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90 results on '"Phillips, Mark L."'

1. STROBE-X Mission Overview

Author

Ray, Paul S., Roming, Peter W. A., Argan, Andrea, Arzoumanian, Zaven, Ballantyne, David R., Bogdanov, Slavko, Bonvicini, Valter, Brandt, Terri J., Bursa, Michal, Cackett, Edward M., Chakrabarty, Deepto, Christophersen, Marc, Coderre, Kathleen M., De Geronimo, Gianluigi, Del Monte, Ettore, DeRosa, Alessandra, Dietz, Harley R., Evangelista, Yuri, Feroci, Marco, Ford, Jeremy J., Froning, Cynthia, Fryer, Christopher L., Gendreau, Keith C., Goldstein, Adam, Gonzalez, Anthony H., Hartmann, Dieter, Hernanz, Margarita, Hutcheson, Anthony, Zand, Jean in `t, Jenke, Peter, Kennea, Jamie, Lloyd-Ronning, Nicole M., Maccarone, Thomas J., Maes, Dominic, Markwardt, Craig B., Michalska, Malgorzata, Okajima, Takashi, Patruno, Alessandro, Persyn, Steven C., Phillips, Mark L., Prescod-Weinstein, Chanda, Redfern, Jillian A., Remillard, Ronald A., Santangelo, Andrea, Schwendeman, Carl L., Sleator, Clio, Steiner, James, Strohmayer, Tod E., Svoboda, Jiri, Tenzer, Christoph, Thompson, Steven P., Warwick, Richard W., Watts, Anna L., Wilson-Hodge, Colleen A., Wu, Xin, Wulf, Eric A., and Zampa, Gianluigi

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We give an overview of the science objectives and mission design of the Spectroscopic Time-Resolving Observatory for Broadband Energy X-rays (STROBE-X) observatory, which has been proposed as a NASA probe-class (~$1.5B) mission in response to the Astro2020 recommendation for an X-ray probe., Comment: 11 pages, 5 figures, accepted for publication in JATIS

Published
2024

4. Extreme coronary radiation doses from intravascular brachytherapy

Author

Wallner, Kent, primary, Kearney, Kathleen E., additional, Tiwana, Jasleen, additional, Pristera, Nicole, additional, Kim, Edward Y., additional, Sandison, George, additional, Lombardi, William L., additional, Phillips, Mark L., additional, Don, Creighton, additional, Azzalini, Lorenzo, additional, and Kim, Minsun, additional

Published
2023
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5. A Fluorescent Aerogel for Capture and Identification of Interplanetary and Interstellar Dust

Author

Dominguez, Gerardo, Westphal, Andrew J., Phillips, Mark L. F., and Jones, Steven M.

Subjects
Astrophysics
Abstract

Contemporary interstellar dust has never been analyzed in the laboratory, despite its obvious astronomical importance and its potential as a probe of stellar nucleosynthesis and galactic chemical evolution. Here we report the discovery of a novel fluorescent aerogel which is capable of capturing hypervelocity dust grains and passively recording their kinetic energies. An array of these "calorimetric" aerogel collectors in low earth orbit would lead to the capture and identification of large numbers of interstellar dust grains., Comment: 13 pages, 4 figures, to appear in The Astrophysical Journal

Published
2003
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7. Synthesis and crystal structure of calcium hydrogen phosphite, CaHPO3

Author

Phillips, Mark L. F. and Harrison, William T. A.

Subjects
lcsh:Chemistry, crystal structure, calcium, lcsh:QD1-999, hydrogen phosphite, Research Communications
Abstract

The title compound is built up from CaO7 polyhedra and HPO3 pseudo tetra­hedra sharing corners and edges to generate a three-dimensional network., The hydro­thermal synthesis and crystal structure of the simple inorganic compound CaHPO3, which crystallizes in the chiral space group P43212, are reported. The structure is built up from distorted CaO7 capped trigonal prisms and HPO3 pseudo pyramids, which share corners and edges to generate a three-dimensional network.

