Aluminium He-β high-resolution spectroscopy and the observation of high field processes

TY - GEN

T1 - Aluminium He-β high-resolution spectroscopy and the observation of high field processes

AU - Woolsey, N. C.

AU - Courtois, C.

AU - Förster, E.

AU - Gregory, C. D.

AU - Hall, I. M.

AU - Howe, J.

AU - Renner, O.

AU - Uschmann, I.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - Helium-like aluminium (Z=13) plasmas created using long (nanosecond) and short (picosecond) duration laser pulses at intensities between 5 × 1013 and 5 × 1016 W/cm2 were studied using a combination of optical and X-ray spectroscopy methods and computational modeling tools. The experiments were designed to ensure that the K-shell emission spectra from the aluminium plasmas was measured in detail and that the spectra could be reproduced through a combination of hydrodynamic, atomic kinetic, and radiation transport models. Detailed spectral line shapes, with high spectral and spatial resolution, were recorded in an attempt to positively observed single frequency electric fields effects due to the application of a strong laser field, and due to strong laser-driven plasma waves. Spectral line shape modification due to laser-driven plasma waves was observed, yet there is no evidence for direct laser field effects. Experimental procedures and the computational work are outlined, the observation of modulated intensity profiles on the He-β transition and the interpretation based on intra-Stark spectroscopy discussed.

AB - Helium-like aluminium (Z=13) plasmas created using long (nanosecond) and short (picosecond) duration laser pulses at intensities between 5 × 1013 and 5 × 1016 W/cm2 were studied using a combination of optical and X-ray spectroscopy methods and computational modeling tools. The experiments were designed to ensure that the K-shell emission spectra from the aluminium plasmas was measured in detail and that the spectra could be reproduced through a combination of hydrodynamic, atomic kinetic, and radiation transport models. Detailed spectral line shapes, with high spectral and spatial resolution, were recorded in an attempt to positively observed single frequency electric fields effects due to the application of a strong laser field, and due to strong laser-driven plasma waves. Spectral line shape modification due to laser-driven plasma waves was observed, yet there is no evidence for direct laser field effects. Experimental procedures and the computational work are outlined, the observation of modulated intensity profiles on the He-β transition and the interpretation based on intra-Stark spectroscopy discussed.

KW - K-shell spectroscopy

KW - Laser-induced satellites

KW - Laser-produced-plasma

KW - Line shapes

UR - http://www.scopus.com/inward/record.url?scp=33846978743&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:33846978743

SN - 0735403708

SN - 9780735403703

VL - 874

SP - 76

EP - 86

BT - SPECTRAL LINE SHAPES

T2 - SPECTRAL LINE SHAPES: 18th International Conference on Spectral Line Shapes

Y2 - 4 June 2006 through 9 June 2006

ER -