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Fundamental mode rectangular waveguide system for electron-cyclotron resonant heating (ECRH) for tandem mirror experiment-upgrade (TMX-U)
We present a brief history of TMX-U's electron cyclotron resonant heating (ECRH) progress. We emphasize the 2-year performance of the system, which is composed of four 200-kW pulsed gyrotrons operated at 28 GHz. This system uses WR42 waveguide inside the vacuum vessel, and includes barrier windows, twists, elbows, and antennas, as well as custom-formed waveguides. Outside the TMX-U vessel are directional couplers, detectors, elbows, and waveguide bends in WR42 rectangular waveguide. An arc detector, mode filter, eight-arm mode converter, and water load in the 2.5-in. circular waveguide are attached directly to the gyrotron. Other specific areas discussed include the operational performance of the TMX-U pulsed gyrotrons, windows and component arcing, alignment, mode generation, and extreme temperature variations. Solutions for a number of these problems are described.
Date:
December 1, 1983
Creator:
Rubert, R.R.; Felker, B.; Stallard, B.W. & Williams, C.W.
Object Type:
Article
System:
The UNT Digital Library
Application of nuclear resonance scattering for in vivo measurements
Nuclear resonance scattering is applied in our laboratory to measure hepatic and cardiac iron overload. For iron analysis, a gaseous source of 4 mg MnCl/sub 2/ is introduced into an evacuated quartz vial. Following irradiation in a nuclear reactor, /sup 56/Mn decays by beta emission to the 847-keV level of /sup 56/Fe, which subsequently decays to the ground state of /sup 56/Fe with a 7 ps half-life. The principal aim of this work is to evaluate the efficacy of the iron chelation therapy. Serial measurements over a time period of 6 to 12 months of a given patient will enable us to see how the iron is removed from the critical organs.
Date:
January 1, 1983
Creator:
Wielopolski, L.; Vartsky, D. & Cohn, S.H.
Object Type:
Article
System:
The UNT Digital Library
Interpretation of interference data from the Klamath Falls, Oregon geothermal resource
Data from a seven week pressure interference test in the Klamath Falls, Oregon geothermal resource have been analyzed. The data indicate that productive wells are fed by a highly permeable fracture network and that the less permeable matrix blocks contribute significantly to the reservoir storage capacity. Detailed analysis of data from two wells is presented. Data from both of the wells yield a reservoir permeability-thickness (kh) of approximately 1.3x10/sup 6/ md-ft and a storativity (phi c/sub t/h) of 6.8x10/sup -3/ ft/psi. The parameters (lambda and ..omega..), which are determined by the distribution of permeability and storativity between the matrix and fractures, vary by more than an order of magnitude. A sensitivity study shows that for these wells, the pressure transients are not very sensitive to the distribution of permeability and storativity between the fractures and matrix blocks. No hydrologic boundaries were detected during the test. This indicates that the fault which supplies hot water to the shallow hydrothermal system does not behave according to the classical model of either a barrier or constant potential boundary.
Date:
November 1, 1983
Creator:
Benson, S.M.
Object Type:
Article
System:
The UNT Digital Library
Low-Btu coal gasification in the United States: company topical. [Brick producers]
Hazelton and other brick producers have proved the reliability of the commercial size Wellman-Galusha gasifier. For this energy intensive business, gas cost is the major portion of the product cost. Costs required Webster/Hazelton to go back to the old, reliable alternative energy of low Btu gasification when the natural gas supply started to be curtailed and prices escalated. Although anthracite coal prices have skyrocketed from $34/ton (1979) to over $71.50/ton (1981) because of high demand (local as well as export) and rising labor costs, the delivered natural gas cost, which reached $3.90 to 4.20/million Btu in the Hazelton area during 1981, has allowed the producer gas from the gasifier at Webster Brick to remain competitive. The low Btu gas cost (at the escalated coal price) is estimated to be $4/million Btu. In addition to producing gas that is cost competitive with natural gas at the Webster Brick Hazelton plant, Webster has the security of knowing that its gas supply will be constant. Improvements in brick business and projected deregulation of the natural gas price may yield additional, attractive cost benefits to Webster Brick through the use of low Btu gas from these gasifiers. Also, use of hot raw gas (that …
Date:
July 1, 1983
Creator:
Boesch, L. P.; Hylton, B. G. & Bhatt, C. S.
