Results 31 to 40 of about 108,367 (319)

C+O detonations in thermonuclear supernovae: Interaction with previously burned material [PDF]

, 2006
In the context of explosion models for Type Ia Supernovae, we present one- and two-dimensional simulations of fully resolved detonation fronts in degenerate C+O White Dwarf matter including clumps of previously burned material. The ability of detonations
A. Maier, Colella, Colella, Fryxell, Gamezo, Golombek, J. C. Niemeyer, Khokhlov, Kozma, Leonard, Mazzali, Meshkov, Niemeyer, Niemeyer, Richtmyer, Sharpe, Timmes, Timmes, Timmes, Timmes, Zingale   +20 more
core   +2 more sources

A Submicrosecond-Response Ultrafast Microwave Ranging Method Based on Optically Generated Frequency-Modulated Pulses

Sensors
An ultrafast microwave ranging method based on optically generated frequency-modulated microwave pulses is proposed in this study. The theoretical analysis demonstrated that nanosecond-scale linear frequency modulation microwave pulse can be obtained by ...
Yifei Sun, Yongchao Chen, Longhuang Tang, Xing Jia, Heli Ma, Xiang Wang, Long Chen, Shenggang Liu, Tianjiong Tao, Jian Wu, Chengjun Li, Shuanyu Liu, Weilu Chen, Wei Gu, Jia Shi, Jidong Weng   +15 more
doaj   +1 more source

Initiation of the detonation in the gravitationally confined detonation model of Type Ia supernovae

, 2009
We study the initiation of the detonation in the gravitationally confined detonation (GCD) model of Type Ia supernovae (SNe Ia). Initiation of the detonation occurs spontaneously in a region where the length scale of the temperature gradient extending ...
Blinnikov, Blinnikov, Bravo, Bravo, Calder, Casey A. Meakin, Don Q. Lamb, Dursi, Gamezo, Höflich, Ivo R. Seitenzahl, James W. Truran, Jordan, Khokhlov, Khokhlov, Knystautas, Kuhlen, Livne, Livne, Meakin, Niemeyer, Plewa, Plewa, Röpke, Seitenzahl, Townsley, Yoon, Zhang   +27 more
core   +1 more source

Off-center ignition in type Ia supernova: I. Initial evolution and implications for delayed detonation [PDF]

, 2006
The explosion of a carbon-oxygen white dwarf as a Type Ia supernova is known to be sensitive to the manner in which the burning is ignited. Studies of the pre-supernova evolution suggest asymmetric, off-center ignition, and here we explore its ...
Hillebrandt, W., Roepke, F. K., Woosley, S. E.   +2 more
core   +2 more sources

Upconversion Photonic Doppler Velocimetry Based on Stimulated Brillouin Scattering

Photonics
Optical up-conversion photonic Doppler velocimetry (PDV) based on stimulated Brillouin Scattering (SBS) with an all-fiber link structure is proposed in this article. Because SBS limits the laser power transmitted by a fiber over long distances, the probe
Long Chen, Cangli Liu, Heli Ma, Longhuang Tang, Xing Jia, Tianjiong Tao, Shenggang Liu, Yongchao Chen, Xiang Wang, Jian Wu, Chengjun Li, Jidong Weng   +11 more
doaj   +1 more source

Detonation front curvatures and detonation rates [PDF]

AIP Conference Proceedings, 2017
Many detonation front curvatures are reviewed. Most are of the Shock Dynamics type, which are described as a combination of quadratic and 8th power-of-the-radius curves. The integrated fraction of the 8th power curve is taken as a measure of curvature, which we are able to relate to the logarithm of the detonation rate.
Lisa M. Lauderbach, K. Thomas Lorenz, Edward L. Lee, P. Clark Souers   +3 more
openaire   +1 more source

Measurement of Ultra-High Speed by Optical Multistage Cascade Frequency Reduction Technology

Applied Sciences
In order to reduce the frequency of high-frequency Doppler signal light, the electronic bandwidth of a data acquisition system is reduced. This paper mainly describes the principle and experimental verification results of optical multistage cascade ...
Heli Ma, Long Chen, Wei Gu, Cangli Liu, Longhuang Tang, Xing Jia, Tianjiong Tao, Shenggang Liu, Yongchao Chen, Xiang Wang, Jian Wu, Chengjun Li, Dameng Liu, Jidong Weng, Huan Liu   +14 more
doaj   +1 more source

Predicted reentrant melting of dense hydrogen at ultra-high pressures

Scientific Reports, 2016
The phase diagram of hydrogen is one of the most important challenges in high-pressure physics and astrophysics. Especially, the melting of dense hydrogen is complicated by dimer dissociation, metallization and nuclear quantum effect of protons, which ...
Hua Y. Geng, Q. Wu
doaj   +1 more source

Delay Times and Rates for Type Ia Supernovae and Thermonuclear Explosions from Double-detonation Sub-Chandrasekhar Mass Models [PDF]

, 2011
We present theoretical delay times and rates of thermonuclear explosions that are thought to produce Type Ia supernovae, including the double-detonation sub-Chandrasekhar mass model, using the population synthesis binary evolution code StarTrack.
A. J. Ruiter, Abdikamalov, Belczynski, Belczynski, Belczynski, Bildsten, Bogomazov, Branch, Brandt, C. L. Fryer, Cappellaro, Clayton, Darbha, De Donder, de Kool, De Marco, Dessart, Dessart, Eldridge, Fink, Fryer, Fryer, Gilfanov, Greggio, Guillochon, Hamuy, Hayden, Hoeflich, Horiuchi, Hurley, Iben, Iben, Iben, Iben, Ivanova, K. Belczynski, Kato, Kato, Kawai, Kenyon, Kromer, Kromer, Leonard, Li, Li, Livne, Livne, M. Fink, M. Kromer, Mannucci, Maoz, Maoz, Maoz, Meng, Metzger, Miyaji, Nelemans, Nelemans, Nelemans, Nelemans, Nomoto, Nomoto, Nugent, Pakmor, Pakmor, Piersanti, Piersanti, Piro, Prialnik, Pritchet, Regös, Roelofs, Ruiter, Ruiter, S. A. Sim, Saio, Scannapieco, Seitenzahl, Shen, Shigeyama, Sim, Solheim, Taam, Totani, Tout, Tutukov, van der Sluys, van Kerkwijk, W. Hillebrandt, Wang, Wang, Webbink, Whelan, Woosley, Yoon, Yoon, Yoon, Yungelson, Yungelson, Yungelson, Yungelson, Yungelson, Yungelson, Zorotovic   +103 more
core   +2 more sources

Study on the Influence of Initiation Model on the Forming Characteristics of MEFP Warhead

Shock and Vibration, 2021
To study the influence of different initiation modes on the forming characteristics of the MEFP warhead, numerical simulations were carried out on three types of initiation modes.
Guangsong Ma, Guanglin He, Zenghui Qiao, Yulong Zhang   +3 more
doaj   +1 more source