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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 17, Iss. 6 — Jun. 1, 2000
  • pp: 1084–1092

Modeling picosecond-laser-driven neonlike titanium x-ray laser experiments

Joseph Nilsen, Yuelin Li, and James Dunn  »View Author Affiliations


JOSA B, Vol. 17, Issue 6, pp. 1084-1092 (2000)
http://dx.doi.org/10.1364/JOSAB.17.001084


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Abstract

The technique of first using a nanosecond pulse to preform and ionize the plasma and then using a picosecond pulse to heat the plasma enables low-Z neonlike and nickellike ions to lase, driven by small lasers, with only 10 J of energy. Recent experiments at the Compact Multipulse Terawatt laser facility at Lawrence Livermore National Laboratory have demonstrated lasing in neonlike titanium by irradiation of 1-cm-long slab targets of titanium with a 4.8-J, 800-ps prepulse that is followed 1.6 ns later by a 6-J, 1-ps drive pulse. In this study we model the neonlike titanium x-ray laser under those experimental conditions. The LASNEX code is used to calculate the hydrodynamic evolution of the plasma and to provide the temperatures and densities to the XRASER code, which then performs the kinetics calculations to determine the gain. The temporal and spatial evolution of the plasma is studied both with and without radiation transport included for the 3d and the 3s2p neonlike titanium resonance lines. Large regions with gains greater than 80 cm-1 are predicted for the 3p 1S03s 1P1 neonlike titanium laser line at 32.6 nm. The gain is shown to be quasi-steady-state over these time scales with regard to the equilibration of the excited-state populations. The transient nature of the gain is shown to be due to the ionization balance in the plasma. Given the large gain and the large gradients in these plasmas, we calculate x-ray laser propagation, including refraction effects, to understand which regions have the right combination of high gain and low density gradients for an optical contribution to the x-ray laser output. Calculations with different delays between the long and the short pulses and with different durations for the short pulse are presented to provide a better insight into optimization of the laser output. High gain is also predicted and observed for the self-photopumped 3d 1P13p 1P1 laser line at 30.1 nm in neonlike titanium, and calculations are presented to help understand this lasing mechanism.

© 2000 Optical Society of America

OCIS Codes
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers
(340.0340) X-ray optics : X-ray optics

Citation
Joseph Nilsen, Yuelin Li, and James Dunn, "Modeling picosecond-laser-driven neonlike titanium x-ray laser experiments," J. Opt. Soc. Am. B 17, 1084-1092 (2000)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-17-6-1084


