Dynamics of antiproton plasma in a timedependent harmonic trap

• Autor(a) principal: Soares, Luiz Gustavo Ferreira
• Data de Publicação: 2021
• Outros Autores: Haas, Fernando
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/247679
• topic: Plasma; Antiprotons; Dinâmica não-linear

An antiproton plasma confined in a quasi-1D device is described in terms of a self-consistent fluid formulation using a variational approach. Unlike previous treatments, the use of the time-dependent variational method allows to retain the thermal and Coulomb effects. A certain Ansatz is proposed for the number density and fluid velocity fields, which reduces the problem essentially to ordinary nonlinear differential equations. In adiabatic cooling, the frequency of the trap potential is slowly decreased. An adiabatic equation of state is assumed for closure. The numerical simulation of the nonlinear dynamics is performed for realistic parameters.