Vibrating wires for beam diagnostics

TL;DR

This paper introduces a vibrating wire technique for beam diagnostics that measures wire heating via frequency changes, offering high sensitivity for detecting beam halos and weak beams, with potential applications in neutron and photon beam profiling.

Contribution

The paper presents a novel vibrating wire method that enhances measurement sensitivity by using frequency shifts to detect particle interactions, improving beam halo and weak beam diagnostics.

Findings

High sensitivity to temperature and particle flux changes.

Effective for beam halo and weak beam detection.

Applicable to neutron and photon beam profiling.

Abstract

A new approach to the technique of scanning by wires is developed. Novelty of the method is that the wire heating quantity is used as a source of information about the number of interacting particles. To increase the accuracy and sensitivity of measurements the wire heating measurement is regenerated as a change of wire natural oscillations frequency. By the rigid fixing of the wire ends on the base an unprecedented sensitivity of the frequency to the temperature and to the corresponding flux of colliding particles. The range of used frequencies (tens of kHz) and speed of processes of heat transfer limit the speed characteristics of proposed scanning method, however, the high sensitivity make it a perspective one for investigation of beam halo and weak beam scanning. Traditional beam profile monitors generally focus on the beam core and loose sensitivity in the halo region where a large dynamic range of detection is necessary. The scanning by a vibrating wire can be also successfully used in profiling and detecting of neutron and photon beams.