MOOBB2
Stanford University, Stanford, California, USA
OHEP/DOE, Germantown, MD, USA
SLAC, Menlo Park, California, USA
UCLA, Los Angeles, USA
We report the first observation of high-gradient acceleration of electrons in a lithographically fabricated micron-scale dielectric optical accelerator driven by a mode-locked Ti:sapphire laser. We have observed acceleration gradients far exceeding those of conventional microwave accelerator structures. Additionally, we have verified the dependence of the observed acceleration gradient on: the laser pulse energy, the laser-electron temporal overlap, the polarization of the laser, and the incidence angle of the laser. In all cases, we have found good agreement between the observed results, the analytical predictions, and the particle simulations.
SLAC, Menlo Park, California, USA
Stanford University, Stanford, California, USA
Rapid progress in the development of laser technology and in the sophistication of semiconductor manufacturing has enabled the realization of the first dielectric laser-driven particle accelerator (DLA) on a chip *. Since the accelerating channel in DLA structures typically have dimensions in the 1 micron range, the ability to precisely control particle position within these structures will be critical for operation. A number of beam deflection and focusing schemes have been devised, but without the ability to measure the position of the particle beam to nanometer accuracy, these schemes will be extremely difficult to implement. We present a new concept for a beam position monitor with the unique ability to map particle beam position to a measurable wavelength. Coupled with an optical spectrograph, this beam position monitor is capable of sub-nanometer resolution. We describe one possible design of this device, and present the current status of the structure fabrication and experimental demonstration.
* E. A. Peralta, et al., "High-Gradient Acceleration of Electrons in a Laser-Driven Dielectric Micro-Accelerator." Submitted to PAC'13