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TY - UNPB AU - Benson, S.V. AU - Seryi, A. AU - Stupakov, G. AU - Tennant, C. AU - Willeke, F.J. AU - Zhang, Y. ED - Meseck, Atoosa ED - McAteer, Meghan ED - Schaa, Volker R.W. ED - V\xF6lker, Jens TI - The Use of ERLs to Cool High Energy Ions in Electron-Ion Colliders J2 - Proc. of ERL2019, Berlin, Germany, 15-20 September 2019 CY - Berlin, Germany T2 - ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs T3 - 63 LA - english AB - Future electron-ion colliders collide high-intensity ion beams with high current electron beams. The electron beams take advantage of synchrotron radiation to damp emittances but the ion beams must be cooled via a beam cooling mechanism, including electron cooling. The ion energies are typically a few hundreds of GeV per nucleon, for an electron-ion collider envisioned to be built in US. At this energy, DC coolers powered by electrostatic accelerators, are not useful. The ERL, in principle, can provide the high current and brightness to cool these high-brightness ion beams. The beam quality requirements are much different from previous ERLs designs used for FELs. The cooling bunch must be much longer than in an FEL and the relative energy spread must be very small. Incoherent cooling can be enhanced with magnetized beams, but the magnetization must be maintained throughout the ERL. An alternate cooling mechanism, the so-called Coherent Electron Cooling, is, in principle, stronger and can be done with non-magnetized beams. We will present several applications of ERLs to high energy electron cooling and describe the technical challenges that must be overcome to build such an ERL. PB - JACoW Publishing CP - Geneva, Switzerland ER -