Generation of hard x-rays by a forsterite terawatt laser

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

doi:10.1117/12.619631

10 September 2005 Generation of hard x-rays by a forsterite terawatt laser

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

Author Affiliations +

Proceedings Volume 5918, Laser-Generated, Synchrotron, and Other Laboratory X-Ray and EUV Sources, Optics, and Applications II; 59180O (2005) https://doi.org/10.1117/12.619631
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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 K_α 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 K_α 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.

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Mikhail B. Agranat, Nikolay E. Andreev, Sergei I. Ashitkov, Edward Boyle, Vladimir E. Fortov, Larry V. Knight, Andrey V. Ovchinnikov, Alexander P. Shevelko, and 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); https://doi.org/10.1117/12.619631

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