RHIC Beam Energy Scan Operation with Electron Cooling in 2020
semanticscholar(2021)
摘要
RHIC provided Au+Au collisions at beam energies of 5.75 and 4.59 GeV/nucleon for the physics program in 2020 as part of the Beam Energy Scan II experiment. The machine configuration and operational experience at these energies are presented in this report with emphasis on their unique features which include but are not limited to the addition of a second RF system to enable large longitudinal acceptance and to reduce the intrabeam scattering rate at 5.75 GeV/nucleon, the exploration of the tune space for better performance, the use of lower frequency cavities for alleviating space charge effects, and the world-first operation of cooling on colliding beams with an RF-accelerated bunched electron beam.
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