454 Mb)

09:15 – 10:15

Yen-Chieh Huang

(Institute of Photonics Technology, National Tsing Hua University, Taiwan

(Applied Physics (KTH)))

The size of a particle accelerator scales with the wavelength of the electromagnetic wave

powering the accelerator structure. An optical-frequency accelerator built in dielectric is

expected to be 100,000 times smaller than a conventional RF-frequency accelerator built

in copper. Compared with copper, a dielectric has a much higher damage resistance to a

laser field for high-gradient particle acceleration. Built upon lithographic technologies,

a dielectric laser accelerator (DLA), operating at the optical frequencies with a pulse rate

close to 1 GHz and an acceleration gradient up to 1 GV/m, is expected to generate high-

energy attosecond electron bunches from a microchip with a moderate beam current.

The bunched electrons are well suited for generating highly efficient electron superadiance

in the EUV and x-ray spectrum. In this talk, I will first review and update the R&D of such

accelerators in the past 20 years. I will then aggressively compare the peak and average

brilliance of envisioned DLA-driven x-ray radiation sources against the 3rd– and 4th-

generation synchrotron light sources. Since a DLA operates with a much smaller beam

current, superior performance of a DLA-driven radiation source stands out when the

brilliance under comparison is normalized to the beam power.