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Gianluca Gregori

Professor of Physics

Research theme

  • Lasers and high energy density science
  • Plasma physics

Sub department

  • Atomic and Laser Physics

Research groups

  • Laboratory astroparticle physics
  • Oxford Centre for High Energy Density Science (OxCHEDS)
Gianluca.Gregori@physics.ox.ac.uk
Telephone: 01865 (2)82639
Clarendon Laboratory, room 029.8
  • About
  • Publications

Ablation Measurements Using Ni-Like Ag X-Ray Laser Transmission

Chapter in X-Ray Lasers 2008, Springer Nature 130 (2009) 366-372

Authors:

N Booth, MH Edwards, Z Zhai, GJ Tallents, T Dzelzainis, R Ferrari, CLS Lewis, G Gregori, D Neely

Abstract:

Abstract. Results of a recent experiment to measure laser ablation rates from solid targets consisting of thin (50 nm) Fe at irradiances of ~ 2×1013 Wcm−2 are presented. A Ni-like Ag X-ray laser at 13.9 nm was utilised to probe the targets and measurements of the transmission of the X-ray laser through the target were recorded by a flat-field spectrometer. The laser ablation rate is determined by the transmission of the X-ray laser through the remaining, unablated, iron layer. A self-regulating model of laser ablation is fitted to the experimental data to give a value of the absorption, A, of the heating laser in the target plasma of A = 0.01.
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An Attempt to Generate an Inner-Shell Photo-Ionisation Pumped X-Ray Laser Using the ASTRA Laser at RAL

Springer Proceedings in Physics Springer Nature 130 (2009) 537-542

Authors:

TWJ Dzelzainis, M Streeter, FY Khattak, R Ferrari, CLS Lewis, D Riley, R Tommasini, G Gregori
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Hybrid Simulations for the Ion Structure and Dynamics in Dense Plasmas

ATOMIC PROCESSES IN PLASMAS 1161 (2009) 280-+

Authors:

G Gregori, J Vorberger, DO Gericke
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Soft X-Ray Thomson Scattering in Warm Dense Matter at FLASH

Chapter in Ultrafast Phenomena XVI, Springer Nature 92 (2009) 241-243

Authors:

RR Fäustlin, S Toleikis, Th Bornath, L Cao, T Döppner, S Düsterer, E Förster, C Fortmann, SH Glenzer, S Göde, G Gregori, A Höll, R Irsig, T Laarmann, HJ Lee, KH Meiwes-Broer, A Przystawik, P Radcliffe, R Redmer, H Reinholz, G Röpke, R Thiele, J Tiggesbäumker, NX Truong, I Uschmann, U Zastrau, Th Tschentscher
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Bremsstrahlung and line spectroscopy of warm dense aluminum plasma heated by xuv free-electron-laser radiation

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 78:6 (2008)

Authors:

U Zastrau, C Fortmann, RR Fäustlin, LF Cao, T Döppner, S Düsterer, SH Glenzer, G Gregori, T Laarmann, HJ Lee, A Przystawik, P Radcliffe, H Reinholz, G Röpke, R Thiele, J Tiggesbäumker, NX Truong, S Toleikis, I Uschmann, A Wierling, T Tschentscher, E Förster, R Redmer

Abstract:

We report the creation of solid-density aluminum plasma using free-electron laser (FEL) radiation at 13.5 nm wavelength. Ultrashort pulses were focused on a bulk Al target, yielding an intensity of 2× 1014/cm2. The radiation emitted from the plasma was measured using an xuv spectrometer. Bremsstrahlung and line intensity ratios yield consistent electron temperatures of about 38 eV, supported by radiation hydrodynamics simulations. This shows that xuv FELs heat up plasmas volumetrically and homogeneously at warm-dense-matter conditions, which are accurately characterized by xuv spectroscopy. © 2008 The American Physical Society.
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