Professor Justin Wark: Publications

Thomson scattering measurements of heat flux from ion-acoustic waves in laser-produced aluminum plasmas

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 71:4 (2005)

Authors:

QZ Yu, J Zhang, YT Li, X Lu, J Hawreliak, J Wark, DM Chambers, ZB Wang, CX Yu, XH Jiang, WH Li, SY Liu, ZJ Zheng

Abstract:

Thomson scattering (TS) measurements are performed at different locations in a laser-produced aluminum plasma. Variations of the separation, wavelength shift, and asymmetric distribution of the two ion-acoustic waves are investigated from their spectral-time-resolved TS images. Detailed information on the space-time evolution of the plasma parameters is obtained. Electron distribution and variation of the heat flux in the plasma are also obtained for a steep temperature gradient. © 2005 The American Physical Society.

Picosecond X-ray Studies of coherent folded-acoustic-phonons in a multiple quantum well

Physical Review Letters 94 (2005) 125509 4pp

Authors:

JS Wark, P. Sondhauss, J. Larsson, M. Harbst

Clocking femtosecond x rays

Physical Review Letters 94:11 (2005)

Authors:

AL Cavalieri, DM Fritz, SH Lee, PM Bucksbaum, DA Reis, J Rudati, DM Mills, PH Fuoss, GB Stephenson, CC Kao, DP Siddons, DP Lowney, AG MacPhee, D Weinstein, RW Falcone, R Pahl, J Als-Nielsen, C Blome, S Düsterer, R Ischebeck, H Schlarb, H Schulte-Schrepping, T Tschentscher, J Schneider, O Hignette, F Sette, K Sokolowski-Tinten, HN Chapman, RW Lee, TN Hansen, O Synnergren, J Larsson, S Techert, J Sheppard, JS Wark, M Bergh, C Caleman, G Huldt, D Van Der Spoel, N Timneanu, J Hajdu, RA Akre, E Bong, P Emma, P Krejcik, J Arthur, S Brennan, KJ Gaffney, AM Lindenberg, K Luening, JB Hastings

Abstract:

Linear-accelerator-based sources will revolutionize ultrafast x-ray science due to their unprecedented brightness and short pulse duration. However, time-resolved studies at the resolution of the x-ray pulse duration are hampered by the inability to precisely synchronize an external laser to the accelerator. At the Sub-Picosecond Pulse Source at the Stanford Linear-Accelerator Center we solved this problem by measuring the arrival time of each high energy electron bunch with electro-optic sampling. This measurement indirectly determined the arrival time of each x-ray pulse relative to an external pump laser pulse with a time resolution of better than 60 fs rms. © 2005 The American Physical Society.

Intelligent design: The response

Physics World 18:12 (2005) 18-19

Authors:

JE MacDonald, S Morris, D Eaton, A McEvoy, A Steane, A Briggs, K Burnett, G Dalton, P Ewart, A Peacocke, J Wark, W Phillips, N Deliyanakis, GL Rogers, M Bland, RP Crease

Opportunities and challenges using short-pulse x-ray sources

Journal of Physics Conference Series IOP Publishing 21:1 (2005) 87

Authors:

J Larsson, O Synnergren, TN Hansen, K Sokolowski-Tinten, S Werin, C Caleman, J Hajdu, J Shepherd, JS Wark, AM Lindenberg, KJ Gaffney, JB Hastings

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