Determining the short laser pulse contrast based on X-Ray emission spectroscopy

Abstract

The interaction of high-power short lasers with solid density targets is an important application of modern solid state lasers. However, uncertainties in measurements due to lack of information on the laser pedestal-to-peak contrast limits the validity of many conclusions. We show that X-ray spectral measurements can provide a straightforward way for accessing the laser pedestal-to-peak contrast. The experiments use silicon targets and relativistic laser intensities of 3 × 1020 W/cm2 with a pulse duration of 1 ps. By not using or using a plasma mirror we compare low and high contrast measurements of the Ly-α line and its satellites to show that these lines are an effective laser contrast diagnostic. This diagnostic has potential to reduce uncertainty in future laser-solid interaction studies.

Metadata

Item Type:	Article
Authors/Creators:	Martynenko, A. S. Skobelev, I. Yu Pikuz, S. A. Ryazantsev, S. N. Baird, C. Booth, N. Doehl, L. Durey, P. Farley, D. Kodama, R. Lancaster, K. https://orcid.org/0000-0002-0045-9909 McKenna, P. Murphy, C. https://orcid.org/0000-0003-3849-3229 Spindloe, C. Pikuz, T. A. Woolsey, N. https://orcid.org/0000-0002-2444-9027
Copyright, Publisher and Additional Information:	© 2021 Published by Elsevier B.V. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Funding Information: The study was done under financial support of Russian Foundation for Basic Research (grant# 20-02-00790) and in the frame of the State Assignment to JIHT RAS (topic #075-00892-20-00). The work of UK team received financial support from UK EPSRC grants EP/L01663X/1 and EP/H012605/1 . Publisher Copyright: © 2021 Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
Keywords:	Laser contrast control,Plasma diagnostics,Relativistic laser plasma,Strong field laser physics,X-ray emission spectroscopy
Dates:	Published: March 2021 Published (online): 27 January 2020 Accepted: 24 January 2020
Institution:	The University of York
Academic Units:	The University of York > York Institute for Materials Research The University of York > Faculty of Sciences (York) > Physics (York)
Funding Information:	Funder Grant number THE ROYAL SOCIETY IES 2012 RFBR EPSRC EP/L000644/1
Depositing User:	Pure (York)
Date Deposited:	08 Feb 2021 16:50
Last Modified:	06 Dec 2024 00:19
Published Version:	https://doi.org/10.1016/j.hedp.2021.100924
Status:	Published
Refereed:	Yes
Identification Number:	10.1016/j.hedp.2021.100924
Related URLs:	http://www.scopus.com/inward/record.url?...
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:170892

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Description: 2020-09-24 - Manuscript - revised

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Determining the short laser pulse contrast based on X-Ray emission spectroscopy

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