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Continuum Hard-Photon K-Shell Yields From Z-Pinch Implosions: Present Status and Scaling to Higher Currents
Alexander L. Velikovich;Nicholas D. Ouart;Arati Dasgupta;John L. Giuliani;Varun Tangri;Adam J. Harvey-Thompson;Marc-Andre Schaeuble;Jens Schwarz;Clayton E. Myers;David J. Ampleford;Roger A. Vesey;Brent Jones
The use of the recombination continuum for X-ray radiation production in Z-pinches is discussed as an option for generating high yields in the warm photon energy range, \hslash \omega \gt 10 keV. The free-bound direct-recombination continuum emission is an inherently weaker radiation production mechanism than the resonant-line emission. However, it is challenging, if at all possible, to heat s...Show More
Continuum Hard-Photon K-Shell Yields From Z-Pinch Implosions: Present Status and Scaling to Higher Currents
Alexander L. Velikovich;Nicholas D. Ouart;Arati Dasgupta;John L. Giuliani;Varun Tangri;Adam J. Harvey-Thompson;Marc-Andre Schaeuble;Jens Schwarz;Clayton E. Myers;David J. Ampleford;Roger A. Vesey;Brent Jones
Domination of the K-Radiation at a Z-Pinch Stagnation on Z by Numerous Tiny Spots and the Properties of the Spots Inferred by Experimental Determination of the K-Line Opacities
Y. Maron;V. Bernshtam;Y. Zarnitsky;V. Fisher;O. Nedostup;D. J. Ampleford;C. A. Jennings;B. Jones;M. E. Cuneo;G. A. Rochau;G. S. Dunham;G. P. Loisel
2022 IEEE International Conference on Plasma Science (ICOPS)
Year: 2022 | Conference Paper |
Detailed analysis of both the line-intensity ratios and line shapes of the K-lines of elements of different abundances (Fe, Cr, Ni, and Mn) emitted from the stagnation of a steel wire-array implosion on Z, were used to determine the line opacities. While the opacities at the early time of stagnation appear to be consistent with a nearly uniform hot-plasma cylinder on-axis surrounded by a colder an...Show More
Domination of the K-Radiation at a Z-Pinch Stagnation on Z by Numerous Tiny Spots and the Properties of the Spots Inferred by Experimental Determination of the K-Line Opacities
Y. Maron;V. Bernshtam;Y. Zarnitsky;V. Fisher;O. Nedostup;D. J. Ampleford;C. A. Jennings;B. Jones;M. E. Cuneo;G. A. Rochau;G. S. Dunham;G. P. Loisel
Year: 2022 | Conference Paper |
Scaling of Efficient ar K-Shell Emission From Fast Gas-Puff Z-Pinches in the 10 to 100 Ma Current Range
V. Tangri;J. L. Giuliani;A. Dasgupta;A. L. Velikovich;N. D. Ouart;M.-A. Schaeuble;J. Schwarz;D. J. Ampleford;R. Vesey;B. M. Jones
2022 IEEE International Conference on Plasma Science (ICOPS)
Year: 2022 | Conference Paper |
Results of recent simulations of argon double-shell gas-puff Z-pinch implosions performed at NRL using MACH2-TCRE code in the efficient and inefficient regime are presented. This code was successfully used for modeling argon gas-puff implosions with various load configuration and diagnostic dopant options on Z facility. [1] , [2] Results presented will cover a large set of simulations in the high-...Show More
Bright-Spot Contributions to Hardphoton Continuum K-Shell Yield from Argon and Stainless-Steel Load Implosions on Z
A. L. Velikovich;N. D. Ouart;A. Dasgupta;J. L. Giuliani;V. Tangri;A. J. Harvey-Thompson;M.-A. Schaeuble;J. Schwarz;C. Myers;D. J. Ampleford;R. Vesey;B. M. Jones;Y. Maron
2022 IEEE International Conference on Plasma Science (ICOPS)
Year: 2022 | Conference Paper |