Object Type:
Report
System:
The UNT Digital Library
Studies involving high temperature desulfurization/regeneration reactions of metal oxides for fuel cell development. Final report
Research conducted at Giner, Inc. during 1981 to 1983 under the present contract has been a continuation of the investigation of a high temperature regenerable desulfurization process capable of reducing the sulfur content in coal gases from 200 ppM to 1 ppM. The overall objective has been the integration of a coal gasifier with a molten carbonate fuel cell, which requires that the sulfur content be below 1 ppM. Commercially available low temperature processes incur an excessive energy penalty. Results obtained with packed-bed and fluidized bed reactors have demonstrated that a CuO/ZnO mixed oxide sorbent is regenerable and capable of lowering the sulfur content (as H/sub 2/S and COS) from 200 ppM in simulated hot coal-derived gases to below 1 ppM level at 600 to 650/sup 0/C. Four potential sorbents (copper, tungsten oxide, vanadium oxide and zinc oxide) were initially selected for experimental use in hot regenerable desulfurization in the temperature range 500 to 650/sup 0/C. Based on engineering considerations, such as desulfurization capacity in per weight or volume of sorbents, a coprecipitated CuO/ZnO was selected for further study. A structural reorganization mechanism, unique to mixed oxides, was identified: the creation of relatively fine crystallites of the sulfided components (Cu/sub …
Date:
October 1, 1983
Creator:
Jalan, V.
Object Type:
Report
System:
The UNT Digital Library
Review of negative ion source technology
H/sup -/ or D/sup -/ ions are required for generating high energy neutral beams in heating fusion plasmas. Two distinct types of H/sup -/ ion sources can be identified: (1) surface sources - in which the H/sup -/ ions are generated by particle collisions with low work function metal surfaces; and (2) volume sources - in which the H/sup -/ ions are produced by electron-molecules and electron-ion collision processes in the volume of a hydrogen discharge. Recent experiments demonstrate that reasonable H/sup -/ ion current density can be obtained from both types of sources. However, further technology must be developed on the control of cesium and the reduction of electron drain before these sources become practical units of a multi-ampere neutral beam injection system.
Date:
December 1, 1983
Creator:
Leung, K. N.
Object Type:
Article
System:
The UNT Digital Library
Jets in e/sup +/e/sup -/ annihilation
We have a simple perturbative picture of the production of hadrons from e/sup +/e/sup -/ annihilations which works quite well in predicting the main features of this interaction. It explains the magnitude of the total cross-section, the basic two-jet structure, and the final state angular distributions. It is also consistent with our present ideas about the structure of hadronic matter and the requirement that at high enough energies, the corrections due to strong interactions are small and hence treatable in a perturbative sense. We have seen, however, that to progress beyond this point requires a detailed model of fragmentation phenomena and that differences in models prevent us from making clean predictions about QCD. It is therefore important that we continue to study the fragmentation process and try to parameterize it as well as possible. Large amounts of experimental data are now available on this subject, and new tests will become available as experimenters look in more detail at the behavior of quantum number correlations and energy dependent effects. In doing this, it will be important to keep in mind that mass effects can yield significant energy variations in the model parameters. Our eventual goal should be to find ways of …
Date:
October 1, 1983
Creator:
Hollebeek, R.
