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30-60 MHz FWCD system on DIII-D: Power division, phase control and tuning for a four-element antenna array
The 2 MW Fast Wave Current Drive system on DIII-D is intended to provide a near-term demonstration of up to 0.3 MA of current driven by the fast wave. The system used to drive the four element phased antenna array which produces the required directional spectrum is presented. This system must be able to cope with strong coupling between antenna elements and the time-varying plasma load seen by the antennas. Computer modelling shows that this system should be able to maintain a directional spectrum at full power under most anticipated load conditions. 5 refs., 1 fig.
Date:
November 1, 1991
Creator:
Pinsker, R. I.; Mayberry, M. J.; Petty, C. C.; Cary, W. P.; Pusl, J.; Remsen, D. (General Atomics, San Diego, CA (United States)) et al.
Object Type:
Article
System:
The UNT Digital Library
30-60 MHz FWCD system on DIII-D: Power division, phase control and tuning for a four-element antenna array
The 2 MW Fast Wave Current Drive system on DIII-D is intended to provide a near-term demonstration of up to 0.3 MA of current driven by the fast wave. The system used to drive the four element phased antenna array which produces the required directional spectrum is presented. This system must be able to cope with strong coupling between antenna elements and the time-varying plasma load seen by the antennas. Computer modelling shows that this system should be able to maintain a directional spectrum at full power under most anticipated load conditions. 5 refs., 1 fig.
Date:
November 1, 1991
Creator:
Pinsker, R. I.; Mayberry, M. J.; Petty, C. C.; Cary, W. P.; Pusl, J.; Remsen, D. et al.
Object Type:
Article
System:
The UNT Digital Library
110 GHz ECH on DIII-D: System overview and initial operation
A new high power electron cyclotron heating (ECH) system has been introduced on D3-D. This system is designed to operate at 110 GHz with a total output power of 2 MW. The system consists of four Varian VGT-8011 gyrotrons, (output power of 500 kW), and their associated support equipment. All components have been designed for up to a 10 second pulse duration. The 110 GHz system is intended to further progress in rf current drive experiments on D3-D when used in conjunction with the existing 60 GHz ECH (1.6 MW), and the 30--60 MHz ICH (2 MW) systems. H-mode physics, plasma stabilization experiments and transport studies are also to be conducted at 110 GHz. The present system design philosophy was based on experience gained from the existing 60 GHz ECH system. The consequences of these design decisions will be addressed as will the actual performance of various 110 GHz components.
Date:
November 1, 1991
Creator:
Cary, W. P.; Allen, J. C.; Callis, R. W.; Doane, J. L.; Harris, T. E.; Moeller, C. P. et al.
Object Type:
Article
System:
The UNT Digital Library
110 GHz ECH on DIII-D: System overview and initial operation
A new high power electron cyclotron heating (ECH) system has been introduced on D3-D. This system is designed to operate at 110 GHz with a total output power of 2 MW. The system consists of four Varian VGT-8011 gyrotrons, (output power of 500 kW), and their associated support equipment. All components have been designed for up to a 10 second pulse duration. The 110 GHz system is intended to further progress in rf current drive experiments on D3-D when used in conjunction with the existing 60 GHz ECH (1.6 MW), and the 30--60 MHz ICH (2 MW) systems. H-mode physics, plasma stabilization experiments and transport studies are also to be conducted at 110 GHz. The present system design philosophy was based on experience gained from the existing 60 GHz ECH system. The consequences of these design decisions will be addressed as will the actual performance of various 110 GHz components.
Date:
November 1, 1991
Creator:
Cary, W. P.; Allen, J. C.; Callis, R. W.; Doane, J. L.; Harris, T. E.; Moeller, C. P. et al.
Object Type:
Article
System:
The UNT Digital Library
[408 E. Neches]
Photograph of the front of a two-story, Tudor Revival-style brick house located at 408 E. Neches in Palestine, Texas. Perhaps the most noteworthy architectural element is the decorative half-timbered construction on parts of the exterior.
