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Title: Laser-generated plasmas at INFN-LNS

Abstract

Hot plasmas can be generated by fast and intense laser pulses ablating solids placed in vacuum. A Nd:Yag laser operating at the fundamental and second harmonics with 9-ns pulses (maximum energy of 900 mJ) focused on metallic surfaces produces high ablation yields of the order of {mu}g/pulse and dense plasma that expands adiabatically at supersonic velocity along the normal to the target surface. The plasma emits neutral and charged particles. Charge states up to 10+ have been measured in heavy elements ablated with intensities of the order of 10{sup 10} W/cm{sup 2}. The ion temperature of the plasma is evaluated from the ion energy distributions measured with an ion energy analyzer. The electron temperature is measured through Faraday cups placed at the end of long drift tubes by using time-of-flight technique. The neutral temperature is measured with a special mass quadrupole spectrometer placed along the normal to the target surface. The plasma temperature increases with the laser pulse intensity. The ion temperature reaches values of the order of 400 eV, the electron temperature is of the order of 1 keV for hot electrons and 0.1 eV for thermal electrons, and the neutral temperature is of the order of 200 eV.more » The experimental apparatus, the diagnostic techniques, and the procedures for the plasma temperature characterization will be presented and discussed in detail.« less

Authors:
; ;  [1]; ;  [2];  [3]
  1. INFN-Laboratori Nazionali del Sud (Italy)
  2. Academy Science, Physics Institute (Czech Republic)
  3. Institute of Plasma Physics and Laser Microfusion (Poland)
Publication Date:
OSTI Identifier:
21080598
Resource Type:
Journal Article
Journal Name:
Plasma Physics Reports
Additional Journal Information:
Journal Volume: 32; Journal Issue: 6; Other Information: DOI: 10.1134/S1063780X06060080; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-780X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHARGE STATES; DIAGNOSTIC TECHNIQUES; DRIFT TUBES; ELECTRON TEMPERATURE; ELECTRONS; ENERGY SPECTRA; EV RANGE; FARADAY CUPS; HARMONICS; HOT PLASMA; ION TEMPERATURE; IONS; KEV RANGE; NEODYMIUM LASERS; PULSES; QUADRUPOLES; SPECTROMETERS; SURFACES; TIME-OF-FLIGHT METHOD

Citation Formats

Torrisi, L, Gammino, S, Celona, L, Krasa, J, Laska, L, and Wolowski, J. Laser-generated plasmas at INFN-LNS. United States: N. p., 2006. Web. doi:10.1134/S1063780X06060080.
Torrisi, L, Gammino, S, Celona, L, Krasa, J, Laska, L, & Wolowski, J. Laser-generated plasmas at INFN-LNS. United States. https://doi.org/10.1134/S1063780X06060080
Torrisi, L, Gammino, S, Celona, L, Krasa, J, Laska, L, and Wolowski, J. Thu . "Laser-generated plasmas at INFN-LNS". United States. https://doi.org/10.1134/S1063780X06060080.
@article{osti_21080598,
title = {Laser-generated plasmas at INFN-LNS},
author = {Torrisi, L and Gammino, S and Celona, L and Krasa, J and Laska, L and Wolowski, J},
abstractNote = {Hot plasmas can be generated by fast and intense laser pulses ablating solids placed in vacuum. A Nd:Yag laser operating at the fundamental and second harmonics with 9-ns pulses (maximum energy of 900 mJ) focused on metallic surfaces produces high ablation yields of the order of {mu}g/pulse and dense plasma that expands adiabatically at supersonic velocity along the normal to the target surface. The plasma emits neutral and charged particles. Charge states up to 10+ have been measured in heavy elements ablated with intensities of the order of 10{sup 10} W/cm{sup 2}. The ion temperature of the plasma is evaluated from the ion energy distributions measured with an ion energy analyzer. The electron temperature is measured through Faraday cups placed at the end of long drift tubes by using time-of-flight technique. The neutral temperature is measured with a special mass quadrupole spectrometer placed along the normal to the target surface. The plasma temperature increases with the laser pulse intensity. The ion temperature reaches values of the order of 400 eV, the electron temperature is of the order of 1 keV for hot electrons and 0.1 eV for thermal electrons, and the neutral temperature is of the order of 200 eV. The experimental apparatus, the diagnostic techniques, and the procedures for the plasma temperature characterization will be presented and discussed in detail.},
doi = {10.1134/S1063780X06060080},
url = {https://www.osti.gov/biblio/21080598}, journal = {Plasma Physics Reports},
issn = {1063-780X},
number = 6,
volume = 32,
place = {United States},
year = {2006},
month = {6}
}