Erratum to: Improved Generation of Higher Harmonics and Suppression of the Lowest Harmonics in an X-Ray FEL with a Two-Frequency Undulator

Аннотация

The authors apologize for the misprints in the article “Improved Generation of Higher Harmonics and Suppression of the Lowest Harmonics in an X-Ray FEL with a Two-Frequency Undulator” by K. Zhukovsky in Moscow University Physics Bulletin, 2018, Vol. 73, No. 5, pp. 462–469, DOI: https://doi.org/10.3103/S0027134918050193, and communicate the following corrected formula (5) for the Bessel coefficients f_n of the two-frequency undulator: