Search Results - "Sheffield, R. L."

Beam-Halo Measurements in High-Current Proton Beams by Allen, C. K., Chan, K. C. D., Colestock, P. L., Crandall, K. R., Garnett, R. W., Gilpatrick, J. D., Lysenko, W., Qiang, J., Schneider, J. D., Schulze, M. E., Sheffield, R. L., Smith, H. V., Wangler, T. P.

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Beam-halo measurements in high-current proton beams by Allen, C K, Chan, K C D, Colestock, P L, Crandall, K R, Garnett, R W, Gilpatrick, J D, Lysenko, W, Qiang, J, Schneider, J D, Schulze, M E, Sheffield, R L, Smith, H V, Wangler, T P

“…We present results from an experimental study of the beam halo in a high-current 6.7-MeV proton beam propagating through a 52-quadrupole periodic-focusing…”
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Experimental results from the Los Alamos FEL photoinjector by Feldman, D.W., Bender, S.C., Carlsten, B.E., Early, J., Feldman, R.B., Johnson, W.J.D., Lumpkin, A.H., O'Shea, P.G., Stein, W.E., Sheffield, R.L., Young, L.M.

“…The authors report some initial measurements of electron beam properties from the new photoinjector installed as the front end on the Los Alamos free-electron…”
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High-brightness injectors for RF-driven free-electron lasers by Fraser, J., Sheffield, R.

“…Free-electron laser (FEL) oscillators require pulse trains of high peak brightness and, in some applications, high average power. Recent developments in the…”
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Ultraviolet free-electron laser driven by a high-brightness 45-MeV electron beam by O'SHEA, P. G, BENDER, S. C, ZAUGG, T. J, BYRD, D. A, EARLY, J. W, FELDMAN, D. W, FORTGANG, C. M, GOLDSTEIN, J. C, NEWNAM, B. E, SHEFFIELD, R. L, WARREN, R. W

“…We report on experimental studies of an ultraviolet (UV) free-electron laser (FEL) oscillator driven by low-energy electrons from a radio-frequency linear…”
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Observation of Self-Amplified Spontaneous-Emission-Induced Electron-Beam Microbunching Using Coherent Transition Radiation by Tremaine, A., Rosenzweig, J. B., Anderson, S., Frigola, P., Hogan, M., Murokh, A., Pellegrini, C., Nguyen, D. C., Sheffield, R. L.

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High-brightness photoemitter injector for electron accelerators by Fraser, J S, Sheffield, R L, Gray, E R, Rodenz, G W

“…A free-electron laser (FEL) oscillator, driven by an rf linac, requires a train of electron bunches delivered to an undulator. The electron-beam brightness…”
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Beam-halo in mismatched proton beams by Wangler, T.P., Allen, C.K., Chan, K.C.D., Colestock, P.L., Crandall, K.R., Garnett, R.W., Gilpatrick, J.D., Lysenko, W., Qiang, J., Schneider, J.D., Schulze, M.E., Sheffield, R.L., Smith, H.V.

“…Progress was made during the past decade towards a better understanding of halo formation caused by beam mismatch in high-intensity beams. To test these ideas…”
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Photocathodes for free electron lasers by Kong, S.H., Kinross-Wright, J., Nguyen, D.C., Sheffield, R.L.

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Optical performance of the Los Alamos free-electron laser by Newnam, B., Warren, R., Sheffield, R., Stein, W., Lynch, M., Fraser, J., Goldstein, J., Sollid, J., Swann, T., Watson, J., Brau, C.

“…During a year of oscillator experiments, the Los Alamos free-electron laser has demonstrated high-power and diffraction-limited output capabilities with a…”
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Self-Amplified Spontaneous Emission Driven by a High-Brightness Electron Beam by Nguyen, D. C., Sheffield, R. L., Fortgang, C. M., Goldstein, J. C., Kinross-Wright, J. M., Ebrahim, N. A.

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An independently controllable multiline laser resonator and its use in multifrequency injection locking by Sheffield, R. L., Nazemi, S., Javan, A.

“…A resonator configuration is described which makes it possible to obtain simultaneous laser oscillation on several preselected transitions without the coupling…”
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Electron-beam diagnostics and results for the Los Alamos free-electron laser by Sheffield, R., Stein, W., Warren, R., Fraser, J., Lumpkin, A.

“…In this paper, we describe the diagnostic devices used to measure various properties of the electron beam used in the Los Alamos free-electron laser…”
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Heating of a dense plasma using an intense, relativistic electron beam by Montgomery, M. D., Parker, J. V., Riepe, K. B., Sheffield, R. L.

“…We report observations of heating of a dense (∼1017 cm−3) plasma using a 3-MeV electron beam with a current density of 5×105 A/cm2. The measured, strong…”
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Performance of cesium telluride photocathodes as an electron source for the Los Alamos Advanced FEL by Kong, S.H., Kinross-Wright, J., Nguyen, D.C., Sheffield, R.L., Weber, M.E.

“…The Los Alamos Advanced FEL was successfully operated with a Cs2Te photocathode driven by a frequency quadrupled Nd:YLF laser as the electron source. Lasing…”
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Fabrication and characterization of cesium telluride photocathodes: A promising electron source for the Los Alamos Advanced FEL by Kong, S.H., Nguyen, D.C., Sheffield, R.L., Sherwood, B.A.

“…The Advanced FEL at Los Alamos embodies a K2CsSb photocathode as an electron source. The photocathode consists of a K2CsSb film deposited on a molybdenum plug…”
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Synchronously injected amplifiers, a novel approach to high-average-power FEL by Nguyen, Dinh C, Fortgang, C.M, Goldstein, J.C, Kinross-Wright, J.M, Sheffield, R.L

“…Two new FEL ideas based on synchronously injected amplifiers are described. Both of these rely on the synchronous injection of the optical signal into a…”
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Conceptual design of a compact Compton backscatter X-ray source tunable from 3 to 33 keV by Nguyen, D.C., Gierman, S.M., Vernon, W., Sheffield, R.L.

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Recent progress of the compact AFEL at Los Alamos by Nguyen, D.C., Gierman, S.M., Goldstein, J.C., Kinross-Wright, J.M., Kong, S.H., Plato, J.G., Russell, S.J., Sheffield, R.L., Sigler, F.E., Sherwood, B.A., Weber, M.E., Ziomek, C.

“…The Advanced Free Electron Laser (AFEL) is a compact, infrared, rf-linac FEL that uses a high-brightness photoinjector and a short-period permanent-magnet…”
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Electron beamline design for the Los Alamos National Laboratory 1 kW FEL by Sheffield, R.L

“…This paper describes the electron beam simulations for a 1 kW average power FEL. The experiment utilizes the existing AFEL accelerator. An expected 6% total…”
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