Superfluidité excitonique dans Cu2O

1993 ◽  
Vol 71 (3-4) ◽  
pp. 165-167 ◽  
Author(s):  
A. Mysyrowicz ◽  
E. Fortin
Keyword(s):  
Low Temperature ◽  
Transit Time ◽  
Velocity Dispersion ◽  
Particle Density ◽  
Photovoltaic Effect ◽  
High Particle ◽  
Sudden Reduction ◽  
High Particle Density

The transit time of excitons through several millimeters of Cu2O is measured by the photovoltaic effect. A sudden reduction of velocity dispersion at high particle density and low temperature is attributed to superfluid excitonic motion.

High-Particle-Density YAG:Ce Phosphor Coating for High Power Laser Lighting

2020 ◽  
Vol 142 (3) ◽  
Author(s):  
Yi Yang ◽  
Tao Long ◽  
Songlin Zhuang ◽  
Lai Wang ◽  
Yi Luo
Keyword(s):  
Single Crystal ◽  
Power Density ◽  
Yttrium Aluminum Garnet ◽  
Particle Density ◽  
Spreading Effect ◽  
Central Intensity ◽  
High Particle ◽  
Al2o3 Composite ◽  
Phosphor Coating ◽  
High Particle Density

Abstract Inorganic Ce doped yttrium aluminum garnet (YAG:Ce) fluorescent plates based on various manufacturing methods have been studied in recent years for laser lighting systems. A laser lighting optical system is designed to generate high central intensity beam, and light spreading effect for both YAG single crystal and YAG/Al2O3 composite is investigated. YAG single crystal and YAG/Al2O3 composite lose 50.8% and 25.9% of their light power from central pumping area, respectively, resulting in proportional decrease in central intensity. To solve this problem, a low-cost YAG:Ce high-particle-density phosphor coating (HPD-PC) was prepared for Etendue-limited applications. With only 8.5% of light spreading, under 47.7 W/mm2 pumping power density, YAG HPD-PC emits 1880 lm with the conversion efficiency of 157 lm/W. YAG HPD-PC also could work well under power density more than 100 W/mm2.

scholarly journals Assembly along lines in boundary-driven dynamical system

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Kulveer Singh ◽  
Yitzhak Rabin
Keyword(s):  
Dynamical System ◽  
Particle Density ◽  
Outer Boundary ◽  
Nearest Neighbors ◽  
Three Dimensions ◽  
Single Line ◽  
Repeated Application ◽  
High Particle ◽  
Local Assembly ◽  
High Particle Density

AbstractWe introduce a simple dynamical rule in which each particle locates a particle that is farthest from it and moves towards it. Repeated application of this algorithm results in the formation of unusual dynamical patterns: during the process of assembly the system self-organizes into slices of low particle density separated by lines of increasingly high particle density along which most particles move. As the process proceeds, pairs of lines meet and merge with each other until a single line remains and particles move along it towards the zone of assembly. We show that this pattern is governed by particles (attractors) situated on the instantaneous outer boundary of the system and that both in two and in three dimensions the lines are formed by zigzag motion of a particle towards a pair of nearly equidistant attractors. This novel line-dominated assembly is very different from the local assembly in which particles that move towards their nearest neighbors produce point-like clusters that coalesce into new point-like clusters, etc.

Two-dimensional model for strongly interacting matter at high particle density

1986 ◽  
Vol 177 (3-4) ◽  
pp. 391-394 ◽  
Author(s):  
H. Gausterer ◽  
J.R. Klauder
Keyword(s):  
Particle Density ◽  
Two Dimensional ◽  
Dimensional Model ◽  
High Particle ◽  
Strongly Interacting ◽  
Two Dimensional Model ◽  
High Particle Density

High-particle-density flowmetry by use of a SLD

1990 ◽  
Author(s):  
Yoh Imai ◽  
Hiroshi Fujii
Keyword(s):  
Particle Density ◽  
High Particle ◽  
High Particle Density

3D localization of high particle density images using sparse recovery

2015 ◽  
Vol 54 (26) ◽  
pp. 7859 ◽  
Author(s):  
Saiwen Zhang ◽  
Danni Chen ◽  
Hanben Niu
Keyword(s):  
Particle Density ◽  
Sparse Recovery ◽  
High Particle ◽  
3D Localization ◽  
High Particle Density

Silicon drift detectors in high particle density environment

1998 ◽  
Vol 48 (S1) ◽  
pp. 87-96 ◽  
Author(s):  
Vojtěch Petráček
Keyword(s):  
Particle Density ◽  
High Particle ◽  
Silicon Drift Detectors ◽  
High Particle Density
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