Calculation of Self-Generated Magnetic Fields in Laser-Produced Plasmas
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We develop an interactive procedure for estimating the self-generated magnetic fields in laser-produced plasmas using MATLAB software. We use this procedure for analyzing the digital images recorded employing a three-channel polarointerferometer to estimate the self-generated magnetic fields. The three regions of an image recorded using the three-channel polarointerferometer contain all the required information in the form of Faraday rotation (polarimetry), spatial profile of the incident probe beam (shadowgraphy), and electron-plasma density (interferometry). The computer program displays different portions of the image and allows the user to track the interference fringes interactively and displays the calculated spatial profiles of the electron density and the magnetic fields. Using this program, we estimate magnetic fields of the order of 2–4 MG at electron densities ∼ 1017 cm −3 in an aluminum plasma. The program replaces many calculations that have to be done manually.
Keywordslaser plasma self-generated magnetic fields Abel inversion Faraday effect
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