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The low energy RHIC electron cooler (LEReC) currently under commissioning at BNL is going to be the first nonmagnetized bunched electron cooler (EC). For successful cooling LEReC requires that the electrons in the cooling section (CS) have small angles with respect to co-propagating ions. Since there is no strong magnetic field in the CS, the effects of ions on both the trajectory and focusing of the e-bunches is critical. In this paper we consider the ion beam kick on the electron bunches and derive requirements to the respective alignment of electron and ion beams in nonmagnetized coolers.

Effect of beam-beam kick on electron beam quality in first bunched electron cooler