Ultra hard x rays from krypton clusters heated by intense laser fields
| Autor: | Enrico Brunetti, J. G. Gallacher, Steven Jamison, Bernhard Ersfeld, D. Clark, Dino A. Jaroszynski, Gregory Vieux, Riju C. Issac |
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| Rok vydání: | 2004 |
| Předmět: |
Physics
education.field_of_study Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena Population Krypton Energy conversion efficiency Bremsstrahlung chemistry.chemical_element Plasma Electron Condensed Matter Physics Laser Spectral line law.invention chemistry law Physics::Atomic Physics Atomic physics education |
| Zdroj: | Physics of Plasmas. 11:3491-3496 |
| ISSN: | 1089-7674 1070-664X |
| DOI: | 10.1063/1.1755222 |
| Popis: | The interaction of ultrashort laser pulses with krypton clusters at intensity up to 1.3×1018 Wcm−2 has been investigated. Intense Kα and Kβ emission from krypton at 12.66 and 14.1 keV, respectively, has been observed using conventional solid state x-ray detectors. The measured x-ray spectra have broad bremsstrahlung continuum reaching to photon energies up to 45 keV, with evidence that approximately 10% of electrons that are heated to very high electron temperatures, which is consistent with a two-temperature electron distribution. This is ascribed to the presence of a hot electron population, similar to that found in laser–solid interactions. The highest laser energy to x-ray conversion efficiency observed is 9.2×10−7, which is equivalent to 45 nJ x-ray pulse energy from the 12.66 keV krypton Kα transition. |
| Databáze: | OpenAIRE |
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