4.6 Article

Bayesian inferences of electrical current delivered to shocked transmission lines

Related references

Note: Only part of the references are listed.
Article Physics, Fluids & Plasmas

Exploring the parameter space of MagLIF implosions using similarity scaling. III. Rise-time scaling

D. E. Ruiz et al.

Summary: Magnetized liner inertial fusion (MagLIF) is a z-pinch magneto-inertial-fusion concept. This study analyzes the variations in the performance of MagLIF loads by changing the current-rise time or equivalently, the implosion timescale. Comparisons between numerical simulations and theory show the trade-offs in the MagLIF design space when considering future pulsed-power generators with shorter and longer current-rise times.

PHYSICS OF PLASMAS (2023)

Article Physics, Fluids & Plasmas

Exploring the parameter space of MagLIF implosions using similarity scaling. II. Current scaling

D. E. Ruiz et al.

Summary: Magnetized liner inertial fusion (MagLIF) is a promising concept for achieving fusion reactions, which has shown interesting results in laboratory experiments. However, scaling this concept to higher peak currents is challenging due to the complex nature of the experimental parameters and physical processes involved. In this work, a novel method based on similarity scaling is proposed to scale MagLIF loads, aiming to preserve known physics regimes and reduce the risk of unexpected outcomes in future experiments.

PHYSICS OF PLASMAS (2023)

Article Physics, Fluids & Plasmas

Exploring the parameter space of MagLIF implosions using similarity scaling. I. Theoretical framework

D. E. Ruiz et al.

Summary: Magneto-inertial fusion concepts, such as the magnetized liner inertial fusion (MagLIF) platform, provide an alternative approach for achieving fusion in the laboratory. Through simplified analytical modeling and non-dimensional analysis, the important parameters characterizing MagLIF implosions are identified and estimated using experimental observations. It is found that MagLIF implosions can be incompletely similarity scaled, allowing exploration of the parameter space and estimation of performance for scaled loads. The subsequent papers in this series test the similarity-scaling theory for MagLIF loads against simulations with different scaling vectors.

PHYSICS OF PLASMAS (2023)

Article Physics, Nuclear

Electrode plasma formation and melt in Z-pinch accelerators

N. Bennett et al.

Summary: Recent studies have shown that electrode plasmas in multi-MA pulsed-power accelerators can reduce efficiency by shunting current upstream from the load. In this study, fully relativistic, Monte Carlo particle-in-cell (PIC) and magnetohydrodynamic (MHD) simulations were performed to examine the generation and evolution of these electrode plasmas at a range of peak currents. The simulations reveal the breakdown of the electrode surface and particle transport prior to electrode melt, as well as the subsequent evolution of the bulk electrode during melt. The findings provide a physical description of plasma formation and melt that can be applied to higher-energy pulsed-power systems.

PHYSICAL REVIEW ACCELERATORS AND BEAMS (2023)

Article Physics, Fluids & Plasmas

Effects and mitigation of pulsed power radiation on optical fiber velocimetry

D. H. Dolan et al.

Summary: Optical fiber diagnostics are widely used in pulsed power experiments, but radiation can affect measurements. Catastrophic fiber darkening can be mitigated with shielding. Radiation-induced refractive index modulations are challenging for optical interferometry.

PHYSICS OF PLASMAS (2022)

Article Chemistry, Physical

Development of a Multiphase Beryllium Equation of State and Physics-based Variations

Christine J. Wu et al.

Summary: A family of beryllium multiphase equation of state models has been constructed to account for different physics-based uncertainties. Through density functional theory (DFT) calculations, new information about EOS properties for high-temperature liquid and high-pressure bcc phases has been obtained to validate the selected models. The baseline EOS predicts specific density properties and transition pressures, while variations are generated to accommodate various sources of uncertainties.

JOURNAL OF PHYSICAL CHEMISTRY A (2021)

Article Physics, Applied

Simultaneous inference of the compressibility and inelastic response of tantalum under extreme loading

W. J. Schill et al.

Summary: The deformation of tantalum under extreme loading conditions was studied using experimental velocity data from Z-machine ramp loading experiments and gas gun compression experiments. Bayesian model calibration was used to infer physically motivated parameters, showing improvement over previous calibrations. Trade-offs between accuracy and transferability were revealed when examining Z-shots and gun-shots together and separately.

