BNL, Upton, New York, USA
An electron cooling of ion beams employing a high-energy approach with rf-accelerated electron bunches was recently implemented at BNL using LEReC accelerator. Following successful cooling commissioning in 2019, it was used to cool ion beams in both collider rings with ion beams in collision. Electron cooler LEReC successfully operated for the RHIC physics program in 2020 and 2021 and was essential in achieving the required luminosity goals. Apart from its use in RHIC operations, LEReC is being used to study various aspects of electron cooling physics using short electron bunches. This presentation will summarize experience with electron cooling of colliding ion beams in RHIC, as well as ongoing studies.
