Implosion dynamics of triple-nozzle gas-puff z pinches on COBRA

Lavine, E. S.; Rocco, S. V.; Banasek, J. T.; Potter, W. M.; Greenly, J. B.; Wilhelm, H.; Qi, N.; Hammer, D. A.; Kusse, B. R.

doi:10.1063/5.0030936

Implosion dynamics of triple-nozzle gas-puff z pinches on COBRA

Journal Article · Mon Feb 01 23:00:00 EST 2021 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0030936· OSTI ID:1767169

^[1]; ^[2]; Banasek, J. T. ^[2]; Potter, W. M. ^[2]; Greenly, J. B. ^[2]; Wilhelm, H. ^[2]; Qi, N. ^[3]; ^[2]; Kusse, B. R. ^[2]

Cornell Univ., Ithaca, NY (United States); Cornell Univeristy
Cornell Univ., Ithaca, NY (United States)
Cornell Univ., Ithaca, NY (United States); L3 Technology, San Leandro, CA (United States)

Experiments on the 1-MA, 220-ns COBRA generator at Cornell University were conducted to provide detailed measurements of structured cylindrical gas-puff z pinches. In the experiments, a 7 cm diameter triple-nozzle gas valve assembly with concentric outer and inner annular nozzles and a central gas jet initialize the z-pinch load with various working gases, radial density profiles, and externally applied axial magnetic fields. Planar laser-induced fluorescence provides a measure of the initial neutral gas density of the load, while three-frame laser shearing interferometry and multi-frame extreme ultraviolet (XUV) cameras reveal the formation and propagation of a magneto-Rayleigh–Taylor (MRT) unstable shock layer. Implosion trajectories are compared to simple, experimentally informed models and found to be in good agreement. Differences in the structure of the accelerating plasma sheath and evolution of the MRT instability are observed for different gas species and axial magnetic field strengths, correlating with differences in pinch uniformity and x-ray emission. Here, the average instability growth is compared to linear MRT theory predictions using the instantaneous acceleration of the best-fit implosion models and characteristic instability wavelength, with the effective Atwood number and seed perturbation size as fit parameters. For high density argon center jets, ionization prior to the arrival of the imploding plasma sheath suggests a heating mechanism consistent with photoionization by XUV self-emission.

View Accepted Manuscript (DOE)

Research Organization:: Cornell Univ., Ithaca, NY (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003764

OSTI ID:: 1767169

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 28; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (52)

