Hugoniot data for helium in the ionization regime.
نویسندگان
چکیده
Hugoniot data were obtained for fluid He in the 100 GPa pressure range by shock compression of samples statically precompressed in diamond-anvil cells. The initial (precompressed) He density (rho_(1)) for each experiment was tuned to a value between rho_(0L) or =3rho_{0L} (i.e., rho/rho_(0L)> or =12). Data show an increase in compressibility at the onset of ionization, similar to theoretical predictions.
منابع مشابه
Study of laser ablation using nano-second laser pulses
In this paper, the laser ablation process based on the irradiation of nanosecond pulsed lasers on a copper target surface in the presence of Helium gas is studied. The dynamical behaviors of the generated plasma in the helium gas and evaporated copper at the atmospheric pressure are examined using a laser pulse, laser wavelength of and intensity of 7×1010W/cm2. A one-dimensional thermal model ...
متن کاملPath integral Monte Carlo calculations of helium and hydrogen-helium plasma thermodynamics and of the deuterium shock Hugoniot
In this work we calculate the thermodynamic properties of hydrogenhelium plasmas with different mass fractions of helium by the direct path integral Monte Carlo method. To avoid unphysical approximations we use the path integral representation of the density matrix. We pay special attention to the region of weak coupling and degeneracy and compare the results of simulation with a model based on...
متن کاملFirst-Principles Equation of State Calculations of Warm Dense Nitrogen
Using path integral Monte Carlo (PIMC) and density functional molecular dynamics (DFT-MD) simulation methods, we compute a coherent equation of state (EOS) of nitrogen that spans the liquid, warm dense matter (WDM), and plasma regimes. Simulations cover a wide range of densitytemperature space, 1.5 − 13.9 g cm and 10 − 10 K. In the molecular dissociation regime, we extend the pressure-temperatu...
متن کاملAbstract Submitted for the DAMOP11 Meeting of The American Physical Society Two-photon ionization of Helium studied with the multicon- figurational time-dependent Hartree-Fock method1 DAVID HOCHSTUHL,
Submitted for the DAMOP11 Meeting of The American Physical Society Two-photon ionization of Helium studied with the multiconfigurational time-dependent Hartree-Fock method1 DAVID HOCHSTUHL, MICHAEL BONITZ, Institute for Theoretical Physics and Astrophysics, University of Kiel, Germany — The multiconfigurational time-dependent Hartree-Fock method (MCTDHF) is applied for simulations of the two-ph...
متن کاملProbing nonadiabatic effects in strong-field tunnel ionization.
We investigate experimentally the validity of proposed theories extending the tunneling approximation towards the multiphoton regime in strong-field ionization of helium. We employ elliptically polarized laser pulses and demonstrate how the influence of the ion potential on the released electron encoded in the measured observable provides the desired sensitivity to detect nonadiabatic effects i...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 100 12 شماره
صفحات -
تاریخ انتشار 2008