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- DissertaçãoRadiação síncrotron coerente em aceleradores de laboratório e sua aplicação na interpretação do duplo espectro em explosões solaresCruz, Wellington Luiz da (2016-02-20)
Escola de Engenharia Mackenzie (EE)Recent observations of solar flares at high-frequencies have provided evidence of a new spectral component with fluxes increasing with frequency in the sub-THz to THz range. This new component occurs simultaneously but is separated from the well-known microwave spectral component that maximizes at frequencies of a few to tens of GHz. The aim of this work is to study in detail a mechanism recently suggested to describe the double spectrum observed in solar flares based on the physical process known as microbunching instability, which occurs with high-energy electron beams in laboratory accelerators. Such a process is responsible for the production of synchrotron radiation with a double spectrum similar to that observed in solar flares, showing a broadband coherent synchrotron radiation component (CSR) and a distinct incoherent synchrotron radiation component (ISR) with maximum at higher frequencies.