Speaker
Description
Achieving sustainable beam operation in high-power proton/hadron accelerators requires careful control and minimization of halo-particle-induced beam loss. This necessitates a clear understanding of the halo-particle distribution. While state-of-the-art instruments can achieve a dynamic range of ~10⁶ using counting readout schemes, a novel fluorescence wire scanner combined with a conventional metal wire has recently been proposed and demonstrated at the China Spallation Neutron Source (CSNS). This new approach has achieved a sensitivity at the 10³ ppp level and a record dynamic range of over 10⁸, as demonstrated at the CSNS H⁻ LINAC. A 100×1×0.15 mm³ fluorescence wire has been prepared, demonstrating excellent light yield and radiation hardness. This monitor could potentially be implemented for halo diagnostics at high-intensity frontier accelerators as well as for weak particle beams.