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Culfa, O.*; Tallents, G. J.*; Wagenaars, E.*; Ridgers, C. P.*; Dance, R. J.*; Rossall, A. K.*; Gray, R. J.*; McKenna, P.*; Brown, C. D. R.*; James, S. F.*; et al.
Physics of Plasmas, 21(4), p.043106_1 - 043106_5, 2014/04
被引用回数：27 パーセンタイル：73.34(Physics, Fluids & Plasmas)Hot electrons of temperature up to 10-20 MeV have been produced by high contrast picosecond duration laser pulses focused to intensities of 
10
Wcm
with a deliberate pre-pulse on solid targets using the Vulcan Petawatt Laser facility. The measurement of the number and temperature of hot electrons obtained using an electron spectrometer. The results are correlated to the density scale length of the plasma produced by a controlled pre-pulse measured using an optical probe diagnostic. The experimental results show that longer interaction plasmas produced by pre-pulses enable significantly greater number of hot electrons to be produced.
Hansen, S. B.*; Colgan, J.*; Faenov, A. Ya.*; Abdallah, J. Jr.*; Pikuz, S. A. Jr.*; Skobelev, I. Yu.*; Wagenaars, E.*; Booth, N.*; Culfa, O.*; Dance, R. J.*; et al.
Physics of Plasmas, 21(3), p.031213_1 - 031213_9, 2014/03
被引用回数：39 パーセンタイル：83.04(Physics, Fluids & Plasmas)X-ray emission from hollow ions offers new diagnostic opportunities for dense, strongly coupled plasma. We present extended modeling of the X-ray emission spectrum obtained in relativistic laser plasma based on two collisional-radiative codes: the hybrid-structure SCRAM model and the mixed-unresolved transitional arrays (UTA) ATOMIC model.
Pikuz, S. Jr.*; Wagenaars, E.*; Culfa, O.*; Dance, R.*; Rossall, A.*; Tallents, G.*; Faenov, A.*; K
mpfer, T.*; Schulze, K.*; Uschmann, I.*; et al.
no journal, ,
Aluminum K-shell spectra from solid targets were measured during an experiment at Vulcan Petawatt facility. Laser pulses of very high contrast and 150 J of energy allowed interaction studies between the very high intensive laser field and solid state. Intense emission of exotic spectral lines related to the transitions in Al hollow atoms were observed from Al targets. Specifically for 1.5 micron thin foil target the hollow atom yield dominated the resonance line emission. It is suggested that the hollow atoms were predominantly excited by the impact of keV X-ray photons generated on the front surface of the target. On the contrary, the spectra of aluminum foils buried in several microns of CH demonstrated lower K-shell emission and contained much weaker yield of hollow-atom lines. In this case the laser did not interact directly with aluminum matter, so most probably hollow atoms excited by fast electrons penetrating the target.
W/cmFaenov, A.*; Colgan, J.*; Abdallah, J. Jr.*; Pikuz, S. A.*; Wagenaars, E.*; Booth, N.*; Brown, C. R. D.*; Culfa, O.*; Dance, R.*; Evans, R.*; et al.
no journal, ,
It was demonstrated that Hollow ions exotic states of matter, which are very far from equilibrium, can be formed by conventional optical laser technology when the laser intensity reached 10 W/cm and approaches to the radiation dominant regime.
