Search Results - "Kwan, Thomas J. T."

Two dimensional model for coherent synchrotron radiation by Huang, Chengkun, Kwan, Thomas J. T., Carlsten, Bruce E.

“…Understanding coherent synchrotron radiation (CSR) effects in a bunch compressor requires an accurate model accounting for the realistic beam shape and…”
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A Particle-Mesh Method for the Modeling of Synchrotron Radiation from Electron Beams by Kwan, Thomas J. T., Li, Feiyu, Huang, Chengkun, Garimella, Rao, Carlsten, Bruce

“…Coherent and incoherent effects induced by synchrotron radiation, such as the collective beam microbunching instability and phase space diffusion caused by…”
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Physics of Electron Emission and Beam Dynamics from a Single Diamond Field Emitter by Huang, Chengkun, Kwan, Thomas J. T., Piryatinski, Andrei, Baker, Ryan C., Kim, Dongsung, Pavlenko, Vitaly, Andrews, Heather L., Fleming, Ryan L., Simakov, Evgenya I.

“…Many applications such as compact accelerators and electron microscopy demand high brightness electron beams with small beam size and ultra-low emittance…”
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Scaling laws for ignition at the National Ignition Facility from first principles by Cheng, Baolian, Kwan, Thomas J T, Wang, Yi-Ming, Batha, Steven H

“…We have developed an analytical physics model from fundamental physics principles and used the reduced one-dimensional model to derive a thermonuclear ignition…”
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Simulation of the Cygnus Rod-Pinch Diode Using the Radiographic Chain Model by Kwan, T.J.T., Berninger, M., Snell, C., Wang, T.-S.F., Lin Yin

“…The Cygnus radiographic machine is a relatively compact low-energy (<3 MV) X-ray source with some extremely desirable features for radiographic applications…”
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Theory of electron transport and emission from a semiconductor nanotip by Piryatinski, Andrei, Huang, Chengkun, Kwan, Thomas J. T

“…J. Appl. Phys. 125, 214301 (2019) An effective mass based model accounting for the conduction band quantization in a high aspect ratio semiconductor nanotip is…”
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CoSyR: A novel beam dynamics code for the modeling of synchrotron radiation effects by Huang, C.-K., Li, F.-Y., Rakotoarivelo, H.N., Shen, B., Domine, J., Carlsten, B., Dilts, G., Garimella, R., Kwan, T., Robey, R.

“…The self-consistent nonlinear dynamics of a relativistic charged particle beam interacting with its complete self-fields is a fundamental problem underpinning…”
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Divergence study and emittance measurements for the electron beam emitted from a diamond pyramid by Kim, D., Andrews, H.L., Choi, B.K., Fleming, R.L., Huang, C.-K., Kwan, T.J.T., Lewellen, J.W., Nichols, K., Pavlenko, V., Simakov, E.I.

“…This paper reports the results of a divergence study and emittance measurements for an electron beam emitted from a single diamond pyramid in a sparse diamond…”
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Observations of Multiple Nuclear Reaction Histories and Fuel-Ion Species Dynamics in Shock-Driven Inertial Confinement Fusion Implosions by Sio, Hong, Frenje, J. A., Le, Ari Yitzchak, Atzeni, S., Kwan, Thomas J. T, Gatu Johnson, M., Kagan, Grigory, Stoeckl, C., Li, C. K., Parker, C. E., Forrest, C. J., Glebov, V., Kabadi, N. V., Bose, A., Rinderknecht, H. G., Amendt, P., Casey, D. T., Mancini, R., Taitano, William, Keenan, Brett, Simakov, Andrei N., Chacon, Luis, Regan, S. P., Sangster, T. C., Campbell, E. M., Seguin, F. H., Petrasso, R. D.

“…Fuel-ion species dynamics in DT3He-gas-filled Inertial Confinement Fusion implosion is quantitatively assessed for the first time using simultaneously measured…”
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On the delay time for the onset of radiographic spot size growth by Kwan, T.J.T.

“…We have revisited the physical mechanisms, which lead to a time delay of the onset of the undesirable spot size growth in high-dose X-ray radiography. In our…”
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Kinetic simulation of direct-drive capsule implosions and experiment comparisons by Kwan, Thomas J. T., Le, Ari Y., Schmitt, Mark J., Herrmann, Hans W., Batha, Steve H.

“…We have carried out simulations of direct-drive capsule implosion experiments conducted on Omega laser facility at the Laboratory of Laser energetics of the…”
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Particle-in-cell simulation of dielectric wall accelerators by Kwan, Thomas J. T., Cheungkun Huang, Shchegolkov, Dmitry, Simakov, Evgenya

“…Computer simulations of dielectric wall accelerators using state-of-the-art multi-dimensional particle-in-cell (PIC) codes were carried out. Specifically, the…”
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Field Assisted Photoemission from Nanocrystalline Diamond and Diamond Field Emitter Arrays by Pavlenko, Vitaly, Andrews, Heather L., Aragonez, Robert J., Fleming, Ryan L., Huang, Chengkun, Kim, Dongsung, Kwan, Thomas J. T., Piryatinski, Andrei, Simakov, Evgenya I.

“…Field emission from nanocrystalline diamond and especially from diamond field emitters is known to have an onset at low electric fields of a few MV/m, although…”
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Integrated system simulation in X-ray radiography by Kwan, Thomas J.T., Mathews, Allen R., Christenson, Peggy J., Snell, Charles M.

“…An integrated simulation capability is being developed to examine the fidelity of a dynamic radiographic system. This capability consists of a suite of…”
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Radial electron-beam-breakup transit-time oscillator by Mostrom, MA, Kwan, TJ

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High-efficiency, magnetized, virtual-cathode microwave generator by KWAN, T. J. T

“…Microwave generation by electron beams in virtual-cathode configurations can achieve significant power levels. However, most designs inherently have two…”
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Electron-beam-breakup transit-time oscillator by KWAN, T. J. T, MOSTROM, M. A, GODFREY, B. B

“…The electron-beam-breakup transit-time oscillator has been investigated via theoretical analysis and computer simulation as a high-power microwave generator…”
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Microwave generators: Oscillating virtual cathodes and reflexing electrons by Kwan, Thomas J. T., Thode, Lester E.

“…Simulation of the generation of a relativistic electron beam in a foil diode configuration and of the subsequent intense microwave generation resulting from…”
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Two-dimensional theory and simulation of free electron lasers by Kwan, Thomas J. T., Gary, John R.

“…Two-dimensional homogeneous theory of free-electron lasers with a wiggler magnetic field of constant wavelength is formulated. It has been found from the…”
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Plasma suppression and spot size stabilization in single and multiple pulse flash X-ray radiography by Kwan, T.J.T., Snell, C.M.

“…Summary form only given. Next generation X-ray radiography machines must use high electron beam current to provide the necessary dose and very small spot size…”
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