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  • thema EDItEUR::P Mathematics and Science::PD Science: general issues  (2)
  • Laser Pulse Phenomena and Applications  (2)
  • English  (2)
  • Czech
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    InTechOpen | Laser Pulse Phenomena and Applications
    Publication Date: 2024-04-04
    Description: There are many industrial and medical applications of CO2 (λ=10.6 μm) and Nd:YAG (λ=1.06 μm) infrared lasers for which the quality of the process are tightly connected to the characteristic of the laser pulse. These two types of lasers deliver pulses with duration, repetition frequency and power that can be controlled by means of a programmable electronic control unit. An open-loop control generally optimize the process performances by availing of a laser system model. However, this method cannot control that during the operation the laser source and the optical delivering system could deteriorate; moreover the laser beam characteristics and laser pulse temporal envelope could change by several factors like power supply variations, optical beam misalignments, dirty deposits on mirrors, changes in laser efficiency and many others .
    Keywords: laser pulses ; pyroelectric sensors ; laser pulses ; pyroelectric sensors ; Hertz ; Micrometre ; Polyvinylidene fluoride ; Power density ; thema EDItEUR::P Mathematics and Science::PD Science: general issues
    Language: English
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  • 2
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    InTechOpen | Laser Pulse Phenomena and Applications
    Publication Date: 2024-04-04
    Description: In 1979 Tajima and Dawson, Tajima & Dawson (1979), on the basis of theoretical work and simulations, have shown that relativistic plasma waves are suitable for the development of compact accelerators. In the proposed schemes, electrons were injected externally and were accelerated through the very high electric field (GV/m) sustained by relativistic plasma waves driven by lasers, in the laser beatwave regime or in the laser wakefield regime. Several experiments have been performed following their idea and injected electrons at the few MeV level have indeed been accelerated by electric fields in the GV/m range in a plasma medium using the beat wave and laser wakefield schemes. With the development of more powerful lasers, much higher electric fields were achieved, from few GV/m to more than 1 TV/m, Malka et al. (2002).
    Keywords: laser plasma accelerators ; laser plasma accelerators ; Cathode ray ; Electric field ; Electron ; Waves in plasmas ; thema EDItEUR::P Mathematics and Science::PD Science: general issues
    Language: English
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