In Z-pinch implosions, K-shell radiation often comes from isolated bright spots, whose density and/or temperature significantly differ from the background plasma parameters [1] - [3] . The prominence of bright spots in many radiating materials raises questions about the applicability of the analytical [4] and numerical predictions of K-shell yields that do not accurately describe small-scale radia...Show More
Bright-Spot Contributions to Hardphoton Continuum K-Shell Yield from Argon and Stainless-Steel Load Implosions on Z
A. L. Velikovich;N. D. Ouart;A. Dasgupta;J. L. Giuliani;V. Tangri;A. J. Harvey-Thompson;M.-A. Schaeuble;J. Schwarz;C. Myers;D. J. Ampleford;R. Vesey;B. M. Jones;Y. Maron
Year: 2022 | Conference Paper |
Time-Dependent Non-LTE Level Kinetics in 1-D MHD Simulations of an Argon Gas Puff Implosion
N. D. Ouart;A. Dasgupta;J. L. Giuliani;A. L. Velikovich;V. Tangri;M.-A. Schaeuble;J. Schwarz;D. J. Ampleford;R. Vesey;C. Jennings;B. M. Jones
2022 IEEE International Conference on Plasma Science (ICOPS)
Year: 2022 | Conference Paper |
The Z machine has produced bright x-ray sources by imploding gas puff or wire array loads. A frequently fielded argon gas puff platform has a 1:1.6 outer-to-inner mass profile from an 8cm dia. nozzle, 1.0mg/cm mass, and a 2.5cm height. These experiments produce similar x-ray powers and K-shell yields >300 kJ [1] . The 2-D MHD Mach2+TCRE code reproduced the measured powers, yields, and emission reg...Show More
Progress in the Refining of the K-Shell Yield Scaling Model for Z-Pinch Plasma Radiation Sources
A. Esaulov;A. L. Velikovich;V. Tangri;J. L. Giuliani;N. D. Ouart;A. Dasgupta;J. Schwarz;R. Vesey;D. J. Ampleford;M.-A. Schaeuble;B. M. Jones
2022 IEEE International Conference on Plasma Science (ICOPS)
Year: 2022 | Conference Paper |
Analytical scaling models of K-shell radiation yield from the imploding Z-pinch plasma radiation sources (PRS) have been advanced at NRL. Those developed by Mosher-Krishnan-Qi, MKQ [1] , and Thornhill-Whitney-Giuliani, TWG [2] , are the best-known and most helpful. They predict the K-shell yield as a function of input parameters, such as load mass and the energy coupled to the radiating plasma. Th...Show More
Continuum Hard-Photon K-Shell Yields from Z-Pinch Implosions: Present Status and Scaling to Higher Currents
A. L. Velikovich;N. D. Ouart;A. Dasgupta;J. L. Giuliani;V. Tangri;A. J. Harvey-Thompson;M.-A. Schaeuble;J. Schwarz;C. E. Myers;D. J. Ampleford;R. A. Vesey;B. Jones
2021 IEEE International Conference on Plasma Science (ICOPS)
Year: 2021 | Conference Paper |
The use of the recombination continuum for x-ray radiation production in Z pinches has been discussed as an option 1 for generating high yields in the warm photon energy range, ħω > 13 keV. The free-bound continuum emission is an inherently weaker radiation production mechanism than K-shell line emission. But it is challenging, if at all possible, to heat stagnated Z-pinch plasmas with atomic numb...Show More
Continuum Hard-Photon K-Shell Yields from Z-Pinch Implosions: Present Status and Scaling to Higher Currents
A. L. Velikovich;N. D. Ouart;A. Dasgupta;J. L. Giuliani;V. Tangri;A. J. Harvey-Thompson;M.-A. Schaeuble;J. Schwarz;C. E. Myers;D. J. Ampleford;R. A. Vesey;B. Jones
Year: 2021 | Conference Paper |
A model for K-shell x-ray yield from magnetic implosions at Sandia's Z machine
Jens Schwarz;Roger A. Vesey;David J. Ampleford;Marc-Andre Schaeuble;Brent Jones;Alexander L. Velikovich;John L. Giuliani;Varun Tangri;Nicholas D. Ouart;Arati Dasgupta
2021 IEEE International Conference on Plasma Science (ICOPS)
Year: 2021 | Conference Paper |
