A. J. Harvey-Thompson
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View article: Spatially and temporally resolved plasma parameter estimations of laser heated MagLIF relevant gas pipes at NIF
Spatially and temporally resolved plasma parameter estimations of laser heated MagLIF relevant gas pipes at NIF Open
The ability to control laser pre-heat is an integral part of the inertial confinement fusion concept known as Magnetized Liner Inertial Fusion. This process is studied at the National Ignition Facility (NIF) where 4 of the 192 laser beams …
View article: Magnetized liner inertial fusion platform development to assess performance scaling with drive parameters
Magnetized liner inertial fusion platform development to assess performance scaling with drive parameters Open
Magnetized liner inertial fusion (MagLIF) experiments have demonstrated fusion-relevant ion temperatures up to 3.1 keV and thermonuclear production of up to 1.1 × 1013 deuterium–deuterium neutrons. This performance was enabled through plat…
View article: Hydrodynamic expansion and near-infrared absorption of x-ray heated aluminum plasmas
Hydrodynamic expansion and near-infrared absorption of x-ray heated aluminum plasmas Open
We use x-ray pulses from dense argon plasmas at the Z Machine (Sandia National Laboratories) to generate hypersonic aluminum plasmas akin to material ejecta during proposed planetary defense missions, fusion reactor wall excursions, and ot…
View article: Assessing the performance of MagLIF with 3D MHD simulations
Assessing the performance of MagLIF with 3D MHD simulations Open
The Magnetized Liner Inertial Fusion (MagLIF) experimental platform at Sandia National Laboratories has realized a number of recent improvements in electrical current and laser preheat coupling but fusion yields are below expectations, bas…
View article: Opposition Research: A novel platform on the Z Machine to study radiation flow in complex geometries
Opposition Research: A novel platform on the Z Machine to study radiation flow in complex geometries Open
View article: Developing a platform to assess the evolution of the fuel-liner interface due to laser preheat in MagLIF
Developing a platform to assess the evolution of the fuel-liner interface due to laser preheat in MagLIF Open
View article: On the benefits of using shorter rise-time current pulses to drive MagLIF implosions
On the benefits of using shorter rise-time current pulses to drive MagLIF implosions Open
View article: Neutron energy spectrum measurements from MagLIF implosions on Z
Neutron energy spectrum measurements from MagLIF implosions on Z Open
View article: Measured nuclear burn widths for Magnetized Liner Inertial Fusion (MagLIF) experiments
Measured nuclear burn widths for Magnetized Liner Inertial Fusion (MagLIF) experiments Open
View article: Developments in assessing the generalized Lawson criterion in magnetized liner inertial fusion
Developments in assessing the generalized Lawson criterion in magnetized liner inertial fusion Open
View article: A comparison of MagLIF: Status and plans to improve performance
A comparison of MagLIF: Status and plans to improve performance Open
View article: Mining experimental magnetized liner inertial fusion data: Trends in stagnation morphology
Mining experimental magnetized liner inertial fusion data: Trends in stagnation morphology Open
In magnetized liner inertial fusion (MagLIF), a cylindrical liner filled with fusion fuel is imploded with the goal of producing a one-dimensional plasma column at thermonuclear conditions. However, structures attributed to three-dimension…
View article: Mining magnetized liner inertial fusion data: trends in stagnation morphology
Mining magnetized liner inertial fusion data: trends in stagnation morphology Open
View article: Development of a high performance MagLIF target platform using high aspect ratio coated liners and low-mix laser preheat
Development of a high performance MagLIF target platform using high aspect ratio coated liners and low-mix laser preheat Open
We report on a series of Magnetized Liner Inertial Fusion (MagLIF) experiments conducted on the Z pulsed power facility that utilized high aspect ratio (ratio of outer radius to wall thickness) liners with dielectric coatings and low-mix l…
View article: Neutron Source Reconstruction of One-Dimensional Imager of Neutrons at the Z Facility
Neutron Source Reconstruction of One-Dimensional Imager of Neutrons at the Z Facility Open
View article: Development of a large field of view radiography capability for MagLIF preheat experiments on the Omega EP laser facility
Development of a large field of view radiography capability for MagLIF preheat experiments on the Omega EP laser facility Open
View article: Controlling morphology and improving reproducibility of magnetized liner inertial fusion experiments
Controlling morphology and improving reproducibility of magnetized liner inertial fusion experiments Open
X-ray imaging indicates magnetized liner inertial fusion (MagLIF) stagnation columns have a complicated quasi-helical structure with significant variations in x-ray brightness along the column. In this work, we describe MagLIF experiments …
View article: Three-dimensional simulations of magneto-inertial Magnetic-Direct-Drive targets
Three-dimensional simulations of magneto-inertial Magnetic-Direct-Drive targets Open
For the cylindrically symmetric targets that are normally fielded on the Z machine, two dimensional axisymmetric MHD simulations provide the backbone of our target design capability. These simulations capture the essential operation of the…
View article: An overview of magneto-inertial fusion on the Z Machine at Sandia National Laboratories.