Date:
November 1991
Creator:
McReynolds, Oliver
Object Type:
Photograph
System:
The Portal to Texas History
[12th Armored Division Patch]
Photograph of the 12th Armored Division patch engraved on the side of the Armored Forces Monument. The 13th Armored Division patch is also visible to the right, and text is engraved on the top of the monument.
Date:
November 11, 1991
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
15th Street News (Midwest City, Okla.), Vol. 20, No. 9, Ed. 1 Friday, November 1, 1991
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 1, 1991
Creator:
Kelly, Frank
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 20, No. 10, Ed. 1 Friday, November 8, 1991
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 8, 1991
Creator:
Kelly, Frank
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 20, No. 11, Ed. 1 Friday, November 15, 1991
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 15, 1991
Creator:
Kelly, Frank
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 20, No. 12, Ed. 1 Friday, November 22, 1991
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 22, 1991
Creator:
Kelly, Frank
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
[1991 David Duke political campaign ad]
Video of a political advertisement for David Duke's 1991 campaign for the Louisiana gubernatorial race. Duke was a state representative from the 81st district in the Louisiana House from February 1989 through January 1992.
Date:
November 4, 1991
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
[1991 David Duke political campaign ad]
Video of a political advertisement for David Duke's 1991 campaign for the Louisiana gubernatorial race. Duke was a state representative from the 81st district in the Louisiana House from February 1989 through January 1992.
Date:
November 4, 1991
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
The 1992 World Administrative Radio Conference: Issues for U.S. International Spectrum Policy
This report examines the U.S. preparations process for WARC-92, highlighting efforts to integrate the needs and concerns of various interest groups. It also reviews the forces and trends affecting the United States as it approaches WARC-92, and is intended to inform future congressional oversight of the domestic and international radio communication policy process.
Date:
November 1991
Creator:
United States. Congress. Office of Technology Assessment.
Object Type:
Report
System:
The UNT Digital Library
An ab initio study of the ionization of sodium superoxide
Article on an ab initio study of the ionization of sodium superoxide.
Date:
November 15, 1991
Creator:
Marshall, Paul
Object Type:
Article
System:
The UNT Digital Library
AC microcalorimetry of adsorbates on evaporated metal films: Orientational ordering of H₂ multilayers
We have improved and extended a novel ac calorimetric technique for measuring the heat capacity of adsorbates on evaporated metal films. Metallic substrates are of particular interest in current studies of the thermodynamics of adsorbed molecules. The method described in the present work is only calorimetric technique which allows measurements of molecules on simple metallic surfaces. Among other improvements, we have achieved significant progress in the preparation and characterization of the evaporated metal film. We have applied this novel technique to a study of hydrogen multilayers on gold and sapphire substrates. We have shown that samples of normal-hydrogen with a nominal coverage n of approximately 25 monolayers (ML) undergo a bulk-like orientational ordering transition. The transition is suppressed as the coverage is decreased, and no sign of the transition remains above 1.6 K for n {approx} 1 ML. For n {approx lt} 8 ML, the peak in the heat capacity exhibits signs of finite-size effects. At higher coverages, finite-size effects are not observed, and the shape of the peak depends strongly on the substrate. We conclude that the peak is inhomogeneously broadened for n {approx lt} 8 ML. This work represents the first measurements of the heat capacity due to …
Date:
November 1, 1991
Creator:
Phelps, R.B.
