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Description
The barrier bucket antiproton accumulation scheme is investigated for the RESR ring, which is proposed to be constructed using the existing COSY ring magnets. In the baseline design, RESR serves as an intermediate storage and accumulation ring for antiprotons precooled in the Collector Ring (CR) by stochastic cooling. The main objective is the accumulation of up to 10¹¹ antiprotons within a few hours, enabling high-intensity antiproton beams for further experiments in the (High Energy Storage Ring) (HESR).
Since the magnetic aperture of the COSY ring components is too small to accommodate conventional longitudinal stochastic stacking, the application of the barrier bucket accumulation method combined with stochastic cooling is proposed as an alternative. In this scheme, batches of 10⁸ stochastically precooled antiprotons, delivered by the CR every 10 seconds at a beam energy of 3 GeV, are accumulated in the longitudinal phase space using RF barrier buckets. After sufficient accumulation, the stored antiprotons are transferred to the HESR for subsequent acceleration or deceleration according to experimental requirements. This approach allows the reuse of existing accelerator components, reducing overall construction costs while maintaining the capability for efficient high-intensity antiproton accumulation. The feasibility and expected performance of the proposed barrier bucket accumulation scheme are discussed based on numerical simulations and beam dynamics considerations.
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