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x-ray sources from laser–plasma interactions

Laser and Particle Beams (1)

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Experimental and numerical study of ultra-short laser-produced collimated Cu K α X-ray source
R. Rathore, V. Arora, H. Singhal, T. Mandal, J.A. Chakera, P.A. Naik
Journal:

Laser and Particle Beams / Volume 35 / Issue 3 / September 2017

Published online by Cambridge University Press:

03 July 2017, pp. 442-449
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K α X-ray sources generated from the interaction of ultra-short laser pulses with solids are compact and low-cost source of ultra-short quasi-monochromatic X-rays compared with synchrotron radiation source. Development of collimated ultra-short K α X-ray source by the interaction of 45 fs Ti:sapphire laser pulse with Cu wire target is presented in this paper. A study of the K α source with laser parameters such as energy and pulse duration was carried out. The observed K α X-ray photon flux was ~2.7 × 108 photons/shot at the laser intensity of ~2.8 × 1017 W cm−2. A model was developed to analyze the observed results. The K α radiation was coupled to a polycapillary collimator to generate a collimated low divergence (0.8 mrad) X-ray beam. Such sources are useful for time-resolved X-ray diffraction and imaging studies.