PL EN


Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
Czasopismo
2005 | 3 | 4 | 564-580
Tytuł artykułu

Modelling of a nitrogen x-ray laser pumped by capillary discharge

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
We performed computer modelling of a fast electrical discharge in a nitrogen-filled alumina capillary in order to discover discharge system parameters that may lead to efficient recombination pumping of soft X-ray laser with active medium created by H-like nitrogen ions. The space-time dependences of pinch plasma quantities were found by means of a one-dimensional MHD code. Time dependences of populations of all ionisation states and populations of selected energy levels of lithium-, helium- and hydrogen-like nitrogen ions were evaluated using the FLY code as a post-processor. The population inversion was found at the quantum transition corresponding to the Balmer α-line of N6+ ions and the resulting gain factor was evaluated for different capillary radii, initial pressure, electric current peaks and periods. A gain factor of 1 cm−1 spanning the time interval of 1 ns was found for an optimised arrangement with capillary radius 1.5 mm, peak current 50 kA, quarter period 40 ns and filling gas pressure 0.5 kPa. It is pointed out that even higher values of the gain factor may be achieved with thinner capillaries and shorter current pulses, e.g. a gain factor of 6 cm−1 is achieved if the capillary radius is 0.5 mm, peak current 56 kA, quarter period 15 ns, and filling nitrogen pressure 3.9 kPa.
Wydawca

Czasopismo
Rocznik
Tom
3
Numer
4
Strony
564-580
Opis fizyczny
Daty
wydano
2005-12-01
online
2005-12-01
Twórcy
autor
  • Institute of Plasma Physics, The Academy of Sciences of the Czech Republic, Za Slovankou 3, 182 00, Prague 8, Czech Republic, vrba@ipp.cas.cz
  • The Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19, Prague 1, Czech Republic
  • Institute of Theoretical and Experimental Physics, Bolshaya Cheremushkinskaya 25, 117218, Moscow, Russia
  • Institute of Theoretical and Experimental Physics, Bolshaya Cheremushkinskaya 25, 117218, Moscow, Russia
Bibliografia
  • [1] J.J. Rocca: “Table-top soft X-ray lasers”, Review of Scientific Instruments, Vol. 70, (1999), pp. 3799–3822. http://dx.doi.org/10.1063/1.1150041[Crossref]
  • [2] K. Lee, J.H. Kim and D. Kim: “Z-Scaling for the H-like Recombination Laser in the Capillary Discharge”, In: J.J. Rocca, J. Dunn and S. Suckewer (Eds.).X-Ray Lasers. International Conference on X-Ray Lasers, Aspen (USA) 8th ed., AIP C641, 2002, pp. 97–101.
  • [3] R. Dussart, D. Hong, S. Götze, W. Rosenfeld, J. Pons, R. Viladrosa, C. Cachoncinlle, C. Fleurier and J-M. Pouvesle: “Time-resolved spatial distribution of an ablative capillary discharge obtained with a pinhole camera”, J. Phys. D. Appl. Phys., Vol. 33, (2000), pp. 1837–1842. http://dx.doi.org/10.1088/0022-3727/33/15/313[Crossref]
  • [4] M. Vrbova, P. Vrba, A. Jancarek, N.A. Bobrova, P.V. Sasorov, J. Limpouch, L. Pina, L. Nadvornikova and A. Fojtik: “EUV Emission Spectra and Gain in Polyacetal Capillary Discharge”, In: J.J. Rocca, J. Dunn and S. Suckewer (Eds.):X-Ray Lasers. International Conference on X-Ray Lasers, Aspen (USA), 8th ed., AIP C641, 2002, pp. 139–144.
  • [5] J.J. MacFarlane: “IONMIX-a code for computing the equation of state and radiative properties of LTE and non-LTE plasmas”, Computer Physics Communication, Vol. 56, (1989), pp. 259–278. http://dx.doi.org/10.1016/0010-4655(89)90023-4[Crossref]
  • [6] N.A. Bobrova, S.V. Bulanov, T.L. Razinkova and P.V. Sasorov: “Dynamics of a Pinch Discharge in Capillarics”, Plasma Physics Reports, Vol. 22, (1996), pp. 387–402.
  • [7] R.W. Lee and J.T. Larsen: “A time-dependent model for plasma spectroscopy of K-shell emitters”, Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 56, (1996), pp. 535–556. http://dx.doi.org/10.1016/0022-4073(96)00081-7[Crossref]
  • [8] R.C. Elton:X-Ray Laser, Academic Press, New York, 1990.
  • [9] V.S. Imshennik and N.A. Bobrova:Dynamics of Collisional Plasma, Energoatomizdat, Moscow, 1977 (in Russian).
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_BF02475613
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.