Object Type:
Report
System:
The UNT Digital Library
AC microcalorimetry of adsorbates on evaporated metal films: Orientational ordering of H₂ multilayers
We have improved and extended a novel ac calorimetric technique for measuring the heat capacity of adsorbates on evaporated metal films. Metallic substrates are of particular interest in current studies of the thermodynamics of adsorbed molecules. The method described in the present work is only calorimetric technique which allows measurements of molecules on simple metallic surfaces. Among other improvements, we have achieved significant progress in the preparation and characterization of the evaporated metal film. We have applied this novel technique to a study of hydrogen multilayers on gold and sapphire substrates. We have shown that samples of normal-hydrogen with a nominal coverage n of approximately 25 monolayers (ML) undergo a bulk-like orientational ordering transition. The transition is suppressed as the coverage is decreased, and no sign of the transition remains above 1.6 K for n {approx} 1 ML. For n {approx_lt} 8 ML, the peak in the heat capacity exhibits signs of finite-size effects. At higher coverages, finite-size effects are not observed, and the shape of the peak depends strongly on the substrate. We conclude that the peak is inhomogeneously broadened for n {approx_lt} 8 ML. This work represents the first measurements of the heat capacity due to orientational ordering …
Date:
November 1, 1991
Creator:
Phelps, R. B.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The ACT sup 2 project: Demonstration of maximum energy efficiency in real buildings
A large US utility recently began a project to determine whether the use of new energy-efficient end-use technologies and systems would economically achieve substantial energy savings (perhaps as high as 75% over current practice). Using a field-based demonstration approach, the Advanced Customer Technology Test (ACT{sup 2}) for Maximum Energy Efficiency is providing information on the maximum energy savings possible when integrated packages of new high-efficiency end-use technologies are incorporated into commercial and residential buildings and industrial and agricultural processes. This paper details the underlying rationale, approach, results to date, and future plans for ACT{sup 2}. The ultimate goal is energy efficiency (doing more with less energy) rather than energy conservation (freezing in the dark). In this paper, we first explain why a major United States utility is committed to pursuing demand-side management so aggressively. Next, we discuss the approach the utility chose for conducting the ACT{sup 2} project. We then review results obtained to date from the project's pilot demonstration site. Last, we describe other related demonstration projects being proposed by the utility.
Date:
November 1, 1991
Creator:
Crawley, D.B. (Pacific Northwest Lab., Richland, WA (United States)) & Krieg, B.L. (Pacific Gas and Electric Co., San Ramon, CA (United States))
Object Type:
Article
System:
The UNT Digital Library
The ACT{sup 2} project: Demonstration of maximum energy efficiency in real buildings
A large US utility recently began a project to determine whether the use of new energy-efficient end-use technologies and systems would economically achieve substantial energy savings (perhaps as high as 75% over current practice). Using a field-based demonstration approach, the Advanced Customer Technology Test (ACT{sup 2}) for Maximum Energy Efficiency is providing information on the maximum energy savings possible when integrated packages of new high-efficiency end-use technologies are incorporated into commercial and residential buildings and industrial and agricultural processes. This paper details the underlying rationale, approach, results to date, and future plans for ACT{sup 2}. The ultimate goal is energy efficiency (doing more with less energy) rather than energy conservation (freezing in the dark). In this paper, we first explain why a major United States utility is committed to pursuing demand-side management so aggressively. Next, we discuss the approach the utility chose for conducting the ACT{sup 2} project. We then review results obtained to date from the project`s pilot demonstration site. Last, we describe other related demonstration projects being proposed by the utility.
Date:
November 1, 1991
Creator:
Crawley, D. B. & Krieg, B. L.
Object Type:
Article
System:
The UNT Digital Library
[Addendum November 1991]
A document listing out additions and changes to the NTIEVA program after completing the Texas Commission on the Arts Financial Assistance Application. These will make improvements to the application for submission.
Date:
November 1991
Creator:
North Texas Institute for Educators on the Visual Arts
Object Type:
Text
System:
The UNT Digital Library
The administrative record. RCRA/CERCLA Information Brief
EPA requires that an administrative record be established at facilities undergoing response actions under Sections 113(k) of the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). While an administrative record is established by the regulators under RCRA, DOE is recommending that DOE facilities also maintain all decision-making documentation. This information brief provides answers to questions regarding the administrative record requirements under CERCLA and under the proposed RCRA corrective action rulemaking.
