超短パルス超高強度レーザーを用いたプロトン生成とそのレーザー強度とパルス幅依存性

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タイトル別名
  • Proton Generation by Ultra-Short High-Power Laser and the Dependence on Laser Intensity and Pulse Duration
  • チョウタンパルス チョウコウキョウド レーザー オ モチイタ プロトン セイセイ ト ソノ レーザー キョウド ト パルスハバ イゾンセイ

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抄録

Energetic protons (∼ 1.2 MeV) were generated by irradiation of ultra-short high-power laser pulses onto a 5 μm thick copper tape target and the dependence of the proton energies on the laser intensity and pulse duration were investigated. The laser intensity was varied between 8.5×1017 W/cm2 and 6.6×1018 W/cm2, and the pulse duration was varied from 55 fs to 400 fs. The maximum proton energy Ep_max and proton temperature were proportional to laser intensity, and they increased with the pulse duration when the laser intensity was kept constant. Thus far, Ep_max has been usually scaled as a function of laser intensity, but Ep_max depends not only on the laser intensity, but also on the pulse duration in an ultra-short pulse regime such as several tens of femto-seconds.

収録刊行物

  • レーザー研究

    レーザー研究 31 (11), 747-751, 2003

    一般社団法人 レーザー学会

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