TUP115 　レーザー　 8月1日 第1,2,3,4会議室他 13:00 - 15:00

非相対論的エネルギー領域で電子の共振器型レーザー駆動誘電体加速

Resonant dielectric laser acceleration of nonrelativistic electrons

○陳 昭福，小山 和義，上坂 充（東大），吉田 光宏（高エネ研）

○Zhaofu Chen, Kazuyoshi Koyama, Mitsuru Uesaka (UTokyo), Mitsuhiro Yoshida (KEK)

We describe a resonant slab-symmetric dielectric laser accelerator for subrelativistic electrons. The structure consists of high refractive index alternating dielectric layers separated by a vacuum channel where the electrons travel through. The dielectric layer adjacent to the vacuum channel serves as a matching layer to support an accelerating mode with a phase velocity equals the speed of electron, while the outer layers form a Bragg reflector. The mode is excited by a laser side-coupled into the vacuum gap through periodic slots. Three-dimensional simulation were conducted to verify the field patterns. Acceleration gradient of 200 MeV/m for could be achieved without damage.