Oxford Centre for High Energy Density Science (OxCHEDS)

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X-ray laser enhancement with multi-pulsing

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 3156 (1997) 30-41

Authors:

Gregory J Tallents, JY Lin, A Demir, A Behjat, Raymond F Smith, Jie Zhang, E Wolfrum, Justin S Wark, Michael H Key, Ciaran LS Lewis, Andrew G MacPhee, SP McCabe, PJ Warwick, David Neely, SB Healey, Geoffrey J Pert, Peter V Nickles, Mikhail P Kalachnikov, Matthias Schnuerer
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Transient x-ray diffraction and its application to materials science and x-ray optics

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 3157 (1997) 72-83

Authors:

Allan A Hauer, Justin S Wark, Daniel H Kalantar, Bruce A Remington, Roger A Kopp, James A Cobble, Bruce Failor, George A Kyrala, M Meyers, R Springer, Thomas R Boehly
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Near-field spatial imaging of a Ni-like Ag 140-Å x-ray laser

Physical Review A American Physical Society (APS) 56:4 (1997) 3161-3165

Authors:

J Nilsen, J Zhang, AG MacPhee, J Lin, TW Barbee, C Danson, LB Da Silva, MH Key, CLS Lewis, D Neely, RMN O’Rourke, GJ Pert, R Smith, GJ Tallents, JS Wark, E Wolfrum
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Experimental and simulated profiles of the Al XIII Ly-α resonance line from a cylindrically expanding plasma

Journal of Quantitative Spectroscopy and Radiative Transfer Elsevier 58:4-6 (1997) 835-844

Authors:

PK Patel, JS Wark, O Renner, A Djaoui, SJ Rose, DJ Heading, A Hauer
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Experimental and simulated profiles of the Al XIII Ly-alpha resonance line from a cylindrically expanding plasma

J QUANT SPECTROSC RA 58:4-6 (1997) 835-844

Authors:

PK Patel, JS Wark, O Renner, A Djaoui, SJ Rose, DJ Heading, A Hauer

Abstract:

Spectral profiles of optically thick line radiation emitted by an expanding cylindrical laser-produced plasma have been recorded in high resolution using a vertical dispersion variant of the double-crystal spectrometer. By uniformly irradiating a narrow wire with a 1 ns pulse a quasi-steady plasma expansion is generated with a velocity gradient in excess of 10(9) s(-1). Such velocity fields strongly influence the transfer of radiation through a plasma, resulting in a complex distortion of the lineshapes of optically thick lines. We have computed theoretical profiles of the Al XIII Ly-alpha resonance line. Simulation of the laser-plasma interaction is performed using the 1D Lagrangian hydrocode MED103 which incorporates a non-LTE time-dependent excitation and ionisation package based on the average-atom model. Line emission profiles are calculated by the method of multi-frequency line transfer in the co-moving frame. We investigate the sensitivity of the lineshape on plasma parameters such as the velocity profile, comparing our theoretical predictions with experiment. (C) 1997 Published by Elsevier Science Ltd. All rights reserved.
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