Abstract.
Temperature and electron-density profiles in a laser-produced plasma have been measured at various distances from the sample surface and different delay times from the laser pulse. The plasma is produced with a Nd:YAG laser focused on a low-alloy steel sample in air at atmospheric pressure. The determination of the parameters is made starting from the distinct emission spectra emitted by the plasma along a direction parallel to the sample surface and measured simultaneously by a CCD detector. The experimental relative error is 1.5% for temperatures and 4.5% for electron densities. A small spatial variation of the plasma temperature (ΔT≤1000 K) is obtained except for the outer regions, were the intensity is weak. A higher spatial variation is obtained for the electron density, especially at initial times (ΔNe≅1017 cm-3 at t=3 μs).
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Received: 21 July 1999 / Accepted: 1 September 1999 / Published online: 22 December 1999
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Monge, E., Aragón, C. & Aguilera, J. Space- and time-resolved measurements of temperatures and electron densities of plasmas formed during laser ablation of metallic samples . Appl Phys A 69 (Suppl 1), S691–S694 (1999). https://doi.org/10.1007/s003390051507
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DOI: https://doi.org/10.1007/s003390051507