Higher order modes (HOM) can have a destructive influence on the beam emittance in the future linear colliders. Therefore it is important that the quality factor of the high impedance modes be damped under a safe level. Although attentive care was taken in designing the superconducting 9-cell cavities and the HOM couplers for the TESLA collider, a high Q and high impedance mode was discovered i...

A new vibration control system, Damped braced tube is developed for adopting on super high-rise buildings in central Tokyo. This system consists of frame using elastic braces and damped slit where a portion are replaced by dampers. acting as link beam coupled shear wall can dissipate seismic energy very efficiently contribute to succeeding meet higher criteria. paper describes outline efficienc...

Properties of the wall impedance of a storage ring are studied for a low relativism, 1 1: Both broad and narrow band impedances are shown to be damped at low energies, the damping factors are found. Coherent motion of a coasting beam is discussed; Landau decrements are calculated.

We study a coupled fluid-structure system. The structure corresponds to a part of the boundary of a domain containing an incompressible viscous fluid. The structure displacement is modeled by a damped beam equation. We prove the existence of strong solutions to our system for small data and the existence of local strong solutions for any initial data.

When a left-circularly polarised Gaussian light beam, which has spin angular momentum (SAM) J(sp) = sigmah = 1h per photon, is incident along one of the optic axes of a slab of biaxial crystal it undergoes internal conical diffraction and propagates as a hollow cone of light in the crystal. The emergent beam is a superposition of equal amplitude zero and first order Bessel like beams. The zero ...