Search Results - "WELCH, Dale R"

Anode plasma dynamics in the self-magnetic-pinch diode by Bruner, Nichelle, Welch, Dale R., Hahn, Kelly D., Oliver, Bryan V.

“…The self-magnetic-pinch diode is being developed as an intense electron beam source for pulsed-power-driven x-ray radiography. In high-power operation, the…”
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Transition from Beam-Target to Thermonuclear Fusion in High-Current Deuterium Z-Pinch Simulations by Offermann, Dustin T, Welch, Dale R, Rose, Dave V, Thoma, Carsten, Clark, Robert E, Mostrom, Chris B, Schmidt, Andrea E W, Link, Anthony J

“…Fusion yields from dense, Z-pinch plasmas are known to scale with the drive current, which is favorable for many potential applications. Decades of…”
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Power Flow Simulations of the Z Accelerator Using Empire by Sirajuddin, David, Bettencourt, Matthew T., Phillips, Edward G., McGregor, Duncan, Roberds, Nicholas, Bennett, Nichelle, Laity, George R., Rose, David V., Welch, Dale R.

“…The azimuthally periodic Z pulsed power facility at Sandia National Laboratories drives megajoules of electrical energy stored at its outer perimeter through a…”
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Overview of Self-Magnetically Pinched-Diode Investigations on RITS-6 by Hahn, Kelly D, Bruner, Nichelle, Johnston, Mark D, Oliver, Bryan V, Webb, Timothy J, Welch, Dale R, Cordova, Steve R, Crotch, Ian, Gignac, Raymond E, Leckbee, Josh J, Molina, Isidro, Portillo, Salvador, Threadgold, Jim R, Ziska, Derek

“…The electron-beam-driven self-magnetically pinched diode is a candidate for future flash X-ray radiographic sources. As presently fielded on Sandia…”
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Detailed Simulation of the CYGNUS Rod Pinch Radiographic Source by Miller, C L, Welch, D R, Rose, D V, Oliver, B V

“…In this paper, we present the results from particle-in-cell simulations of the nominally 2-MV 40-kA CYGNUS radiographic machine using a standard rod pinch…”
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Shot reproducibility of the self-magnetic-pinch diode at 4.5 MV by Bennett, Nichelle, Crain, M. Dale, Droemer, Darryl W., Gignac, Raymond E., Lare, Greg, Molina, Isidro, Obregon, Robert, Smith, Chase C., Wilkins, Frank L., Welch, Dale R., Cordova, Steve, Gallegos, Manuel L., Johnston, Mark D., Kiefer, Mark L., Leckbee, Joshua J., Mazarakis, Michael G., Nielsen, Dan, Renk, Timothy J., Romero, Tobias, Webb, Timothy J., Ziska, Derek

“…In experiments conducted at Sandia National Laboratories’ RITS-6 accelerator, the self-magnetic-pinch diode exhibits significant shot-to-shot variability…”
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Electron beam pumped krypton fluoride lasers for fusion energy by Sethian, J.D., Smilgys, R.V., Swanekamp, S.B., Weidenheimer, D., Giorgi, D., Welch, D.R., Rose, D.V., Searles, S., Myers, M.C., Giuliani, J.L., Lehmberg, R.H., Kepple, P.C., Obenschain, S.P., Hegeler, F., Friedman, M., Wolford, M.F.

“…High-energy electron beam pumped krypton fluoride (KrF) gas lasers are an attractive choice for inertial fusion energy (IFE). Their short wavelength and…”
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Energy and Current Density Measurements of RITS-6 Large-Area Diode Electron Beam by Webb, Timothy J, Hahn, Kelly D, Johnston, Mark D, Oliver, Bryan V, Welch, Dale R

“…The depth-dose measurements of Radiographic Integrated Test Stand-6 large-area diode electron beam operating at approximately 10-MV peak voltage suggest a 10 ±…”
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Back-streaming ion beam measurements in a self magnetic pinch (SMP) electron diode by Mazarakis, Michael G., Cordova, Steven R., Johnston, Mark D., Kiefer, Mark L., Leckbee, Joshua J., Nielsen, Dan S., Oliver, Bryan V., Renk, Timothy J., Webb, Timothy J., Ziska, Derek, Bennett, Nichelle, Droemer, Darryl W., Cignac, Raymond E., Obregon, Robert J., Smith, Chase C., Wilkins, Frank L., Welch, Dale R., Romero, Tobias M.

