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Title: Photon Acceleration in a Flying Focus

Abstract

A high-intensity laser pulse propagating through a medium triggers an ionization front that can accelerate and frequency-upshift the photons of a second pulse. Here, the maximum upshift is ultimately limited by the accelerated photons outpacing the ionization front or the ionizing pulse refracting from the plasma. Here we apply the flying focus—a moving focal point resulting from a chirped laser pulse focused by a chromatic lens—to overcome these limitations. Theory and simulations demonstrate that the ionization front produced by a flying focus can frequency-upshift an ultrashort optical pulse to the extreme ultraviolet over a centimeter of propagation. An analytic model of the upshift predicts that this scheme could be scaled to a novel table-top source of spatially coherent x-rays.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Rochester, Rochester, NY (United States). Lab for Laser Energetics
Publication Date:
Research Org.:
Univ. of Rochester, Rochester, NY (United States). Lab for Laser Energetics
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA)
Contributing Org.:
Laboratory for Laser Energetics, University of Rochester
OSTI Identifier:
1566142
Report Number(s):
2019-46, 2477, 1517
Journal ID: ISSN 0031-9007; PRLTAO; 2019-46, 2477, 1517; TRN: US2000948
Grant/Contract Number:  
NA0001944
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 12; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Howard, A. J., Turnbull, D., Davies, A. S., Franke, P., Froula, D. H., and Palastro, J. P. Photon Acceleration in a Flying Focus. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.123.124801.
Howard, A. J., Turnbull, D., Davies, A. S., Franke, P., Froula, D. H., & Palastro, J. P. Photon Acceleration in a Flying Focus. United States. doi:10.1103/PhysRevLett.123.124801.
Howard, A. J., Turnbull, D., Davies, A. S., Franke, P., Froula, D. H., and Palastro, J. P. Fri . "Photon Acceleration in a Flying Focus". United States. doi:10.1103/PhysRevLett.123.124801. https://www.osti.gov/servlets/purl/1566142.
@article{osti_1566142,
title = {Photon Acceleration in a Flying Focus},
author = {Howard, A. J. and Turnbull, D. and Davies, A. S. and Franke, P. and Froula, D. H. and Palastro, J. P.},
abstractNote = {A high-intensity laser pulse propagating through a medium triggers an ionization front that can accelerate and frequency-upshift the photons of a second pulse. Here, the maximum upshift is ultimately limited by the accelerated photons outpacing the ionization front or the ionizing pulse refracting from the plasma. Here we apply the flying focus—a moving focal point resulting from a chirped laser pulse focused by a chromatic lens—to overcome these limitations. Theory and simulations demonstrate that the ionization front produced by a flying focus can frequency-upshift an ultrashort optical pulse to the extreme ultraviolet over a centimeter of propagation. An analytic model of the upshift predicts that this scheme could be scaled to a novel table-top source of spatially coherent x-rays.},
doi = {10.1103/PhysRevLett.123.124801},
journal = {Physical Review Letters},
number = 12,
volume = 123,
place = {United States},
year = {2019},
month = {9}
}

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Cited by: 4 works
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