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Experimental and numerical study of ultra-short laser-produced collimated Cu K α X-ray source

Published online by Cambridge University Press:  03 July 2017

R. Rathore*
Affiliation:
Laser Plasma Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India
V. Arora
Affiliation:
Laser Plasma Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India
H. Singhal
Affiliation:
Laser Plasma Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India
T. Mandal
Affiliation:
Laser Plasma Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, Maharashtra, India
J.A. Chakera
Affiliation:
Laser Plasma Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, Maharashtra, India
P.A. Naik
Affiliation:
Laser Plasma Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, Maharashtra, India
*
*Address correspondence and reprint requests to: R. Rathore, Laser Plasma Section, Raja Ramanna Centre for Advanced Technology, Indore 452013 MP, India. E-mail: ranjana@rrcat.gov.in

Abstract

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.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2017 

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