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James Rosenzweig - One of the best experts on this subject based on the ideXlab platform.

  • Tapering of Plasma Density ramp profiles for adiabatic lens experiments
    Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment, 2018
    Co-Authors: F. Filippi, M. P. Anania, A. Biagioni, E. Brentegani, E. Chiadroni, Alessandro Cianchi, A. Deng, Massimo Ferrario, Riccardo Pompili, James Rosenzweig
    Abstract:

    Abstract One of the key elements of the Plasma wakefield blowout regime is the strong, linear focusing provided by the ion Density. One advantage of this focusing is its extraordinary strength whose gradient is proportional to the local background Plasma Density, that is particularly important for adiabatic focusing schemes in future compact linear colliders. Local Plasma Density variations can be obtained in gas-filled capillaries by varying monotonically the diameter of the capillary. Here we present the ongoing study of the Plasma Density profile obtained for different tapering angles of the capillary shape and we discuss their use for the adiabatic Plasma lens experiment proposed at SPARC_LAB.

  • Plasma Density transition trapping as a possible high-brightness electron beam source
    Physical Review Special Topics-accelerators and Beams, 2004
    Co-Authors: M.c. Thompson, James Rosenzweig
    Abstract:

    Plasma Density transition trapping is a recently proposed self-injection scheme for Plasma wakefield accelerators. This technique uses a sharp downward Plasma Density transition to trap and accelerate background Plasma electrons in a Plasma wakefield. This paper examines the quality of electron beams captured using this scheme in terms of emittance, energy spread, and brightness. Two-dimensional particle-in-cell simulations show that these parameters can be optimized by manipulating the Plasma Density profile. We also develop, and support with simulations, a set of scaling laws that predicts how the brightness of transition trapping beams scales with the Plasma Density of the system. These scaling laws indicate that transition trapping can produce beams with brightness ≥5×10^{14}   A/(mrad)^{2}. A proof-of-principle transition trapping experiment is planned for the near future. The proposed experiment is described in detail

  • Plasma Density Transition Trapping as a Possible High‐Brightness Electron Beam Source
    AIP Conference Proceedings, 2002
    Co-Authors: M.c. Thompson, James Rosenzweig
    Abstract:

    Plasma Density transition trapping is a recently purposed self‐injection scheme for Plasma wake‐field accelerators. This technique uses a sharp downward Plasma Density transition to trap and accelerate background Plasma electron in a Plasma wake‐field. This paper examines the quality of electron beams captured using this scheme in terms of emittance, energy spread, and brightness. Two‐dimensional Particle‐In‐Cell (PIC) simulations show that these parameters can be optimized by manipulating the Plasma Density profile. We also develop, and support with simulations, a set of scaling laws that predict how the brightness of transition trapping beams scales with the Plasma Density of the system. These scaling laws indicate that transition trapping can produce beams with brightness ⩾ 5×1014Amp/(m‐rad)2. A proof‐of‐principle transition trapping experiment is planned for the UCLA Neptune Laboratory in the near future. The proposed experiment and its status are described in detail.

M.c. Thompson - One of the best experts on this subject based on the ideXlab platform.

  • Plasma Density transition trapping and acceleration of Plasma electrons in a Plasma wakefield
    The 31st IEEE International Conference on Plasma Science 2004. ICOPS 2004. IEEE Conference Record - Abstracts., 2004
    Co-Authors: M.c. Thompson, J.b. Rosenzweig, G. Travish, N. Barov, H. Edwards, P. Piot, J. Santucci
    Abstract:

    Summary form only given. Plasma Density transition trapping is a proposed self-injection scheme for Plasma wakefield accelerators. This technique uses a sharp downward Plasma Density transition to trap and accelerate background Plasma electrons in a Plasma wakefield. A proof-of-principle experiment designed to demonstrate this type of injection is underway at the Fermilab NICADD Photoinjector Laboratory. The goal of experiment is to capture a /spl sim/100 pC beam with /spl sim/4% rms energy spread out of a 2/spl times/10/sup 13/ cm/sup -3/ peak Density Plasma using a 14 MeV drive beam of charge 6-12 nC. We report on initial particle trapping results.

  • Plasma Density transition trapping as a possible high-brightness electron beam source
    Physical Review Special Topics-accelerators and Beams, 2004
    Co-Authors: M.c. Thompson, James Rosenzweig
    Abstract:

    Plasma Density transition trapping is a recently proposed self-injection scheme for Plasma wakefield accelerators. This technique uses a sharp downward Plasma Density transition to trap and accelerate background Plasma electrons in a Plasma wakefield. This paper examines the quality of electron beams captured using this scheme in terms of emittance, energy spread, and brightness. Two-dimensional particle-in-cell simulations show that these parameters can be optimized by manipulating the Plasma Density profile. We also develop, and support with simulations, a set of scaling laws that predicts how the brightness of transition trapping beams scales with the Plasma Density of the system. These scaling laws indicate that transition trapping can produce beams with brightness ≥5×10^{14}   A/(mrad)^{2}. A proof-of-principle transition trapping experiment is planned for the near future. The proposed experiment is described in detail