JOURNAL OF APPLIED PHYSICS (2021)

Article Physics, Nuclear

Magnetized particle transport in multi-MA accelerators

N. Bennett et al.

Summary: The kinetic simulations of Sandia National Laboratories' Z machine investigate particle transport in a highly magnetized environment. The results show that particles emitted in a space-charge-limited manner have magnetic insulation in the absence of plasma, but are transported across the magnetic field in the presence of plasma. The Hall conductivities are calculated using particle densities and energies, and the parameters that increase the Hall current are related to transmission line inductance.

PHYSICAL REVIEW ACCELERATORS AND BEAMS (2021)

Review Instruments & Instrumentation

Extreme measurements with Photonic Doppler Velocimetry (PDV)

D. H. Dolan

REVIEW OF SCIENTIFIC INSTRUMENTS (2020)

Review Physics, Fluids & Plasmas

Review of pulsed power-driven high energy density physics research on Z at Sandia

D. B. Sinars et al.

PHYSICS OF PLASMAS (2020)

Article Physics, Multidisciplinary

Performance Scaling in Magnetized Liner Inertial Fusion Experiments

M. R. Gomez et al.

PHYSICAL REVIEW LETTERS (2020)

Article Physics, Applied

Development of uncertainty-aware equation-of-state models: Application to copper

S. J. Ali et al.

JOURNAL OF APPLIED PHYSICS (2020)

Article Physics, Nuclear

Fast hybrid particle-in-cell technique for pulsed-power accelerators

D. R. Welch et al.

PHYSICAL REVIEW ACCELERATORS AND BEAMS (2020)

Article Physics, Nuclear

Electrode contaminant plasma effects in 107-A Z pinch accelerators

D. R. Welch et al.

PHYSICAL REVIEW ACCELERATORS AND BEAMS (2019)

Article Physics, Nuclear

Large time-varying inductance load for studying power flow on the Z machine

Andrew Porwitzky et al.

PHYSICAL REVIEW ACCELERATORS AND BEAMS (2019)

Article Physics, Nuclear

Current transport and loss mechanisms in the Z accelerator

N. Bennett et al.

PHYSICAL REVIEW ACCELERATORS AND BEAMS (2019)

Article Physics, Fluids & Plasmas

Design and testing of a magnetically driven implosion peak current diagnostic

M. H. Hess et al.

PHYSICS OF PLASMAS (2018)

Article Physics, Fluids & Plasmas

Uncertainties in cylindrical anode current inferences on pulsed power drivers

Andrew Porwitzky et al.

PHYSICS OF PLASMAS (2018)

Article Physics, Fluids & Plasmas

Detection of an anomalous pressure on a magneto-inertial-fusion load current diagnostic

M. H. Hess et al.

PHYSICS OF PLASMAS (2017)

Article Physics, Fluids & Plasmas

Scaling magnetized liner inertial fusion on Z and future pulsed-power accelerators

S. A. Slutz et al.

PHYSICS OF PLASMAS (2016)

Article Physics, Applied

Magnetically accelerated, ultrahigh velocity flyer plates for shock wave experiments

RW Lemke et al.

JOURNAL OF APPLIED PHYSICS (2005)

Article Physics, Fluids & Plasmas

Characterization of magnetically accelerated flyer plates

RW Lemke et al.

PHYSICS OF PLASMAS (2003)

Article Computer Science, Interdisciplinary Applications

A study of ALE simulations of Rayleigh-Taylor instability

RM Darlington et al.

COMPUTER PHYSICS COMMUNICATIONS (2001)

Article Physics, Applied

Magnetically driven isentropic compression experiments on the Z accelerator

DB Reisman et al.

JOURNAL OF APPLIED PHYSICS (2001)

Article Automation & Control Systems

The Mahalanobis distance

R De Maesschalck et al.

CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS (2000)