Investigation of CH foams doped with titanium as a cold x-ray source alternative
N.D. Ouart;A. Dasgupta;A.L. Velikovich;J.L Giuliani;V. Tangri;M.-A. Schaeuble;J. Schwarz;D. Ampleford;R.A. Vesey;B. Jones
2021 IEEE International Conference on Plasma Science (ICOPS)
Year: 2021 | Conference Paper |
Implosions of wire array and gas puff loads on pulsed power facilities, such as the Z machine at Sandia National Laboratories, have been successful in producing 1-10 keV soft x-ray sources. Titanium wire array loads imploded on Z have produced ~100 kJ of 4.8 keV x-rays 1,2 . We present here medium- and high-atomic-number-material doped plastic foams as an alternative load concept for producing col...Show More
Scaling of Efficient AR K-Shell Emission From Fast Gas-Puff Z-Pinches in the 10 to 100 MA Current Range
V. Tangri;J. L. Giuliani Voluntary Emeritus Program;A. Dasgupta;A. L. Velikovich;N. D. Ouart;M.-A. Schaeuble;J. Schwarz;D. J. Ampleford;R. A. Vesey;B. Jones
2021 IEEE International Conference on Plasma Science (ICOPS)
Year: 2021 | Conference Paper |
Results of recent simulations of argon double-shell gas-puff Z-pinch implosions performed at NRL using MACH2-TCRE code are presented. This code was successfully used for modeling argon gas-puff implosions with various load configuration and diagnostic dopant options on Z facility. 1 , 2 The new effort has been focused on performing a large set of high-current (10 MA to 100 MA) simulations spanning...Show More
Assessing Stagnation Conditions and Identifying Trends in Magnetized Liner Inertial Fusion
Matthew R. Gomez;Stephen A. Slutz;Patrick F. Knapp;Kelly D. Hahn;Matthew R. Weis;Eric C. Harding;Matthias Geissel;Jeffrey R. Fein;Michael E. Glinsky;Stephanie B. Hansen;Adam J. Harvey-Thompson;Christopher A. Jennings;Ian C. Smith;Daniel Woodbury;David J. Ampleford;Thomas J. Awe;Gordon A. Chandler;Mark H. Hess;Derek C. Lamppa;Clayton E. Myers;Carlos L. Ruiz;Adam B. Sefkow;Jens Schwarz;David A. Yager-Elorriaga;Brent Jones;John L. Porter;Kyle J. Peterson;Ryan D. Mcbride;Gregory A. Rochau;Daniel B. Sinars
Magnetized Liner Inertial Fusion (MagLIF) is a magneto-inertial fusion concept, which is presently being studied on the Z Pulsed Power Facility. The concept utilizes an axial magnetic field and laser heating to produce fusion-relevant conditions at stagnation despite a peak magnetically driven implosion velocity of less than 100 km/s. Initial experiments demonstrated the viability of the concept b...Show More
Assessing Stagnation Conditions and Identifying Trends in Magnetized Liner Inertial Fusion
Matthew R. Gomez;Stephen A. Slutz;Patrick F. Knapp;Kelly D. Hahn;Matthew R. Weis;Eric C. Harding;Matthias Geissel;Jeffrey R. Fein;Michael E. Glinsky;Stephanie B. Hansen;Adam J. Harvey-Thompson;Christopher A. Jennings;Ian C. Smith;Daniel Woodbury;David J. Ampleford;Thomas J. Awe;Gordon A. Chandler;Mark H. Hess;Derek C. Lamppa;Clayton E. Myers;Carlos L. Ruiz;Adam B. Sefkow;Jens Schwarz;David A. Yager-Elorriaga;Brent Jones;John L. Porter;Kyle J. Peterson;Ryan D. Mcbride;Gregory A. Rochau;Daniel B. Sinars
Simulations of an Argon Z-Pinch Implosion with Time-Dependent Non-LTE Population Kinetics
N.D. Ouart;A. Dasgupta;J.L. Giuliani;B. Jones;D.J. Ampleford;A. Harvey-Thompson;C. Jennings;R.W. Clark;V. Tangri
2018 IEEE International Conference on Plasma Science (ICOPS)
Year: 2018 | Conference Paper |
