■ Abstract The Jefferson Laboratory’s superconducting radiofrequency (srf ) Continuous Electron Beam Accelerator Facility (CEBAF) provides multi-GeV continuouswave (cw) beams for experiments at the nuclear and particle physics interface. CEBAF comprises two antiparallel linacs linked by nine recirculation beam lines for up to five passes. By the early 1990s, accelerator installation was proceed...

Large radar antennas are generally covered with radomes to protect them from extreme weather conditions and to enable their continuous precision operation without sacrificing their performance. The radomes are assembled from many panels connected together with metallic or dielectric beams because of their large size. The panels are made of thin membranes or type A sandwiches which are optimized...

Position and momentum were the first pair of conjugate observables explicitly used to illustrate the intricacy of quantum mechanics. We have extended position and momentum entanglement to bright optical beams. Applications in optical metrology and interferometry require the continuous measurement of laser beams, with the accuracy fundamentally limited by the uncertainty principle. Techniques ba...

The interactions of pulsed and continuous wave (CW) Gaussian beams with double negative (DNG) metatmaterials are considered. Subwavelength focusing of a diverging, normally incident pulsed Gaussian beam with a planar DNG slab is demonstrated. The negative angle of refraction behavior associated with the negative index of refraction exhibited by DNG metamaterials is demonstrated. The transmitted...

Recently, a large amount of studies have been related to nonlinear systems with multi-degrees of freedom as well as continuous systems. The purpose of this paper is to optimize passive vibration absorbers in linear and nonlinear states for an Euler-Bernoulli beam with a nonlinear vibratory behavior under concentrated moving load. The goal parameter in the optimization is maximum deflection of t...

Reinforced concrete, RC beams subjected to shear failure which is the most unwanted mode due speed progress studied numerically. Therefore, effective design of necessary because sudden types these in shear. The minimum reinforcement ratio must be provided around longitudinal rebars. Thus, stirrups with different patterns have a significant benefit for improving beam. In this paper, performance ...

Photon bunching in incoherent cathodoluminescence (CL) spectroscopy originates from the fact that a single high-energy electron can generate multiple photons when interacting with material, thus, revealing key properties of electron–matter excitation. Contrary to previous works based on Monte Carlo modeling, here we present fully analytical model describing amplitude and shape second order auto...