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Articles by M. Millot
Multimessenger measurements of the static structure of shock-compressed liquid silicon at 100 GPa
The ionic structure of high-pressure, high-temperature fluids is a challenging theoretical problem with applications to planetary interiors and fusion capsules. Here we report a multimessenger platform using velocimetry and in situ angularly and spectrally resolved x-ray scattering to measure the thermodynamic conditions and ion structure factor of materials at extreme pressures.
The impact of low-mode symmetry on inertial fusion energy output in the burning plasma state - Nature Communications
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Abstract Indirect Drive Inertial Confinement Fusion Experiments on the National Ignition Facility (NIF) have achieved a burning plasma state with neutron yields exceeding 170 kJ, roughly 3 times the prior record and a necessary stage for igniting plasmas. The results are achieved despite multiple sources of degradations that lead to high variability in performance.
By J. Ralph, J. S. Ross, A. L. Kritcher, C. V. Young, O. A. Hurricane, D. T. Casey, M. Hohenberger, R. Tommasini, B. Bachmann, T. Braun, H. Chen, A. Christopherson, M. Johnson, S. H. Glenzer, K. D. Hahn, J. Harte, E. P. Hartouni, N. Izumi, S. M. Kerr, O. Landen, T. Ma, M. J. MacDonald, B. MacGowan, K. D. Meaney, M. Millot, J. L. Milovich, A. Moore, T. J. Murphy, R. Nora, Y. Ping, D. J. Schlossberg, B. K. Spears, D. J. Strozzi, K. Widmann, T. Döppner, J. Biener, W. A. Farmer, D. Fittinghoff, J. Gaffney, G. P. Grim, J. P. Holder, V. Geppert-Kleinrath, J. M. Koning, B. Kustowski, D. A. Mariscal, N. B. Meezan, H. G. Rinderknecht, H. A. Scott, C. Trosseille, E. R. Tubman, P. L. Volegov
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Nature
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Extended X-ray absorption fine structure of dynamically-compressed copper up to 1 terapascal - Nature Communications
Abstract Large laser facilities have recently enabled material characterization at the pressures of Earth and Super-Earth cores. However, the temperature of the compressed materials has been largely unknown, or solely relied on models and simulations, due to lack of diagnostics under these challenging conditions. Here, we report on temperature, density, pressure, and local structure of copper determined from extended x-ray absorption fine structure and velocimetry up to 1 Terapascal.
Ramp Compression of Germanium Dioxide to Extreme Conditions: Phase Transitions in an ${\mathrm{SiO}}_{2}$ Analog
Popular Summary Understanding the internal structure of rocky planets requires understanding how silica—expected to be the dominant component in these planets’ mantles—responds to high pressures. Phase transformations of silica at the relevant conditions have been studied using only theory, and those studies report conflicting results. However, germanium dioxide (GeO2) is widely seen as an analog for silica (SiO2), so understanding its crystal structure may shed light on the latter’s behavior.
X-ray diffraction measurements and pressure determination in nanosecond compression of solids up to 600 GPa
Abstract X-ray diffraction measurements under laser-driven dynamic compression now allow us to investigate the atomic structure of matter at TPa pressures and thousands of degree temperatures, with broad implications for condensed matter physics, planetary science, and astronomy.
Structure and density of silicon carbide to 1.5 TPa and implications for extrasolar planets - Nature Communications
Abstract There has been considerable recent interest in the high-pressure behavior of silicon carbide, a potential major constituent of carbon-rich exoplanets. In this work, the atomic-level structure of SiC was determined through in situ X-ray diffraction under laser-driven ramp compression up to 1.5 TPa; stresses more than seven times greater than previous static and shock data.
Physics of Plasmas: Vol DPP62, No 1
Papers from the 62nd Annual Meeting of the APS Division of Plasma Physics M. K. Warrens, G. M. Gorman, S. J. Bradshaw and T. C. Killian more... more... L. E. Crandall, J. R. Rygg, D. K. Spaulding, M. F. Huff, M. C. Marshall, D. N. Polsin, R. Jeanloz, T. R. Boehly, M. Zaghoo, B. J. Henderson, S. Brygoo, P. M. Celliers, J. H. Eggert, D. E. Fratanduono, A. Lazicki, M. Millot and G. W. Collins more... Zan Nie, Yipeng Wu, Chaojie Zhang, Warren B. Mori, Chan Joshi, Wei Lu, Chih-Hao Pai, Jianfei Hua and Jyhpyng Wang more... more... more... W. A.
Establishing gold and platinum standards to 1 terapascal using shockless compression
Research Article View ORCID ProfileD. E. Fratanduono1,*, View ORCID ProfileM. Millot1, D. G. Braun1, View ORCID ProfileS. J. Ali1, View ORCID ProfileA. Fernandez-Pañella1, C. T. Seagle2, View ORCID ProfileJ.-P. Davis2, View ORCID ProfileJ. L. Brown2, View ORCID ProfileY. Akahama3, View ORCID ProfileR. G. Kraus1, View ORCID ProfileM. C. Marshall1, View ORCID ProfileR. F. Smith1, View ORCID ProfileE. F. O’Bannon III1, View ORCID ProfileJ. M. McNaney1, View ORCID ProfileJ. H.
Evidence of hydrogen−helium immiscibility at Jupiter-interior conditions
Abstract The phase behaviour of warm dense hydrogen−helium (H−He) mixtures affects our understanding of the evolution of Jupiter and Saturn and their interior structures1,2. For example, precipitation of He from a H−He atmosphere at about 1−10 megabar and a few thousand kelvin has been invoked to explain both the excess luminosity of Saturn1,3, and the depletion of He and neon (Ne) in Jupiter’s atmosphere as observed by the Galileo probe4,5.
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