Three argon gas-puff implosions were performed on the Z-machine at Sandia National Laboratories. These three loads had the same density profile from an 8 cm diameter nozzle, a 1 mg/cm mass, and had a 2.5 cm length. The experiments produced similar K-shell radiative power pulses and yields [1]. Simulations with the 2-D Radiation MHD code Mach2 were able to reproduce the experimental K-shell powers,...Show More
Simulations of Recent Argon Gas-Puff Implosions on Z With Xe and Kr Dopants
Varun Tangri;John L. Giuliani;Alexander L. Velikovich;Nicholas Ouart;Arati Dasgupta;John P. Apruzese;A. J. Harvey-Thompson;C. A. Jennings;Brent Jones
An intriguing result is that a small fraction of Xe (0.8% by number in the center jet) can have a significant impact on the emitted K-shell radiation in an Ar gas-puff implosion. This result was recently obtained from a pair of experiments on Sandia National Laboratories Z machine. These shots were Z2603 (with Xe) and Z2605 (without Xe). The pair had similar initial density profiles (outer shell, ...Show More
Simulations of Gas Puff Z-Pinch Implosions With a Xe Dopant
V. Tangri;J.L. Giuliani;A.L. Velikovich;N.D. Ouart;A. Dasgupta;J.P. Apruzese;A. J. Harvey-Thompson;C.A. Jennings;B. Jones
2017 IEEE International Conference on Plasma Science (ICOPS)
Year: 2017 | Conference Paper |
Results from a pair of recent experiments 1 on Sandia National Laboratories’ Z machine have shown that the presence of a small fraction of Xe (0.8% by number in the center jet) in an Ar gas puff shot can have a significant impact on the emitted K-shell radiation. This pair consisted of shots with similar initial density profile (outer shell, inner shell, and center jet) but one with Xe dopant in t...Show More
Conceptual design of a 960-TW accelerator powered by impedance-matched Marx generators
W. Stygar;K. Austin;T. Awe;J. Bailey;E. Breden;G. Brent;J. Calhoun;M. Campbell;R. Clark;R. Cooper;M. Cuneo;J. Edwards;J. Ennis;R. Gilgenbach;M. Gomez;P. Gourdain;G. Greiser;F. Gruner;J. Hammer;M. Herrmann;M. Hess;B. Hutsel;C. Jennings;D. Jobe;O. Johns;B. Jones;M. Jones;P. Jones;K. Keilholtz;P. Knapp;G. Laity;D. Lamppa;K. LeChien;J. Leckbee;S. Lewis;D. Lucero;M. Martin;K.K. Matzen;M. Mazarakis;R. McBride;R. McKee;J. Moore;C. Mostrom;T. Mulville;D. Muron;K. Peterson;D. Pilkington;J. Porter;K. Raman;G. Rochau;D. Rose;M. Savage;M. Sceiford;P. Schmit;R. Schneider;D. Sinars;S. Slutz;R. Spielman;B. Stoltzfus;C. Verdon;R. Vesey;E. Waisman;E. Weinbrecht;D. Welch;M. Wisher
2017 IEEE 21st International Conference on Pulsed Power (PPC)
Year: 2017 | Conference Paper |
Cited by: Papers (8)
We have developed a conceptual design of a next-generation pulsed-power accelerator that is optimized for advanced high-energy-density-physics experiments. The prime power source of the machine consists of 210 impedance-matched Marx generators (IMGs). Each IMG drives a 150-ns-long coaxial-transmission-line impedance transformer. The coaxial lines provide a minimum of 300 ns of transit-time isolati...Show More
Conceptual design of a 960-TW accelerator powered by impedance-matched Marx generators
W. Stygar;K. Austin;T. Awe;J. Bailey;E. Breden;G. Brent;J. Calhoun;M. Campbell;R. Clark;R. Cooper;M. Cuneo;J. Edwards;J. Ennis;R. Gilgenbach;M. Gomez;P. Gourdain;G. Greiser;F. Gruner;J. Hammer;M. Herrmann;M. Hess;B. Hutsel;C. Jennings;D. Jobe;O. Johns;B. Jones;M. Jones;P. Jones;K. Keilholtz;P. Knapp;G. Laity;D. Lamppa;K. LeChien;J. Leckbee;S. Lewis;D. Lucero;M. Martin;K.K. Matzen;M. Mazarakis;R. McBride;R. McKee;J. Moore;C. Mostrom;T. Mulville;D. Muron;K. Peterson;D. Pilkington;J. Porter;K. Raman;G. Rochau;D. Rose;M. Savage;M. Sceiford;P. Schmit;R. Schneider;D. Sinars;S. Slutz;R. Spielman;B. Stoltzfus;C. Verdon;R. Vesey;E. Waisman;E. Weinbrecht;D. Welch;M. Wisher
