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Title: Tunable UV upgrade on OMEGA EP

Abstract

The OMEGA EP laser has been upgraded to provide a UV wavelength-tunable beam to support the study of wavelength detuning for the mitigation of cross-beam energy transfer in direct-drive inertial confinement fusion. The beamline delivers up to 0.5 TW in pulses up to 1-ns duration (0.1 TW up to 2.5 ns), to either the OMEGA or OMEGA EP target chambers with wavelength tunable from 350.2 to 353.4 nm. The upgrade leverages the existing optical parametric amplification (OPA) system in the short-pulse front end of OMEGA EP Beamline 1 for amplification of a new tunable, narrowband fiber front end over a broad spectral range. The tunable OPA output is spatially shaped to form a round OMEGA-like beam, which is amplified in the OMEGA EP beamline, then frequency tripled and characterized using the existing OMEGA EP long-pulse infrastructure. A new 3ω beam-transport system intercepts the tunable UV beam near the OMEGA EP target chamber and image relays it to the P9 port of the OMEGA target chamber for joint shots with the OMEGA 60-beam laser. Commissioning of the tunable UV capability has been completed, and four experimental campaigns have been supported with the tunable beam.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
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  1. Univ. of Rochester, NY (United States)
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1502137
Grant/Contract Number:  
NA0003856
Resource Type:
Accepted Manuscript
Journal Name:
Proc. SPIE
Additional Journal Information:
Journal Volume: 10898; Conference: SPIE LASE 2019, San Francisco, CA (United States), 2-7 Feb 2019
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; tunable lasers; UV lasers; high-energy lasers; laser–plasma instability; cross-beam energy transfer

Citation Formats

Kruschwitz, Brian E., Kwiatkowski, Joseph, Dorrer, Christophe, Barczys, Matthew, Consentino, Albert, Froula, Dustin H., Guardalben, Mark J., Hill, Elizabeth M., Nelson, David, Shoup, Milton J., Turnbull, David P., Waxer, Leon J., and Weiner, David. Tunable UV upgrade on OMEGA EP. United States: N. p., 2019. Web. doi:10.1117/12.2505419.
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Kruschwitz, Brian E., Kwiatkowski, Joseph, Dorrer, Christophe, Barczys, Matthew, Consentino, Albert, Froula, Dustin H., Guardalben, Mark J., Hill, Elizabeth M., Nelson, David, Shoup, Milton J., Turnbull, David P., Waxer, Leon J., & Weiner, David. Tunable UV upgrade on OMEGA EP. United States. https://doi.org/10.1117/12.2505419
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Kruschwitz, Brian E., Kwiatkowski, Joseph, Dorrer, Christophe, Barczys, Matthew, Consentino, Albert, Froula, Dustin H., Guardalben, Mark J., Hill, Elizabeth M., Nelson, David, Shoup, Milton J., Turnbull, David P., Waxer, Leon J., and Weiner, David. Mon . "Tunable UV upgrade on OMEGA EP". United States. https://doi.org/10.1117/12.2505419. https://www.osti.gov/servlets/purl/1502137.
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@article{osti_1502137,
title = {Tunable UV upgrade on OMEGA EP},
author = {Kruschwitz, Brian E. and Kwiatkowski, Joseph and Dorrer, Christophe and Barczys, Matthew and Consentino, Albert and Froula, Dustin H. and Guardalben, Mark J. and Hill, Elizabeth M. and Nelson, David and Shoup, Milton J. and Turnbull, David P. and Waxer, Leon J. and Weiner, David},
abstractNote = {The OMEGA EP laser has been upgraded to provide a UV wavelength-tunable beam to support the study of wavelength detuning for the mitigation of cross-beam energy transfer in direct-drive inertial confinement fusion. The beamline delivers up to 0.5 TW in pulses up to 1-ns duration (0.1 TW up to 2.5 ns), to either the OMEGA or OMEGA EP target chambers with wavelength tunable from 350.2 to 353.4 nm. The upgrade leverages the existing optical parametric amplification (OPA) system in the short-pulse front end of OMEGA EP Beamline 1 for amplification of a new tunable, narrowband fiber front end over a broad spectral range. The tunable OPA output is spatially shaped to form a round OMEGA-like beam, which is amplified in the OMEGA EP beamline, then frequency tripled and characterized using the existing OMEGA EP long-pulse infrastructure. A new 3ω beam-transport system intercepts the tunable UV beam near the OMEGA EP target chamber and image relays it to the P9 port of the OMEGA target chamber for joint shots with the OMEGA 60-beam laser. Commissioning of the tunable UV capability has been completed, and four experimental campaigns have been supported with the tunable beam.},
doi = {10.1117/12.2505419},
journal = {Proc. SPIE},
number = ,
volume = 10898,
place = {United States},
year = {2019},
month = {3}
}
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https://doi.org/10.1117/12.2505419
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