排序方式: 共有13条查询结果,搜索用时 15 毫秒
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Park HS Dewald ED Glenzer S Kalantar DH Kilkenny JD MacGowan BJ Maddox BR Milovich JL Prasad RR Remington BA Robey HF Thomas CA 《The Review of scientific instruments》2010,81(10):10E519
Understanding hot electron distributions generated inside Hohlraums is important to the national ignition campaign for controlling implosion symmetry and sources of preheat. While direct imaging of hot electrons is difficult, their spatial distribution and spectrum can be deduced by detecting high energy x-rays generated as they interact with target materials. We used an array of 18 pinholes with four independent filter combinations to image entire Hohlraums with a magnification of 0.87× during the Hohlraum energetics campaign on NIF. Comparing our results with Hohlraum simulations indicates that the characteristic 10-40 keV hot electrons are mainly generated from backscattered laser-plasma interactions rather than from Hohlraum hydrodynamics. 相似文献
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Structure and conductivity of yttria and scandia‐doped zirconia crystals grown by skull melting
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Mihail A. Borik Sergey I. Bredikhin Vladimir T. Bublik Aleksej V. Kulebyakin Irina E. Kuritsyna Elena E. Lomonova Philipp O. Milovich Valentina A. Myzina Vyacheslav V. Osiko Polina A. Ryabochkina Nataliya Y. Tabachkova 《Journal of the American Ceramic Society》2017,100(12):5536-5547
In this paper a detailed study of the (ZrO2)1‐x(Y2O3)x (x=0.025–0.15), (ZrO2)1‐x(Sc2O3)x (x = 0.06 – 0.11) and (ZrO2)1‐x‐y(Sc2O3)x(Y2O3)y (x=0.07 – 0.11; y=0.01 – 0.04) solid solution crystals grown by skull melting technique is presented. The structure, phase composition, and ion conductivity of the obtained crystals were investigated by X‐ray diffraction, transmission electron microscopy, Raman scattering spectroscopy, and impedance spectroscopy. Maximum conductivity as (ZrO2)1‐x(Y2O3)x and (ZrO2)1‐x(Sc2O3)x solid solution crystals is observed for the compositions containing 10 mol% stabilizing oxide, and the conductivity of 10ScSZ is ~3 times higher than for 10YSZ. Experiments on crystal growth (ZrO2)1‐x‐y(Sc2O3)x(Y2O3)y solid solutions showed that uniform, transparent crystals 7Sc3YSZ, 7Sc4YSZ, 8Sc2YSZ, 8Sc3YSZ, 9Sc2YSZ, 9Sc3YSZ, 10Sc1YSZ, and 10Sc2YSZ are single phase crystal containing t″ phase. It is established that a necessary condition of melt growth of (ZrO2)1‐x‐y(Sc2O3)x(Y2O3)y single‐phase crystals is the total concentration of the stabilizing oxides from 10 to 12 mol%. The addition of Y2O3 affects the (ZrO2)1‐x‐y(Sc2O3)x(Y2O3)y solid solution conductivity different ways and depends on the Sc2O3 content in the starting composition. The effects of structure, phase composition, concentration, and type of stabilizing oxides on the electrical characteristics of obtained crystals are discussed. 相似文献
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L.?D.?IskhakovaEmail author F.?O.?Milovich D.?Yu.?Erin V.?V.?Vel’miskin S.?L.?Semenov 《Glass Physics and Chemistry》2018,44(2):137-144
The phase separation and the emergence of nanocrystalline inclusions in phosphate–silicate preforms for optical fibers activated with ytterbium, which are obtained by the powder sintering methods with the vibrational mixing of the melt and the addition of ytterbium-containing nanoparticles into preforms, are studied. Nanocrystals of YbPO4, SiO2, and YbP3O9 are formed in the preforms in the low-temperature areas of the powder sintering process when using either of the methods. It is concluded that the phosphates are crystallized as a result of the phase separation from the glass phase enriched with ytterbium. 相似文献
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M. A. Borik S. I. Bredikhin V. T. Bublik A. V. Kulebyakin I. E. Kuritsyna E. E. Lomonova F. O. Milovich V. A. Myzina V. V. Osiko S. V. Seryakov N. Yu. Tabachkova 《Technical Physics Letters》2017,43(3):289-292
The interrelationship between the structure, phase composition, and transport characteristics of solid electrolytes based on ZrO2 has been studied as dependent on the content of stabilizing Y2O3 additive. It is established that twin boundaries do not lead to the appearance of additional mechanism of ionic conductivity acceleration in ZrO2–Y2O3 crystals. The maximum conductivity has been observed in ZrO2–(8–10) mol % Y2O3 crystals containing a t” phase, in which oxygen atoms are displaced from high-symmetry positions characteristic of the cubic phase. 相似文献
