Proton Generation by Ultra-Short High-Power Laser and the Dependence on Laser Intensity and Pulse Duration
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...
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| Veröffentlicht in: | Rēzā kenkyū 2003, Vol.31(11), pp.747-751 |
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| container_title | Rēzā kenkyū |
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| creator | OISHI, Yuji NAYUKI, Takuya FUJII, Takashi TAKIZAWA, Yasushi NEMOTO, Koshichi YAMAZAKI, Tosimitsu KAYOIJI, Tsutomu SEKIYA, Tomohiko HORIOKA, Kazuhiko OKANO, Yasuaki HIRONAKA, Yoichiro NAKAMURA, Kazutaka G. KONDO, Ken-ichi |
| description | 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. |
| doi_str_mv | 10.2184/lsj.31.747 |
| format | Article |
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| identifier | ISSN: 0387-0200 |
| ispartof | The Review of Laser Engineering, 2003, Vol.31(11), pp.747-751 |
| issn | 0387-0200 1349-6603 |
| language | eng |
| recordid | cdi_proquest_journals_1476856495 |
| source | J-STAGE (Free - Japanese); EZB Electronic Journals Library |
| subjects | Laser acceleration Particle generation Ultra-short high-power laser |
| title | Proton Generation by Ultra-Short High-Power Laser and the Dependence on Laser Intensity and Pulse Duration |
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