Year: 2017 | Conference Paper |
Effects of a Xe dopant on an Ar gas-puff implosion on Z
J. P. Apruzese;J. L. Giuliani;N. D. Ouart;V. Tangri;A. J. Harvey-Thompson;B. Jones;C. A. Jennings
2016 IEEE International Conference on Plasma Science (ICOPS)
Year: 2016 | Conference Paper |
Two Ar gas-puff experiments, each using loads consisting of two annuli and a center jet, were recently performed on Sandia National Laboratories' Z machine. These shots had the same load except that one of them (Z2603) employed a Xe dopant of 0.8% by number in the jet, which was not present in the otherwise identical Z2605. The extensive diagnostics deployed in these experiments reveal that the pr...Show More
Investigating Radial Wire Array $Z$ -Pinches as a Compact X-Ray Source on the Saturn Generator
David J. Ampleford;Simon N. Bland;Christopher A. Jennings;Sergey V. Lebedev;Jeremy P. Chittenden;Ryan D. McBride;Brent Jones;Jason D. Serrano;Michael E. Cuneo;Gareth N. Hall;Francisco Suzuki-Vidal;Simon C. Bott-Suzuki
Radial wire array Z-pinches, where wires are positioned radially outward from a central cathode to a concentric anode, can act as a compact bright X-ray source that could potentially be used to drive a hohlraum. Experiments were performed on the 7-MA Saturn generator using radial wire arrays. These experiments studied a number of potential risks in scaling radial wire arrays up from the 1-MA level...Show More
Investigating Radial Wire Array $Z$ -Pinches as a Compact X-Ray Source on the Saturn Generator
David J. Ampleford;Simon N. Bland;Christopher A. Jennings;Sergey V. Lebedev;Jeremy P. Chittenden;Ryan D. McBride;Brent Jones;Jason D. Serrano;Michael E. Cuneo;Gareth N. Hall;Francisco Suzuki-Vidal;Simon C. Bott-Suzuki
Double and single planar wire arrays at high and low impedance university-scale generators
A. S. Safronova;V. L. Kantsyrev;M. E. Weller;V. V. Shlyaptseva;I. Shrestha;A. Stafford;M. Lorance;M. Cooper;S. G. Patel;A. M. Steiner;D. A. Yager-Elorriaga;N. M. Jordan;R. M. Gilgenbach;C. A. Coverdale;B. Jones;K. M. Williamson;A. S. Chuvatin
2015 IEEE International Conference on Plasma Sciences (ICOPS)
Year: 2015 | Conference Paper |
Single Planar Wire Arrays (SPWA) and Double Planar Wire Arrays (DPWA), which consist of one or two parallel rows of wires, respectively, have demonstrated high radiation efficiency (up to 30 kJ), compact size (1.5-3 mm), and usefulness for various applications in experiments on the high-impedance Zebra (1.9Ω, 1 MA, 100 ns). For example, DPWAs are very suitable for the new compact multi-source hohl...Show More
Double and single planar wire arrays at high and low impedance university-scale generators
A. S. Safronova;V. L. Kantsyrev;M. E. Weller;V. V. Shlyaptseva;I. Shrestha;A. Stafford;M. Lorance;M. Cooper;S. G. Patel;A. M. Steiner;D. A. Yager-Elorriaga;N. M. Jordan;R. M. Gilgenbach;C. A. Coverdale;B. Jones;K. M. Williamson;A. S. Chuvatin
Year: 2015 | Conference Paper |
2-D RMHD Modeling Assessment of Current Flow, Plasma Conditions, and Doppler Effects in Recent Z Argon Experiments
J. Ward Thornhill;John L. Giuliani;Brent Jones;John P. Apruzese;Arati Dasgupta;Young K. Chong;Adam J. Harvey-Thompson;David J. Ampleford;Stephanie B. Hansen;Christine A. Coverdale;Christopher A. Jennings;Gregory A. Rochau;Michael E. Cuneo;Derek C. Lamppa;Drew Johnson;Michael C. Jones;Nathan W. Moore;Eduardo M. Waisman;Mahadevan Krishnan;Philip L. Coleman
