Measurements of the electron concentration and conductivity of a partially ionized inert gas plasma

Holst

Redmer

2005

Section: Introductionmentioning

confidence: 99%

COMPTRA04 - a Program Package to Calculate Composition and Transport Coefficients in Dense Plasmas

Holst

Redmer

2005

“…Fig. 6 Isotherms of the electrical conductivity in helium plasma as function of the mass density compared with shock-wave experiments of Ternovoi et al [62], Shilkin et al [63], and Mintsev et al [64]; see also [59].…”

Section: Electrical Conductivity and Nonmetal-to-metal Transitionmentioning

confidence: 97%

Metal‐Nonmetal Transition in Dense Plasmas

Juranek

Nettelmann

et al. 2005

We have developed a theoretical approach to the equation of state of dense plasmas which has been applied to hydrogen and deuterium, various metals and noble gases. We compare Hugoniot curves and the sound speed with shock-wave experiments and other theoretical predictions. Especially, the nonmetal-to-metal transition which occurs in dense plasmas at high pressures is discussed by means of the electrical conductvity.

“…The explosively driven shock wave technique [1,2,3,4,5,6,7,8,9,10,11,12,13,25] was used to generate dense shock compressed plasmas of noble gases at high pressures and temperatures. The electrical conductivity was measured using different setups of plasma flows.…”

Section: Description Of the Experimentsmentioning

confidence: 99%

“…In [3,4,8,9,10,11], shock-compressed plasmas were realized behind the front of the incident shock wave. Measurements of the electrical conductivity of noble gases behind the reflected shock wave were done in [2,10]. Compression of the plasma by a series of incident and reflected shock waves (multiple shock compression) [1,12,13] was used for the experimental study of pressure ionization in plasmas at megabar pressures.…”

Section: Description Of the Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Electrical Conductivity of Noble Gases at High Pressures

Redmer

Reinholz

et al. 2005

Self Cite

We present experimental and theoretical results for the electrical conductivity of noble gases (He, Ne, Ar, Kr, Xe) up to high pressures where a transition from nonmetallic to metallic-like conductivities occurs. In addition, we show the behavior of the thermal conductivity and thermopower for xenon as an example. The experiments were performed using explosively driven shock waves. Different geometries allow to probe various parameter regions up to several megabars. Besides single-shock experiments along the principal Hugoniot curve, also multiple-shock experiments were performed which follow almost an isentrope. The theoretical calculations were performed within a partially ionized plasma model. The composition is determined by solving a system of mass action laws. The transport coefficients are calculated within linear response theory taking into account the relevant scattering mechanisms of electrons at different ion species, atoms, and other electrons. The general trends of the experimental results can be explained within this theoretical approach.