  • The UCLA/NICADD Plasma Density transition trapping experiment
    Proceedings of the 2003 Particle Accelerator Conference, 2003
    Co-Authors: M.c. Thompson, W. Lu, W. Mori, J.b. Rosenzweig, G. Travish, N. Barov
    Abstract:

    Plasma Density transition trapping is a recently purposed self-injection scheme for Plasma wake-field accelerators. This technique uses a sharp downward Plasma Density transition to trap and accelerate background Plasma electrons in a Plasma wake-field. Two and three dimensional Particle-In-Cell (PIC) simulations show that electron beams of substantial charge can be captured using this technique, and that the beam parameters such as emittance, energy spread, and brightness can be optimized by manipulating the Plasma Density profile. These simulations also predict that transition trapping can produce beams with brightness > 5 /spl times/ 10/sup 14/ Amp/(m-rad)/sup 2/ when scaled to high Plasma Density regimes. A proof-of-principle Plasma Density transition trapping experiment is planned for the near future. This experiment is a collaboration between UCLA and Northern Illinois University (MCADD). The goal of the experiment is to capture a /spl sim/ 100 pC, 1.2 MeV beam with /spl sim/ 4% rms energy spread out of a 2 /spl times/ 10/sup 1/3 cm/sup -3/ peak Density Plasma using a /spl sim/ 6 nC, 14 MeV drive beam. Status and progress on the experiment are reported.

  • Plasma Density Transition Trapping as a Possible High‐Brightness Electron Beam Source
    AIP Conference Proceedings, 2002
    Co-Authors: M.c. Thompson, James Rosenzweig
    Abstract:

    Plasma Density transition trapping is a recently purposed self‐injection scheme for Plasma wake‐field accelerators. This technique uses a sharp downward Plasma Density transition to trap and accelerate background Plasma electron in a Plasma wake‐field. This paper examines the quality of electron beams captured using this scheme in terms of emittance, energy spread, and brightness. Two‐dimensional Particle‐In‐Cell (PIC) simulations show that these parameters can be optimized by manipulating the Plasma Density profile. We also develop, and support with simulations, a set of scaling laws that predict how the brightness of transition trapping beams scales with the Plasma Density of the system. These scaling laws indicate that transition trapping can produce beams with brightness ⩾ 5×1014Amp/(m‐rad)2. A proof‐of‐principle transition trapping experiment is planned for the UCLA Neptune Laboratory in the near future. The proposed experiment and its status are described in detail.

See Leang Chin - One of the best experts on this subject based on the ideXlab platform.

B. V. Vasiliev - One of the best experts on this subject based on the ideXlab platform.

  • The temperature dependence of an equilibrium Plasma Density
    2020
    Co-Authors: B. V. Vasiliev
    Abstract:

    Temperature dependence of an electron-nuclear Plasma equilibrium Density is considered basing on known approaches, which are given in Statistical Physics, part one, by Landau and Lifshits and part two, by Lifshits and Pitaevskii. It is shown that at a very high temperature, which is characteristic for a star interior, the equilibrium Plasma Density is almost constant and equals approximately 10 2 5 particles per cm 3 . At a relatively low temperature, which is characteristic for a star surface, the equilibrium Plasma Density is several orders lower and depends on temperature as T 3 / 2 .

  • The temperature dependence of equilibrium Plasma Density
    arXiv: Astrophysics, 2002
    Co-Authors: B. V. Vasiliev
    Abstract:

    Temperature dependence of an electron-nuclear Plasma equilibrium Density is considered basing on known approaches, which are given in (1)(2). It is shown that at a very high temperature, which is characteristic for a star interior, the equilibrium Plasma Density is almost constant and equals approximately to $10^{25}$ particles per $cm^3$. At a relatively low temperature, which is characteristic for star surface, the equilibrium Plasma Density is in several orders lower and depends on temperature as $T^{3/2}$.

T. A. Shelkovenko - One of the best experts on this subject based on the ideXlab platform.

  • Plasma Density measurements within Tungsten wire-array z-pinches on the cobra accelerator
    2008 IEEE 35th International Conference on Plasma Science, 2008
    Co-Authors: J. D. Douglass, D. A. Hammer, R. D. Mcbride, K. S. Bell, P. F. Knapp, J. B. Greenly, S. A. Pikuz, T. A. Shelkovenko
    Abstract:

    The COBRA pulsed-power generator, with a nominal peak current of 1.1 MA and a minimum zero-to-peak rise-time of 95 ns, is being used to study the early phases of wire-array Z-pinch development with a variety of diagnostics. Here we present the results of applying point-projection X-ray radiography using up to five X pinches in the return current circuit to make accurate, high-resolution measurements of the Plasma Density distributions in tungsten (W) wire-array Z-pinch implosions. Plasma Density measurements are calibrated by comparing X-ray transmission recorded on photographic films to transmission through W steps with known thicknesses. Plasma Density distributions as a function of time with sub-ns time resolution and few-mum spatial resolution are presented for the coronal Plasma close to each wire (1018-1020/cm3), ablation streams moving towards the axis (