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.
US DOE, Washington, USA
OHEP/DOE, Germantown, MD, USA
Since the Accelerators for America's Future (AfAF) Symposium in 2009, the U.S. Dept. of Energy’s Office of High Energy Physics (DOE-HEP) has worked toward broadening its accelerator R&D activities beyond support of only discovery science to include medicine, energy and environment, defense and security, and industry. Accelerators play a key role in many aspects of everyday life, and improving their capabilities will enhance U.S. economic competitiveness. In 2011, a SLAC-led task force was initiated by HEP to develop more fully the information from the original AfAF Symposium. Subsequently, a DOE-HEP concept (coordinated with the other cognizant Office of Science program offices) was developed for accelerator R&D stewardship. Here we describe the evolution of the stewardship task starting from its origins in the ongoing accelerator R&D program, the mission of the new program, and initial steps being taken to implement it. Several initiatives are currently being considered to launch the program, and these will be indicated. Involvement of the accelerator community in developing ideas for future stewardship activities will be crucial to the ultimate success of the program.