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Tunable UV upgrade on OMEGA EP

Journal Article · · Proc. SPIE
DOI:https://doi.org/10.1117/12.2505419· OSTI ID:1502137
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2]
  1. Univ. of Rochester, NY (United States); Laboratory for Laser Energetics, University of Rochester
  2. Univ. of Rochester, NY (United States)
+ Show Author Affiliations
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.
Research Organization:
Univ. of Rochester, NY (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003856
OSTI ID:
1502137
Journal Information:
Proc. SPIE, Journal Name: Proc. SPIE Vol. 10898
Country of Publication:
United States
Language:
English

References (11)

Initial performance results of the OMEGA laser system journal January 1997
OMEGA EP: High-energy petawatt capability for the OMEGA laser facility journal June 2006
Crossed-beam energy transfer in direct-drive implosions journal May 2012
Wavelength-detuning cross-beam energy transfer mitigation scheme for direct drive: Modeling and evidence from National Ignition Facility implosions journal May 2018
Theory and simulation of stimulated Brillouin scatter excited by nonabsorbed light in laser fusion systems journal January 1981
Crossed-beam energy transfer: polarization effects and evidence of saturation journal April 2018
Modeling of frequency doubling and tripling with measured crystal spatial refractive-index nonuniformities journal January 2001
High-resolution stimulated Brillouin gain spectroscopy in glasses and crystals journal January 1993
Experimental observation and suppression of transverse stimulated Brillouin scattering in large optical components journal January 1989
Spectrally tunable, temporally shaped parametric front end to seed high-energy Nd:glass laser systems journal January 2017
Transverse modulational instabilities in the presence of stimulated rotational Raman scattering with a high-energy laser journal January 1995

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
UV lasers
cross-beam energy transfer
high-energy lasers
laser–plasma instability
tunable lasers