Observation of multiply ionized plasmas with dominant bound electron contribution to the index of refraction

Shlyaptsev, Vyacheslav N., author; Hunter, James R., author; Keenan, Roisin, author; Smith, Raymond F., author; Dunn, James, author; Scofield, J. H., author; Nilsen, Joseph, author; Moon, Stephen J., author; Marconi, Mario Carlos, author; Rocca, Jorge, J., author; Filevich, Jorge, author; Elsevier Ltd., publisher

Observation of multiply ionized plasmas with dominant bound electron contribution to the index of refraction

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ECEmcm00019.pdf (627.14 KB)

Date

2006

Authors

Shlyaptsev, Vyacheslav N., author

Hunter, James R., author

Keenan, Roisin, author

Smith, Raymond F., author

Dunn, James, author

Scofield, J. H., author

Nilsen, Joseph, author

Moon, Stephen J., author

Marconi, Mario Carlos, author

Rocca, Jorge, J., author

Abstract

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.

Subject

interferometry

soft x-ray laser

index of refraction

plasmas

anomalous dispersion

URI

http://hdl.handle.net/10217/2129

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Observation of multiply ionized plasmas with dominant bound electron contribution to the index of refraction

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