By varying current-loss circuit parameters, the Mach2-tabular collisional radiative equilibrium 2-D radiation magnetohydrodynamic model was tuned to reproduce the radiative and electrical properties of three recent argon gas-puff experiments (same initial conditions) performed on the Z machine at Sandia National Laboratories. The model indicates that there were current losses occurring near or wit...Show More
2-D RMHD Modeling Assessment of Current Flow, Plasma Conditions, and Doppler Effects in Recent Z Argon Experiments
J. Ward Thornhill;John L. Giuliani;Brent Jones;John P. Apruzese;Arati Dasgupta;Young K. Chong;Adam J. Harvey-Thompson;David J. Ampleford;Stephanie B. Hansen;Christine A. Coverdale;Christopher A. Jennings;Gregory A. Rochau;Michael E. Cuneo;Derek C. Lamppa;Drew Johnson;Michael C. Jones;Nathan W. Moore;Eduardo M. Waisman;Mahadevan Krishnan;Philip L. Coleman
Wire-Array Z-Pinch Length Variations for K-Shell X-Ray Generation on Z
Brent Jones;David J. Ampleford;Christopher A. Jennings;Eduardo M. Waisman;Stephanie B. Hansen;Christine A. Coverdale;Michael E. Cuneo;John P. Apruzese;J. Ward Thornhill;John L. Giuliani;Arati Dasgupta;Robert W. Clark;Jack Davis
In developing stainless-steel (SS) and copper wire-array X-ray sources on the Z machine, we consider the optimization of K-shell yield as a function of load height. Theory, numerical modeling, and experimental data suggest that an optimum exists corresponding to a tradeoff between the increase in radiating mass and the decrease in coupled current with increasing pinch height. A typical load height...Show More
Synthetic time and space resolved spectra including doppler splitting from simulations of stainless steel and argon pinches on Z
J. W. Thornhill;J. L. Giuliani;J. P. Apruzese;A. Dasgupta;Y. K Chong;B. Jones;D. J. Ampleford;A. J. Harvey-Thompson;S. B. Hansen;C. A. Coverdale;C. A. Jennings;G. A. Rochau;M. E. Cuneo
A two-dimensional radiation MHD model that includes a self-consistent calculation for non-local thermodynamic equilibrium kinetics and ray-trace radiation transport1 is employed to simulate 65 mm diameter stainless steel double wire array Z machine experiments of 5.0 mg - shot Z1859 and 2.5 mg - shot Z1860 as well as 8 cm diameter, 2.5 mg, argon gas-puff experiments, shots Z2259 - Z2261. Temporal ...Show More
Synthetic time and space resolved spectra including doppler splitting from simulations of stainless steel and argon pinches on Z
J. W. Thornhill;J. L. Giuliani;J. P. Apruzese;A. Dasgupta;Y. K Chong;B. Jones;D. J. Ampleford;A. J. Harvey-Thompson;S. B. Hansen;C. A. Coverdale;C. A. Jennings;G. A. Rochau;M. E. Cuneo
Double planar wire arrays at enhanced current on Zebra
A.S. Safronova;V.L. Kantsyrev;I. Shrestha;M.E. Weller;V.V. Shlyaptseva;A. Stafford;M. Lorance;A.A. Esaulov;A.S. Chuvatin;C.A. Coverdale;B. Jones;D.J. Ampleford
Double Planar Wire Arrays (DPWA), which consist of two parallel rows of wires, have demonstrated high radiation efficiency (up to 30 kJ), compact size (1.5-3 mm), and pulse shaping capabilities in experiments at 1 MA Zebra. DPWAs are also very suitable for the new compact multi-source hohlraum concept. It was shown that their implosion dynamics strongly depends on the critical load parameter, the ...Show More
Scaling and enhancement of non-thermal line emission on z to hν ∼ 22 kev
D.J. Ampleford;S.B. Hansen;C.A. Jennings;B. Jones;T.C. Webb;V. Harper-Slaboszewicz;M.E. Cuneo;G.A. Rochau;C.A. Coverdale;A.J. Harvey-Thompson;D.B. Sinars;J.K. Moore;T.M. Flanagan;N. Ouart;A. Dasgupta;J. Giuliani;A.L. Velikovich;J.P. Apruzese;J.P. Chittenden;N. Niasse;B. Appelbe
