IBIC2026 - 15th International Beam Instrumentation Conference

Development and performance evaluation of a new BPM data acquisition system for J-PARC MR

WEP017

2 Sept 2026, 16:00

2h

Ballroom C (Whistler Conference Centre)

Poster Presentation MC07: Data Acquisition and Processing Platforms Wednesday Poster Session 3

Speaker

Kenichirou Satou (High Energy Accelerator Research Organization)

Description

J-PARC MR has achieved its initial goal of 750 kW beam delivery and is upgrading equipment toward the next target of 1.3 MW. The Beam Position Monitor (BPM) system comprises 186 sensors and associated data-processing units, and precise determination of accelerator optics is required. We aim to improve Closed Orbit Distortion (COD) and bunch-by-bunch (BxB) position measurements to better than one-third of the current system’s uncertainty, with target precisions of 10 μm for COD and 100 μm for BxB.
To meet these targets, we have developed a new data acquisition (DAQ) system consisting of a front-end attenuator board (ATT), ADC boards, and data storage. The system is scheduled for installation during this summer’s long maintenance period; pre-installation calibration is currently underway. We are considering implementing frequency-dependent calibration and estimating its potential impact on BxB measurement accuracy.
This presentation will report the DAQ design, present the calibration methodology, evaluate the results of DAQ bench tests, and discuss the expected BPM performance.