Access
Resource Type
Partner
UNT Libraries Government Documents Department
8,525
UNT College of Arts and Sciences
148
UNT College of Science
69
UNT College of Engineering
49
UNT College of Liberal Arts & Social Sciences
18
UNT College of Information
17
UNT Libraries
14
UNT Libraries Special Collections
13
UNT College of Education
10
University of North Texas
9
12 More
Collection
Office of Scientific & Technical Information Technical Reports
8,524
UNT Scholarly Works
359
LGBT Collections
5
D. Jack Davis Art Education Collection
4
The Society Diaries Collection
4
John J. Herrera Papers
3
Texas Cultures Online
3
Dennis Vercher Collection (The Dallas Way)
2
Jack Evans and George E. Harris Collection (The Dallas Way)
2
O. Henry Project
2
6 More
Serial/Series Title
Publicity Articles
4
Charles C. Francis Papers, 1911-2013
1
Educating Able Learners
1
Gay Games IV: June 18-25, 1994
1
Parkland Lawsuit - Dialog, 1988
1
Proceedings of the Workshop on Crystalline Silicon Solar Cells and Modules: Materials and Processes
1
Series 2: Accretion : Biographical Sketch - Evans and Harris Wedding
1
Sub-Antarctic Biocultural Conservation Program
1
Sub-Series 2: Correspondence : Emails, November 2011
1
States
Decade
Month
Language
8,905 Matching Results
Results open in a new window/tab.
Abstracts submitted for the thirty-first annual meeting, Division of Plasma Physics, November 13--17, 1989
This report contains abstracts of papers that are submitted for the 31st annual meeting of the Division of Plasma Physics, November 13--17, 1989. (LSP)
Date:
September 1, 1989
Creator:
unknown
System:
The UNT Digital Library
He abundance variations in the solar wind: Observations from Ulysses
The Ulysses mission is providing the first opportunity to observe variations in solar wind plasma parameters at heliographic latitudes far removed from the ecliptic plane. We present an overview of the solar wind speed and the variability in helium abundance, [He] data on [He] in six high latitude coronal mass ejections (CMEs), and a superposed epoch analysis of [He] variations at the seven heliospheric current sheet (HCS) crossings made during the rapid-latitude-scan portion of the mission. The differences in the variability of the solar wind speed and [He] in high latitude and equatorial regions are quite striking. Solar wind speed is generally low but highly variable near the solar equator, while at higher latitudes the average speed is quite high with little variability. [He] can vary over nearly two decades at low solar latitudes, while at high latitudes it varies only slightly. In contrast to the high [He] that is commonly associated with CMEs observed in the ecliptic, none of the six high-speed CMEs encountered at high southern heliographic latitudes showed any significant variation in helium content. A superposed epoch analysis of the [He] during all seven HCS crossings made as Ulysses passed from the southern to northern solar hemisphere …
Date:
September 1, 1995
Creator:
Barraclough, Bruce L.; Gosling, John T.; Phillips, John L.; McComas, David J.; Feldman, William C. & Goldstein, Bruce E.
System:
The UNT Digital Library
Ac critical currents of commercial Nb$sub 3$Sn tapes
None
Date:
September 30, 1974
Creator:
Garber, M.; Shen, S.; Bussiere, J. & Morgan, G.
System:
The UNT Digital Library
AC Dipole Based Optics Measurement and Correction at RHIC
N/A
Date:
September 29, 2013
Creator:
Shen, X.; Lee, S. Y.; Bai, M.; White, S.; Tomas, R.; Robert-Demolaize, G. et al.