Published
2019

9. STROBE-X: capturing the universe in motion

Author

den Herder, Jan-Willem A., Nikzad, Shouleh, Nakazawa, Kazuhiro, Froning, Cynthia S., Roming, Pete, Ray, Paul, Argan, Andrea, Arzoumanian, Zaven, Bogdanov, Slavko, Bonvicini, Valter, Brandt, Terri J., Bursa, Michal, Cackett, Edward M., Chakrabarty, Deepto, Christophersen, Marc, Coderre, Kathleen M., De Geronimo, Gianluigi, Del Monte, Ettore, De Rosa, Alessandra, Dietz, Harley R., Evangelista, Yuri, Feroci, Marco, Ford, Jeremy J., Fryer, Christopher L., Gendreau, Keith C., Goldstein, Adam, Gonzalez, Anthony H., Hernanz, Margarita, Hutcheson, Anthony, in 't Zand, Jean, Jenke, Peter, Kennea, Jamie, Lloyd-Ronning, Nicole, Maccarone, Tom, Maes, Dominic, Markwardt, Craig, Michalska, Malgorzata, Okajima, Takashi, Patruno, Alessandro, Persyn, Steven C., Phillips, Mark L., Prescod-Weinstein, Chanda, Redfern, Jillian A., Remillard, Ronald A., Santangelo, Andrea, Schwendeman, Carl L., Sleator, Clio, Steiner, James F., Strohmayer, Tod E., Svoboda, Jiri, Tenzer, Christoph, Thompson, Steven P., Warwick, Richard W., Watts, Anna L., Wilson-Hodge, Colleen, Wu, Xin, Wulf, Eric A., and Zampa, Gianluigi

Published
2024
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11. New framework connectivity in templated networks: the creatinine zinc phosphites C (sub)4 N (sub)3 OH (sub)7 .ZnHPO (sub)3, C (sub)4 N (sub)3 OH (sub)7 .Zn(H (sub)2 O)HPO (sub)3 and (C (sub)4 N (sub)3 OH (sub)7) (sub)2 .ZnHPO (sub)3 .H (sub)2 O

Author

Harrison, William T. A., Yeates, Rachel M., Phillips, Mark L. F., and Nenoff, Tina M.

Subjects
Chemistry, Inorganic -- Research, Zinc compounds, Phosphorus compounds, Creatine, Inorganic compounds, Chemistry
Abstract

Research has been conducted on creatinine zinc phosphites. The authors report the synthesis, structures and properties of these phosphites, and demonstrate that these compounds are built up from vertex-sharing HPO (sub)3 pseydopyramid and tetrahedra networks.

Published
2003

12. Synthesis and crystal structure of calcium hydrogen phosphite, CaHPO3.

Author

Phillips, Mark L. F. and Harrison, William T. A.

Subjects
*CRYSTAL structure, *CALCIUM, *CALCIUM compounds, *INORGANIC compounds, *HYDROGEN, *SPACE groups
Abstract

The hydro­thermal synthesis and crystal structure of the simple inorganic compound CaHPO3, which crystallizes in the chiral space group P43212, are reported. The structure is built up from distorted CaO7 capped trigonal prisms and HPO3 pseudo pyramids, which share corners and edges to generate a three-dimensional network. [ABSTRACT FROM AUTHOR]

Published
2019
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13. Synthesis and crystal structure of calcium hydrogen phosphite, CaHPO3.

Author

Phillips, Mark L. F. and Harrison, William T. A.

Subjects
CRYSTAL structure, CALCIUM, CALCIUM compounds, INORGANIC compounds, HYDROGEN, SPACE groups
Abstract

The hydro­thermal synthesis and crystal structure of the simple inorganic compound CaHPO3, which crystallizes in the chiral space group P43212, are reported. The structure is built up from distorted CaO7 capped trigonal prisms and HPO3 pseudo pyramids, which share corners and edges to generate a three-dimensional network. [ABSTRACT FROM AUTHOR]

Published
2019
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19. Strofio: A novel neutral mass spectrograph for sampling Mercury's exosphere.

Author

Gurnee, Reid S., Livi, Stefano, Phillips, Mark L., Desai, Mihir I., Hayes, John R., Ho, George C., Hourani, Ramsey, Jaskulek, Stephen, and Scheer, Juergen

Abstract

Strofio is a scientific investigation to sample in-situ the neutral atoms in Mercury's exosphere. Strofio is based on a novel mass spectrograph that determines the particle mass-per-charge (m/q) by a time-of-flight (TOF) technique. This novel technique achieves a mass resolution (m/Δm) at mass 18 of >100, with a high sensitivity of 0.14 (counts/s)/(particles/cm3) and a mass of only 4kg. Strofio employs a rotating electric field to “stamp” the start time of the incoming ionized particles and a micro-channel plate (MCP) detector to record the stop time and position. This eliminates the need for foils or shutters, resulting in nearly 100% duty cycle and a low mass design. Strofio is funded by NASA to fly on the European Space Agency mission BepiColombo to the planet Mercury. It is part of the four instrument SERENA suite situated on the Mercury Planetary Orbiter (MPO), which will enter in a 400 × 1500km polar orbit. This paper describes the theory of operation, the instrument components, and focuses on the front end electronics and processing required to read and accumulate the particle data. [ABSTRACT FROM PUBLISHER]

Published
2012
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47. Variations on the (3,4)-Net Motif in Organo-Zincophosphite Chemistry: Syntheses and Structures of (CN3H6)2·Zn3(HPO3)4·H2O and H3N(CH2)3NH3·Zn3(HPO3)4·H2O

Author

Phillips, Mark L. F., Nenoff, Tina M., Thompson, Christopher T., and Harrison, William T. A.