Plasma Focus Radiative Model: Review of the Lee Model Code Lee, S. Journal of Fusion Energy, Vol. 33, Issue 4 https://doi.org/10.1007/s10894-014-9683-8	journal	March 2014
FLYCHK: Generalized population kinetics and spectral model for rapid spectroscopic analysis for all elements Chung, H. -K.; Chen, M. H.; Morgan, W. L. High Energy Density Physics, Vol. 1, Issue 1 https://doi.org/10.1016/j.hedp.2005.07.001	journal	December 2005
The K -shell radiation of a double gas puff z -pinch with an axial magnetic field Chaikovsky, S. A.; Labetsky, A. Yu.; Oreshkin, V. I. Laser and Particle Beams, Vol. 21, Issue 2 https://doi.org/10.1017/S0263034603212143	journal	April 2003
Diamond photoconducting detectors as high power z ‐pinch diagnostics (invited) Spielman, Rick B. Review of Scientific Instruments, Vol. 66, Issue 1 https://doi.org/10.1063/1.1146188	journal	January 1995
A simple air wedge shearing interferometer for studying exploding wires Pikuz, S. A.; Romanova, V. M.; Baryshnikov, N. V. Review of Scientific Instruments, Vol. 72, Issue 1 https://doi.org/10.1063/1.1321746	journal	January 2001
The effect of load thickness on the performance of high velocity, annular Z-pinch implosions Douglas, M. R.; Deeney, C.; Roderick, N. F. Physics of Plasmas, Vol. 8, Issue 1 https://doi.org/10.1063/1.1327618	journal	January 2001
Long-implosion plasma radiation sources using “solid-fill” nozzles Levine, J. S.; Coleman, P. L.; Failor, B. H. Physics of Plasmas, Vol. 8, Issue 2 https://doi.org/10.1063/1.1333696	journal	February 2001
Compressibility effects on the Rayleigh–Taylor instability growth between immiscible fluids Livescu, D. Physics of Fluids, Vol. 16, Issue 1 https://doi.org/10.1063/1.1630800	journal	January 2004
Rayleigh-Taylor Instabilities of a Collapsing Cylindrical Shell in a Magnetic Field Harris, E. G. Physics of Fluids, Vol. 5, Issue 9 https://doi.org/10.1063/1.1724473	journal	January 1962
Extreme ultraviolet imaging of wire array z-pinch experiments Bland, S. N.; Ampleford, D. J.; Bott, S. C. Review of Scientific Instruments, Vol. 75, Issue 10 https://doi.org/10.1063/1.1787926	journal	October 2004
Implosion dynamics and radiative characteristics of a high yield structured gas puff load Levine, J. S.; Banister, J. W.; Failor, B. H. Physics of Plasmas, Vol. 13, Issue 8 https://doi.org/10.1063/1.2221660	journal	August 2006
Magnetic Rayleigh–Taylor instability mitigation in large-diameter gas puff Z-pinch implosions Qi, N.; Sze, H.; Failor, B. H. Physics of Plasmas, Vol. 15, Issue 2 https://doi.org/10.1063/1.2839346	journal	February 2008
A 1MA, variable risetime pulse generator for high energy density plasma research Greenly, J. B.; Douglas, J. D.; Hammer, D. A. Review of Scientific Instruments, Vol. 79, Issue 7 https://doi.org/10.1063/1.2949819	journal	July 2008
Evaluation of the sensitivity and fading characteristics of an image plate system for x-ray diagnostics Meadowcroft, A. L.; Bentley, C. D.; Stott, E. N. Review of Scientific Instruments, Vol. 79, Issue 11 https://doi.org/10.1063/1.3013123	journal	November 2008
Scaling of (MHD) instabilities in imploding plasma liners Hussey, T. W.; Roderick, N. F.; Kloc, D. A. Journal of Applied Physics, Vol. 51, Issue 3 https://doi.org/10.1063/1.327792	journal	March 1980
A model for the saturation of the hydromagnetic Rayleigh–Taylor instability Roderick, N. F.; Hussey, T. W. Journal of Applied Physics, Vol. 56, Issue 5 https://doi.org/10.1063/1.334137	journal	September 1984
Measurements of magneto-Rayleigh–Taylor instability growth during the implosion of initially solid metal liners Sinars, D. B.; Slutz, S. A.; Herrmann, M. C. Physics of Plasmas, Vol. 18, Issue 5 https://doi.org/10.1063/1.3560911	journal	May 2011
Study of gas-puff Z-pinches on COBRA Qi, N.; Rosenberg, E. W.; Gourdain, P. A. Physics of Plasmas, Vol. 21, Issue 11 https://doi.org/10.1063/1.4900748	journal	November 2014
Temporal evolution of surface ripples on a finite plasma slab subject to the magneto-Rayleigh-Taylor instability Weis, M. R.; Zhang, P.; Lau, Y. Y. Physics of Plasmas, Vol. 21, Issue 12 https://doi.org/10.1063/1.4904210	journal	December 2014