System:
The UNT Digital Library
Ac loss measurement of SSC dipole magnets
AC losses in full length and 1.5 m model SSC collider dipoles were successfully measured by the direct observation of energy flow into and out of magnets during a ramp cycle. The measurement was performed by using two double-integrating type digital volt meters (DVM's) for current and voltage measurement. Measurements were performed for six is m long ASST magnets and five 1.5 m long model magnets, inducting one 40 mm diameter magnet. There were large variations in the eddy current losses. Since these magnets use conductors with slight deviations in their internal structures and processing of the copper surface depending on the manufacturer, it is likely that there are differences in the contact resistance between strands. Correlation between the ramp rate dependence of the,quench current and the eddy current loss was evident.
Date:
September 1, 1992
Creator:
Delchamps, S.; Hanft, R.; Jaffery, T.; Kinney, W.; Koska, W.; Lamm, M. J. et al.
System:
The UNT Digital Library
AC Loss Measurement of SSC Dipole Magnets
AC losses in full length and 1.5 m model SSC collider dipoles were successfully measured by the direct observation of energy flow into and out of magnets during a ramp cycle. The measurement was performed by using two double-integrating type digital volt meters (DVM`s) for current and voltage measurement. Measurements were performed for six is m long ASST magnets and five 1.5 m long model magnets, inducting one 40 mm diameter magnet. There were large variations in the eddy current losses. Since these magnets use conductors with slight deviations in their internal structures and processing of the copper surface depending on the manufacturer, it is likely that there are differences in the contact resistance between strands. Correlation between the ramp rate dependence of the,quench current and the eddy current loss was evident.
Date:
September 1992
Creator:
Delchamps, S.; Hanft, R.; Jaffery, T.; Kinney, W.; Koska, W.; Lamm, M. J. et al.
System:
The UNT Digital Library
AC loss measurements of model and full size 50mm SSC collider dipole magnets at Fermilab
Tests have recently been performed at Fermilab in order to measure the energy losses due to eddy currents and iron and superconductor magnetization. These measurements were performed on six 1.5m long model magnets and eight 15m long full scale collider dipole magnets. AC losses were measured as a function of ramp rate using sawtooth ramps from 500, to 5000 Amps for both types of magnets, while bipolar studies were additionally performed on some of the short magnets. The measured magnet voltage and current for a complete cycle are digitally integrated to yield the energy loss per cycle. Measurement reproducibility is typically 5%, with good agreement between long magnet measurements and extrapolations from short magnet measurement results. Magnetization loss measurements among similar magnet types agree to within experimental error, while eddy current losses correlate strongly with the observed dependence of quench current on ramp rate.
Date:
September 1, 1992
Creator:
Ozelis, J. P.; Delchamps, S. W.; Gourlay, S.; Jaffery, T.; Kinney, W.; Koska, W. et al.
System:
The UNT Digital Library
AC loss measurements of model and full size 50mm SSC collider dipole magnets at Fermilab
Tests have recently been performed at Fermilab in order to measure the energy losses due to eddy currents and iron and superconductor magnetization. These measurements were performed on six 1.5m long model magnets and eight 15m long full scale collider dipole magnets. AC losses were measured as a function of ramp rate using sawtooth ramps from 500, to 5000 Amps for both types of magnets, while bipolar studies were additionally performed on some of the short magnets. The measured magnet voltage and current for a complete cycle are digitally integrated to yield the energy loss per cycle. Measurement reproducibility is typically 5%, with good agreement between long magnet measurements and extrapolations from short magnet measurement results. Magnetization loss measurements among similar magnet types agree to within experimental error, while eddy current losses correlate strongly with the observed dependence of quench current on ramp rate.
Date:
September 1, 1992
Creator:
Ozelis, J. P.; Delchamps, S. W.; Gourlay, S.; Jaffery, T.; Kinney, W.; Koska, W. et al.
System:
The UNT Digital Library
AC losses in Bi-2223 tapes and in the 1-kA transmission line model.
