Plasma mirror focal spot quality for glass and aluminum mirrors for laser pulses up to 20 ps
Abstract
High-intensity short-pulse lasers are being pushed further as applications continue to demand higher laser intensities. Uses such as radiography and laser-driven particle acceleration require these higher intensities to produce the necessary x-ray and particle fluxes. Achieving these intensities, however, is limited by the damage threshold of costly optics and the complexity of target chambers. This is evidenced by the Advanced Radiographic Capability (ARC) short-pulse laser at the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory, producing four high-energy laser pulses at 30 ps pulse duration, being limited to an intensity of by the large focal spot size of . Due to the setup complexity of NIF, changing the location of the final focusing parabola in order to improve the focal spot size is not an option. This leads to the possible use of disposable ellipsoidal plasma mirrors (PMs) placed within the chamber, close to the target in an attempt to refocus the four ARC beams. However, the behavior of PMs at these relatively long pulse durations (tens of picoseconds) is not well characterized. The results from the COMET laser at the Jupiter Laser Facility carried out at 0.5 to 20 ps pulse durations on flat mirrors are presented as a necessary first step towards focusing curved mirrors. The findings show defocusing at longer pulse durations and higher intensities, with less degradation when using aluminum coated mirrors.
- Authors:
-
- Univ. of California San Diego, La Jolla, CA (United States). Center for Energy Research
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1806424
- Alternate Identifier(s):
- OSTI ID: 1601525
- Report Number(s):
- LLNL-JRNL-818274
Journal ID: ISSN 0146-9592; 1028384; TRN: US2212757
- Grant/Contract Number:
- AC52-07NA27344; 17-ERD-039
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Optics Letters
- Additional Journal Information:
- Journal Volume: 45; Journal Issue: 5; Journal ID: ISSN 0146-9592
- Publisher:
- Optical Society of America (OSA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Edghill, Brandon, Forestier-Colleoni, Pierre, Park, Jaebum, Rubenchik, Alexander, Beg, Farhat N., and Ma, Tammy. Plasma mirror focal spot quality for glass and aluminum mirrors for laser pulses up to 20 ps. United States: N. p., 2020.
Web. doi:10.1364/ol.385326.
Edghill, Brandon, Forestier-Colleoni, Pierre, Park, Jaebum, Rubenchik, Alexander, Beg, Farhat N., & Ma, Tammy. Plasma mirror focal spot quality for glass and aluminum mirrors for laser pulses up to 20 ps. United States. https://doi.org/10.1364/ol.385326
Edghill, Brandon, Forestier-Colleoni, Pierre, Park, Jaebum, Rubenchik, Alexander, Beg, Farhat N., and Ma, Tammy. Thu .
"Plasma mirror focal spot quality for glass and aluminum mirrors for laser pulses up to 20 ps". United States. https://doi.org/10.1364/ol.385326. https://www.osti.gov/servlets/purl/1806424.
@article{osti_1806424,
title = {Plasma mirror focal spot quality for glass and aluminum mirrors for laser pulses up to 20 ps},
author = {Edghill, Brandon and Forestier-Colleoni, Pierre and Park, Jaebum and Rubenchik, Alexander and Beg, Farhat N. and Ma, Tammy},
abstractNote = {High-intensity short-pulse lasers are being pushed further as applications continue to demand higher laser intensities. Uses such as radiography and laser-driven particle acceleration require these higher intensities to produce the necessary x-ray and particle fluxes. Achieving these intensities, however, is limited by the damage threshold of costly optics and the complexity of target chambers. This is evidenced by the Advanced Radiographic Capability (ARC) short-pulse laser at the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory, producing four high-energy ≈ <#comment/> 1 k J laser pulses at 30 ps pulse duration, being limited to an intensity of 10 18 W / c m 2 by the large focal spot size of ≈ <#comment/> 100 µ <#comment/> m . Due to the setup complexity of NIF, changing the location of the final focusing parabola in order to improve the focal spot size is not an option. This leads to the possible use of disposable ellipsoidal plasma mirrors (PMs) placed within the chamber, close to the target in an attempt to refocus the four ARC beams. However, the behavior of PMs at these relatively long pulse durations (tens of picoseconds) is not well characterized. The results from the COMET laser at the Jupiter Laser Facility carried out at 0.5 to 20 ps pulse durations on flat mirrors are presented as a necessary first step towards focusing curved mirrors. The findings show defocusing at longer pulse durations and higher intensities, with less degradation when using aluminum coated mirrors.},
doi = {10.1364/ol.385326},
journal = {Optics Letters},
number = 5,
volume = 45,
place = {United States},
year = {Thu Feb 27 00:00:00 EST 2020},
month = {Thu Feb 27 00:00:00 EST 2020}
}
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