“…Summary form only given. A self-magnetic pinch diode (SMP) is presently the electron diode of choice for high energy flash x-ray radiography utilizing pulsed…”
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Collective instabilities and beam-plasma interactions in intense heavy ion beams by Davidson, Ronald C., Kaganovich, Igor, Qin, Hong, Startsev, Edward A., Welch, Dale R., Rose, David V., Uhm, Han S.

“…This paper presents a survey of the present theoretical understanding of collective processes and beam-plasma interactions affecting intense heavy ion beam…”
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Monte Carlo versus bulk conductivity modeling of RF breakdown of helium by Thoma, C., Hughes, T.P., Bruner, N.L., Genoni, T.C., Welch, D.R., Clark, R.E.

“…A Monte Carlo collision model and a bulk conductivity model have been implemented in the finite-difference time-domain code Lsp to allow simulation of…”
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Novel techniques for modeling of laser-plasma interactions in particle-in-cell codes for use in hohlraum simulations by Thoma, Carsten H., Welch, Dale R., Clark, Robert E., Rose, David V

“…In the NIF hohlraum gold walls are heated by laser beams (I ∼ 1015 W/cm2, λ = 1/3 μm pulse lengths ∼ 1 ns), with collisional absorption believed to be the…”
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The ARCTIC Charged Particle Beam Propagation Code by Mostrom, Michael A., Mitrovich, Dushan, Welch, Dale R.

“…The ARCTIC code has been developed to calculate the inductive erosion of, and plasma wakefield generation by, an ultrarelativistic electron beam propagating in…”
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Contribution of the backstreaming ions to the Self-Magnetic pinch (SMP) diode current by Mazarakis, Michael G., Cuneo, Michael E., Fournier, Sean D., Johnston, Mark D., Kiefer, Mark L., Leckbee, Joshua J., Nielsen, Dan S., Oliver, Bryan V., Simpson, Sean, Renk, Timothy J., Webb, Timothy J., Ziska, Derek, Bennett, Nichelle, Droemer, Darryl W., Cignac, Raymond E., Obregon, Robert J., Smith, Chase C., Wilkins, Frank L., Welch, Dale R.

“…Summary form only given. The results presented here were obtained with an SMP diode mounted at the front high voltage end of the RITS accelerator. RITS is a…”
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Current transport and loss mechanisms in the Z accelerator by Bennett, N., Welch, D. R., Jennings, C. A., Yu, E., Hess, M. H., Hutsel, B. T., Laity, G., Moore, J. K., Rose, D. V., Peterson, K., Cuneo, M. E.

“…A challenge for the TW-class accelerators drivingZ-pinch experiments, such as Sandia National Laboratories’Zmachine, is to efficiently couple power from…”
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Survey of collective instabilities and beam–plasma interactions in intense heavy ion beams by Davidson, Ronald C., Dorf, Mikhail A., Kaganovich, Igor D., Qin, Hong, Sefkow, Adam, Startsev, Edward A., Welch, Dale R., Rose, David V., Lund, Steven M.

“…This paper presents a survey of the present theoretical understanding based on advanced analytical and numerical studies of collective processes and…”
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Effects of finite pulse length, magnetic field, and gas ionization on ion beam pulse neutralization by background plasma by Kaganovich, Igor D., Sefkow, Adam B., Startsev, Edward A., Davidson, Ronald C., Welch, Dale R.

“…This paper presents a survey of the present theoretical understanding of plasma neutralization of intense heavy ion beams. Particular emphasis is placed on…”
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Parallel Operation of Multiple Closely Spaced Small Aspect Ratio Rod Pinches by Harper-Slaboszewicz, Victor J., Leckbee, Joshua, Bennett, Nichelle, Madrid, Elizabeth A., Rose, David V., Thoma, Carsten, Welch, Dale R., Lake, Patrick W., McCourt, Andrew L.

“…A series of simulations and experiments to resolve questions about the operation of arrays of closely spaced small aspect ratio rod pinches has been performed…”
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Simulation of cathode plasma expansion in magnetically-insulated transmission lines by Thoma, Carsten H., Genoni, Thomas C., Welch, Dale R.

“…We describe a novel algorithm for the generation of cathode plasma expansion in particle-in-cell codes, and have applied the algorithm to investigate cathode…”
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Integrated simulation of an ion-driven warm dense matter experiment by Welch, Dale R., Rose, David V., Thoma, Carsten, Sefkow, Adam B., Kaganovich, Igor D., Seidl, Peter A., Yu, Simon S., Barnard, John J., Roy, Prabir K.

“…Longitudinal compression factors in excess of 50 of a 300-keV, 20-mA K + ion beam have been demonstrated in the Neutralized Drift Compression Experiment (NDCX)…”
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