X-ray continuum emission spectroscopy from hot dense matter at Gbar pressures

D Kraus; T Döppner; A L Kritcher; B Bachmann; D A Chapman; G W Collins; S H Glenzer; J A Hawreliak; O L Landen; T Ma; S Le Pape; P Neumayer; D C Swift; R W Falcone

doi:10.1063/1.4890263

X-ray continuum emission spectroscopy from hot dense matter at Gbar pressures

Rev Sci Instrum. 2014 Nov;85(11):11D606. doi: 10.1063/1.4890263.

Authors

D Kraus¹, T Döppner², A L Kritcher², B Bachmann², D A Chapman³, G W Collins², S H Glenzer⁴, J A Hawreliak², O L Landen², T Ma², S Le Pape², P Neumayer⁵, D C Swift², R W Falcone¹

Affiliations

¹ Department of Physics, University of California, Berkeley, California 94720, USA.
² Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
³ Plasma Physics Group, Radiation Physics Department, AWE plc, Reading RG7 4PR, United Kingdom and Centre for Fusion, Space and Astrophysics, University of Warwick, Coventry CV4 7AL, United Kingdom.
⁴ SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA.
⁵ GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany.

PMID: 25430182
DOI: 10.1063/1.4890263

Abstract

We have measured the time-resolved x-ray continuum emission spectrum of ∼30 times compressed polystyrene created at stagnation of spherically convergent shock waves within the Gbar fundamental science campaign at the National Ignition Facility. From an exponential emission slope between 7.7 keV and 8.1 keV photon energy and using an emission model which accounts for reabsorption, we infer an average electron temperature of 375 ± 21 eV, which is in good agreement with HYDRA-1D simulations.