Object Type:
Article
System:
The UNT Digital Library
Slow Dance on a Burial Ground
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Use of this item is restricted to the UNT Community
Recording of Stephen Montague's "Slow Dance on a Burial Ground." Inspired by multi-traking and over-dubbling in pop music. Montague plays all various individual parts on folk flutes and log drums, playing at various speeds and other manipulations in an electronic studio to create at virtuosic product, even with modest skills on the instruments. The piece is an exploration in "Romantic minimalism," with its monthematic unfolding of a melody in the dorian mode and static harmony, but also with 18th/19th form influence.
Date:
1983
Creator:
Montague, Stephen
Object Type:
Sound
System:
The UNT Digital Library
Deca-Danse
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Use of this item is restricted to the UNT Community
Recording of Alain Thibault's Deca-Danse. Using a recording of a speech by President Ronald Reagan, Thibault makes a statement about the destruction that humans cause for one another. Th piece is split into ten sections: 1. Technopolis; 2. You are Loved; 3. Special Emission; 4. President's Message; 5. Reagan's Happiness; 6. Reagan's Delirium; 7. The Most Beautiful Gift of God; 8. Generation x; 9. Mx; 10. Future x. The piece was created at the Studios Bruit Blanc and McGill University.
Date:
1983
Creator:
Thibault, Alain, 1956-
Object Type:
Sound
System:
The UNT Digital Library
Tess In Stonehenge
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Recording of Lelio Camilleri's Tess In Stonehenge. The piece explores the relationship between fast sound structures and sounds with a longer duration and different types of envelopes. The sound equipment consists of filtered white noise bands, frequency modulated bands, and sound structures obtained by the control voltage technique.
Date:
1983
Creator:
Camilleri, Lelio
Object Type:
Sound
System:
The UNT Digital Library
La poëtique de l'espace
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Use of this item is restricted to the UNT Community
Recordings of Yuji Itoh's La poëtique de l'espace for prepared piano. The composer has no real structure for this work, only wanting to let the audience listen to experiences. The work was realized in Studio STGU under the technical direction of Professor S. Sumitani.
Date:
1983
Creator:
Itoh, Yuji, 1956-
Object Type:
Sound
System:
The UNT Digital Library
Broken Crystals
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Use of this item is restricted to the UNT Community
Recording of Larry Wendt's Broken Crystals, from "World-Class Technology." It is an extended narration piece that takes the form of a personal recollection. It is narrated by a Silicon Valley worker who works for an integrated circuit foundary that grows garnet crystals for the manufacturing of bubble memory. The factory is overcome with insects that destroy the crystals, and, in response, Silicon Valley is bombed with Cane Toads in order to get rid of the bugs. As a performance piece, the narrative would be read live while the background tape of manipulated environmental sounds along with a vocal processing device to allow immediacy to the live performance. Sometimes performed with theatrics or projected slides.
Date:
1983
Creator:
Wendt, Larry
Object Type:
Sound
System:
The UNT Digital Library
Kren
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Use of this item is restricted to the UNT Community
Recording of Åke Parmerud's "Kren," a concert piece. The title is an acronym of time (the clock) and energy: Kronos an Energy (KREN). The main idea for this piece was to create an electric world loaded with sound events that were emitted in a regular way. The work was created in Stockholm's EMS Studios and was commissioned by the Swedish Institute for National Concerts in 1983.
Date:
1983/1984
Creator:
Parmerud, Åke, 1953-
Object Type:
Sound
System:
The UNT Digital Library
Rag, Rag, Rag
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Use of this item is restricted to the UNT Community
Recordings of Marek Choloniewski's "Rag, Rag, Rag" (includes five recordings, the last of which is a reduction). The piece is a transcription of the constructions of instrumental music with added electronic improvisation. Traditions of contemporary music meet those of jazz and rock, giving the piece a three part structure.
