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Title: Ionization Waves of Arbitrary Velocity

Abstract

The flying focus is a technique in which a chirped laser beam is focused by a chromatic lens to produce an extended focal spot within which laser intensity can propagate at any velocity. If the intensity is above the ionization threshold of a background gas, an ionization wave will track the ionization threshold intensity isosurface as it propagates. We report on the demonstration of such ionization waves of arbitrary velocity. Subluminal and superluminal ionization fronts were produced, both forward- and backward-propagating relative to the ionizing laser. In conclusion, all backward and all superluminal cases mitigated the issue of ionization-induced refraction that typically challenges the formation of long, contiguous plasma channels.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Rochester, Rochester, NY (United States)
Publication Date:
Research Org.:
Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1444062
Alternate Identifier(s):
OSTI ID: 1439740
Grant/Contract Number:  
NA0001944; SC0016253
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Turnbull, D., Franke, P., Katz, J., Palastro, J. P., Begishev, I. A., Boni, R., Bromage, J., Milder, A. L., Shaw, J. L., and Froula, D. H. Ionization Waves of Arbitrary Velocity. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.120.225001.
Turnbull, D., Franke, P., Katz, J., Palastro, J. P., Begishev, I. A., Boni, R., Bromage, J., Milder, A. L., Shaw, J. L., & Froula, D. H. Ionization Waves of Arbitrary Velocity. United States. doi:10.1103/PhysRevLett.120.225001.
Turnbull, D., Franke, P., Katz, J., Palastro, J. P., Begishev, I. A., Boni, R., Bromage, J., Milder, A. L., Shaw, J. L., and Froula, D. H. Thu . "Ionization Waves of Arbitrary Velocity". United States. doi:10.1103/PhysRevLett.120.225001. https://www.osti.gov/servlets/purl/1444062.
@article{osti_1444062,
title = {Ionization Waves of Arbitrary Velocity},
author = {Turnbull, D. and Franke, P. and Katz, J. and Palastro, J. P. and Begishev, I. A. and Boni, R. and Bromage, J. and Milder, A. L. and Shaw, J. L. and Froula, D. H.},
abstractNote = {The flying focus is a technique in which a chirped laser beam is focused by a chromatic lens to produce an extended focal spot within which laser intensity can propagate at any velocity. If the intensity is above the ionization threshold of a background gas, an ionization wave will track the ionization threshold intensity isosurface as it propagates. We report on the demonstration of such ionization waves of arbitrary velocity. Subluminal and superluminal ionization fronts were produced, both forward- and backward-propagating relative to the ionizing laser. In conclusion, all backward and all superluminal cases mitigated the issue of ionization-induced refraction that typically challenges the formation of long, contiguous plasma channels.},
doi = {10.1103/PhysRevLett.120.225001},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 22,
volume = 120,
place = {United States},
year = {2018},
month = {5}
}

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Cited by: 6 works
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