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5 results on '"CARY LO"'

1. 4D transverse phase space tomography of an operational hydrogen ion beam via noninvasive 2D measurements using laser wires

Author

Jonathan C. Wong, Andrei Shishlo, Alexander Aleksandrov, Yun Liu, and Cary Long

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Utilizing noninvasive 2D scans with laser wires, we tomographically reconstructed the 4D transverse phase space distribution of a 1-GeV hydrogen ion (i.e., H^{-}) beam during operation. The 4D tomography is based on two new advances. First, we extended the formulation of maximum entropy phase space tomography to take 2D projections as input and derived theoretical results relevant to our application. Second, we introduced the method of “perpendicular scans” to obtain cross-plane information from a laser wire emittance scanner. Perpendicular scans are two unconventional 2D measurements performed with perpendicular front and back wires. In contrast, only parallel front and back wires (i.e., “parallel scans”) are utilized in ordinary measurements of the horizontal and vertical 2D phase space distributions. When we applied the technique to the laser emittance station in the high-energy beam transport of the Spallation Neutron Source, experimental results showed that perpendicular scans can provide significant new information to the reconstructed 4D phase space distribution.

Published
2022
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2. Synthesis of iron-nitrogen compounds by r.f. sputtering: Mössbauer studies

Author

Russell Messier, Cary Lo, S. V. Krishnaswamy, K. R. P. M. Rao, and L.N. Mulay

Subjects
Materials science, Mössbauer effect, Mechanical Engineering, Inorganic chemistry, Analytical chemistry, chemistry.chemical_element, Fischer–Tropsch process, Nitride, Condensed Matter Physics, Chemical reaction, Nitrogen, chemistry, Mechanics of Materials, Sputtering, X-ray crystallography, Mössbauer spectroscopy, General Materials Science
Abstract

The preparation of a range of rf-sputtered Fe-N compounds by control of the sputtering parameters is reported. Contrary to earlier reports, it is shown that single phase Fe/sub 4/N can be synthesized by the exclusive use of N/sub 2/ gas. However, adding H/sub 2/ to the sputtering gas improves the ease of formation and the range of control. The x-ray diffraction and Moessbauer data are presented. 9 references, 3 figures, 1 table.

Published
1980
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4. High efficiency laser-assisted H^{-} charge exchange for microsecond duration beams

Author

Sarah Cousineau, Abdurahim Rakhman, Martin Kay, Alexander Aleksandrov, Viatcheslav Danilov, Timofey Gorlov, Yun Liu, Cary Long, Alexander Menshov, Michael Plum, Andrei Shishlo, Andrew Webster, and David Johnson

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Laser-assisted stripping is a novel approach to H^{-} charge exchange that overcomes long-standing limitations associated with the traditional, foil-based method of producing high-intensity, time-structured beams of protons. This paper reports on the first successful demonstration of the laser stripping technique for microsecond duration beams. The experiment represents a factor of 1000 increase in the stripped pulse duration compared with the previous proof-of-principle demonstration. The central theme of the experiment is the implementation of methods to reduce the required average laser power such that high efficiency stripping can be accomplished for microsecond duration beams using conventional laser technology. The experiment was performed on the Spallation Neutron Source 1 GeV H^{-} beam using a 1 MW peak power UV laser and resulted in ∼95% stripping efficiency.

Published
2017
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5. Mössbauer Spectroscopy and Its Chemical Applications

Author

JOHN G. STEVENS, GOPAL K. SHENOY, MARY L. GOOD, MICHAEL GRODZICKI, SIEGFRIED LAUER, ALFRED X. TRAUTWEIN, ANNABELLA VERA, T. K. SHAM, R. E. WATSON, M. L. PERLMAN, M. J. TRICKER, G. LONGWORTH, R. ATKINSON, G. K. SHENOY, D. NIARCHOS, P. J. VICCARO, B. D. DUNLAP, T. SHIGEMATSU, H.-D. PFANNES, W. KEUNE, PEDRO A. MONTANO, D. L. WILLIAMSON, T. W. GUETTINGER, D. W. DICKERHOOF, J. D. CASHION, B. MAGUIRE, L. T. KISS, R. E. KARL, J. J. ZUCKERMAN, LAWRENCE H. BOWEN, STERLING B. WEED, G. P. HUFFMAN, F. E. HUGGINS, ECKARD MÜNCK, WILLIAM T. VETTERLING, D. G. KARRAKER, R. V. PARISH, OWEN PARRY, THOMAS BIRCHALL, RONALD D. MYERS, U. LADEWIG, B. PERSCHEID, K. FRANK, G. KAINDL, P. GÜTLICH, GARY J. LONG, LAURIE W. BECKER, BENNETT B. HUTCHINSON, G. R. HOY, M. R. CORSON, G. WORTMANN, M. LÖHNERT, M. EIBSCHÜTZ, R. L. COHEN, M. L. GOOD, M. D. PATIL, J. T. DONNER, C. P. MADHUSUDAHAN, CARY LO, K. R. P. M. RAO, L. N. MULAY, V. U. S. RAO, R. T. OBERMYER, R. J. GORMLEY, FRANK J. BERRY, DING YING-RU, YEN QI-JIE, HSIA YUAN-FU, JIN YONG-SHU, QIU JIN-HENG, JOHN G. STEVENS, GOPAL K. SHENOY, MARY L. GOOD, MICHAEL GRODZICKI, SIEGFRIED LAUER, ALFRED X. TRAUTWEIN, ANNABELLA VERA, T. K. SHAM, R. E. WATSON, M. L. PERLMAN, M. J. TRICKER, G. LONGWORTH, R. ATKINSON, G. K. SHENOY, D. NIARCHOS, P. J. VICCARO, B. D. DUNLAP, T. SHIGEMATSU, H.-D. PFANNES, W. KEUNE, PEDRO A. MONTANO, D. L. WILLIAMSON, T. W. GUETTINGER, D. W. DICKERHOOF, J. D. CASHION, B. MAGUIRE, L. T. KISS, R. E. KARL, J. J. ZUCKERMAN, LAWRENCE H. BOWEN, STERLING B. WEED, G. P. HUFFMAN, F. E. HUGGINS, ECKARD MÜNCK, WILLIAM T. VETTERLING, D. G. KARRAKER, R. V. PARISH, OWEN PARRY, THOMAS BIRCHALL, RONALD D. MYERS, U. LADEWIG, B. PERSCHEID, K. FRANK, G. KAINDL, P. GÜTLICH, GARY J. LONG, LAURIE W. BECKER, BENNETT B. HUTCHINSON, G. R. HOY, M. R. CORSON, G. WORTMANN, M. LÖHNERT, M. EIBSCHÜTZ, R. L. COHEN, M. L. GOOD, M. D. PATIL, J. T. DONNER, C. P. MADHUSUDAHAN, CARY LO, K. R. P. M. RAO, L. N. MULAY, V. U. S. RAO, R. T. OBERMYER, R. J. GORMLEY, FRANK J. BERRY, DING YING-RU, YEN QI-JIE, HSIA YUAN-FU, JIN YONG-SHU, and QIU JIN-HENG

Subjects
Mo¨ssbauer spectroscopy--Congresses
Published
1981

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