Date:
1983
Creator:
Chołoniewski, Marek, 1953-
Object Type:
Sound
System:
The UNT Digital Library
Mu Song
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Use of this item is restricted to the UNT Community
Recording of Richard Karpen's Mu Song. Karpen used the programs "Music II" sound synthesis language and "Score II" not list preprocessor in the composition of this piece. It was realized at the Center for Computer Music at Brooklyn College, City University of New York.
Date:
1983
Creator:
Karpen, Richard, 1957-
Object Type:
Sound
System:
The UNT Digital Library
Pax
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Use of this item is restricted to the UNT Community
Recording of Gottfried Martin's Pax for tape. Includes electronic and natural sounds, including voice, news recordings, and recordings of war sounds.
Date:
1983
Creator:
Martin, Gottfried
Object Type:
Sound
System:
The UNT Digital Library
Sensors IV
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Use of this item is restricted to the UNT Community
Recording of Alcides Lanza's Sensors IV performed in 1984 by the McGill Concert Choir, conducted by Christopher Reynolds. The tape was realized at the Composer's studio (SHELAN Studio) and McGill University EMS in Montreal, QC, Canada. The piece explores different techniques of vocal wiring, especially the relationship of semantics, languages, and memory. The word "Memory" constitutes the entire text for the piece - using letter sound, recombinations of the word, and adding syllables from other languages that share similar etymology. Recording of the word "memories" -- Meg Sheppard's voice -- is used in the realization of the piece.
Date:
1983/1984
Creator:
Lanza, Alcides
Object Type:
Sound
System:
The UNT Digital Library
The Song of Ainur
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Use of this item is restricted to the UNT Community
Recording of Jouko Suonio's The Song of Ainur. Composed at the Experimental Music Studio of Finnish broadcasting Company "Yle."
Date:
1983
Creator:
Suonio, Jouko
Object Type:
Sound
System:
The UNT Digital Library
Brumes
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Use of this item is restricted to the UNT Community
Recording of Roland Yvanez's "Brumes" for solo magnetic tape. The title translates to "Mists." The piece evokes the relationship between water and air on the surface of the ocean.
Date:
1983
Creator:
Yvanez, Roland
Object Type:
Sound
System:
The UNT Digital Library
Des nombres et des mots
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Use of this item is restricted to the UNT Community
Recording of Louis Chretiennot's "Des nombres et des mots." The piece begins with a man reciting numbers 1-10 in French; after the first reading, electronic manipulation is added.
Date:
1983
Creator:
Chrétiennot, Louis 1954-
Object Type:
Sound
System:
The UNT Digital Library
Métabole n° 1
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Use of this item is restricted to the UNT Community
Recording of Roland Cahen's Métabole n° 1. The atmosphere of the piece is that of a place of "dark clouds like the sky of Flanders." It was realized at the IPEM of Ghent in Belgium headed by Lucien Goethals. The piece is one of Cahen's first musical compositions.
Date:
1983
Creator:
Cahen, Roland 1958-
Object Type:
Sound
System:
The UNT Digital Library
Forty-three (43)
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Use of this item is restricted to the UNT Community
Recording of Pril Smiley's Forty-three (43). The sounds of this piece are structured in complicated layers that induce a kind of "x-ray hearing," focusing on different events within the texture.
Date:
1983
Creator:
Smiley, Pril, 1943-
Object Type:
Sound
System:
The UNT Digital Library
Ambiversion
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Use of this item is restricted to the UNT Community
Recording of Tera de Marez Oyen's Ambiversion performed by Harry Sparnaay, bass clarinetist.
Date:
1983
Creator:
Marez Oyens, Tera de 1932-1996
Object Type:
Sound
System:
The UNT Digital Library
Shift of Emphasis
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Use of this item is restricted to the UNT Community
Recording of Maria Luisa Bon's Shift of Emphasis. The piece was composed at the Computational Sonoma Center of the University of Padua. It is based on 21 complex sound blocks, each having a different structure and origin.
Date:
1983
Creator:
Bon, Maria Luisa
Object Type:
Sound
System:
The UNT Digital Library