Speaker
Description
The J-PARC Main Ring (MR) is a high-intensity proton synchrotron, which accelerates protons from 3 GeV to 30 GeV.
In addition to protons, we are considering accelerating heavy ions to GeV/u energies in the MR as part of the J-PARC heavy-ion program (J-PARC HI).
The heavy ions will be injected from the new heavy-ion injector into the J-PARC Rapid Cycling Synchrotron (RCS) and delivered to the MR.
As the first stage of the program, Au ions are considered the ion species to accelerate.
A full stripping beam of Au ions ($^{197}$Au$^{79}$ ) with an energy of 500 MeV/u is injected from the RCS to the MR. Au ions are accelerated up to 11.5 GeV/u and delivered to the hadron experimental facility.
Since the change in revolution frequency during acceleration of Au ions is larger than that for protons, additional cavities dedicated to ion acceleration or modifications to the existing RF cavity will be needed to cover a wider frequency range.
To estimate the RF system requirements for accelerating Au ions in the MR, we conducted a longitudinal beam dynamics simulation.
In this presentation, we present the simulation results with various harmonic numbers and acceleration times.
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