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References

  1. J. Nilsen, B. J. MacGowan, L. B. Da Silva, and J. C. Moreno, “Prepulse technique for producing low-Z Ne-like x-ray lasers,” Phys. Rev. A 48, 4682–4685 (1993). [CrossRef] [PubMed]
  2. J. C. Moreno, J. Nilsen, and L. B. Da Silva, “Traveling wave excitation and amplification of neon-like germanium 3p–3s transitions,” Opt. Commun. 110, 585–589 (1994). [CrossRef]
  3. J. Nilsen and J. C. Moreno, “Nearly monochromatic lasing at 182 Å in neon-like selenium,” Phys. Rev. Lett. 74, 3376–3379 (1995). [CrossRef] [PubMed]
  4. E. E. Fill, Y. L. Li, D. Schlögl, J. Steingruber, and J. Nilsen, “Sensitivity of lasing in neon-like zinc at 21.2 nm to the use of the prepulse technique,” Opt. Lett. 20, 374–376 (1995). [CrossRef]
  5. J. Nilsen and J. C. Moreno, “Lasing at 7.9 nm in nickellike neodymium,” Opt. Lett. 20, 1386–1388 (1995). [CrossRef] [PubMed]
  6. H. Daido, Y. Kato, K. Murai, S. Ninomiya, R. Kodama, G. Yuan, Y. Oshikane, M. Takagi, H. Takabe, and F. Koike, “Efficient soft x-ray lasing at 6 to 8 nm with nickel-like lanthanide ions,” Phys. Rev. Lett. 75, 1074–1077 (1995). [CrossRef] [PubMed]
  7. J. Zhang, A. G. MacPhee, J. Nilsen, J. Lin, T. W. Barbee, Jr., C. Danson, M. H. Key, C. L. S. Lewis, D. Neely, R. M. N. O’Rourke, G. J. Pert, R. Smith, G. J. Tallents, J. S. Wark, and E. Wolfrum, “Demonstration of saturation in a Ni-like Ag x-ray laser at 14 nm,” Phys. Rev. Lett. 78, 3856–3859 (1997). [CrossRef]
  8. B. Rus, A. Carillon, P. Dhez, P. Jaegle, G. Jamelot, A. Klisnick, M. Nantel, and P. Zeitoun, “Efficient, high-brightness soft-x-ray laser at 21.2 nm,” Phys. Rev. A 55, 3858–3873 (1997). [CrossRef]
  9. R. Tommasini, F. Löwenthal, and J. E. Balmer, “Saturation in a Ni-like Pd soft-x-ray laser at 14.7 nm,” Phys. Rev. A 59, 1577–1581 (1999). [CrossRef]
  10. A. V. Vinogradov, I. I. Sobel’man, and E. A. Yukov, “Population inversion of transitions in neon-like ions,” Sov. J. Quantum Electron. 7, 32–35 (1977). [CrossRef]
  11. P. V. Nickles, V. N. Shlyaptsev, M. Kalachnikov, M. Schnürer, I. Will, and W. Sandner, “Short pulse x-ray laser at 32.6 nm based on transient gain in Ne-like titanium,” Phys. Rev. Lett. 78, 2748–2751 (1997). [CrossRef]
  12. J. Dunn, A. L. Osterheld, R. Shepherd, W. E. White, V. N. Shlyaptsev, and R. E. Stewart, “Demonstration of x-ray amplification in transient gain nickel-like palladium scheme,” Phys. Rev. Lett. 80, 2825–2828 (1998). [CrossRef]
  13. J. Dunn, J. Nilsen, A. L. Osterheld, Y. L. Li, and V. N. Shlyaptsev, “Demonstration of transient gain x-ray lasers near 20 nm for nickellike yttrium, zirconium, niobium, and molybdenum,” Opt. Lett. 24, 101–103 (1999). [CrossRef]
  14. Y. L. Li, J. Nilsen, J. Dunn, A. L. Osterheld, A. Ryabtsev, and S. Churilov, “Wavelengths of the Ni-like 4d 1S0→4p 1P1 x-ray laser line,” Phys. Rev. A 58, R2668–R2671 (1998). [CrossRef]
  15. J. Nilsen, J. Dunn, A. L. Osterheld, and Y. L. Li, “Lasing on the self-photopumped nickel-like 4f1P1→4d1P1 x-ray transition,” Phys. Rev. A 60, R2677–R2680 (1999). [CrossRef]
  16. J. Nilsen, “Lasing on the 3d→3p neonlike x-ray laser transitions driven by a self-photo-pumping mechanism,” Phys. Rev. A 53, 4539–4546 (1996). [CrossRef] [PubMed]
  17. J. Nilsen, “Analysis of a picosecond-laser-driven Ne-like Ti x-ray laser,” Phys. Rev. A 55, 3271–3274 (1997). [CrossRef]
  18. G. B. Zimmerman and W. L. Kruer, “Numerical simulation of laser-initiated fusion,” Comments Plasma Phys. Control. Fusion 2, 51–61 (1975).
  19. J. Nilsen, “Radiative-hydro modeling and atomic data bases,” in AIP Conference Proceedings 168—Atomic Processes in Plasmas, Allan Hauer and A. L. Merts, eds. (American Institute of Physics, New York, 1988), pp. 51–58.
  20. M. P. Kalachnikov, P. V. Nickles, M. Schnürer, W. Sandner, V. N. Shlyaptsev, C. Danson, D. Neely, E. Wolfrum, J. Zhang, A. Behjat, A. Demir, G. J. Tallents, P. J. Warwick, and C. L. S. Lewis, “Saturated operation of a transient collisional x-ray laser,” Phys. Rev. A 57, 4778–4783 (1998). [CrossRef]
  21. Yu. V. Afanas’ev and V. N. Shlyaptsev, “Formation of a population inversion of transitions in Ne-like ions in steady state and transient plasmas,” Sov. J. Quantum Electron. 19, 1606–1612 (1989). [CrossRef]
  22. A. L. Osterheld, V. N. Shlyaptsev, J. Dunn, J. J. Rocca, M. C. Marconi, C. H. Moreno, J. J. Gonzales, M. Frati, P. V. Nickles, M. Kalachnikov, and W. Sandner, “Modeling of laser produced plasma and Z-pinch x-ray lasers,” in IOP Conference Series 159—X-ray Lasers 1998, Y. Kato, H. Takuma, and H. Daido, eds. (Institute of Physics, Bristol, UK, 1999), pp. 353–362.

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