Soft-x-ray amplification in a laser-produced strontium plasma

C. J. Keane, Dennis L Matthews, M. D. Rosen, T. W. Phillips, B. J. MacGowan, B. L. Whitten, M. Louis-Jacquet, J. L. Bourgade, A. Decoster, S. Jacquemot, D. Naccache, G. Thiell

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Amplification of soft x rays in Sr (Z=38) plasmas produced by second-harmonic laser irradiation of exploding foil targets is studied. Gains of 4.4 and 4.0 cm-1, respectively, have been measured for the 164.1- and 166.5- J=2 to 1 transitions in Ne-like Sr at laser intensities of 1.3×1014 W/cm2. Numerous x-ray and soft-x-ray transitions were identified in order to demonstrate typical spectra from x-ray laser plasmas and infer information regarding the plasma ionization balance. The J=0 to 1 transition at 159.8, analogous to the well-known Se J=0 to 1 line at 182.4, was not definitively observed due to a wavelength overlap with a Na-like Sr line. Two other J=0 to 1 transitions of interest at 84.9 and 133.0 were not observed. Reduced gain on the J=2 to 1 lasing lines was seen for several shots taken at a lower pump laser intensity of 7.0×1013 W/cm2. Possible reasons for this are considered. The results of this work imply the feasibility of a high-output-power cavity geometry Ne-like Sr x-ray laser operating at 164.1 and 166.5.

Original languageEnglish (US)
Pages (from-to)2327-2339
Number of pages13
JournalPhysical Review A
Volume42
Issue number4
DOIs
StatePublished - 1990
Externally publishedYes

Fingerprint

strontium
x ray lasers
lasers
x rays
laser plasmas
shot
lasing
foils
pumps
harmonics
ionization
cavities
irradiation
output
geometry
wavelengths

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

Cite this

Keane, C. J., Matthews, D. L., Rosen, M. D., Phillips, T. W., MacGowan, B. J., Whitten, B. L., ... Thiell, G. (1990). Soft-x-ray amplification in a laser-produced strontium plasma. Physical Review A, 42(4), 2327-2339. https://doi.org/10.1103/PhysRevA.42.2327

Soft-x-ray amplification in a laser-produced strontium plasma. / Keane, C. J.; Matthews, Dennis L; Rosen, M. D.; Phillips, T. W.; MacGowan, B. J.; Whitten, B. L.; Louis-Jacquet, M.; Bourgade, J. L.; Decoster, A.; Jacquemot, S.; Naccache, D.; Thiell, G.

In: Physical Review A, Vol. 42, No. 4, 1990, p. 2327-2339.

Research output: Contribution to journalArticle

Keane, CJ, Matthews, DL, Rosen, MD, Phillips, TW, MacGowan, BJ, Whitten, BL, Louis-Jacquet, M, Bourgade, JL, Decoster, A, Jacquemot, S, Naccache, D & Thiell, G 1990, 'Soft-x-ray amplification in a laser-produced strontium plasma', Physical Review A, vol. 42, no. 4, pp. 2327-2339. https://doi.org/10.1103/PhysRevA.42.2327
Keane CJ, Matthews DL, Rosen MD, Phillips TW, MacGowan BJ, Whitten BL et al. Soft-x-ray amplification in a laser-produced strontium plasma. Physical Review A. 1990;42(4):2327-2339. https://doi.org/10.1103/PhysRevA.42.2327
Keane, C. J. ; Matthews, Dennis L ; Rosen, M. D. ; Phillips, T. W. ; MacGowan, B. J. ; Whitten, B. L. ; Louis-Jacquet, M. ; Bourgade, J. L. ; Decoster, A. ; Jacquemot, S. ; Naccache, D. ; Thiell, G. / Soft-x-ray amplification in a laser-produced strontium plasma. In: Physical Review A. 1990 ; Vol. 42, No. 4. pp. 2327-2339.
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AU - MacGowan, B. J.

AU - Whitten, B. L.

AU - Louis-Jacquet, M.

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AU - Decoster, A.

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AU - Naccache, D.

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N2 - Amplification of soft x rays in Sr (Z=38) plasmas produced by second-harmonic laser irradiation of exploding foil targets is studied. Gains of 4.4 and 4.0 cm-1, respectively, have been measured for the 164.1- and 166.5- J=2 to 1 transitions in Ne-like Sr at laser intensities of 1.3×1014 W/cm2. Numerous x-ray and soft-x-ray transitions were identified in order to demonstrate typical spectra from x-ray laser plasmas and infer information regarding the plasma ionization balance. The J=0 to 1 transition at 159.8, analogous to the well-known Se J=0 to 1 line at 182.4, was not definitively observed due to a wavelength overlap with a Na-like Sr line. Two other J=0 to 1 transitions of interest at 84.9 and 133.0 were not observed. Reduced gain on the J=2 to 1 lasing lines was seen for several shots taken at a lower pump laser intensity of 7.0×1013 W/cm2. Possible reasons for this are considered. The results of this work imply the feasibility of a high-output-power cavity geometry Ne-like Sr x-ray laser operating at 164.1 and 166.5.

AB - Amplification of soft x rays in Sr (Z=38) plasmas produced by second-harmonic laser irradiation of exploding foil targets is studied. Gains of 4.4 and 4.0 cm-1, respectively, have been measured for the 164.1- and 166.5- J=2 to 1 transitions in Ne-like Sr at laser intensities of 1.3×1014 W/cm2. Numerous x-ray and soft-x-ray transitions were identified in order to demonstrate typical spectra from x-ray laser plasmas and infer information regarding the plasma ionization balance. The J=0 to 1 transition at 159.8, analogous to the well-known Se J=0 to 1 line at 182.4, was not definitively observed due to a wavelength overlap with a Na-like Sr line. Two other J=0 to 1 transitions of interest at 84.9 and 133.0 were not observed. Reduced gain on the J=2 to 1 lasing lines was seen for several shots taken at a lower pump laser intensity of 7.0×1013 W/cm2. Possible reasons for this are considered. The results of this work imply the feasibility of a high-output-power cavity geometry Ne-like Sr x-ray laser operating at 164.1 and 166.5.

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