Abstract
The undulator radiation of positrons channeled in a crystalline undulator with sections (CUS) is investigated theoretically taking into account the effect of dielectric polarization of the crystalline medium. The configuration of CUS preserves planar channeling of positrons with a given energy. An analytical expression is obtained for the spectral distribution of the number of radiated photons. The features of this spectrum are presented. As expected, such a modification of the crystalline undulator results in the gain of radiation owing to the constructive interference of the radiation fields formed in separate sections. The optimal parameters of the CUS are found. Such micro-emitters will find wide practical applications because they generate directional beams of both hard and soft photons.
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REFERENCES
Ginzburg, V. L., Izv. Akad. Nauk SSSR, Ser. Fiz., 1947, vol. 11, no.2. p. 165 [in Russian].
Motz, H., J. Appl. Phys., 1951, vol. 22, p. 527.
Motz, H., Thon, W., and Whitehurst, R.N., J. Appl. Phys., 1953, vol. 24, p. 826.
Korkhmazyan, N.A., Izv. AN Arm. SSR, Physics, 1970, vol. 5, p. 287; p. 418 [in Russian].
Alikhanyan, A.I., Esin, S.K., Ispiryan, K.A., et al., JETP Letters, 1972, vol. 15, p. 98.
Gevorgyan, L.A. and Korkhmazyan, N.A., JETP, 1979, vol. 49, no 4, p. 622.
Lindhard, J., Physcis Uspekhi, 1969, vol. 99, no. 2, p. 249.
Kumakhov, M.A., Phys. Lett. A, 1976, vol. 57, p. 17.
Kumakhov., M.A., Dokladi Akad. Nauk SSSR, 1976, vol. 230, p. 1077 [in Russian].
Kumakhov, M.A., JETP, 1977, vol. 45, no 4, p. 781.
Miroshnichenko, I.I., Murray, J.J., Avakyan, R.O., and Figut, T.Kh., JETP Letters, 1979, vol. 29, p. 722; JETP, 1982, vol. 55, p. 1052.
Gevorgian, L.A. and Hovsepyan, L.A., J. Contemp. Phys., 2007, vol. 42, p. 87.
Avakian, R., Gevorgian, L., and Hovsepyan, L., NIM B, 2013, vol. 309, p. 20.
Gevorgian, K.L. and Gevorgian, L.A., J. Contemp. Phys., 2019, vol. 54, p. 126.
Bazylev, V.A. and Zhevago, N.K., Radiation of fast particles in a medium and in external fields (Izlucheniye bystrykh chastits v srede i vo vneshnikh polyakh), Moscow: Nauka, 1987 [in Russian].
Kaplin, V.V., Plotnikov, S.V., and Vorobev, S.A., Zh. Tekh. Fiz., 1980, vol. 50, p. 1079.
Baryshevsky, V.G., Dubovskaya, I.Ya., and Grubich, A.O., Phys. Lett. A, 1980, vol. 77, p. 61.
Baryshevsky, V.G. and Tikhomirov, V.V., NIM B, 2013, vol. 309, p. 30.
Ikezi, H., Lin-Liu, Y., and Ohkawa, T., Phys. Rev. B, 1984, vol. 30, p. 1567.
Mikkelsen, U. and Uggerhoj, E., NIM B, 2000, vol. 160, p. 435.
Belucci, S., Bini, S., Biryukov, V.M., et al., Phys. Rev. Lett., 2003, vol. 90, p. 034801.
Baranov, V.T. et al., JETP Lett., 2005, vol. 82, p. 562.
Avakian, R.O., Avetyan, K.T., Ispirian, K.A., and Melikyan, E.G., NIM A, 2002, vol. 492, p. 11.
Backe, H. et al., Nuovo Cim. C, 2011, vol. 34, p. 157.
Backe, H. et al., NIM B, 2013, vol. 309, p. 37.
Korol, A.A., Solovev, A.V., and Greiner, W., J. Phys. G., 1998, vol. 24, p. L45.
Ter-Mikaelian, M.L., High Energy Electromagnetic Processes in Condensed Media, New York: Wiley-Interscience, 1972.
Gevorgian, L.A., Avakyan, R.O., Ispirian, K.A., and Ispirian, R.K., JETP Letters, 1998, vol. 68, no. 6, p. 467.
Gevorgian, L.A., Avakyan, R.O., Ispirian, K.A., and Ispirian, R.K., NIM B, 2001, vol. 173, p. 112.
Vinokurov, N.A. and Skrinsky, A.N., Preprint 77-59 (Novosibirsk INP SB RAS, 1977).
Avakian, R.O., Gevorgian, L.A., Ispirian, K.A., and Shamamian, A.H., NIM B, 2005, vol. 227, p. 104.
Epp, V., Janz, J., and Kaplin, V., NIM B, 2016, vol. 388, p. 24.
Vorobiev, S., Kaplin, V., and Rozum, E., Patent SU 876044 A1, 1982.
Epp, V., Janz, J., and Kaplin, V., NIM B, 2017, vol. 402, p. 98.
Jackson, J.D., Classical Electrodynamics, 3rd ed., New York: Wiley, 1999.
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Translated by V. Musakhanyan
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Gevorgyan, H.L., Gevorgian, L.A. & Shamamian, A.H. Gain and Features of Radiation of Positrons in a Crystalline Undulator with Sections. J. Contemp. Phys. 56, 159–168 (2021). https://doi.org/10.3103/S1068337221030117
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DOI: https://doi.org/10.3103/S1068337221030117