Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Lawrence Rybarcyk"'
Publikováno v:
The Review of scientific instruments. 92(11)
Sources of negative ions such as H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::987029bee3c0eab4db4eb80ecca12114
https://pubmed.ncbi.nlm.nih.gov/34852552
https://pubmed.ncbi.nlm.nih.gov/34852552
Publikováno v:
Review of Scientific Instruments. 92:113305
Sources of negative ions such as H− are essential elements of proton accelerators and tokamaks. They have limited lifetime. The replacement of an ion source is a costly process causing delays in the operation of the entire machine. The hot tungsten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b19f00b77f887f96639a84b157cd4900
https://doi.org/10.1063/5.0056123
https://doi.org/10.1063/5.0056123
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b981fc286dcaae3d01843e964480afea
https://doi.org/10.1016/j.nima.2019.163316
https://doi.org/10.1016/j.nima.2019.163316
Publikováno v:
AIP Conference Proceedings.
We are presenting the simulation results of the hot tungsten filament behavior in a Freeman ions source installed in the LANL electro-magnetic isotope separator (EMIS). The Freeman source enables us to ionize and extract high intensity single-charge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae271aae23e41f1d190422a8f1500735
https://doi.org/10.1063/1.5053266
https://doi.org/10.1063/1.5053266
Autor:
Ilija Draganic, Lawrence Rybarcyk
Publikováno v:
AIP Conference Proceedings.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b7c9b49a7b70261f8765601ada4d050
https://doi.org/10.1063/1.5053308
https://doi.org/10.1063/1.5053308
Publikováno v:
Physics Procedia. 66:111-116
Interrogation of special nuclear materials can benefit from mobile sources providing significant fluxes of neutrons (108/s at 2.5 MeV, 1010/s at 14.1 MeV) and of photons (>1012/s at 1-3 MeV). We propose a source that satisfies these requirements simu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e356a617c9b7fe705f59503e19b61a94
https://doi.org/10.1016/j.phpro.2015.05.016
https://doi.org/10.1016/j.phpro.2015.05.016
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::113612da25ee09e0aa3332ef8b664fe6
https://doi.org/10.1016/j.nima.2014.03.041
https://doi.org/10.1016/j.nima.2014.03.041
Autor:
X. Pang, Lawrence Rybarcyk
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 741:124-129
Particle swarm optimization (PSO) and genetic algorithm (GA) are both nature-inspired population based optimization methods. Compared to GA, whose long history can trace back to 1975, PSO is a relatively new heuristic search method first proposed in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32b0eaf40698af2c4bea489aa1b69014
https://doi.org/10.1016/j.nima.2013.12.042
https://doi.org/10.1016/j.nima.2013.12.042
Design and fabrication of a duoplasmatron extraction geometry and LEBT for the LANSCE H⁺ RFQ project
Autor:
Robert W. Garnett, Lawrence Rybarcyk, Rodney C. McCrady, C.M. Fortgang, Y.K.Batygin, Ilija Draganic
Publikováno v:
The Review of scientific instruments. 87(2)
The 750-keV H(+) Cockcroft-Walton at LANSCE will be replaced with a recently fabricated 4-rod Radio Frequency Quadrupole (RFQ) with injection energy of 35 keV. The existing duoplasmatron source extraction optics need to be modified to produce up to 3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a79a15e22a1e169ad0661428b3dc8d49
https://pubmed.ncbi.nlm.nih.gov/26932079
https://pubmed.ncbi.nlm.nih.gov/26932079