Professor Justin Wark: Publications

KeV spectroscopic diagnostic for the performance of Ni-like x-ray lasers

INST PHYS CONF SER 159 (1999) 471-474

Authors:

J Zhang, E Wolfrum, J Lin, A Djaoui, CLS Lewis, A MacPhee, G Cairns, RMN O'Rourke, R Smith, GJ Tallents, JS Wark

Abstract:

In order to understand the improved performance of Ni-like x-ray lasers driven by a double 75 ps laser pulse, a systematic study on keV emission from plasmas generated by different drive pulse configurations has been made. Significant changes in temperatures and relative abundances of the ionisation stages for different drive pulse configurations have been found with the help of numerical simulations.

Optimization of double pulse pumping for Ni-like Sm x-ray lasers

JOURNAL OF APPLIED PHYSICS 85:2 (1999) 672-675

Authors:

JY Lin, GJ Tallents, R Smith, AG MacPhee, E Wolfrum, J Zhang, G Eker, R Keenan, CLS Lewis, D Neely, RMN O'Rourke, GJ Pert, SJ Pestehe, JS Wark

Overview of X-ray laser research in the UK

INST PHYS CONF SER 159 (1999) 1-8

Authors:

CLS Lewis, R Keenan, AG MacPhee, RMN O'Rourke, GJ Tallents, G Eker, JY Lin, SJ Pestehe, R Smith, JS Wark, E Wolfrum, J Zhang, GJ Pert, SP McCabe, PA Simms, RE Burge, MT Browne, P Charalambous, D Neely, J Collier, CN Danson

Abstract:

Developments in collision-pumped X-ray lasers using a variety of pumping configurations made possible by the versatile VULCAN glass laser at the Central Laser Facility are described. Optimised pumping configurations for nickel-like ions in the QSS regime has lead to saturated outputs at wavelengths as low as 5.8 nm and CPA technology has enabled travelling wave pumping in the TCE regime to deliver saturated output at 12.0 nm, from nickel-like tin. New directions, stemming from availability of more intense pumps and brighter XRLs are discussed briefly.

Simulations of femtosecond X-ray diffraction from unperturbed and rapidly heated single crystals

JOURNAL OF APPLIED CRYSTALLOGRAPHY 32 (1999) 692-703

Authors:

JS Wark, RW Lee

Vertical variant of a double channel-cut crystal spectrometer for investigation of laser-generated plasmas

REVIEW OF SCIENTIFIC INSTRUMENTS 70:7 (1999) 3025-3031

Authors:

O Renner, PK Patel, JS Wark, E Krousky, PE Young, RW Lee

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