Estudos dos processos de ionização em um laser de N2: Teoria e experimentação.

• Ano de defesa: 2010
• Autor(a) principal: Silva, Reginaldo Rocha da
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Programa de Pós-graduação em Física; Física
• Palavras-chave em Português: Laser; Nitrogênio; Ionização; Experiência; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA
• Link de acesso: https://app.uff.br/riuff/handle/1/17356

In this work an experimental and theoretical study on the pre-ionization mechanisms in nitrogen molecular lasers produced by ionizing radiation. In a first step an experimental study over the influence of a bias ionization, generated by the introduction of equally spaced distribution of [alfa]-particle emitters (241Am) on the laser discharge channel. In this step, it has been performed an analysis, for a specific wedge electrode configuration, on the laser radiation peak power and temporal width of radiation pulse, for different gas pressures. Measures of these two magnitudes have been performed without [alfa]-particle emitters and with [alfa]-particle emitters in the laser discharge channel. In a second step a rate equations theoretical model is presented, in order to simulate the radiation pulses and seek an explanation for the alpha particle bias ionization effects in the molecular nitrogen laser pulse. Simulations performed through a simple model fits the experimental peak power and temporal width of radiation pulse in different configurations in extremely satisfactory way.