Search Results - "Hammel, B"

Shock vaporization of silica and the thermodynamics of planetary impact events by Kraus, R. G., Stewart, S. T., Swift, D. C., Bolme, C. A., Smith, R. F., Hamel, S., Hammel, B. D., Spaulding, D. K., Hicks, D. G., Eggert, J. H., Collins, G. W.

“…The most energetic planetary collisions attain shock pressures that result in abundant melting and vaporization. Accurate predictions of the extent of melting…”
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Machine learning assisted bayesian inference of mix and hot-spot conditions in NIF implosions by Hammel, B.A., Hammel, B.D., Scott, H.A., Peterson, J. Luc

“…Experiments on the National Ignition Facility (NIF) have provided clear evidence of ablator material mixing into the Hot-Spot, leading to degraded performance…”
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Detection of carbon dioxide and hydrogen peroxide on the stratified surface of Charon with JWST by Protopapa, Silvia, Raut, Ujjwal, Wong, Ian, Stansberry, John, Villanueva, Geronimo L., Cook, Jason, Holler, Bryan, Grundy, William M., Brunetto, Rosario, Cartwright, Richard J., Mamo, Bereket, Emery, Joshua P., Parker, Alex H., Guilbert-Lepoutre, Aurelie, Pinilla-Alonso, Noemi, Milam, Stefanie N., Hammel, Heidi B.

“…Charon, Pluto’s largest moon, has been extensively studied, with research focusing on its primitive composition and changes due to radiation and photolysis…”
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Mid-infrared spectroscopy of Uranus from the Spitzer infrared spectrometer: 2. Determination of the mean composition of the upper troposphere and stratosphere by Orton, Glenn S., Moses, Julianne I., Fletcher, Leigh N., Mainzer, Amy K., Hines, Dean, Hammel, Heidi B., Martin-Torres, Javier, Burgdorf, Martin, Merlet, Cecile, Line, Michael R.

“…•5–37μm spectra of Uranus from the Spitzer IRS were analyzed for composition.•Abundances of CH4, C2H2, C2H6, CH3C2H, C4H2 and CO2 were derived.•Our results…”
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Measurement of Hydrodynamic Growth near Peak Velocity in an Inertial Confinement Fusion Capsule Implosion using a Self-Radiography Technique by Pickworth, L A, Hammel, B A, Smalyuk, V A, MacPhee, A G, Scott, H A, Robey, H F, Landen, O L, Barrios, M A, Regan, S P, Schneider, M B, Hoppe, M, Kohut, T, Holunga, D, Walters, C, Haid, B, Dayton, M

“…First measurements of hydrodynamic growth near peak implosion velocity in an inertial confinement fusion (ICF) implosion at the National Ignition Facility were…”
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Measurement of Dark Ice-Ablator Mix in Inertial Confinement Fusion by Bachmann, B, MacLaren, S A, Bhandarkar, S, Briggs, T, Casey, D, Divol, L, Döppner, T, Fittinghoff, D, Freeman, M, Haan, S, Hall, G N, Hammel, B, Hartouni, E, Izumi, N, Geppert-Kleinrath, V, Khan, S, Kozioziemski, B, Krauland, C, Landen, O, Mariscal, D, Marley, E, Masse, L, Meaney, K, Mellos, G, Moore, A, Pak, A, Patel, P, Ratledge, M, Rice, N, Rubery, M, Salmonson, J, Sater, J, Schlossberg, D, Schneider, M, Smalyuk, V A, Trosseille, C, Volegov, P, Weber, C, Williams, G J, Wray, A

“…We present measurements of ice-ablator mix at stagnation of inertially confined, cryogenically layered capsule implosions. An ice layer thickness scan with…”
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Mid-infrared spectroscopy of Uranus from the Spitzer Infrared Spectrometer: 1. Determination of the mean temperature structure of the upper troposphere and stratosphere by Orton, Glenn S., Fletcher, Leigh N., Moses, Julianne I., Mainzer, Amy K., Hines, Dean, Hammel, Heidi B., Martin-Torres, F. Javier, Burgdorf, Martin, Merlet, Cecile, Line, Michael R.

