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Title: Creating the Core Conditions of Extra-solar and Solar Giant Planets

Abstract

Materials can be experimentally characterized at high pressures and densities by sending a laser-induced shock wave through a sample that is pre-compressed inside a diamond-anvil cell. This combination of static- and dynamic-compression methods has been experimentally demonstrated, and ultimately provides access to the 10-100 TPa (0.1-1 Gbar) pressure range that is relevant to planetary science. We report on dynamical measurements of the high pressure compressibility of helium, hydrogen and helium/hydrogen mixtures up to 230 GPa by combining laser shocks and static compression in diamond anvil cells. The initial density of samples in these precompressed targets has been varied by a factor of 3. The measurements on the principal He Hugoniot, i.e with the initial density of cryo-helium, is extended above 100 GPa and a maximum of compression ratio of greater than 5-fold of the initial density is observed. Also, a strong decrease in compressibility is observed by increasing the initial density. A similar data set has been produced for precompressed H{sub 2} and a mixture of He and H{sub 2}.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
902290
Report Number(s):
UCRL-TR-228590
TRN: US200717%%522
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPRESSIBILITY; COMPRESSION; COMPRESSION RATIO; DIAMONDS; HELIUM; HYDROGEN; LASERS; MIXTURES; PLANETS; PRESSURE RANGE; SHOCK WAVES; TARGETS

Citation Formats

Celliers, P, Eggert, J, Collins, G, Brygoo, S, Jeanloz, R, McWilliams, R, Loubeyre, P, Boehly, T, and Miller, J. Creating the Core Conditions of Extra-solar and Solar Giant Planets. United States: N. p., 2007. Web. doi:10.2172/902290.
Celliers, P, Eggert, J, Collins, G, Brygoo, S, Jeanloz, R, McWilliams, R, Loubeyre, P, Boehly, T, & Miller, J. Creating the Core Conditions of Extra-solar and Solar Giant Planets. United States. doi:10.2172/902290.
Celliers, P, Eggert, J, Collins, G, Brygoo, S, Jeanloz, R, McWilliams, R, Loubeyre, P, Boehly, T, and Miller, J. Mon . "Creating the Core Conditions of Extra-solar and Solar Giant Planets". United States. doi:10.2172/902290. https://www.osti.gov/servlets/purl/902290.
@article{osti_902290,
title = {Creating the Core Conditions of Extra-solar and Solar Giant Planets},
author = {Celliers, P and Eggert, J and Collins, G and Brygoo, S and Jeanloz, R and McWilliams, R and Loubeyre, P and Boehly, T and Miller, J},
abstractNote = {Materials can be experimentally characterized at high pressures and densities by sending a laser-induced shock wave through a sample that is pre-compressed inside a diamond-anvil cell. This combination of static- and dynamic-compression methods has been experimentally demonstrated, and ultimately provides access to the 10-100 TPa (0.1-1 Gbar) pressure range that is relevant to planetary science. We report on dynamical measurements of the high pressure compressibility of helium, hydrogen and helium/hydrogen mixtures up to 230 GPa by combining laser shocks and static compression in diamond anvil cells. The initial density of samples in these precompressed targets has been varied by a factor of 3. The measurements on the principal He Hugoniot, i.e with the initial density of cryo-helium, is extended above 100 GPa and a maximum of compression ratio of greater than 5-fold of the initial density is observed. Also, a strong decrease in compressibility is observed by increasing the initial density. A similar data set has been produced for precompressed H{sub 2} and a mixture of He and H{sub 2}.},
doi = {10.2172/902290},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Feb 26 00:00:00 EST 2007},
month = {Mon Feb 26 00:00:00 EST 2007}
}

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