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

Study of operation above half-integer random resonance in the J-PARC RCS

WEPS003
4 Jun 2025, 16:00
2h
Exhibiton Hall A _Magpie (TWTC)

Exhibiton Hall A _Magpie

TWTC

Poster Presentation MC5.D01 Beam Optics Lattices, Correction Schemes, Transport Wednesday Poster Session

Speaker

Kota Okabe (Japan Atomic Energy Agency)

Description

In the 3-GeV Rapid Cycling Synchrotron (RCS) of the Japan Proton Accelerator Research Complex (J-PARC), the beam power ramp-up aiming to surpass the design of 1 MW enhances the space charge effect. It pushes the beam toward the structure resonance. To mitigate the beam loss, the operating point is required to be apart from the structure resonance as the beam power ramp-up. However, large beam loss was observed when the operating point was set near the half-integer resonance. Thus, the maximum beam power of the RCS is currently limited so that the beam does not overlap the structure resonance or half-integer random resonance. To address this issue and achieve the beam power ramp-up, we experimentally studied the half-integer resonance compensation using trim quadrupole magnets. In addition, detailed numerical simulations were performed to develop a better understanding. The experimental and numerical results of the operation above half-integer random resonance are presented.

Region represented Asia
Paper preparation format LaTeX

Author

Kunihiro Kojima (High Energy Accelerator Research Organization)

Co-authors

Hiroyuki Harada (Japan Proton Accelerator Research Complex) Kota Okabe (Japan Atomic Energy Agency) Motoki Chimura (Japan Proton Accelerator Research Complex) Pranab Saha (Japan Proton Accelerator Research Complex)

Presentation materials

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