Develop monitors for MW-power proton beam at J-PARC extraction beamline for neutrino experiments

TL;DR

This paper discusses the development and challenges of non-destructive beam monitors for high-power proton beams at J-PARC, crucial for neutrino experiments and ensuring beam quality and safety.

Contribution

It introduces new non-destructive beam monitoring techniques using fluorescence and optical fibers for high-power proton beams at J-PARC.

Findings

Successful implementation of fluorescence monitors

Effective optical fiber beam loss detection

Identified challenges in high-power beam monitoring

Abstract

Intense and well-characterized neutrino sources, coupled with large and high-performance detectors, are essential for elucidating the unknowns in leptonic mixing through neutrino oscillation measurements. The J-PARC accelerator and neutrino extraction beamline have recently undergone upgrades, successfully delivering an 800-kW beam. We discuss the development, recent findings, and outstanding challenges associated with a non-destructive beam-induced fluorescence monitor and optical-fiber-based beam loss monitors.