# Magnitude drift

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• CONTEXTO : Segundo ciclo universitário
• AREA: Física
• DISCIPLINA: Física e Tecnologia dos Plasmas
• ANO: 4
• LINGUA: en
• AUTOR: Vasco Guerra
• MATERIA PRINCIPAL: Debye shielding and fundamental efects
• DESCRICAO:
(F. F. Chen ~2.7) An electron beam with density $$n_e=10^{14}$$ m$$^{-3}$$ and radius $$R=1$$ cm crosses a region with a uniform magnetic field \vec{B}=B_0\vec{u}_z)\, where \(B_0=2)\ T and the \(zz)\ axis is aligned with the direction of propagation of the beam. Determine the direction and magnitude of the \(\vec{E}\times\vec{B} drift at $$r=R$$ (note that $$\vec{E}$$ is the electrostatic field created by the charge of the beam).