Zobrazeno 1 - 10
of 97
pro vyhledávání: '"D. R. Welch"'
Publikováno v:
Physical Review Accelerators and Beams, Vol 26, Iss 4, p 040401 (2023)
Recent studies of power flow and particle transport in multi-MA pulsed-power accelerators demonstrate that electrode plasmas may reduce accelerator efficiency by shunting current upstream from the load [Bennett et al., Phys. Rev. Accel. Beams 24, 060
Externí odkaz:
https://doaj.org/article/53035d3989854049808f5f9de83f27fc
Publikováno v:
Physical Review Accelerators and Beams, Vol 26, Iss 1, p 014602 (2023)
In linear induction accelerators, high-brightness electron beams are accelerated by voltages applied at gaps at discrete locations along the accelerator. At high currents, the beam itself induces wakefields in the accelerating gaps which can then fee
Externí odkaz:
https://doaj.org/article/c6bb428c5b594c80a481d1908d210545
Publikováno v:
Physical Review Accelerators and Beams, Vol 24, Iss 12, p 120401 (2021)
The characterization of a high current, relativistic electron beam, designated the Super Pinch electron beam, has been performed using compact pulsed-power accelerators of various architectures with a novel diode geometry. The Thunderbird accelerator
Externí odkaz:
https://doaj.org/article/eddd85f1777745c6aec76d2c22d6ce1d
Publikováno v:
Physical Review Accelerators and Beams, Vol 24, Iss 6, p 060401 (2021)
Kinetic simulations of Sandia National Laboratories’ Z machine are conducted to understand particle transport in the highly magnetized environment of a multi-MA accelerator. Joule heating leads to the rapid formation of electrode surface plasmas. T
Externí odkaz:
https://doaj.org/article/37e74334d7e946c495e90568d2d4a609
Publikováno v:
Physical Review Accelerators and Beams, Vol 23, Iss 11, p 110401 (2020)
Hybrid-implicit particle-in-cell (PIC) algorithms permit the simulation of complex problems involving both kinetic and fluid plasma regimes over large spatial and temporal scales. Fluid electrons can be computationally fast where and when fluid assum
Externí odkaz:
https://doaj.org/article/6f32b3d04d7b4ad39ae53c668ccf5767
Autor:
D. V. Rose, E. M. Waisman, M. P. Desjarlais, M. E. Cuneo, B. T. Hutsel, D. R. Welch, N. Bennett, G. R. Laity
Publikováno v:
Physical Review Accelerators and Beams, Vol 23, Iss 8, p 080401 (2020)
Two-dimensional electromagnetic (EM) particle-in-cell (PIC) simulations of a radial magnetically-insulated-transmission-line are presented and compared to the model of E. M. Waisman, M. P. Desjarlais, and M. E. Cuneo [Phys. Rev. Accel. Beams 22, 0304
Externí odkaz:
https://doaj.org/article/c8fa0cc472fc47ab86142be7e528a832
Autor:
N. Bennett, D. R. Welch, C. A. Jennings, E. Yu, M. H. Hess, B. T. Hutsel, G. Laity, J. K. Moore, D. V. Rose, K. Peterson, M. E. Cuneo
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 12, p 120401 (2019)
A challenge for the TW-class accelerators driving Z-pinch experiments, such as Sandia National Laboratories’ Z machine, is to efficiently couple power from multiple storage banks into a single multi-MA transmission line. The physical processes that
Externí odkaz:
https://doaj.org/article/988ad11613a74e8d8e10537e7fb9feb4
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 7, p 070401 (2019)
The dynamics of electrode heating, sheath flow, and contaminant plasma evolution in Sandia National Laboratories’ high-power Z accelerator is studied in a series of 2D relativistic particle-in-cell simulations. These dynamics can lead to the shunti
Externí odkaz:
https://doaj.org/article/d3efd39238114554bc1ff6479c79cf28
Autor:
B. T. Hutsel, P. A. Corcoran, M. E. Cuneo, M. R. Gomez, M. H. Hess, D. D. Hinshelwood, C. A. Jennings, G. R. Laity, D. C. Lamppa, R. D. McBride, J. K. Moore, A. Myers, D. V. Rose, S. A. Slutz, W. A. Stygar, E. M. Waisman, D. R. Welch, B. A. Whitney
Publikováno v:
Physical Review Accelerators and Beams, Vol 21, Iss 3, p 030401 (2018)
We have developed a physics-based transmission-line-circuit model of the Z pulsed-power accelerator. The 33-m-diameter Z machine generates a peak electrical power as high as 85 TW, and delivers as much as 25 MA to a physics load. The circuit model is
Externí odkaz:
https://doaj.org/article/e3c0ca82d47f4338b4e98cdbc7a08f48
Autor:
W. A. Stygar, T. J. Awe, J. E. Bailey, N. L. Bennett, E. W. Breden, E. M. Campbell, R. E. Clark, R. A. Cooper, M. E. Cuneo, J. B. Ennis, D. L. Fehl, T. C. Genoni, M. R. Gomez, G. W. Greiser, F. R. Gruner, M. C. Herrmann, B. T. Hutsel, C. A. Jennings, D. O. Jobe, B. M. Jones, M. C. Jones, P. A. Jones, P. F. Knapp, J. S. Lash, K. R. LeChien, J. J. Leckbee, R. J. Leeper, S. A. Lewis, F. W. Long, D. J. Lucero, E. A. Madrid, M. R. Martin, M. K. Matzen, M. G. Mazarakis, R. D. McBride, G. R. McKee, C. L. Miller, J. K. Moore, C. B. Mostrom, T. D. Mulville, K. J. Peterson, J. L. Porter, D. B. Reisman, G. A. Rochau, G. E. Rochau, D. V. Rose, D. C. Rovang, M. E. Savage, M. E. Sceiford, P. F. Schmit, R. F. Schneider, J. Schwarz, A. B. Sefkow, D. B. Sinars, S. A. Slutz, R. B. Spielman, B. S. Stoltzfus, C. Thoma, R. A. Vesey, P. E. Wakeland, D. R. Welch, M. L. Wisher, J. R. Woodworth
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 18, Iss 11, p 110401 (2015)
We have developed conceptual designs of two petawatt-class pulsed-power accelerators: Z 300 and Z 800. The designs are based on an accelerator architecture that is founded on two concepts: single-stage electrical-pulse compression and impedance match
Externí odkaz:
https://doaj.org/article/7a73205ef98b4b91b353618da8ea4981