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Author: Heather Jean Gepford
Publisher:
ISBN:
Category : Cold neutrons
Languages : en
Pages : 200
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Author: Heather Jean Gepford
Publisher:
ISBN:
Category : Cold neutrons
Languages : en
Pages : 200
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Book Description
Author:
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Category :
Languages : en
Pages : 13
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Funds were received for the first year of a three year DOE Nuclear Engineering Research Grant, ''Study of Neutron Focusing at the Texas Cold Neutron Source'' (FGO2-92ER75711). The purpose of this three year study was to develop a neutron focusing system to be used with the Texas Cold Neutron Source (TCNS) to produce an intense beam of neutrons. A prompt gamma activation analysis (PGAA) facility was also to be designed, setup, and tested under the three year project. During the first year of the DOE grant, a new procedure was developed and used to design a focusing converging guide consisting of truncated rectangular cone sections. Detailed calculations were performed using a 3-D Monte Carlo code which we wrote to trace neutrons through the curved guide of the TCNS into the proposed converging guide. Using realistic reflectivities for Ni-Ti supermirrors, we obtained gains of 3 to 5 for the neutron flux averaged over an area of 1 x 1 cm.
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Category :
Languages : en
Pages : 19
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The purpose of this three year study is to develop a neutron focusing system to be used with the Texas Cold Neutron Source (TCNS) to produce an intense beam of neutrons. A prompt gamma activation analysis (PGAA) facility will also be designed, setup, and tested under this DOE grant. During the first year of the DOE grant, a new procedure was developed and used to design a focusing converging guide consisting of truncated rectangular cone sections. Detailed calculations were performed using a 3-D Monte Carlo code which the authors wrote to trace neutrons through the existing curved guide of the TCNS into the proposed converging guide. Using realistic reflectivities for Ni-Ti supermirrors, they obtained gains of 4 to 5 for the neutron flux averaged over an area of 1 x 1 cm. Two graduate students were supported by the first year of the DOE grant. Both have passed the Nuclear Engineering qualifying examination and have been admitted to candidacy for the doctoral degree at The University of Texas at Austin. Their programs of study and dissertation projects have been approved by the appropriate committees.
Author: Martin Luc Niset
Publisher:
ISBN:
Category : Cold neutrons
Languages : en
Pages : 0
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The objective of this thesis is to investigate the use of deuterated organic moderator to produce cold neutron in a reactor based cold neutron source. This is of interest for two reasons: first, for possible enhancement of the operation of the Texas Cold Neutron Source located at the TRIGA reactor of the Nuclear Engineering Teaching Laboratory at the University of Texas; second, for the design of an Ultracold Neutron Source. Two computer codes were used to achieve this objective: NJOY 97 to generate the necessary thermal scattering cross sections; MCNP 4B to simulate the thermalization and transport of the neutrons in the Texas Cold Neutron Source. The generation of thermal neutron cross sections from neutron scattering laws by NJOY was intensively studied for methane (CH4) at 22K. The influence of several key physical and numerical parameters of the input file were investigated. The results obtained gave a good understanding on how to generate the cross section in the best capability of the code NJOY. The calculated scattering cross sections were then tested by MCNP to match an experiment performed by Utsuro (1975). Although the experiment was done with a different organic moderator, 1,3,5-trimethylbenzene (mesithylene), the effects associated to the three methyl radicals should be present in the case of methane. The results of this study gave confidence that the cross sections generated by NJOY match rather well the physical cross section of organic materials. Finally, using thermal cross section for methane and deuterated methane generated by NJOY, the performance of the Texas Cold Neutron Source was simulated using MCNP under a variety of conditions. The incident thermal neutron flux coming from the core of the TRIGA reactor at NETL was simulated. Moderation of these neutrons takes place in the TCNS chamber and cold neutrons entering the neutron guide were tallied. The effect of mixing ordinary and deuterated moderators was determined
Author: Wade H. Shafer
Publisher: Springer Science & Business Media
ISBN: 1461528321
Category : Science
Languages : en
Pages : 350
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Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 36 (thesis year 1991) a total of 11,024 thesis titles from 23 Canadian and 161 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 36 reports theses submitted in 1991, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Author: W. H. Shafer
Publisher: Springer Science & Business Media
ISBN: 9780306444951
Category : Education
Languages : en
Pages : 368
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Book Description
Volume 36 reports (for thesis year 1991) a total of 11,024 thesis titles from 23 Canadian and 161 US universities. The organization of the volume, as in past years, consists of thesis titles arranged by discipline, and by university within each discipline. The titles are contributed by any and all a
Author:
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Category : Nuclear energy
Languages : en
Pages : 1118
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Author: Walter Marshall
Publisher:
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Category : Science
Languages : en
Pages : 634
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Author:
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Category : Aeronautics
Languages : en
Pages : 836
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Author: American Nuclear Society
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Category : Nuclear engineering
Languages : en
Pages : 952
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