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 language | English (US) |
|---|---|
| Pages (from-to) | 2327-2339 |
| Number of pages | 13 |
| Journal | Physical Review A |
| Volume | 42 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1990 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
Cite this
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 journal › Article
}
TY - JOUR
T1 - Soft-x-ray amplification in a laser-produced strontium plasma
AU - Keane, C. J.
AU - Matthews, Dennis L
AU - Rosen, M. D.
AU - Phillips, T. W.
AU - MacGowan, B. J.
AU - Whitten, B. L.
AU - Louis-Jacquet, M.
AU - Bourgade, J. L.
AU - Decoster, A.
AU - Jacquemot, S.
AU - Naccache, D.
AU - Thiell, G.
PY - 1990
Y1 - 1990
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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U2 - 10.1103/PhysRevA.42.2327
DO - 10.1103/PhysRevA.42.2327
M3 - Article
VL - 42
SP - 2327
EP - 2339
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 4
ER -