The field resulting from a beam incident upon a planar dielectric layer placed between media having different refractive indices is examined by using both an approximate approach and a highly accurate Gaussian-beam analysis. We find that, if the incidence angle is adjusted to couple energy to a leaky wave that may be guided by the layer, both the reflected and the transmitted beams may undergo ...

The Canadian Light Source (CLS) storage ring has been operating routinely since commissioning was completed in the spring of 2004. Beam currents up to 230 mA have been achieved with the single superconducting RF cavity. With steady improvement beam lifetimes (1/e) of 14 hours at 200 mA and 0.5% coupling are now possible. In the last year the vertical tune was increased by 1 integer to produce a...

We investigate the bilinear and biquadratic interlayer exchange coupling in Co/Fe/MgO/Fe(001). Samples are grown through molecular beam epitaxy and the interlayer exchange coupling is measured through magneto-optic Kerr effect along wedge samples. By varying the location of Fe impurities between the interface and middle of the MgO spacer, we find that the couplings are enhanced and are dependen...

Rf power at 2856 MHz has been obtained from the SLAC proof of principle lasertron. Experiments show that the electron beam is well bunched when the laser beam is well dispersed, the voltage high, and the current density low. However, if any of the these criteria is not met, space charge forces can cause significant debunching. The maximum beam power to rf power conversion efficiency was 12.3%, ...

A beam-control system to write gratings on a holographic plane is studied. The arrangement is designed to interconnect two 1024 monomode fiber arrays. The beam-control system is composed of two subsystems: a beam steerer, which deflects one incident beam toward 1024 positions, and a collimating system, which adapts the shape of the deflected beam to the holographic plane. The collimating system...

We study interlayer exchange coupling in epitaxial Fe/Fe(0.56)Si(0.44)/Fe trilayers. Iron-silicide spacers with high structural and compositional homogeneity for thicknesses up to 34 A are grown by coevaporation from two electron-beam sources. The coupling strength oscillates with spacer thickness for temperatures from 20 to 300 K with two antiferromagnetic maxima at 12 and 26 A, and it clearly...