LINAC2026 - 33rd Linear Accelerator Conference

Beam Loss Measurements with Neutron and Ionization Chamber Monitors during ESS Beam Commissioning to the Tuning Beam Dump

MOPO066

17 Aug 2026, 16:00

2h

1F Exhibition Hall (Daejeon Convention Center)

Poster Presentation MC4.A01: Beam diagnostics MOPO - Poster Session

Speaker

Hooman Hassanzadegan (European Spallation Source)

Description

The European Spallation Source (ESS) employs 266 ionization chamber beam loss monitors (icBLMs) and 82 neutron beam loss monitors (nBLMs). These detectors provide detailed information on beam loss distribution along the ~600 m ESS linac and play a critical role in machine protection. During the second round of beam commissioning to the Tuning Beam Dump in spring 2026, systematic tests were performed with both BLM systems to evaluate their performance, including operational challenges and limitations. The stability of the systems and the readout signals was checked in low- and high-loss scenarios and under different environmental conditions. This paper provides a brief overview of the BLM system design and machine protection functions, followed by recent beam loss measurement results obtained with beam.