Measurement of synchrotron-radiation-excited Kossel patterns

Measurement of synchrotron-radiation-excited Kossel patterns.

Kossel line patterns contain information on the crystalline structure, such as the magnitude and the phase of Bragg reflections. For technical reasons, most of these patterns are obtained using electron beam excitation, which leads to surface sensitivity that limits the spatial extent of the structural information. To obtain the atomic structure in bulk volumes, X-rays should be used as the exc...

Synchrotron Radiation/lasers and Doubly-excited Atoms

This report highlights a series of joint theoretical and experimental collaborations which started over ten years ago in Taiwan. The recent topic program Synchrotron Radiation and Multiply-excited Atoms, sponsored by the National Center for Theoretical Sciences (NCTS) at Tsinghua University in Hsinchu and organized by K. T. Chung and C. S. Hsu, o®ers an excellent opportunity for many of us to w...

Synchrotron Radiation and Pretzeled Orbits Geometry of Synchrotron Radiation Illumination

Turning on a `pretzel' , or any closed orbit distortion, can substantially alter the path of synchrotron radiation (SR), in some instances causing it to strike components not designed to absorb the radiation. In this paper I develop equations useful in determining the source position and angle of dipole SR as a function of the pretzel amplitude and angle. Formula for linear power deposition and...

Xray, ultraviolet, and synchrotron radiation excited innervalence photoelectron spectra of CH4

Electroweak Synchrotron Radiation*

We calculate the emission rate and spectrum for radiation of neutral electroweak bosons (Z”) f rom an electron in a weak external homogeneous electromagnetic field satisfying 1 f Fcly Fp”/1/2 < Fc 3 mzc3/eti. The calculational method is based on the source theory formulation of quantum field theory introduced by Schwinger. In particular for ultra-relativistic electrons, we find that the 2’ emis...