Wavefront shaping allows for ultimate control of light propagation in multiple-scattering media by adaptive manipulation of incident waves. We shine two separate wavefront-shaped beams on a layer of dry white paint to create two enhanced output spots of equal intensity. We experimentally confirm by interference measurements that the output spots are almost correlated like the two outputs of an ...

Conical diffraction of linearly polarised light in a biaxial crystal produces a beam with a crescent-shaped intensity profile. Rotation of the plane of polarisation produces the unique effect of spatially moving the crescent-shaped beam around a ring. We use this effect to trap microspheres and white blood cells and to position them at any angular position on the ring. Continuous motion around ...

Abstract A multi-beam X-ray optics that can image a sample from different directions in large angular range simultaneously without rotation is reported. It consists of 28 thin silicon crystals are arranged σ-polarization diffraction geometry so the diffracted X-rays an incident white synchrotron radiation beam pass through sample. tomogram simple test was calculated projection images recorded w...

In this paper, we suggest a novel system that is capable of measuring absolute distances with an uncertainty of one micrometer, or better, over a distance of up to 20 meters. This system consists of a Michelson interferometer, a tunable external cavity diode laser, a wavelength meter, a digital camera and a computer. The Michelson interferometer contains a reference arm mirror, a target arm mir...

White-beam slits are precision high-heat-load devices used on beamlines of the Advanced Photon Source (APS) to trim and shape the incoming x-rays beam before the beam is transmitted to other optical components. At the APS, the insertion devices that generate the x-ray are very powerful. For example, the heat flux associated with an x-ray beam generated by Undulator A will be on the order of 207...

A novel X-ray beam-position detection device that we call a position-sensitive photoconductive detector (PSPCD) is designed to have synthetic diamond as its substrate material. We proved that it is feasible to use synthetic diamond to make a hard X-ray position-sensitive detector based on the photoconductivity principle and that it acts as a solid-state ion chamber. Experiments on different PSP...

The paper describes the Beam Position Measurement hardware developed for the drive beam linac of the CLIC Test Facility 3 (CTF3). The system, capable of measuring both, the beam position and absolute current, is a part of an R&D facility and should therefore be flexible to work in unforeseen conditions. For that reason, its operation can be changed gradually from completely automatic, controlle...