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The subject of emittance growth resulting from noncompensated chromaticity in single pass linac focusing systems was exhaustively studied in the era of linear colliders decades ago; see, for example, classical treatment in Refs. [1–4], and references therein. Effects described in these papers are fully applicable to energy recovery linacs with noncompensated chromaticity, e.g., a case presented in this paper. I suggest to use a strongly chromatic lattice to improve the beam’s stability in energy recovery linacs (ERLs). Recently, I realized, that, naturally, such lattices would exhibit a very high sensitivity to orbital errors—the effect described in details in Refs. [1–4]. Such errors could, in turn, significantly increase the beam’s emittance. Hence, this Erratum will address this shortcoming of this paper. A simple case illustrating the importance of this shortcoming can be presented in a very simple form [5] using notations used in this paper. The orbit distortion caused by random field errors can be described as follows:

Erratum: Chromaticity of the lattice and beam stability in energy recovery linacs [Phys. Rev. ST Accel. Beams15, 074401 (2012)]