Simulation of Ionization{front Propagation in Dense Plasma by Markoo Automata

نویسندگان

  • Dieter Beule
  • Thomas Fricke
چکیده

Front propagation in partially ionized dense plasma is described by reaction{diiusion equations. We introduce the new method of Markoo automata for the stochastic simulation of reaction and diiusion in dense plasma which is capable to perform simulations fast and accurate. The method is applied to the investigation of ionization fronts of diierent shape. A comparison with analytic results for proole and velocity of plane fronts connrms the stochastic simulation data. Furthermore , we present data for an expanding ionization spot. Zusammenfassung Die Frontausbreitung in teilweise ionisiertem dichtem Plasma wird durch Reaktions{Diiusions{Gleichungen beschrieben. Wir f uhren eine neue Methode zur stochastischen Simulation der Reaktionen und der Diiusion in dichtem Plasma ein, die wir Markoo{Automaten nennen. Damit sind wir in der Lage, schnelle und sehr genaue Simulationen durchzuf uhren. Wir wenden die Methode auf die Untersuchung von Ionisationsfronten ver-schiedener Form an. Ein Vergleich mit analytischen Resul-taten f ur das Prool und die Geschwindigkeit von ebenen Fron-ten bestt atigt die Daten der stochastischen Simulation. Weiterhin prr asentieren wir Daten f ur einen expandierenden Ionisationsseck.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Tunneling-assisted impact ionization fronts in semiconductors

We discuss a type of ionization front in layered semiconductor structures. The propagation is due to the interplay of band-to-band tunneling and impact ionization. Our numerical simulations show that the front can be triggered when an extremely sharp voltage ramp (;10 kV/ns) is applied in reverse direction to a Si p – n – n structure that is connected in series with an external load. The trigge...

متن کامل

Modelling, Analysis and Simulation Tunneling-assisted impact ionization fronts in semiconductors

We propose a novel type of ionization front in layered semi ondu tor stru tures. The propagation is due to the interplay of band-to-band tunneling and impa t ionization. Our numeri al simulations show that the front an be triggered when an extremely sharp voltage ramp ( 10 kV=ns ) is applied in reverse dire tion to a Si p n n stru ture that is onne ted in series with an external load. The trigg...

متن کامل

Implication of Quantum Effects on Non-Linear Propagation of Electron Plasma Solitons

We have studied the electron exchange-correlation effect on thecharacteristics of the two-component unmagnetized dense quantum plasma withstreaming motion. For this purpose, we have used the quantum hydrodynamic model(including the effects of a quantum statistical Fermi electron temperature) for studyingthe propagation of an electrostatic electron plasma waves in such th...

متن کامل

A two dimensional Simulation of crack propagation using Adaptive Finite Element Analysis

Finite element method (FEM) is one of the most famous methods which has many applications in varies studies such as the study of crack propagation in engineering structures. However, unless extremely fine meshes are employed, problem arises in accurately modelling the singular stress field in the singular element area around the crack tip. In the present study, the crack growth simulation has b...

متن کامل

شبیه‌سازی ذره‌ای شتاب دادن الکترون‌ها در پلاسمای کم چگال

One of the interesting Laser-Plasma phenomena, when the laser power is high and ultra intense, is the generation of large amplitude plasma waves (Wakefield) and electron acceleration. An intense electromagnetic laser pulse can create plasma oscillations through the action of the nonlinear pondermotive force. electrons trapped in the wake can be accelerated to high energies, more than 1 TW. Of t...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2007