We present here results of our study of the 5-m-long AC transmission tine model with 1 kA current capability at 77 K. Primary attention was paid to the current characteristics and AC losses in individual tapes and in the core of the cable. The losses were measured as a function of AC magnetic field amplitude in various orientations of magnetic field with respect to the plane of the tape and filaments. Hysteresis losses were. close to the losses in the AC regime, meaning that eddy current losses in tapes may be neglected when compared with hysteresis losses. We designed and constructed a 5-m-long model of the AC transmission line using multi filamentary Bi-2223 tapes. The current core of the model contains 120 tapes for the forward line and 120 tapes for the backward line. The AC losses in the current core were substantially greater than those seen in the individual tapes. The reason for this is related to a complex magnetic field distribution inside the current core.
Date:
September 4, 1998
Creator:
Fisher, L. M.
System:
The UNT Digital Library
Ac losses of Nb$sub 3$Sn
None
Date:
September 30, 1974
Creator:
Bussiere, J.F.; Garber, M. & Suenaga, M.
System:
The UNT Digital Library
AC Losses of Prototype HTS Transmission Cables
Since 1995 Southwire Company and Oak Ridge National Laboratory (ORNL) have jointly designed, built, and tested nine, l-m long, high temperature superconducting (HTS) transmission cable prototypes. This paper summarizes the AC loss measurements of five of the cables not reported elsewhere, and compares the losses with each other and with theory developed by Dresner. Losses were measured with both a calorimetric and an electrical technique. Because of the broad resistive transition of the HTS tapes, the cables can be operated stably beyond their critical currents. The AC losses were measured in this region as well as below critical currents. Dresner's theory takes into account the broad resistive transition of the HTS tapes and calculates the AC losses both below and above the critical current. The two sets of AC 10SS data agree with each other and with the theory quite welL In particular, at low currents of incomplete penetration, the loss data agree with the theoretical prediction of hysteresis loss based on only the outer two Iayers carrying the total current.
Date:
September 13, 1998
Creator:
Demko, J.A.; Dresner, L.; Hughey, R.L.; Lue, J.W.; Olsen, S.K.; Sinha, U. et al.
System:
The UNT Digital Library
AC magnetic field losses in BSCCO-2223 superconducting tapes
The AC magnetic losses at power frequencies (60 Hz) were investigated for mono- and multifilament Ag-sheathed (Bi, Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y} (BSCCO-2223) tapes with similar transport critical current (I{sub c}) values at 77 K. The multifilament sample exhibited higher losses than the monofilament under the same conditions. Loss peaks are discussed in terms of intergranular, intragranular and eddy current losses. Because of BSCCO`s anisotropy, field orientation has a large effect on the magnitude of these peaks, even at relatively small angles. Losses for fields applied parallel to the c-axis of the textured BSCCO grains are larger by more than one order of magnitude than those applied perpendicular.
Date:
September 1, 1997
Creator:
Lelovic, M.; Mench, S. & Deis, T.
System:
The UNT Digital Library
AC magnetic measurements of the ALS Booster Synchrotron Dipole Magnet engineering model
We made a minimal set of AC magnetic measurements of the engineering model of the ALS Booster Dipole Magnet as part of the process of qualifying its design for production. Magnetic induction integrals over paths approximating electron-beam trajectories were measured with long curved coils connected to an electronic integrator. Magnetic induction was measured with point coils and an integrator and independently with a Hall-effect Gaussmeter. These quantities, and magnet current, were displayed on a commercial digital storage oscilloscope as parametric functions of time. The displayed waveforms were stored, processed and redisplayed as representations of selected magnet parameters. A waveform representing the magnet's effective-length was created by dividing the integral waveform by the magnetic induction waveform. Waveforms of the transfer functions were produced by dividing both the integral waveform and the magnetic induction waveform by the current waveform. Pairs of matched coils, connected in series opposition, provided differential measurements of field uniformity. Quadrupole and sextupole coefficients were derived from the uniformity data. These magnet parameters were measured at 2 and 10 Hz frequencies. Together with measurements of the magnetic field at selected dc levels, the ac measurements demonstrated that the magnet design met specifications and qualified it for production. 7 refs., …
Date:
September 1, 1988
Creator:
Green, M.I.; Hoyer, E.; Keller, R. & Nelson, D.H.