Characterization of the COBRA triple-nozzle gas-puff valve using planar laser induced fluorescence de Grouchy, P. W. L.; Rosenberg, E.; Qi, N. 9TH INTERNATIONAL CONFERENCE ON DENSE Z PINCHES, AIP Conference Proceedings https://doi.org/10.1063/1.4904773	conference	January 2014
Gas puff Z-pinch implosions with external Bz field on COBRA Qi, N.; de Grouchy, P.; Schrafel, P. C. 9TH INTERNATIONAL CONFERENCE ON DENSE Z PINCHES, AIP Conference Proceedings https://doi.org/10.1063/1.4904775	conference	January 2014
Analytic model for the dynamic Z-pinch Piriz, A. R.; Sun, Y. B.; Tahir, N. A. Physics of Plasmas, Vol. 22, Issue 6 https://doi.org/10.1063/1.4922078	journal	June 2015
Radiative properties of argon gas puff z-pinch implosions on COBRA Ouart, N. D.; de Grouchy, P. W. L.; Qi, N. Physics of Plasmas, Vol. 23, Issue 10 https://doi.org/10.1063/1.4965244	journal	October 2016
Evolution of sausage and helical modes in magnetized thin-foil cylindrical liners driven by a Z-pinch Yager-Elorriaga, D. A.; Lau, Y. Y.; Zhang, P. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5017849	journal	May 2018
Observations of the magneto-Rayleigh-Taylor instability and shock dynamics in gas-puff Z-pinch experiments de Grouchy, P. W. L.; Kusse, B. R.; Banasek, J. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5032084	journal	July 2018
Time-resolved and multiple-angle Thomson scattering on gas-puff Z-Pinch plasmas at pinch time Rocco, Sophia V. R.; Banasek, Jacob T.; Potter, William M. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038879	journal	October 2018
One-dimensional theory and simulations of the dynamic Z-pinch Angus, J. R.; Link, A. J.; Schmidt, A. E. W. Physics of Plasmas, Vol. 27, Issue 1 https://doi.org/10.1063/1.5104340	journal	January 2020
Study of stability in a liner-on-target gas puff Z-pinch as a function of pre-embedded axial magnetic field Conti, F.; Aybar, N.; Narkis, J. Physics of Plasmas, Vol. 27, Issue 1 https://doi.org/10.1063/1.5131170	journal	January 2020
Recent ACE 4 Z-pinch experiments: Long implosion time argon loads, uniform fill versus annular shell distributions and the Rayleigh-Taylor instability problem Coleman, P.; Rauch, J.; Rix, W. The fourth international conference on dense z-pinches https://doi.org/10.1063/1.53816	conference	January 1997
Stability analysis of dynamic Z pinches and theta pinches Bud’ko, A. B.; Felber, F. S.; Kleev, A. I. Physics of Fluids B: Plasma Physics, Vol. 1, Issue 3 https://doi.org/10.1063/1.859207	journal	March 1989
Suppression of Rayleigh–Taylor instability by the snowplow mechanism Gol’berg, S. M.; Velikovich, A. L. Physics of Fluids B: Plasma Physics, Vol. 5, Issue 4 https://doi.org/10.1063/1.860974	journal	April 1993
Diffusion of magnetic field into an expanding plasma shell Hussey, Thomas W. Physics of Fluids, Vol. 24, Issue 7 https://doi.org/10.1063/1.863517	journal	January 1981
A heuristic model for the nonlinear Rayleigh–Taylor instability in fast Z pinches Hussey, T. W.; Roderick, N. F.; Shumlak, U. Physics of Plasmas, Vol. 2, Issue 6 https://doi.org/10.1063/1.871292	journal	June 1995
Suppression of the Rayleigh–Taylor instability through accretion Book, David L. Physics of Plasmas, Vol. 3, Issue 1 https://doi.org/10.1063/1.871859	journal	January 1996
Growth of the Rayleigh–Taylor instability in an imploding Z-pinch De Groot, J. S.; Toor, A.; Golberg, S. M. Physics of Plasmas, Vol. 4, Issue 3 https://doi.org/10.1063/1.872168	journal	March 1997
Computational investigation of single mode vs multimode Rayleigh–Taylor seeding in Z-pinch implosions Douglas, M. R.; Deeney, C.; Roderick, N. F. Physics of Plasmas, Vol. 5, Issue 12 https://doi.org/10.1063/1.873153	journal	December 1998
Long time implosion experiments with double gas puffs Shishlov, A. V.; Baksht, R. B.; Fedunin, A. V. Physics of Plasmas, Vol. 7, Issue 4 https://doi.org/10.1063/1.873936	journal	April 2000
The formation of high-density z-pinches Potter, D. Nuclear Fusion, Vol. 18, Issue 6 https://doi.org/10.1088/0029-5515/18/6/008	journal	June 1978