Date:
November 1, 1991
Creator:
Powers, J.
Object Type:
Report
System:
The UNT Digital Library
The administrative record. RCRA/CERCLA Information Brief
None
Date:
November 1, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced coal-fueled gas turbine systems. Technical progress report, July--September 1991
Five slagging combustor tests (CR1-2 through CR1-6) were conducted. Since integrating the slagging cyclone separator into the combustor system, noticeable quantities of char have been collected in the cyclone slag bucket and detected in the exhaust gases. The primary purpose of the CR1-X series of tests was to quantify the amount of char produced by the subscale slagging combustor system. The secondary purpose of this test series was to quantify the slag separation efficiency of the curved body impact separator and to acquire more information on the operation of the slagging cyclone separator. Test CR1-1 was conducted with a fully configured system, i.e., the curved body impact separator, slag tap bath, and slagging cyclone were installed. The CR1-1 data constitutes a baseline for the char production problem. For test CR1-2, the curved body impact separator and slag tap were removed and the centerbody impact separator was installed. This was done to recheck the relative influence of the curved body impact separator and slag tap bath on char production; also, to acquire additional data on the slag collection efficiency of the centerbody impact separator and slagging cyclone. The latter was used for deducing accurately the collection efficiency of the curved body …
Date:
November 6, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
An advanced plasma control system for the DIII-D tokamak
An advanced plasma control system is being implemented for the DIII-D tokamak utilizing digital technology. This system will regulate the position and shape of tokamak discharges that range from elongated limiter to single-null divertor and double-null divertor with elongation as high as 2.6. Development of this system is expected to lead to control system technology appropriate for use on future tokamaks such as ITER and BPX. The digital system will allow for increased precision in shape control through real time adjustment of the control algorithm to changes in the shape and discharge parameters such as {beta}{sub p}, {ell}{sub i} and scrape-off layer current. The system will be used for research on real time optimization of discharge performance for disruption avoidance, current and pressure profile control, optimization of rf antenna loading, or feedback on heat deposition patterns through divertor strike point position control, for example. Shape control with this system is based on linearization near a target shape of the controlled parameters as a function of the magnetic diagnostic signals. This digital system is unique in that it is designed to have the speed necessary to control the unstable vertical motion of highly elongated tokamak discharges such as those produced in …
Date:
November 1, 1991
Creator:
Ferron, J. R.; Kellman, A.; McKee, E.; Osborne, T.; Petrach, P.; Taylor, T. S. et al.
Object Type:
Article
System:
The UNT Digital Library
An advanced plasma control system for the DIII-D tokamak
An advanced plasma control system is being implemented for the DIII-D tokamak utilizing digital technology. This system will regulate the position and shape of tokamak discharges that range from elongated limiter to single-null divertor and double-null divertor with elongation as high as 2.6. Development of this system is expected to lead to control system technology appropriate for use on future tokamaks such as ITER and BPX. The digital system will allow for increased precision in shape control through real time adjustment of the control algorithm to changes in the shape and discharge parameters such as {beta}{sub p}, {ell}{sub i} and scrape-off layer current. The system will be used for research on real time optimization of discharge performance for disruption avoidance, current and pressure profile control, optimization of rf antenna loading, or feedback on heat deposition patterns through divertor strike point position control, for example. Shape control with this system is based on linearization near a target shape of the controlled parameters as a function of the magnetic diagnostic signals. This digital system is unique in that it is designed to have the speed necessary to control the unstable vertical motion of highly elongated tokamak discharges such as those produced in …
Date:
November 1991
Creator:
Ferron, J. R.; Kellman, A.; McKee, E.; Osborne, T.; Petrach, P.; Taylor, T. S. et al.
Object Type:
Article
System:
The UNT Digital Library