Oxford Centre for High Energy Density Science (OxCHEDS)

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Ultrafast melting of carbon induced by intense proton beams

Physical Review Letters 105:26 (2010)

Authors:

A Pelka, G Gregori, DO Gericke, J Vorberger, SH Glenzer, MM Günther, K Harres, R Heathcote, AL Kritcher, NL Kugland, B Li, M Makita, J Mithen, D Neely, C Niemann, A Otten, D Riley, G Schaumann, M Schollmeier, A Tauschwitz, M Roth

Abstract:

Laser-produced proton beams have been used to achieve ultrafast volumetric heating of carbon samples at solid density. The isochoric melting of carbon was probed by a scattering of x rays from a secondary laser-produced plasma. From the scattering signal, we have deduced the fraction of the material that was melted by the inhomogeneous heating. The results are compared to different theoretical approaches for the equation of state which suggests modifications from standard models. © 2010 The American Physical Society.
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Controlling fast electron beam divergence using two laser pulses

(2010)

Authors:

RHH Scott, C Beaucourt, H-P Schlenvoigt, K Markey, KL Lancaster, CP Ridgers, CM Brenner, J Pasley, RJ Gray, IO Musgrave, APL Robinson, K Li, MM Notley, JR Davies, SD Baton, JJ Santos, J-L Feugeas, Ph Nicolaï, G Malka, VT Tikhonchuk, P McKenna, D Neely, SJ Rose, PA Norreys
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Applications of the wave kinetic approach: From laser wakefields to drift wave turbulence

Journal of Plasma Physics 76:6 (2010) 903-914

Authors:

RMGM Trines, R Bingham, LO Silva, JT Mendonça, PK Shukla, CD Murphy, MW Dunlop, JA Davies, R Bamford, A Vaivads, PA Norreys

Abstract:

Nonlinear wave-driven processes in plasmas are normally described by either a monochromatic pump wave that couples to other monochromatic waves, or as a random phase wave coupling to other random phase waves. An alternative approach involves a random or broadband pump coupling to monochromatic and/or coherent structures in the plasma. This approach can be implemented through the wave-kinetic model. In this model, the incoming pump wave is described by either a bunch (for coherent waves) or a sea (for random phase waves) of quasi-particles. This approach has been applied to both photon acceleration in laser wakefields and drift wave turbulence in magnetized plasma edge configurations. Numerical simulations have been compared to experiments, varying from photon acceleration to drift mode-zonal flow turbulence, and good qualitative correspondences have been found in all cases. © 2010 Cambridge University Press.
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Design of the 10 PW OPCPA facility for the vulcan laser

Optics InfoBase Conference Papers (2010)

Authors:

I Musgrave, O Chekhlov, J Collier, R Clarke, A Dunne, S Hancock, R Heathcote, C Hernandez-Gomez, M Galimberti, A Lyachev, P Matousek, D Neely, P Norreys, I Ross, Y Tang, T Winstone, G New

Abstract:

We present the progress made in developing 10PW OPCPA facility for the Vulcan laser to produce pulses with focused intensities >1023 Wcm-2. This power level will be delivered by generating pulses with >300J in 30fs. These pulses will be delivered to two target areas: in one target area they will be combined with the existing Vulcan Petawatt beamline and a new target area will be created for high intensity interactions. © 2010 Optical Society of America.

Design of the 10 PW OPCPA facility for the vulcan laser

Optics InfoBase Conference Papers (2010)

Authors:

I Musgrave, O Chekhlov, J Collier, R Clarke, A Dunne, S Hancock, R Heathcote, C Hernandez-Gomez, M Galimberti, A Lyachev, P Matousek, D Neely, P Norreys, I Ross, Y Tang, T Winstone, G New

Abstract:

We present the progress made in developing 10PW OPCPA facility for the Vulcan laser to produce pulses with focused intensities >1023 Wcm-2. This power level will be delivered by generating pulses with >300J in 30fs. These pulses will be delivered to two target areas: in one target area they will be combined with the existing Vulcan Petawatt beamline and a new target area will be created for high intensity interactions. © 2010 Optical Society of America.