An ELF Radiation Model for Estimating the Transient Electric Behavior of Space Units

2020 ◽  
Author(s):  
Christos D. Nikolopoulos ◽  
Anargyros T. Baklezos ◽  
Marco Nicoletto ◽  
Illario Marziali ◽  
Demis Boschetti ◽  
...  
Keyword(s):  
Radiation Model ◽  
Electric Behavior

Residual Dust and Radiation Model (REDRAM), Model Description

1988 ◽  
Author(s):  
A. T. Hopkins ◽  
Darrell L. Palmer ◽  
Jeffrey R. Brown
Keyword(s):  
Model Description ◽  
Radiation Model

scholarly journals A New Approach for Approximate Solution of ADE: Physical-Based Modeling of Carriers in Doping Region

Mathematics ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 458
Author(s):  
Leobardo Hernandez-Gonzalez ◽  
Jazmin Ramirez-Hernandez ◽  
Oswaldo Ulises Juarez-Sandoval ◽  
Miguel Angel Olivares-Robles ◽  
Ramon Blanco Sanchez ◽  
...  
Keyword(s):  
Differential Equation ◽  
Approximate Solution ◽  
Analytic Solution ◽  
Order Differential Equation ◽  
Electric Circuit ◽  
New Approach ◽  
In Doping ◽  
Electric Behavior ◽  
Spatio Temporal ◽  
Physical Phenomena

The electric behavior in semiconductor devices is the result of the electric carriers’ injection and evacuation in the low doping region, N-. The carrier’s dynamic is determined by the ambipolar diffusion equation (ADE), which involves the main physical phenomena in the low doping region. The ADE does not have a direct analytic solution since it is a spatio-temporal second-order differential equation. The numerical solution is the most used, but is inadequate to be integrated into commercial electric circuit simulators. In this paper, an empiric approximation is proposed as the solution of the ADE. The proposed solution was validated using the final equations that were implemented in a simulator; the results were compared with the experimental results in each phase, obtaining a similarity in the current waveforms. Finally, an advantage of the proposed methodology is that the final expressions obtained can be easily implemented in commercial simulators.

Effects of radiation model on the modeling of a laminar coflow methane/air diffusion flame

2004 ◽  
Vol 138 (1-2) ◽  
pp. 136-154 ◽  
Author(s):  
Fengshan Liu ◽  
Hongsheng Guo ◽  
Gregory J. Smallwood
Keyword(s):  
Diffusion Flame ◽  
Radiation Model ◽  
Effects Of Radiation ◽  
Air Diffusion

PARMA: PHITS-based Analytical Radiation Model in the Atmosphere—Verification of Its Accuracy in Estimating Cosmic Radiation Doses

2008 ◽  
Author(s):  
Tatsuhiko Sato ◽  
Hiroshi Yasuda ◽  
Masashi Takada ◽  
Takashi Nakamura ◽  
Daiki Satoh ◽  
...  
Keyword(s):  
Cosmic Radiation ◽  
Radiation Doses ◽  
Radiation Model

scholarly journals Simulation and Optimization of a Carbon Nanotube Electron Source

2015 ◽  
Vol 21 (S4) ◽  
pp. 60-65 ◽  
Author(s):  
Alexandr Knápek ◽  
Tomáš Radlička ◽  
Stanislav Krátký
Keyword(s):  
Carbon Nanotube ◽  
Electron Beam Lithography ◽  
Fabrication Method ◽  
Vertically Aligned Carbon Nanotubes ◽  
Simulation And Optimization ◽  
Gate Structure ◽  
Aligned Carbon Nanotubes ◽  
Electric Behavior ◽  
Vertically Aligned ◽  
Structure Calculations

AbstractThis paper deals with an optimization of a field-emission structure concept based on vertically aligned carbon nanotubes (CNT). A design concept for a fabrication method for a gate structure based on electron beam lithography is reviewed in the first part of the paper. A single carbon nanotube is grown by the PECVD method inside the gate structure. Calculations and simulations that help determine gate structure proportions in order to obtain the best possible electron reduced brightness and to predict the cathode's electric behavior are also essential parts of this study.

Radiation Model for Terahertz Transmission-Line Metamaterial Quantum-Cascade Lasers

2012 ◽  
Vol 2 (3) ◽  
pp. 323-332 ◽  
Author(s):  
Philip W. C. Hon ◽  
Amir A. Tavallaee ◽  
Qi-Sheng Chen ◽  
Benjamin S. Williams ◽  
Tatsuo Itoh
Keyword(s):  
Transmission Line ◽  
Quantum Cascade Lasers ◽  
Radiation Model ◽  
Quantum Cascade ◽  
Terahertz Transmission ◽  
Cascade Lasers

The structural and electric behavior of SrBi2Ta2O9 ferroelectric thin films with H+ implantation

1999 ◽  
Vol 251 (5) ◽  
pp. 336-339 ◽  
Author(s):  
Jianming Zeng ◽  
Lirong Zheng ◽  
Chenglu Lin ◽  
M. Alexe ◽  
A. Pignolet ◽  
...  
Keyword(s):  
Thin Films ◽  
Ferroelectric Thin Films ◽  
Electric Behavior

scholarly journals Radiation model of a xenon flash lamp in a laser amplifier pump cavity

2015 ◽  
Vol 3 ◽  
Author(s):  
Yongzhong Wu ◽  
Jianqiang Zhu ◽  
Zhixiang Zhang ◽  
Yangshuai Li
Keyword(s):  
Absorption Coefficient ◽  
Gain Coefficient ◽  
Flash Lamp ◽  
Laser Amplifier ◽  
Radiation Model ◽  
Test Technique ◽  
Xenon Flash Lamp ◽  
Simplifying Assumptions ◽  
Plasma Absorption ◽  
Xenon Flash

Understanding the radiation model of a flash lamp is essential for the reflector design of a laser amplifier. Reflector design often involves several simplifying assumptions, like a point or Lambertian source; either of these assumptions may lead to significant errors in the output distribution. In practice, source non-idealities usually result in sacrificing the amplifier’s gain coefficient. We propose a novel test technique for attaining the xenon flash lamp absolute spectral intensity at various angles of view, and then accurately predict radiation distributions and generate the reflector shape. It is shown that due to the absorption of emitted radiation by the lamp itself, the behavior of the radiation model at various wavelengths is different. Numerical results of xenon plasma absorption coefficient were compared with the measured data. A reasonable agreement was obtained for the absorption coefficient parameters. Thus, this work provides a useful analytical tool for the engineering design of laser amplifier reflectors using xenon flash lamps as pumps.

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