# A non-invasive ultra-thin luminophore foil detector system for secondary beam monitoring

## TL;DR

This paper introduces a non-invasive, ultra-thin luminophore foil detector system utilizing CCD imaging to accurately monitor high-intensity secondary beams in particle physics and materials science, enhancing beam characterization.

## Contribution

The paper presents a novel, non-invasive luminophore foil detector system based on CCD imaging, specifically designed for high-intensity beam monitoring in particle physics experiments.

## Key findings

- Successfully quantified beam characteristics of a surface muon beam at PSI.
- Demonstrated potential application for future high-intensity muon beams.
- Provided detailed overview of foil production and intrinsic properties.

## Abstract

High-intensity secondary beams play a vital role in today's particle physics and materials science research and require suitable detection techniques to adjust beam characteristics to optimally match experimental conditions. To this end we have developed a non-invasive, ultra-thin, CsI(Tl) luminophore foil detector system, based on CCD-imaging. We have used this to quantify the beam characteristics of an intensity-frontier surface muon beam used for next-generation charged lepton-flavour violation (cLFV) search experiments at the Paul Scherrer Institut (PSI) and to assess the possible use for a future High-intensity Muon Beam (HiMB-project), currently under study at PSI. An overview of the production and intrinsic characteristics of such foils is given and their application in a high-intensity beam environment.