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M. A. Borik V. T. Bublik M. A. Vishnyakova A. V. Kulebyakin E. E. Lomonova V. A. Myzina F. O. Milovich V. V. Osiko N. Yu. Tabachkova 《Inorganic Materials》2012,48(2):156-160
The structure of partially stabilized zirconia crystals has been studied by transmission electron microscopy before and after
annealing. Structural characterization of Y2O3-doped (2.8 to 4 mol %) zirconia before annealing showed that all of the samples consisted of twin domains whose size was
dependent on the stabilizer content. Annealing at 2100°C increased the domain size in the composition range 2.8–3.7 mol %
Y2O3 and reduced it at 4 mol % Y2O3. These structural changes allowed us to determine the position of the representative point relative to the phase boundary
in the equilibrium phase diagram of the system. 相似文献
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O. V. Artoshina F. O. Milovich A. Rossouw B. L. Gorberg L. D. Iskhakova R. P. Ermakov V. K. Semina Yu. K. Kochnev A. N. Nechaev P. Yu. Apel 《Inorganic Materials》2016,52(9):945-954
We have studied TiO2, Ag, Ag/TiO2, and Cu/TiO2 coatings grown on track-etched polyethylene terephthalate membranes. The metals and oxides were deposited by reactive vacuum sputtering using a planar magnetron. The microstructure of the samples were examined by scanning and transmission electron microscopy techniques. The elemental composition of the coatings were determined by energy dispersive X-ray microanalysis, and their phase composition was determined by X-ray diffraction at different temperatures and by transmission electron diffraction. Titanium dioxide can be present on the surface of track-etched membranes (TMs) in three forms: nanocrystals of tetragonal anatase with orthorhombic brookite and amorphous TiO2 impurities. The copper-metallized TM has been shown to contain cubic Cu2O. The optical properties of the composite membranes and films have been studied by absorption spectroscopy. The energies of direct and indirect allowed optical transitions have been evaluated from measured absorption spectra of the TiO2, Ag/TiO2, and Cu/TiO2 coatings. 相似文献
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Schneider MB Jones OS Meezan NB Milovich JL Town RP Alvarez SS Beeler RG Bradley DK Celeste JR Dixit SN Edwards MJ Haugh MJ Kalantar DH Kline JL Kyrala GA Landen OL MacGowan BJ Michel P Moody JD Oberhelman SK Piston KW Pivovaroff MJ Suter LJ Teruya AT Thomas CA Vernon SP Warrick AL Widmann K Wood RD Young BK 《The Review of scientific instruments》2010,81(10):10E538
The static x-ray imager at the National Ignition Facility is a pinhole camera using a CCD detector to obtain images of Hohlraum wall x-ray drive illumination patterns seen through the laser entrance hole (LEH). Carefully chosen filters, combined with the CCD response, allow recording images in the x-ray range of 3-5 keV with 60?μm spatial resolution. The routines used to obtain the apparent size of the backlit LEH and the location and intensity of beam spots are discussed and compared to predictions. A new soft x-ray channel centered at 870 eV (near the x-ray peak of a 300 eV temperature ignition Hohlraum) is discussed. 相似文献
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Il’in E. G. Parshakov A. S. Fatyushina E. V. Iskhakova L. D. Gryzlov D. Yu. Milovich F. O. 《Inorganic Materials》2022,58(2):190-198
Inorganic Materials - We have developed a new method for the synthesis of a NbC/C nanocomposite (niobium carbide in a fine-particle carbon matrix) via thermal decomposition of solid products of... 相似文献
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Agarkova E. A. Borik M. A. Bublik V. T. Volkova T. V. Kulebyakin A. V. Kuritsyna I. E. Larina N. A. Lomonova E. E. Milovich F. O. Myzina V. A. Ryabochkina P. A. Tabachkova N. Yu. 《Russian Microelectronics》2019,48(8):523-530
Russian Microelectronics - The results of investigating the crystal structure, ionic conductivity, and local structure of the (ZrO2)1 –x(Gd2O3)x and (ZrO2)1 –x(Y2O3)x (x = 0.04, 0.08,... 相似文献