1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

Challenges and solutions for high-intensity beam operations in the J-PARC linac

TUPS042
3 Jun 2025, 16:00
2h
Exhibiton Hall A _Salmon (TWTC)

Exhibiton Hall A _Salmon

TWTC

Poster Presentation MC4.A08 Linear Accelerators Tuesday Poster Session

Speaker

Yong Liu (High Energy Accelerator Research Organization)

Description

The Japan Proton Accelerator Research Complex (J-PARC) has achieved stable 1 MW operation test on its neutron target and is advancing toward higher power levels of 1.5 MW and 2.5 MW to support high-power MR operations and a second target station. This progression presents challenges, including increased intra-beam stripping (IBSt) of H⁻ ions, chop leakage from higher beam currents and emittance, low-energy beam loss due to halo formation, frontend fluctuations affecting beam transmission, and RF phase and amplitude instabilities. To address these issues, a redesigned lattice mitigates IBSt, a new MEBT1 improves chopping and collimation, and machine learning-based compensation schemes manage frontend and RF fluctuations. Additionally, 3D matching schemes enhance beam quality, validated through benchmarked longitudinal measurements. Results from studies at 50 mA and 60 mA beam currents demonstrate significant progress in overcoming these challenges.

Region represented Asia
Paper preparation format LaTeX

Author

Yong Liu (High Energy Accelerator Research Organization)

Presentation materials

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