IBIC2026 - 15th International Beam Instrumentation Conference

A study of straw detector saturation effects with a 440 GeV bunched proton beam at the HiRadMat facility at CERN

MOP014

31 Aug 2026, 16:40

2h

Ballroom C (Whistler Conference Centre)

Poster Presentation MC04: Transverse Profile and Emittance Monitors Monday Poster Session 1

Speaker

Robert Larsen (European Organization for Nuclear Research)

Description

Part of the current effort to upgrade the intensity of CERN beamlines in the North Experimental Area is examining technologies for their potential use in a radiation hard transverse beam profile monitors. One such technique is to use a straw detector, potentially operated at a voltage where charge amplification does not occur. We show results from an experiment with a 5 mm diameter thin walled straw detector using a gas mixture of 50/50 Ar/CO2 at atmospheric pressure carried out at the HiRadMat (High-Radiation to Materials) facility at CERN. The experiment was carried out with a 440 GeV bunched proton beam at intensities up to 2e11 particles per bunch. A unique measurement of the time-scale of the straw signal saturation is presented, made possible by the SPS sending two bunches with a delay of up to 8 microseconds between them.