An overview of magneto-inertial fusion on the Z Machine at Sandia National Laboratories. Open
View article: X-ray self-emission imaging with spherically bent Bragg crystals on the Z-machine
X-ray self-emission imaging with spherically bent Bragg crystals on the Z-machine Open
An x-ray imaging scheme using spherically bent crystals was implemented on the Z-machine to image x rays emitted by the hot, dense plasma generated by a Magnetized Liner Inertial Fusion (MagLIF) target. This diagnostic relies on a spherica…
View article: Demonstration of improved laser preheat with a cryogenically cooled magnetized liner inertial fusion platform
Demonstration of improved laser preheat with a cryogenically cooled magnetized liner inertial fusion platform Open
We report on progress implementing and testing cryogenically cooled platforms for Magnetized Liner Inertial Fusion (MagLIF) experiments. Two cryogenically cooled experimental platforms were developed: an integrated platform fielded on the …
View article: Data-driven assessment of magnetic charged particle confinement parameter scaling in magnetized liner inertial fusion experiments on Z
Data-driven assessment of magnetic charged particle confinement parameter scaling in magnetized liner inertial fusion experiments on Z Open
In magneto-inertial fusion, the ratio of the characteristic fuel length perpendicular to the applied magnetic field R to the α-particle Larmor radius ϱα is a critical parameter setting the scale of electron thermal-conduction loss and char…
View article: Laser Preheat Characterization for MagLIF Experiments
Laser Preheat Characterization for MagLIF Experiments Open
View article: Using deep-learning to uncover physics of magnetic charged particle confinement in Magnetized Liner Inertial Fusion (MagLIF)
Using deep-learning to uncover physics of magnetic charged particle confinement in Magnetized Liner Inertial Fusion (MagLIF) Open
View article: Exploring the parameter space of MagLIF implosions using similarity scaling. II. Current scaling
Exploring the parameter space of MagLIF implosions using similarity scaling. II. Current scaling Open
Magnetized liner inertial fusion (MagLIF) is a magneto-inertial-fusion (MIF) concept, which is presently being studied on the Z pulsed power facility. The MagLIF platform has achieved interesting plasma conditions at stagnation and produce…
View article: Experimental demonstration of >20 kJ laser energy coupling in 1-cm hydrocarbon-filled gas pipe targets via inverse Bremsstrahlung absorption with applications to MagLIF
Experimental demonstration of >20 kJ laser energy coupling in 1-cm hydrocarbon-filled gas pipe targets via inverse Bremsstrahlung absorption with applications to MagLIF Open
Laser propagation experiments using four beams of the National Ignition Facility to deliver up to 35 kJ of laser energy at 351 nm laser wavelength to heat magnetized liner inertial fusion-scale (1 cm-long), hydrocarbon-filled gas pipe targ…
View article: Helium as a Surrogate for Deuterium in LPI Studies
Helium as a Surrogate for Deuterium in LPI Studies Open
Helium or neopentane can be used as surrogate gas fill for deuterium (D2) or deuterium-tritium (DT) in laser-plasma interaction studies. Surrogates are convenient to avoid flammability hazards or the integration of cryogenics in an experim…
View article: Validation of ablation model for polyethylene using pulsed x-ray and proton exposures
Validation of ablation model for polyethylene using pulsed x-ray and proton exposures Open
The surface erosion of polyethylene is interrogated using pulsed x rays at the Z Machine (Sandia National Laboratories) and with proton beams at the Gamble II generator (Naval Research Laboratory) to validate a coupled model for volumetric…
View article: Overview of MagLIF program for TNB working group meeting.
Overview of MagLIF program for TNB working group meeting. Open
View article: Scaling of laser plasma instabilities in MagLIF preheat with applied magnetic field.
Scaling of laser plasma instabilities in MagLIF preheat with applied magnetic field. Open