Interferometry of plasmas from laser interaction with a gas-jet target including non-axisymmetric density distributions.
underline De Luca A., Baffigi F., Brandi, De Nicola S., Fedele R., Ferrara P., Fulgentini L., Gizzi L.A, Koester P.M, Labate L.
II - Fisica della materia
Aula D3 - Martedì 23 h 09:00 - 13:00
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Gas-jets are widely used as targets of focused ultraintense lasers for electron and ion acceleration. Laser interferometry is a key technique to measure atom density distribution of the gas-jet and electron density in the laser irradiated region. In the latter case, a plasma column is generated and standard Abel inversion (AI) is used to extract the electron density. We discuss the assumption of the axial symmetry and possible extensions to non-symmetric distributions. A description of the experimental measurements is also given with a special attention to the case of supersonic gas-jets used in the laser-wakefield acceleration experiments currently in progress.