Zobrazeno 1 - 10
of 23
pro vyhledávání: '"James F. O'Hara"'
Autor:
Evgenya I. Simakov, Sergey S. Kurennoy, James F. O’Hara, Eric R. Olivas, Dmitry Yu. Shchegolkov
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 17, Iss 2, p 022001 (2014)
We present a design of a superconducting rf photonic band gap (SRF PBG) accelerator cell with specially shaped rods in order to reduce peak surface magnetic fields and improve the effectiveness of the PBG structure for suppression of higher order mod
Externí odkaz:
https://doaj.org/article/971314bd77b54afaa99dcc239879931e
Autor:
Robert J. Macek, Andrew A. Browman, John E. Ledford, Michael J. Borden, James F. O’Hara, Rodney C. McCrady, Lawrence J. Rybarcyk, Thomas Spickermann, Thomas J. Zaugg, Mauro T. F. Pivi
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 11, Iss 1, p 010101 (2008)
Recent beam physics studies on the two-stream e-p instability at the LANL proton storage ring (PSR) have focused on the role of the electron cloud generated in quadrupole magnets where primary electrons, which seed beam-induced multipacting, are expe
Externí odkaz:
https://doaj.org/article/93a0254ec64f4aea9e20036ae537682b
Autor:
James F. O'Hara, Mario Pacheco, Henry Gaus, J. A. Bradley, Brandon Roller, Jacob B Sandoval, Lee Merrill, M.J. Borden, W. Roybal, Yuri Batygin, Walter Barkley, J.B. Schillig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d351a300e3703eecbf47075886a7b167
https://doi.org/10.2172/1602723
https://doi.org/10.2172/1602723
Autor:
M. Pieck, J.F. Snyder, Pilar Marroquin, D. E. Norman, E.A. Espinoza, Lawrence Rybarcyk, Catherine Chapman, C. Vermeulen, S. A. Baily, Eric Olivas, J.O. Hill, Heath Watkins, E. Swensen, Francois M. Nortier, R.A. Valicenti, Kevin D. John, Rodney C. McCrady, J.A. Faucett, A.R. Patten, Keith Albert Woloshun, James F. O'Hara, Eva R. Birnbaum, E. M. O’Brien
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 956:163316
The Isotope Production Facility (IPF) at Los Alamos National Laboratory (LANL) is used to produce an array of isotopes for medical, global security, and research applications with an intense beam of protons supplied by the linear accelerator at the L
Autor:
James F. O'Hara, Rodney C. McCrady, Sergey S. Kurennoy, C.M. Fortgang, Y.K.Batygin, Ilija Draganic, Robert W. Garnett, Lawrence Rybarcyk
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 753:1-8
The present LANSCE injector utilizes two 750-keV Cockcroft–Walton (CW) based injectors for simultaneous injection of H+ and H− beams into 800-MeV accelerator. To reduce long-term operational risks, the new project to replace the existing H+ CW in
Autor:
P. L. Walstrom, Lawrence Rybarcyk, D. Barlow, Frank L. Krawczyk, Daniel Rees, Tsuyoshi Tajima, Fred E. Shelley, James F. O'Hara, Mark S. Gulley
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a47cad8118bef8d46f8daebe6e68424
https://doi.org/10.2172/1090644
https://doi.org/10.2172/1090644
Autor:
Michael A. Madrid, James F. O'Hara, Terry Grimm, Eric Olivas, Sergey Arsenyev, W.B. Haynes, Walter M. Tuzel, Dmitry Yu. Shchegolkov, C. H. Boulware, Sergey S. Kurennoy, Tsuyoshi Tajima, Evgenya I. Simakov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::166b652985e7b63b0f2fa646b701473c
https://doi.org/10.2172/1054674
https://doi.org/10.2172/1054674
Publikováno v:
Review of Scientific Instruments. 87:02B112
An overview of different approaches to modeling of hot tungsten filament performance in the Los Alamos Neutron Science Center (LANSCE) H(-) surface converter ion source is presented. The most critical components in this negative ion source are two sp
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 15, Iss 9, p 090101 (2012)
We have developed high-efficiency normal-conducting rf accelerating structures by combining $H$-mode resonator cavities and a transverse beam focusing by permanent-magnet quadrupoles (PMQ), for beam velocities in the range of a few percent of the spe
Autor:
James F. O'Hara, T. Spickermann, A. Browman, John E. Ledford, M.J. Borden, Rodney C. McCrady, M.T.F. Pivi, Robert J. Macek, Lawrence Rybarcyk, T.J. Zaugg
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 11, Iss 1, p 010101 (2008)
Recent beam physics studies on the two-stream e-p instability at the LANL proton storage ring (PSR) have focused on the role of the electron cloud generated in quadrupole magnets where primary electrons, which seed beam-induced multipacting, are expe