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Title: Laser-driven magnetized liner inertial fusion on OMEGA

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2]; ORCiD logo [2];  [2];  [2]; ORCiD logo [2]; ORCiD logo [3]
  1. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
  2. Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
  3. National Cheng Kung University, Tainan, Taiwan
Publication Date:
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1375642
Grant/Contract Number:
NA0001944; AR0000568
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 5; Related Information: CHORUS Timestamp: 2018-02-15 00:01:02; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English

Citation Formats

Barnak, D. H., Davies, J. R., Betti, R., Bonino, M. J., Campbell, E. M., Glebov, V. Yu., Harding, D. R., Knauer, J. P., Regan, S. P., Sefkow, A. B., Harvey-Thompson, A. J., Peterson, K. J., Sinars, D. B., Slutz, S. A., Weis, M. R., and Chang, P. -Y.. Laser-driven magnetized liner inertial fusion on OMEGA. United States: N. p., 2017. Web. doi:10.1063/1.4982692.
Barnak, D. H., Davies, J. R., Betti, R., Bonino, M. J., Campbell, E. M., Glebov, V. Yu., Harding, D. R., Knauer, J. P., Regan, S. P., Sefkow, A. B., Harvey-Thompson, A. J., Peterson, K. J., Sinars, D. B., Slutz, S. A., Weis, M. R., & Chang, P. -Y.. Laser-driven magnetized liner inertial fusion on OMEGA. United States. doi:10.1063/1.4982692.
Barnak, D. H., Davies, J. R., Betti, R., Bonino, M. J., Campbell, E. M., Glebov, V. Yu., Harding, D. R., Knauer, J. P., Regan, S. P., Sefkow, A. B., Harvey-Thompson, A. J., Peterson, K. J., Sinars, D. B., Slutz, S. A., Weis, M. R., and Chang, P. -Y.. Mon . "Laser-driven magnetized liner inertial fusion on OMEGA". United States. doi:10.1063/1.4982692.
@article{osti_1375642,
title = {Laser-driven magnetized liner inertial fusion on OMEGA},
author = {Barnak, D. H. and Davies, J. R. and Betti, R. and Bonino, M. J. and Campbell, E. M. and Glebov, V. Yu. and Harding, D. R. and Knauer, J. P. and Regan, S. P. and Sefkow, A. B. and Harvey-Thompson, A. J. and Peterson, K. J. and Sinars, D. B. and Slutz, S. A. and Weis, M. R. and Chang, P. -Y.},
abstractNote = {},
doi = {10.1063/1.4982692},
journal = {Physics of Plasmas},
number = 5,
volume = 24,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.4982692

Citation Metrics:
Cited by: 4works
Citation information provided by
Web of Science

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  • A laser-driven, magnetized liner inertial fusion (MagLIF) experiment is designed in this paper for the OMEGA Laser System by scaling down the Z point design to provide the first experimental data on MagLIF scaling. OMEGA delivers roughly 1000× less energy than Z, so target linear dimensions are reduced by factors of ~10. Magneto-inertial fusion electrical discharge system could provide an axial magnetic field of 10 T. Two-dimensional hydrocode modeling indicates that a single OMEGA beam can preheat the fuel to a mean temperature of ~200 eV, limited by mix caused by heat flow into the wall. One-dimensional magnetohydrodynamic (MHD) modelingmore » is used to determine the pulse duration and fuel density that optimize neutron yield at a fuel convergence ratio of roughly 25 or less, matching the Z point design, for a range of shell thicknesses. A relatively thinner shell, giving a higher implosion velocity, is required to give adequate fuel heating on OMEGA compared to Z because of the increase in thermal losses in smaller targets. Two-dimensional MHD modeling of the point design gives roughly a 50% reduction in compressed density, temperature, and magnetic field from 1-D because of end losses. Finally, scaling up the OMEGA point design to the MJ laser energy available on the National Ignition Facility gives a 500-fold increase in neutron yield in 1-D modeling.« less
  • Cited by 2
  • In this paper, we present a platform on the OMEGA EP Laser Facility that creates and diagnoses the conditions present during the preheat stage of the MAGnetized Liner Inertial Fusion (MagLIF) concept. Experiments were conducted using 9 kJ of 3ω (355 nm) light to heat an underdense deuterium gas (electron density: 2.5 × 10 20 cm -3 = 0.025 of critical density) magnetized with a 10 T axial field. Results show that the deuterium plasma reached a peak electron temperature of 670 ± 140 eV, diagnosed using streaked spectroscopy of an argon dopant. The results demonstrate that plasmas relevant tomore » the preheat stage of MagLIF can be produced at multiple laser facilities, thereby enabling more rapid progress in understanding magnetized preheat. Results are compared with magneto-radiation-hydrodynamics simulations, and plans for future experiments are described.« less
  • A cryogenically cooled hardware platform has been developed and commissioned on the Z Facility at Sandia National Laboratories in support of the Magnetized Liner Inertial Fusion (MagLIF) Program. MagLIF is a magneto-inertial fusion concept that employs a magnetically imploded metallic tube (liner) to compress and inertially confine premagnetized and preheated fusion fuel. The fuel is preheated using a ~2 kJ laser that must pass through a ~1.5-3.5-μm-thick polyimide “window” at the target’s laser entrance hole (LEH). As the terawatt-class laser interacts with the dense window, laser plasma instabilities (LPIs) can develop, which reduce the preheat energy delivered to the fuel,more » initiate fuel contamination, and degrade target performance. Cryogenically cooled targets increase the parameter space accessible to MagLIF target designs by allowing nearly 10 times thinner windows to be used for any accessible gas density. Thinner LEH windows reduce the deleterious effects of difficult to model LPIs. The Z Facility’s cryogenic infrastructure has been significantly altered to enable compatibility with the premagnetization and fuel preheat stages of MagLIF. The MagLIF cryostat brings the liquid helium coolant directly to the target via an electrically resistive conduit. This design maximizes cooling power while allowing rapid diffusion of the axial magnetic field supplied by external Helmholtz-like coils. A variety of techniques have been developed to mitigate the accumulation of ice from vacuum chamber contaminants on the cooled LEH window, as even a few hundred nanometers of ice would impact laser energy coupling to the fuel region. Here, the MagLIF cryostat has demonstrated compatibility with the premagnetization and preheat stages of MagLIF and the ability to cool targets to liquid deuterium temperatures in approximately 5 min.« less
  • Sandia National Laboratories is pursuing a variation of Magneto-Inertial Fusion called Magnetized Liner Inertial Fusion, or MagLIF. The MagLIF approach requires magnetization of the deuterium fuel, which is accomplished by an initial external B-Field and laser-driven pre-heat. Although magnetization is crucial to the concept, it is challenging to couple sufficient energy to the fuel, since laser-plasma instabilities exist, and a compromise between laser spot size, laser entrance window thickness, and fuel density must be found. Ultimately, nonlinear processes in laser plasma interaction, or laser-plasma instabilities (LPI), complicate the deposition of laser energy by enhanced absorption, backscatter, filamentation and beam-spray. Wemore » determine and discuss key LPI processes and mitigation methods. Results with and without improvement measures are presented.« less