We report on experiments demonstrating the transition from thermally-dominated K-shell line emission to non-thermal, hot-electron-driven inner-shell emission for z pinch plasmas on the Z machine. We find preferential scaling of non-thermal line emission for atomic number Z=42 and higher (hν ≥ 17keV). Initial experiments with Mo (Z=42) and Ag (Z=47) have produced kJ-level emission in the 17-keV and...Show More
Scaling and enhancement of non-thermal line emission on z to hν ∼ 22 kev
D.J. Ampleford;S.B. Hansen;C.A. Jennings;B. Jones;T.C. Webb;V. Harper-Slaboszewicz;M.E. Cuneo;G.A. Rochau;C.A. Coverdale;A.J. Harvey-Thompson;D.B. Sinars;J.K. Moore;T.M. Flanagan;N. Ouart;A. Dasgupta;J. Giuliani;A.L. Velikovich;J.P. Apruzese;J.P. Chittenden;N. Niasse;B. Appelbe
The effect of adding a center jet to Argon gas puff implosions at the Z facility
A.J. Harvey-Thompson;B. Jones;C.A. Jennings;D.J. Ampleford;D.C. Lamppa;S.B. Hansen;C.A. Coverdale;M.R. Gomez;G.A. Rochau;D. Johnson;M.C. Jones;N.W. Moore;T. Flanagan;J. Reneker;M. Jobe;L. Lucero;M.E. Cuneo;J.W. Thornhill;J.L. Giuliani;A. Dasgupta
2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS)
Year: 2014 | Conference Paper |
Cited by: Papers (2)
Argon gas puff implosions have been found to be an extremely efficient source of K-shell x-rays (3-4 keV) on the Z pulsed power facility at Sandia National Labs. producing over 300 kJ of K-shell emission in double-shell experiments. Experiments at Double Eagle [1] and Saturn [2] have previously found that adding a central jet of mass to their double-shell gas puff configurations increased the yiel...Show More
The effect of adding a center jet to Argon gas puff implosions at the Z facility
A.J. Harvey-Thompson;B. Jones;C.A. Jennings;D.J. Ampleford;D.C. Lamppa;S.B. Hansen;C.A. Coverdale;M.R. Gomez;G.A. Rochau;D. Johnson;M.C. Jones;N.W. Moore;T. Flanagan;J. Reneker;M. Jobe;L. Lucero;M.E. Cuneo;J.W. Thornhill;J.L. Giuliani;A. Dasgupta
A Renewed Capability for Gas Puff Science on Sandia's Z Machine
Brent Jones;Christopher A. Jennings;Derek C. Lamppa;Stephanie B. Hansen;Adam J. Harvey-Thompson;David J. Ampleford;Michael E. Cuneo;Thomas Strizic;Drew Johnson;Michael C. Jones;Nathan W. Moore;Timothy M. Flanagan;John L. McKenney;Eduardo M. Waisman;Christine A. Coverdale;Mahadevan Krishnan;Philip L. Coleman;Kristi Wilson Elliott;Robert E. Madden;John Thompson;Alex Bixler;J. Ward Thornhill;John L. Giuliani;Young K. Chong;Alexander L. Velikovich;Arati Dasgupta;John P. Apruzese
A comprehensive gas puff capability is being developed on the Z pulsed power generator. We describe the methodology employed for developing a gas puff load on Z, which combines characterization and modeling of the neutral gas mass flow from a supersonic nozzle, numerical modeling of the implosion of this mass profile, and experimental evaluation of these magnetic implosions on Z. We are beginning ...Show More
A Renewed Capability for Gas Puff Science on Sandia's Z Machine
Brent Jones;Christopher A. Jennings;Derek C. Lamppa;Stephanie B. Hansen;Adam J. Harvey-Thompson;David J. Ampleford;Michael E. Cuneo;Thomas Strizic;Drew Johnson;Michael C. Jones;Nathan W. Moore;Timothy M. Flanagan;John L. McKenney;Eduardo M. Waisman;Christine A. Coverdale;Mahadevan Krishnan;Philip L. Coleman;Kristi Wilson Elliott;Robert E. Madden;John Thompson;Alex Bixler;J. Ward Thornhill;John L. Giuliani;Young K. Chong;Alexander L. Velikovich;Arati Dasgupta;John P. Apruzese
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