Characterization of micrometer-size laser beam using a vibrating wire as a miniature scanner.

A new method for profile measurements of small transverse size beams by means of a vibrating wire is presented. A vibrating wire resonator with a new magnetic system was developed and manufactured to ensure that the wire oscillated in a single plane. Presented evidence gives us confidence that the autogenerator creates vibrations at the natural frequency of the wire in a plane of the magnetic system, and these vibrations are sinusoidal. The system for measuring the laser beam reflected from the vibrating wire by means of a fast photodiode was upgraded. The experiments allowed the reconstruction of a fine structure of the focused beam of the semiconductor laser using only a few vibrating wire oscillations. The system presented here would eventually enable the implementation of tomographic measurements of the thin beam profile.

A method for profile measurements of small transverse size beams by means of a vibrating wire.

A method for profile measurements of small transverse size beams by means of a vibrating wire is proposed. The main idea is to use the vibrating wire motion during its oscillations as a scanning mechanism and synchronously measure the scattered/reflected particles/photons created through the interactions of the measured beam with the wire. The method is expected to be applicable for thin beams in particle accelerators. The proof-of-principle test results, obtained using a laser beam, are presented.

Fast resonant target vibrating wire scanner for photon beam.

We propose a new type of wire scanner for beam profile measurements, based on the use of a vibrating wire as a scattering target. Synchronous measurements with the wire oscillation allow to detect only the signal coming from the scattering of the beam on the wire. This resonant method enables fast beam profiling in the presence of a high level of background. The developed wire scanner, called resonant target vibrating wire scanner, is applied to photon beam profiling, in which the photons reflected on the wire are measured by a fast photodiode. In addition, the proposed measurement principle is expected to monitor other types of beams as well, such as neutrons, protons, electrons, and ions.