10 September 2005 Generation of hard x-rays by a forsterite terawatt laser
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Abstract
A compact, tabletop terawatt forsterite laser (1.24 μm /100 mJ/ 80 fs) is used for generation of fast hard x-ray radiation from laser-produced plasmas. Plasmas are created on massive solid Fe and Cu targets. X-ray radiation is studied using a focusing crystal von Hamos spectrometer with a CCD linear array as x-ray detector. High efficiency of the spectrometer in a wide spectral range allows us to record x-ray spectra by one laser shot. Intense Kα radiation is studied with high spectral resolution (λ/δλ~1000) at various focusing conditions: main laser radiation and second harmonic radiation. With a copper target the Kα radiation yield was equal to 4×109 photon/pulse in 4π steradian, that corresponds to conversion efficiency of 0.02%. Processes responsible for ultrafast hard x-ray radiation are discussed.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mikhail B. Agranat, Nikolay E. Andreev, Sergei I. Ashitkov, Edward Boyle, Vladimir E. Fortov, Larry V. Knight, Andrey V. Ovchinnikov, Alexander P. Shevelko, Dmitry S. Sitnikov, "Generation of hard x-rays by a forsterite terawatt laser", Proc. SPIE 5918, Laser-Generated, Synchrotron, and Other Laboratory X-Ray and EUV Sources, Optics, and Applications II, 59180O (10 September 2005); doi: 10.1117/12.619631; https://doi.org/10.1117/12.619631
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