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205 kA pulse power supply for neutrino focusing horns
A new underground beamline is being constructed at Fermilab to generate and focus a beam of neutrinos on a detector 450 miles away in Soudan, Minnesota. A compact modulator utilizing capacitive energy storage and SCRs as the switching element has been built and tested at Fermilab. The 0.9 F capacitor bank operates at less than 1 kV. It delivers its output of up to 240 kA directly to the two series connected focusing horns via a multi-layer radiation hard stripline [1]. Dual pulse width capability allows for ready selection of 5.2 ms, for slow beam spills, or 2.6 ms operation for reduced thermal stresses on the focusing horns during fast spill. Intended for installation in an underground equipment room, the design incorporates several novel features to facilitate transport, installation, and maintenance. Various designs were examined to arrive at the most economical approach for providing the high pulse currents to the horns located in the very high radiation field, up to 3 x 10{sup 7} kRads/yr absorbed dose of the beamline. These included charge recovery and electronic polarity reversal systems. The direct coupling approach was selected for its overall economy and compactness. The system has been operational for several months and …
Date:
June 21, 2002
Creator:
Kenneth R. Bourkland, Kevin Roon and David Tinsley
Object Type:
Article
System:
The UNT Digital Library
2002 Spring Visitors' Guide (Port Aransas, Tex.)
Spring visitors' guide from Port Aransas, Texas that includes information of interest to visitors along with extensive advertising.
Date:
February 21, 2002
Creator:
Judson, Mary
Object Type:
Newspaper
System:
The Portal to Texas History
The advanced computational testing and simulation toolkit (ACTS)
During the past decades there has been a continuous growth in the number of physical and societal problems that have been successfully studied and solved by means of computational modeling and simulation. Distinctively, a number of these are important scientific problems ranging in scale from the atomic to the cosmic. For example, ionization is a phenomenon as ubiquitous in modern society as the glow of fluorescent lights and the etching on silicon computer chips; but it was not until 1999 that researchers finally achieved a complete numerical solution to the simplest example of ionization, the collision of a hydrogen atom with an electron. On the opposite scale, cosmologists have long wondered whether the expansion of the Universe, which began with the Big Bang, would ever reverse itself, ending the Universe in a Big Crunch. In 2000, analysis of new measurements of the cosmic microwave background radiation showed that the geometry of the Universe is flat, and thus the Universe will continue expanding forever. Both of these discoveries depended on high performance computer simulations that utilized computational tools included in the Advanced Computational Testing and Simulation (ACTS) Toolkit. The ACTS Toolkit is an umbrella project that brought together a number of …
Date:
May 21, 2002
Creator:
Drummond, L. A. & Marques, O. A.
Object Type:
Article
System:
The UNT Digital Library
Advanced High-Temperature Reactor for Production of Electricity and Hydrogen: Molten-Salt-Coolant, Graphite-Coated-Particle-Fuel
The objective of the Advanced High-Temperature Reactor (AHTR) is to provide the very high temperatures necessary to enable low-cost (1) efficient thermochemical production of hydrogen and (2) efficient production of electricity. The proposed AHTR uses coated-particle graphite fuel similar to the fuel used in modular high-temperature gas-cooled reactors (MHTGRs), such as the General Atomics gas turbine-modular helium reactor (GT-MHR). However, unlike the MHTGRs, the AHTR uses a molten salt coolant with a pool configuration, similar to that of the PRISM liquid metal reactor. A multi-reheat helium Brayton (gas-turbine) cycle, with efficiencies >50%, is used to produce electricity. This approach (1) minimizes requirements for new technology development and (2) results in an advanced reactor concept that operates at essentially ambient pressures and at very high temperatures. The low-pressure molten-salt coolant, with its high heat capacity and natural circulation heat transfer capability, creates the potential for (1) exceptionally robust safety (including passive decay-heat removal) and (2) allows scaling to large reactor sizes [{approx}1000 Mw(e)] with passive safety systems to provide the potential for improved economics.