“…•We obtained the best 5–37micron spectra of Uranus from the Spitzer IRS near its equinox.•The spectra appear to be diagnostic of temperatures nearly as deep as…”
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X-ray Thomson-scattering measurements of density and temperature in shock-compressed beryllium by Lee, H J, Neumayer, P, Castor, J, Döppner, T, Falcone, R W, Fortmann, C, Hammel, B A, Kritcher, A L, Landen, O L, Lee, R W, Meyerhofer, D D, Munro, D H, Redmer, R, Regan, S P, Weber, S, Glenzer, S H

“…We present the first x-ray scattering measurements of the state of compression and heating in laser irradiated solid beryllium. The scattered spectra at two…”
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Variability of Disk Emission in Pre-Main-Sequence and Related Stars. I. HD 31648 and HD 163296: Isolated Herbig Ae Stars Driving Herbig-Haro Flows by Sitko, Michael L, Carpenter, William J, Kimes, Robin L, Wilde, J. Leon, Lynch, David K, Russell, Ray W, Rudy, Richard J, Mazuk, Stephan M, Venturini, Catherine C, Puetter, Richard C, Grady, Carol A, Polomski, Elisha F, Wisnewski, John P, Brafford, Suellen M, Hammel, H. B, Perry, R. Brad

“…Infrared photometry and spectroscopy covering a time span of a quarter- century are presented for HD 31648 (MWC 480) and HD 163296 (MWC 275). Both are isolated…”
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A spatially resolved high spectral resolution study of Neptune’s stratosphere by Greathouse, Thomas K., Richter, Matthew, Lacy, John, Moses, Julianne, Orton, Glenn, Encrenaz, Therese, Hammel, H.B., Jaffe, Dan

“…► Temperature retrievals are similar to previous measurements of Neptune’s stratosphere. ► No meridional temperature variations are found within the errors. ►…”
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Triplicity and physical characteristics of Asteroid (216) Kleopatra by Descamps, P., Marchis, F., Berthier, J., Emery, J.P., Duchêne, G., de Pater, I., Wong, M.H., Lim, L., Hammel, H.B., Vachier, F., Wiggins, P., Teng-Chuen-Yu, J.-P., Peyrot, A., Pollock, J., Assafin, M., Vieira-Martins, R., Camargo, J.I.B., Braga-Ribas, F., Macomber, B.

“…► In this study we observed and modelled the Asteroid (216) Kleopatra through different technics. ► The work revealed two moonlets orbiting Kleopatra. ► From…”
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Onset of hydrodynamic mix in high-velocity, highly compressed inertial confinement fusion implosions by Ma, T, Patel, P K, Izumi, N, Springer, P T, Key, M H, Atherton, L J, Benedetti, L R, Bradley, D K, Callahan, D A, Celliers, P M, Cerjan, C J, Clark, D S, Dewald, E L, Dixit, S N, Döppner, T, Edgell, D H, Epstein, R, Glenn, S, Grim, G, Haan, S W, Hammel, B A, Hicks, D, Hsing, W W, Jones, O S, Khan, S F, Kilkenny, J D, Kline, J L, Kyrala, G A, Landen, O L, Le Pape, S, MacGowan, B J, Mackinnon, A J, MacPhee, A G, Meezan, N B, Moody, J D, Pak, A, Parham, T, Park, H-S, Ralph, J E, Regan, S P, Remington, B A, Robey, H F, Ross, J S, Spears, B K, Smalyuk, V, Suter, L J, Tommasini, R, Town, R P, Weber, S V, Lindl, J D, Edwards, M J, Glenzer, S H, Moses, E I

“…Deuterium-tritium inertial confinement fusion implosion experiments on the National Ignition Facility have demonstrated yields ranging from 0.8 to 7×10(14),…”
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Lessons learned from (and since) the Voyager 2 flybys of Uranus and Neptune by Hammel, Heidi B.

“…More than 30 years have passed since the Voyager 2 flybys of Uranus and Neptune. This paper outlines a range of lessons learned from Voyager, broadly grouped…”
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Experiments and multiscale simulations of laser propagation through ignition-scale plasmas by Glenzer, S. H, Froula, D. H, Divol, L, Dorr, M, Berger, R. L, Dixit, S, Hammel, B. A, Haynam, C, Hittinger, J. A, Holder, J. P, Jones, O. S, Kalantar, D. H, Landen, O. L, Langdon, A. B, Langer, S, MacGowan, B. J, Mackinnon, A. J, Meezan, N, Moses, E. I, Niemann, C, Still, C. H, Suter, L. J, Wallace, R. J, Williams, E. A, Young, B. K. F

