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Fundamental studies of fusion plasmas
Work on ICRF interaction with the edge plasma is reported. ICRF generated convective cells have been established as an important mechanism for influencing edge transport and interaction with the H-mode, and for controlling profiles in the tokamak scrape-off-layer. Power dissipation by rf sheaths has been shown to be significant for some misaligned ICRF and IIBW antenna systems. Near-field antenna sheath work has been extended to the far-field case, important for experiments with low single pass absorption. Impurity modeling and Faraday screen design support has been provided for the ICRF community. In the area of core-ICRF physics, the kinetic theory of heating by applied ICRF waves has been extended to retain important geometrical effects relevant to modeling minority heated tokamak plasmas, thereby improving on the physics base that is standard in presently employed codes. Both the quasilinear theory of ion heating, and the plasma response function important in wave codes have been addressed. In separate studies, it has been shown that highly anisotropic minority heated plasmas can give rise to unstable field fluctuations in some situations. A completely separate series of studies have contributed to the understanding of tokamak confinement physics. Additionally, a diffraction formalism has been produced which will be …
Date:
April 27, 1993
Creator:
Aamodt, R. E.; Catto, P. J.; D'Ippolito, D. A.; Myra, J. R. & Russell, D. A.
Object Type:
Report
System:
The UNT Digital Library
Fundamental studies of fusion plasmas. Annual performance report
Work on ICRF interaction with the edge plasma is reported. ICRF generated convective cells have been established as an important mechanism for influencing edge transport and interaction with the H-mode, and for controlling profiles in the tokamak scrape-off-layer. Power dissipation by rf sheaths has been shown to be significant for some misaligned ICRF and IIBW antenna systems. Near-field antenna sheath work has been extended to the far-field case, important for experiments with low single pass absorption. Impurity modeling and Faraday screen design support has been provided for the ICRF community. In the area of core-ICRF physics, the kinetic theory of heating by applied ICRF waves has been extended to retain important geometrical effects relevant to modeling minority heated tokamak plasmas, thereby improving on the physics base that is standard in presently employed codes. Both the quasilinear theory of ion heating, and the plasma response function important in wave codes have been addressed. In separate studies, it has been shown that highly anisotropic minority heated plasmas can give rise to unstable field fluctuations in some situations. A completely separate series of studies have contributed to the understanding of tokamak confinement physics. Additionally, a diffraction formalism has been produced which will be …
Date:
April 27, 1993
Creator:
Aamodt, R. E.; Catto, P. J.; D`Ippolito, D. A.; Myra, J. R. & Russell, D. A.
Object Type:
Report
System:
The UNT Digital Library
The development of precipitated iron catalysts with improved stability; Final report, September 1987--September 1992
Precipitated iron catalysts are expected to be used in next generation slurry reactors for large-scale production of transportation fuels from synthesis gas. These reactors are expected to operate at higher temperatures and lower H{sub 2}:CO ratios relative to the Sasol Arge reactor (Table 1A). The feasibility of using iron catalysts has been demonstrated under relatively mild Arge-type conditions but not under more severe slurry conditions. Possibly, an improvement in catalytic stability will be needed to make iron catalysts suitable for slurry operation. This program was aimed at identifying the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and use of these chemical principles in the design of more stable catalysts. A new precipitated Fe catalyst was developed in this program for slurry reactor operation. The new Fe catalyst is predicted to perform slightly below the performance targets for slurry bubble column operation. Stability targets appear to be achievable. This catalyst did not noticeably deactivate during 1,740 hours on-stream. Compared to the selectivity target, an excess of 2% C{sub 1} + C{sub 2} was formed at 265{degrees}C. Based on the initial catalyst inventory in the autoclave, the catalyst seems to be short of the activity target by …
Date:
December 27, 1993
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Load calculation and system evaluation for electric vehicle climate control
Providing air conditioning for electric vehicles (EVs) represents an important challenge, because vapor compression air conditioners, which are common in gasoline powered vehicles, may consume a substantial part of the total energy stored in the EV battery. This report consists of two major parts. The first part is a cooling and heating load calculation for electric vehicles. The second part is an evaluation of several systems that can be used to provide the desired cooling and heating in EVs. Four cases are studied. Short range and full range EVs are each analyzed twice, first with the regular vehicle equipment, and then with a fan and heat reflecting windows, to reduce hot soak. Recent legislation has allowed the use of combustion heating whenever the ambient temperature drops below 5{degrees}C. This has simplified the problem of heating, and made cooling the most important problem. Therefore, systems described in this project are designed for cooling, and their applicability to heating at temperatures above 5{degrees}C is described. If the air conditioner systems cannot be used to cover the whole heating load at 5{degrees}C, then the vehicle requires a complementary heating system (most likely a heat recovery system or electric resistance heating). Air conditioners are …
Date:
October 27, 1993
Creator:
Aceves-Saborio, S. & Comfort, W. J., III
Object Type:
Report
System:
The UNT Digital Library
The regulatory compliance plan for the Minimum Additive Waste Stabilization (MAWS) Program
The Fernald Environmental Management Project (FEMP) has initiated the Minimum Additive Waste Stabilization (MAWS) Program to demonstrate and evaluate integrated treatment of the FEMP site`s Operable Unit 1 contaminated soils and sludges. The demonstration will require on-site operation of an integrated treatment system consisting of soil washing, water treatment by ion exchange, and vitrification of all contaminated solid wastes at a rate of 300 kg per day. Compliance with all relevant environmental regulations is a major priority of this program. Relevant regulatory requirements come under the jurisdiction of the US Environmental Protection Agency (US EPA), the Ohio Environmental Protection Agency (Ohio EPA), and the Department of Energy (DOE). The plethora of potentially applicable regulations were reviewed and an efficient regulatory compliance strategy developed. This strategy was documented in the MAWS Regulatory Compliance Plan which was presented to the regulatory agencies as a reasonable working plan. The FEMP has found the development of a comprehensive, organized regulatory plan to be critical to the successful implementation of integrated demonstration projects such as the MAWS Program. This paper discusses the approaches used in the MAWS Regulatory Compliance Plan and highlights which could prove useful for others that want to approach the DOE and/or …
Date:
January 27, 1993
Creator:
Akgunduz, N. K.; Gimpel, R. F. & Finger, S. M.