Subjects
*ORGANIC synthesis, *ORGANIC chemistry
Abstract

The solution-mediated syntheses and single-crystal structures of (CN3H6)2·Zn3(HPO3)4·H2O (I) and H3N(CH2)3NH3·Zn3(HPO3)4·H2O (II) are reported. These phases contain networks of vertex-sharing ZnO4 tetrahedra and HPO3 pseudopyramids accompanied by organic cations and water molecules. Despite their similar formulae, these phases adopt different crystal structures, in terms of three-dimensional and two-dimensional ZnO4∣HPO3 networks, for I and II, respectively. Their similarities and differences to other zinc phosphites and phosphates are briefly discussed. Crystal data: (CN3H6)2·Zn3(HPO3)4·H2O, Mr=654.23, triclinic, P1 (No. 2), a=7.5121 (3) A˚, b=8.9927 (4) A˚, c=15.1530 (6) A˚, α=90.256 (1)°, β=93.391 (1)°, γ=111.091 (1)°, V=953.04 (7) A˚3, Z=2, R(F)=0.048, wR(F2)=0.121. H3N(CH2)3NH3·Zn3(HPO3)4·H2O, Mr=610.22, monoclinic, C2/c (No. 15), a=8.9310 (4) A˚, b=14.4308 (6) A˚, c=14.3669 (6) A˚, β=104.624 (1)°, V=1791.64 (13) A˚3, Z=4, R(F)=0.033, wR(F2)=0.087. [Copyright &y& Elsevier]

Published
2002
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48. A Sintering Study of Novel Sol–Gel-Based Nanocluster Catalysts

Author

Martino, Anthony, Sault, Allen G., Kawola, Jeffrey S., Boespflug, Elaine, and Phillips, Mark L. F.

Abstract

We introduce two novel synthesis strategies to make nanoclusters on silica and alumina supports using inverse micelle technology and sol–gel processing. In the first method, sol–gel chemistry (hydrolysis and condensation of metal alkoxides) is performed in alcohol-free inverse micelle, metal cluster solutions. In the second method, metal clusters formed in traditional inverse micelle solutions are allowed to diffuse into preexisting wet monoliths formed using traditional sol–gel techniques. The different materials produced are characterized and compared with respect to particle size and the substrate properties using N2 porosimetry methods, chemisorption, atomic absorption, and transmission electron microscopy. The effect of calcination on particle and support stability is determined and discussed in terms of the metal coverage and the relationship between particle size and pore dimensions. We conclude that the relative sizes of particles and pores has no clear effect on sintering behavior. Sintering appears to be predominately dependent on metal loading normalized against the support surface area suggesting Ostwald ripening as the sintering mechanism.

Published
1999
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50. Inclusion Tuning of Nonlinear Optical Materials: KTP (Potassium Titanyl Phosphate) Isomorphs

Author

CALIFORNIA UNIV SANTA BARBARA DEPT OF CHEMISTRY, Phillips, Mark L., Gier, Thurman E., Eddy, Michael M., Keder, Nancy L., Stucky, Galen D., Bierlein, John D., CALIFORNIA UNIV SANTA BARBARA DEPT OF CHEMISTRY, Phillips, Mark L., Gier, Thurman E., Eddy, Michael M., Keder, Nancy L., Stucky, Galen D., and Bierlein, John D.

Abstract

KTiOPO4 or KTP has shown itself to be a premier material for optical second harmonic generation, or SHG. Cations ranging in size from Ag+ to Cs+ can be partially or completely exchanged for Kt, altering the structure and changing the reactivity and SHG coefficient of the material. In particular, partial deammoniation of NH4TiOPO4 results in changes in the Ti-O bond lengths and a dramatic reduction in SHG. Many isomorphic derivatives of KTP have been made in which 3- and 4- valent transition and main group metals are substituted for Ti, balancing charge by substituting Fu or OH for oxide in the Ti-O chain. Guest and host modification can be used to define nonlinear optic properties over a wide range. Keywords: Electrooptic, Site selection, Inclusion, Potassium titanyl phosphate, Silver titanyl phosphate, Nonlinear optic., Presented at the International Symposium on the Reactivity of Solids (11th), Princeton, NJ. Jun 1988.

Published
1988

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