Inelastic x-ray scattering from high pressure fluids in a diamond anvil cell

Gorelli, F. A.; Santoro, M.; Scopigno, T.; Krisch, M.; Bryk, T.; Ruocco, G.; Ballerini, R.
February 2009
Applied Physics Letters;2/16/2009, Vol. 94 Issue 7, pN.PAG
Academic Journal
We present an experimental setup to study terahertz dynamics in fluids under high pressure, employing inelastic x-ray scattering and diamond anvil cell techniques. The use of a carefully designed vacuum chamber and the minimization and control of sources of parasitic scattering allowed circumventing previous limitations due to important empty cell contributions to the scattering signal. The successful implementation of our setup is demonstrated in the case of supercritical fluid argon, for which a full viscoelastic analysis yields the dispersion relation of sound waves, the generalized heat capacity ratio, and longitudinal viscosity. Our results are in excellent agreement with available experimental observables and molecular dynamics simulations.


Related Articles

  • Focusing polycapillary to reduce parasitic scattering for inelastic x-ray measurements at high pressure. Chow, P.; Xiao, Y. M.; Rod, E.; Bai, L. G.; Shen, G. Y.; Sinogeikin, S.; Gao, N.; Ding, Y.; Mao, H.-K. // Review of Scientific Instruments;Jul2015, Vol. 86 Issue 7, p1 

    The double-differential scattering cross-section for the inelastic scattering of x-ray photons from electrons is typically orders of magnitude smaller than that of elastic scattering. With samples 10-100 µm size in a diamond anvil cell at high pressure, the inelastic x-ray scattering signals...

  • Kinetic-freezing and unfreezing of local-region fluctuations in a glass structure observed by heat capacity hysteresis. Aji, D. P. B.; Johari, G. P. // Journal of Chemical Physics;2015, Vol. 142 Issue 21, p1 

    Fluctuations confined to local regions in the structure of a glass are observed as the Johari-Goldstein (JG) relaxation. Properties of these regions and their atomic configuration are currently studied by relaxation techniques, by electron microscopy, and by high-energy X-ray scattering and...

  • Multiplex Particle Focusing via Hydrodynamic Force in Viscoelastic Fluids. Doo Jin Lee; Brenner, Howard; Jae Ryoun Youn; Young Seok Song // Scientific Reports;11/22/2013, p1 

    We introduce a multiplex particle focusing phenomenon that arises from the hydrodynamic interaction between the viscoelastic force and the Dean drag force in a microfluidic device. In a confined microchannel, the first normal stress difference of viscoelastic fluids results in a lateral...

  • Transient x-ray scattering calculated from molecular dynamics. Bergsma, J. P.; Coladonato, M. H.; Edelsten, P. M.; Kahn, J. D.; Wilson, K. R.; Fredkin, D. R. // Journal of Chemical Physics;6/1/1986, Vol. 84 Issue 11, p6151 

    With the continued development of pulsed x-ray sources, it may in time be possible to use transient x-ray diffraction to follow the molecular dynamics of chemical reactions in the liquid and solid states. To explore this possibility from the theoretical side, we have calculated, using classical...

  • Molecular dynamics investigation of the size effect upon the β → α transformation in Zr nanocrystals. Dolgusheva, E. B.; Trubitsin, V. Yu. // Physics of the Solid State;Dec2009, Vol. 51 Issue 12, p2497 

    The stability of the β phase in cubic zirconium nanoparticles has been calculated as a function of the size r ( r varies in the range from 2.5 to 11.5 nm) by the molecular dynamics method with the many-body interatomic interaction potential obtained within the embedded-atom model. It has been...

  • Effect of Co doping on the static dielectric constant of ZnO nanoparticles. Ghosh, C. K.; Chattopadhyay, K. K.; Mitra, M. K. // Journal of Applied Physics;6/15/2007, Vol. 101 Issue 12, p124911 

    Co doped ZnO nanoparticles were synthesized by a simple rheological phase reaction-precursors method using zinc acetate, cobalt acetate, and oxalic acid for different atomic percentages of Co doping. X-ray diffraction studies confirmed the correct phase formation, and the composition were...

  • Origin of temperature plateaus in laser-heated diamond anvil cell experiments. Geballe, Zachary M.; Jeanloz, Raymond // Journal of Applied Physics;Jun2012, Vol. 111 Issue 12, p123518 

    Many high-pressure high-temperature studies using laser-heated diamond cells have documented plateaus in the increase of temperature with increasing laser power or with time. By modeling heat transfer in typical laser-heated diamond anvil cell experiments, we demonstrate that latent heat due to...

  • High pressure melting curve of tin measured using an internal resistive heating technique to 45 GPa. Weir, S. T.; Lipp, M. J.; Falabella, S.; Samudrala, G.; Vohra, Y. K. // Journal of Applied Physics;Jun2012, Vol. 111 Issue 12, p123529 

    The high pressure melting curve of tin was measured to 45 GPa using a designer diamond anvil cell with an integrated internal resistive heating element. Melting of the tin sample was detected by an abrupt increase in the electrical resistance of the sample and also by a change in the slope of...

  • Thermal conductivity of methanol-ethanol mixture and silicone oil at high pressures. Wen-Pin Hsieh // Journal of Applied Physics;2015, Vol. 117 Issue 23, p235901-1 

    4:1 methanol-ethanol (ME) mixture and silicone oil are common, important pressure transmitting media used in high pressure diamond anvil cell (DAC) experiments. Their thermal conductivities and elastic properties are critical for modeling heat conduction in the DAC experiments and for...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics