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Calculation of beam divergence of pulsed electron-beam-discharge lasers (EBL)

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Abstract

The beam divergence in electron-beam-discharge lasers is determined by the refraction of the radiation by the gradients of the electron and gas densities. At short pump pulse durations (τ ⪝ 1 μsec) and, accordingly, at high charged-particle densities (ne 1014 cm-3) the divergence is due to the inhomogeneity of the ionization of the active medium. At long durations (τ > 10 μsec) the divergence is determined by the refraction of the radiation by the gas-density gradients produced by the hydrodynamic motion of the active medium during the course of the pump pulse. By using unstable telescopic resonators with dimensions smaller than the energy-input region, it is possible to considerably increase the energy of the radiation whose divergence is due to refraction.

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Literature Cited

  1. 1.

    Yu. A. Anan'ev, “Unstable resonators and their use. Review,” Kvantovaya Elektron. (Moscow),6, 3–33 (1971).

  2. 2.

    V. L. Ginzburg, Propagation of Electromagnetic Waves in a Plasma, Pergamon (1964).

  3. 3.

    V. A. Danilychev, O. M. Kerimov, and I. B. Kovsh, “High power lasers and laser plasma,” Tr. Fiz. Inst. Akad. Nauk,85, 49 (1976).

  4. 4.

    Yu. G. Davydov and O. M. Belotserkovskii, “Nonstationary method of ‘large particles’ for gasdynamic calculations,” Zh. Vychisl. Mat. Mat. Fiz.,11, 182 (1971).

  5. 5.

    E. P. Glotov, V. A. Danilychev, A. E. Kruglyi, V. V. Pustovalov, A. M. Soroka, and N. V. Cheburkin, “Effect of gasdynamic motion of the active medium during the pump pulse on the beam divergence of electron-beam-controlled lasers,” Kvantovaya Elektron. (Moscow),6., 1924–1932 (1978).

  6. 6.

    Yu. A. Anan'ev, A. V. Koval'chuk, V. A. Trusov, and V. E. Sherstobitov, “Procedure for calculation of the efficiency of a laser with an unstable resonator,” Kvantovaya Elektron. (Moscow),1, 1201–1211 (1974).

  7. 7.

    L. Pages, E. Bertel, H. Joffre, and L. Sklaventis, “Energy loss, Range and bremsstrahlung yield for 10-keV to 100-MeV electrons in various elements and chemical compounds,” Atomic Data,4, 1 (1972).

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Additional information

Translated from Trudy Ordena Lenina Fizicheskogo Instituta im. P. N. Lebedeva, Vol. 116, pp. 181–187, 1980.

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Glotov, E.P., Danilychev, V.A., Pustovalov, V.V. et al. Calculation of beam divergence of pulsed electron-beam-discharge lasers (EBL). J Russ Laser Res 2, 57–63 (1981). https://doi.org/10.1007/BF01120841

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Keywords

  • Radiation
  • Refraction
  • Pulse Duration
  • Active Medium
  • Pump Pulse