The interaction of a relativistic electron with a dense plasma is studied in the context of inertial fusion fast ignition. Expressions for the electron stopping power and deflection are given and implemented in a three-dimensional (3D) Monte Carlo code. Electron range and penetration depth are computed as functions of the electron energy and plasma parameters; approximate expressions are also proposed. Conditions for fast ignition are studied by including the 3D Monte Carlo code in a 2D hydrodynamic code. The required beam energy is determined as a function of mean electron energy for monoenergetic and exponential energy distributions and a uniform initial deuterium–tritium plasma with a density of 300 g cm^(−3). A simple model is shown to agree with the code.
Stopping and scattering of relativistic electron beams in dense plasmas and requirements for fast ignition / Atzeni, Stefano; Schiavi, Angelo; J. R., Davies. - In: PLASMA PHYSICS AND CONTROLLED FUSION. - ISSN 0741-3335. - STAMPA. - 51:(2009), p. 015016. [10.1088/0741-3335/51/1/015016]
Stopping and scattering of relativistic electron beams in dense plasmas and requirements for fast ignition
ATZENI, Stefano;SCHIAVI, ANGELO;
2009
Abstract
The interaction of a relativistic electron with a dense plasma is studied in the context of inertial fusion fast ignition. Expressions for the electron stopping power and deflection are given and implemented in a three-dimensional (3D) Monte Carlo code. Electron range and penetration depth are computed as functions of the electron energy and plasma parameters; approximate expressions are also proposed. Conditions for fast ignition are studied by including the 3D Monte Carlo code in a 2D hydrodynamic code. The required beam energy is determined as a function of mean electron energy for monoenergetic and exponential energy distributions and a uniform initial deuterium–tritium plasma with a density of 300 g cm^(−3). A simple model is shown to agree with the code.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.