Observation of multiply ionized plasmas with dominant bound electron contribution to the index of refraction Filevich, Jorge ; Rocca, Jorge, J. ; Marconi, Mario Carlos ; Moon, Stephen J. ; Nilsen, Joseph ; Scofield, J. H. ; Dunn, James, 1959- ; Smith, Raymond F. ; Keenan, Roisin ; Hunter, James R. ; Shlyaptsev, Vyacheslav N. "This work was sponsored by the National Nuclear Security Administration under the Stewardship Science Academic Alliances program through DOE Research Grant # DE-FG03-02NA00062. Part of this work was performed under the auspices of the US Department of Energy by the University of California, Lawrence Livermore National Laboratory through the Institute of Laser Science and Application, under Contract No. W-7405-Eng-48. The CSU researchers also gratefully acknowledge the partial support of the NSF ERC Center for Extreme Ultraviolet Science and Technology, award EEC-0310717." We report anomalous fringe shifts observed in soft X-ray laser interferograms of laser-created Al plasmas. This clear experimental evidence shows that the contribution of bound electrons can dominate the index of refraction of laser-created plasmas at soft X-ray wavelengths, resulting in values greater than 1. The comparison of measured and simulated interferograms shows that this results from the dominant contribution of low-charge ions to the index of refraction. This usually neglected bound electron contribution can affect the propagation of soft X-ray radiation in plasmas and the interferometric diagnostics of plasmas for many elements. Colorado State University. Libraries 2006 text ; image application/pdf ECEmcm00019.pdf FACFECEN100431ARTI eng c2006 Elsevier Ltd.
Observation of multiply ionized plasmas with dominant bound electron contribution to the index of refraction
Filevich, Jorge ; Rocca, Jorge, J. ; Marconi, Mario Carlos ; Moon, Stephen J. ; Nilsen, Joseph ; Scofield, J. H. ; Dunn, James, 1959- ; Smith, Raymond F. ; Keenan, Roisin ; Hunter, James R. ; Shlyaptsev, Vyacheslav N.
"This work was sponsored by the National Nuclear Security Administration under the Stewardship Science Academic Alliances program through DOE Research Grant # DE-FG03-02NA00062. Part of this work was performed under the auspices of the US Department of Energy by the University of California, Lawrence Livermore National Laboratory through the Institute of Laser Science and Application, under Contract No. W-7405-Eng-48. The CSU researchers also gratefully acknowledge the partial support of the NSF ERC Center for Extreme Ultraviolet Science and Technology, award EEC-0310717."
We report anomalous fringe shifts observed in soft X-ray laser interferograms of laser-created Al plasmas. This clear experimental evidence shows that the contribution of bound electrons can dominate the index of refraction of laser-created plasmas at soft X-ray wavelengths, resulting in values greater than 1. The comparison of measured and simulated interferograms shows that this results from the dominant contribution of low-charge ions to the index of refraction. This usually neglected bound electron contribution can affect the propagation of soft X-ray radiation in plasmas and the interferometric diagnostics of plasmas for many elements.
Colorado State University. Libraries
2006
text ; image
application/pdf
ECEmcm00019.pdf
FACFECEN100431ARTI
eng
c2006 Elsevier Ltd.