题　目：A miniature Synchrotron for your Laboratory: The Lyncean Compact Ligth Source and Its Applications

报告人：Ronald D. Ruth，SLAC National Accelerator Laboratory, Stanford University
时　间：03月08日（周三），下午2:30-4:00
地　点：物理馆512会议室
报告摘要：
Synchrotron facilities around the globe are undeniably the “super computers” of X-ray science.  There are more than fifty synchrotrons worldwide serving more than ten thousand researchers.  The light emanating from these sources can be characterized as high flux, monochromatic, energy tunable and in many cases, coherent. They provide a myriad of applications to thousands of researchers, but at a high cost requiring government support, and systemically oversubscribed by an ever expanding user base.  The best available electron impact sources, such as liquid metal jet, fundamentally lack the characteristics required for many state-of-the art X-ray measurements routinely used at synchrotrons.

The Lyncean Compact Light Source (CLS) is the first commercially developed X-ray source specifically created to deliver a true home laboratory alternative to many experiments done today at the large synchrotrons.  X-rays are produced via inverse Compton scattering through the interaction of low energy electrons (25 to 45 MeV) in a miniature storage ring together with and a sub-micrometer period, high powered laser pulse (laser-undulator).   Tunable, monochromatic, and high flux undulator synchrotron radiation is generated in a mini-synchrotron due to the high repetition rate (~60MHz) of this interaction.  Characteristics of the CLS X-ray beam are similar to that of a bending magnet synchrotron in terms of flux and coherence, and as such, similar applications can be performed:  imaging/tomography, diffraction, scattering, and spectroscopy.  The technology behind the Compact Light Source as well as examples of the measurements that can be made will be presented.

个人简介:
Ronald Ruth, Ph.D. is Professor Emeritus at the SLAC National Accelerator Laboratory at Stanford University and is an expert on particle accelerators and the author of numerous publications about particle beam physics and accelerator technology. His research at SLAC concerns the development of new concepts for particle acceleration and beam manipulation for application to both high-energy accelerators and free-electron lasers. During the mid 90's he led the development of the Next Linear Collider Test Accelerator, a test bed for x-band acceleration technology for future high-energy accelerators. The concept for the Lyncean Compact Light Source is a spin off from basic research performed by Professor Ruth and Dr. Zhirong Huang into a new electron damping mechanism called radiative laser cooling.

Professor Ruth has been on review committees for many national laboratories.

He is a fellow of the American Physical Society and is a former member of the APS Council representing the Division of Physics of Beams.