“…With the next generation of high-power laser facilities for inertial fusion coming online, ensuring laser beam propagation through centimetre-scale plasmas is…”
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Hot-spot mix in ignition-scale inertial confinement fusion targets by Regan, S P, Epstein, R, Hammel, B A, Suter, L J, Scott, H A, Barrios, M A, Bradley, D K, Callahan, D A, Cerjan, C, Collins, G W, Dixit, S N, Döppner, T, Edwards, M J, Farley, D R, Fournier, K B, Glenn, S, Glenzer, S H, Golovkin, I E, Haan, S W, Hamza, A, Hicks, D G, Izumi, N, Jones, O S, Kilkenny, J D, Kline, J L, Kyrala, G A, Landen, O L, Ma, T, MacFarlane, J J, MacKinnon, A J, Mancini, R C, McCrory, R L, Meezan, N B, Meyerhofer, D D, Nikroo, A, Park, H-S, Ralph, J, Remington, B A, Sangster, T C, Smalyuk, V A, Springer, P T, Town, R P J

“…Mixing of plastic ablator material, doped with Cu and Ge dopants, deep into the hot spot of ignition-scale inertial confinement fusion implosions by…”
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A dynamical solution of the triple asteroid system (45) Eugenia by Marchis, F., Lainey, V., Descamps, P., Berthier, J., Van Dam, M., de Pater, I., Macomber, B., Baek, M., Le Mignant, D., Hammel, H.B., Showalter, M., Vachier, F.

“…We present the first dynamical solution of the triple asteroid system (45) Eugenia and its two moons Petit–Prince (diameter ∼ 7 km) and S/2004 (45) 1 (diameter…”
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Seeing double at Neptune’s south pole by Luszcz-Cook, S.H., de Pater, I., Ádámkovics, M., Hammel, H.B.

“…Keck near-infrared images of Neptune from UT 26 July 2007 show that the cloud feature typically observed within a few degrees of Neptune’s south pole had split…”
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TREASUREHUNT: Transients and Variability Discovered with HST in the JWST North Ecliptic Pole Time-domain Field by O’Brien, Rosalia, Jansen, Rolf A., Grogin, Norman A., Cohen, Seth H., Smith, Brent M., Silver, Ross M., Maksym, W. P., Windhorst, Rogier A., Carleton, Timothy, Koekemoer, Anton M., Hathi, Nimish P., Willmer, Christopher N. A., Frye, Brenda L., Alpaslan, M., Ashby, M. L. N., Ashcraft, T. A., Bonoli, S., Brisken, W., Cappelluti, N., Civano, F., Conselice, C. J., Dhillon, V. S., Driver, S. P., Duncan, K. J., Dupke, R., Elvis, M., Fazio, G. G., Finkelstein, S. L., Gim, H. B., Griffiths, A., Hammel, H. B., Hyun, M., Im, M., Jones, V. R., Kim, D., Ladjelate, B., Larson, R. L., Malhotra, S., Marshall, M. A., Milam, S. N., Pierel, J. D. R., Rhoads, J. E., Rodney, S. A., Röttgering, H. J. A., Rutkowski, M. J., Ryan, R. E., Ward, M. J., White, C. W., van Weeren, R. J., Zhao, X., Summers, J., D’Silva, J. C. J., Ortiz, R., Robotham, A. S. G., Coe, D., Nonino, M., Pirzkal, N., Yan, H., Acharya, T.

“…Abstract The James Webb Space Telescope (JWST) North Ecliptic Pole (NEP) Time-domain Field (TDF) is a >14′ diameter field optimized for multiwavelength…”
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Uranus at equinox: Cloud morphology and dynamics by Sromovsky, L.A., Fry, P.M., Hammel, H.B., Ahue, W.M., de Pater, I., Rages, K.A., Showalter, M.R., van Dam, M.A.

“…As the 7 December 2007 equinox of Uranus approached, collaboration between ring and atmosphere observers in the summer and fall of 2007 produced a substantial…”
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New Dust Belts of Uranus: One Ring, Two Ring, Red Ring, Blue Ring by de Pater, Imke, Hammel, Heidi B., Gibbard, Seran G., Showalter, Mark R.

“…We compared near-infrared observations of the recently discovered outer rings of Uranus with Hubble Space Telescope results. We find that the inner ring,…”
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