Initial magnetic field compression studies using gas-puff Z -pinches and thin liners on COBRA Gourdain, P. -A.; Concepcion, R. J.; Evans, M. T. Nuclear Fusion, Vol. 53, Issue 8 https://doi.org/10.1088/0029-5515/53/8/083006	journal	July 2013
Measurements of the spatial magnetic field distribution in a z-pinch plasma throughout the stagnation process Rosenzweig, G.; Kroupp, E.; Fisher, A. Journal of Instrumentation, Vol. 12, Issue 09 https://doi.org/10.1088/1748-0221/12/09/P09004	journal	September 2017
Analytic solutions for Rayleigh-Taylor growth rates in smooth density gradients Munro, David H. Physical Review A, Vol. 38, Issue 3 https://doi.org/10.1103/PhysRevA.38.1433	journal	August 1988
Dynamics of cylindrically converging precursor plasma flow in wire-array Z -pinch experiments Bott, S. C.; Lebedev, S. V.; Ampleford, D. J. Physical Review E, Vol. 74, Issue 4 https://doi.org/10.1103/PhysRevE.74.046403	journal	October 2006
High-Gain Magnetized Inertial Fusion Slutz, Stephen A.; Vesey, Roger A. Physical Review Letters, Vol. 108, Issue 2 https://doi.org/10.1103/PhysRevLett.108.025003	journal	January 2012
Suppression of Rayleigh-Taylor Instability in Z -Pinch Loads with Tailored Density Profiles Velikovich, Alexander L.; Cochran, F. L.; Davis, J. Physical Review Letters, Vol. 77, Issue 5 https://doi.org/10.1103/PhysRevLett.77.853	journal	July 1996
Efficient Radiation Production in Long Implosions of Structured Gas-Puff Z Pinch Loads from Large Initial Radius Sze, H.; Banister, J.; Failor, B. H. Physical Review Letters, Vol. 95, Issue 10 https://doi.org/10.1103/PhysRevLett.95.105001	journal	September 2005
The physics of fast Z pinches Ryutov, D. D.; Derzon, M. S.; Matzen, M. K. Reviews of Modern Physics, Vol. 72, Issue 1 https://doi.org/10.1103/RevModPhys.72.167	journal	January 2000
Z pinch imploding plasma density profile measurements using a two-frame laser shearing interferometer No authors listed IEEE Transactions on Plasma Science, Vol. 30, Issue 1 https://doi.org/10.1109/TPS.2002.1003865	journal	February 2002
Anode–Cathode Asymmetry in a Wire-Array $Z$-Pinch: Highly Resolved Axial-Shear-Flow Structure Observed on the Outer Edges of Ablating Wires McBride, Ryan D.; Seyler, Charles E.; Pikuz, Sergei A. IEEE Transactions on Plasma Science, Vol. 39, Issue 11 https://doi.org/10.1109/TPS.2011.2163732	journal	November 2011
A Review of the Gas-Puff $Z$ -Pinch as an X-Ray and Neutron Source Giuliani, J. L.; Commisso, R. J. IEEE Transactions on Plasma Science, Vol. 43, Issue 8 https://doi.org/10.1109/TPS.2015.2451157	journal	August 2015
Study of Triple Ar Gas Puff Z-Pinches on 0.9-MA, 200-ns COBRA Qi, N.; Rocco, S. V.; Engelbrecht, J. IEEE Transactions on Plasma Science, Vol. 46, Issue 11 https://doi.org/10.1109/TPS.2018.2873663	journal	November 2018
Formation of tight plasma pinches and generation of high-power soft x-ray radiation pulses in fast Z-pinch implosions Shishlov, A. V.; Baksht, R. B.; Chaikovsky, S. A. Laser Physics, Vol. 16, Issue 1 https://doi.org/10.1134/S1054660X06010178	journal	January 2006
Absorption Cross Sections of Argon and Methane between 600 and 170 Å Rustgi, Om Prakash Journal of the Optical Society of America, Vol. 54, Issue 4 https://doi.org/10.1364/JOSA.54.000464	journal	January 1964

Similar Records

Study of Triple Ar Gas Puff Z-Pinches on 0.9-MA, 200-ns COBRA

Journal Article · Mon Oct 22 00:00:00 EDT 2018 · IEEE Transactions on Plasma Science · OSTI ID:1475190

Measurements of the imploding plasma sheath in triple-nozzle gas-puff z pinches

Journal Article · Wed Jun 01 00:00:00 EDT 2022 · Physics of Plasmas · OSTI ID:1870636

Study of gas-puff Z-pinches on COBRA

Journal Article · Fri Nov 14 23:00:00 EST 2014 · Physics of Plasmas · OSTI ID:22403274

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Accelerated plasmas
Flow visualization
Fluid mechanics
Fourier analysis
Gas jet
Interferometry
Photoionization
Plasma confinement
Plasma sheaths
Thermodynamic properties

Implosion dynamics of triple-nozzle gas-puff z pinches on COBRA

Citation Formats

References (52)

Similar Records

Related Subjects