Object Type:
Article
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 89, No. 46, Ed. 1 Wednesday, October 27, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
October 27, 1993
Creator:
Aldridge, Leon & Priddy, Travis
Object Type:
Newspaper
System:
The Portal to Texas History
Report on high energy neutron dosimetry workshop
The workshop was called to assess the performance of neutron dosimetry per the responses from ten DOE accelerator facilities to an Office of Energy Research questionnaire regarding implementation of a personnel dosimetry requirement in DRAFT DOE 5480.ACC, ``Safety of Accelerator Facilities``. The goals of the workshop were to assess the state of dosimetry at high energy accelerators and if such dosimetry requires improvement, to reach consensus on how to proceed with such improvements. There were 22 attendees, from DOE Programs and contract facilities, DOE, Office of Energy Research (ER), Office of Environmental Safety and Health (EH), Office of Fusion Energy, and the DOE high energy accelerator facilities. A list of attendees and the meeting agenda are attached. Copies of the presentations are also attached.
Date:
January 27, 1993
Creator:
Alvar, K. R. & Gavron, A.
Object Type:
Article
System:
The UNT Digital Library
Report on high energy neutron dosimetry workshop
The workshop was called to assess the performance of neutron dosimetry per the responses from ten DOE accelerator facilities to an Office of Energy Research questionnaire regarding implementation of a personnel dosimetry requirement in DRAFT DOE 5480.ACC, Safety of Accelerator Facilities''. The goals of the workshop were to assess the state of dosimetry at high energy accelerators and if such dosimetry requires improvement, to reach consensus on how to proceed with such improvements. There were 22 attendees, from DOE Programs and contract facilities, DOE, Office of Energy Research (ER), Office of Environmental Safety and Health (EH), Office of Fusion Energy, and the DOE high energy accelerator facilities. A list of attendees and the meeting agenda are attached. Copies of the presentations are also attached.
Date:
January 27, 1993
Creator:
Alvar, K.R. & Gavron, A.
Object Type:
Article
System:
The UNT Digital Library
[Michigan Technological University Pre-Service Teacher Enhancement Program]. Progress performance report
The Michigan Technological University Teacher Education Program received funding from the US Department of Energy for the purpose of providing capable and suitably inclined, MTU Engineering and Science students a chance to explore high school level science and mathematics teaching as a career option. Ten undergraduate students were selected from nominations and were paired with mentor teachers for the study. This report covers the experience of the first ten nominees and their participation in the program.
Date:
April 27, 1993
Creator:
Anderson, C. S. & Yarroch, W. L.
Object Type:
Report
System:
The UNT Digital Library
[Michigan Technological University Pre-Service Teacher Enhancement Program]. [Includes a copy of the Student Guide]
The Michigan Technological University Teacher Education Program received funding from the US Department of Energy for the purpose of providing capable and suitably inclined, MTU Engineering and Science students a chance to explore high school level science and mathematics teaching as a career option. Ten undergraduate students were selected from nominations and were paired with mentor teachers for the study. This report covers the experience of the first ten nominees and their participation in the program.
Date:
April 27, 1993
Creator:
Anderson, C.S. & Yarroch, W.L.
Object Type:
Report
System:
The UNT Digital Library
A new atomic mechanism for nuclear isomeric energy release: TE{sup 2}N
In this short note we wish to describe schemes which mix atomic and nuclear energy levels and so permit transfer of nuclear energy to the atomic system from which it is extracted. In addition, we will describe a scheme for stimulating this transfer process which offers the possibility of multi-kilovolt coherent radiation. These ideas are based upon newly available, novel experimental techniques which permit the precise filling of atomic levels and the availability of a broad range of lasers. These new abilities permit the tuning of atomic levels so that they are degenerate or nearly degenerate with nuclear isomeric levels. Such processes permit the exploration of highly leveraged research which could lead to radiation free Ultra High Energy Density Materials in addition to X-Ray Lasers with Gamma ray energies. 2 refs.
Date:
July 27, 1993
Creator:
Anderson, J. D. & Weiss, M. S.
Object Type:
Report
System:
The UNT Digital Library
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cadillac Ranch
Photograph of a scene at the Cadillac Ranch, off Route 66.
Date:
December 27, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History