Date:
February 21, 2002
Creator:
Forsberg, Charles W.
Object Type:
Report
System:
The UNT Digital Library
Advanced Oil Recovery Technologies for Improved Recovery from Slope Basin Clastic Reservoirs, Nash Draw Brushy Canyon Pool, Eddy County, New Mexico, Class III
The overall objective of this project is to demonstrate that a development program based on advanced reservoir management methods can significantly improve oil recovery at the Nash Draw Pool (NDP). The plan includes developing a control area using standard reservoir management techniques and comparing its performance to an area developed using advanced reservoir management methods. Specific goals are (1) to demonstrate that an advanced development drilling and pressure maintenance program can significantly improve oil recovery compared to existing technology applications and (2) to transfer these advanced methodologies to oil and gas producers in the Permian Basin and elsewhere throughout the U.S. oil and gas industry.
Date:
February 21, 2002
Creator:
Murphy, Michael B.
Object Type:
Report
System:
The UNT Digital Library
AISI/DOE Technology Roadmap Program Hot Oxygen Injection Into The Blast Furnace
Increased levels of blast furnace coal injection are needed to further lower coke requirements and provide more flexibility in furnace productivity. The direct injection of high temperature oxygen with coal in the blast furnace blowpipe and tuyere offers better coal dispersion at high local oxygen concentrations, optimizing the use of oxygen in the blast furnace. Based on pilot scale tests, coal injection can be increased by 75 pounds per ton of hot metal (lb/thm), yielding net savings of $0.84/tm. Potential productivity increases of 15 percent would yield another $1.95/thm. In this project, commercial-scale hot oxygen injection from a ''thermal nozzle'' system, patented by Praxair, Inc., has been developed, integrated into, and demonstrated on two tuyeres of the U.S. Steel Gary Works no. 6 blast furnace. The goals were to evaluate heat load on furnace components from hot oxygen injection, demonstrate a safe and reliable lance and flow control design, and qualitatively observe hot oxygen-coal interaction. All three goals have been successfully met. Heat load on the blowpipe is essentially unchanged with hot oxygen. Total heat load on the tuyere increases about 10% and heat load on the tuyere tip increases about 50%. Bosh temperatures remained within the usual operating range. …
Date:
October 21, 2002
Creator:
Riley, Michael F.
Object Type:
Report
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 126, No. 38, Ed. 1 Thursday, February 21, 2002
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
February 21, 2002
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 126, No. 42, Ed. 1 Thursday, March 21, 2002
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
March 21, 2002
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 127, No. 25, Ed. 1 Thursday, November 21, 2002
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
November 21, 2002
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
[Alexander Hogg School, (detail front parapet looking south)]
Photograph of the Alexander Hogg School (located at 900 St. Louis Ave) in Fort Worth, Texas.
Date:
May 21, 2002
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
[Alexander Hogg School, (rear (s) and east elevations looking nw)]
Photograph of the Alexander Hogg School (located at 900 St. Louis Ave) in Fort Worth, Texas.
Date:
May 21, 2002
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 103, No. 278, Ed. 1 Monday, January 21, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 21, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 103, No. 305, Ed. 1 Thursday, February 21, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 21, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 6, Ed. 1 Thursday, March 21, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 21, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 31, Ed. 1 Sunday, April 21, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 21, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 56, Ed. 1 Tuesday, May 21, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 21, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 83, Ed. 1 Friday, June 21, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 21, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 108, Ed. 1 Sunday, July 21, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 21, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 135, Ed. 1 Wednesday, August 21, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 21, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 184, Ed. 1 Monday, October 21, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 21, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 211, Ed. 1 Thursday, November 21, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, August 21, 2002
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
August 21, 2002
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
Alvin Sun-Advertiser (Alvin, Tex.), Vol. 111, No. 31, Ed. 1 Sunday, April 21, 2002
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
April 21, 2002
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
Alvin Sun-Advertiser (Alvin, Tex.), Vol. 111, No. 57, Ed. 1 Sunday, July 21, 2002
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
July 21, 2002
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History