System:
The UNT Digital Library
Accelerated cleanup of mixed waste units on the Hanford Site, Richland, Washington
This report provides a status of the expedited response action (ERA) projects currently being implemented at the Hanford Site. A detailed review of the accomplishments to date, the technologies employed, the problems encountered, and an analysis of the lessons learned are included. A total of nine ERAs have been initiated at the Hanford Site and are presented in a case study format with emphasis on the progress being made and the challenges ahead.
Date:
September 1, 1993
Creator:
Patterson, J. K.; Johnson, W. L. & Downey, H. D.
System:
The UNT Digital Library
Accelerated Closure of the Hanford Site
Cleanup of the Hanford Site is currently planned to take until 2046 and another approximately $SOB. In the summer of 1999, Fluor Hanford initiated an ''Accelerated Closure Team'' to evaluate opportunities to reduce this long schedule and high cost for the parts of the Hanford Site which they manage. To-date, this breakthrough team has developed two approaches which will move > 50 million curies away from the Columbia River sooner than planned and at a significantly reduced cost. The approaches successfully applied so far are presently being applied to other opportunities at Hanford.
Date:
September 20, 2000
Creator:
WILDE, R.T.
System:
The UNT Digital Library
Accelerated life-time testing and resistance degradation of thin-film decoupling capacitors
Resistance degradation in PZT thin-film capacitors has been studied as a function of applied voltage, temperature, and film composition. It is found that the mean-time-to-failure (life-time or t{sub f}) of the capacitors shows a power law dependence on applied voltage of he form t{sub f} {proportional_to} V{sup {minus}n} (n {approximately} 4--5). The capacitor life-time also exhibits a temperature dependence of the form t{sub f} {proportional_to} exp(E{sub a}/kT), with an activation energy of {approximately} 0.8 eV. The steady-state leakage current in these samples appears to be bulk controlled. The voltage, temperature, and polarity dependence of the leakage current collectively suggest a leakage current mechanism most similar to a Frenkel-Poole process. The life-time and leakage current of the Nb-doped PZT films are superior to the undoped PZT films. This result can be explained based on the point-defect chemistry of the PZT system. Finally, the results indicate that the Nb-doped PZT films meet the essential requirements for decoupling capacitor applications.
Date:
September 1, 1996
Creator:
Al-Shareef, H. & Dimos, D.
System:
The UNT Digital Library
ACCELERATED MONTE CARLO FOR PARTICLE DISPERSION
None
Date:
September 1, 2000
Creator:
FITZGERALD, M. & PICARD, R.
System:
The UNT Digital Library
The Accelerated Site Technology Deployment Program/Segmented Gate System Project
The Department of Energy (DOE) is working to accelerate the acceptance and application of innovative technologies that improve the way the nation manages its environmental remediation problems. The DOE Office of Science and Technology established the Accelerated Site Technology Deployment Program (ASTD) to help accelerate the acceptance and implementation of new and innovative soil and ground water remediation technologies. Coordinated by the Department of Energy's Idaho Office, the ASTD Program reduces many of the classic barriers to the deployment of new technologies by involving government, industry, and regulatory agencies in the assessment, implementation, and validation of innovative technologies. Funding is provided through the ASTD Program to assist participating site managers in implementing innovative technologies. The program provides technical assistance to the participating DOE sites by coordinating DOE, industry, and regulatory participation in each project; providing finds for optimizing full-scale operating parameters; coordinating technology performance monitoring; and by developing cost and performance reports on the technology applications.
Date:
September 18, 2000
Creator:
PATTESON,RAYMOND
System:
The UNT Digital Library
Accelerating EUV learning with synchrotron light: Mask roughness challenges ahead
None
Date:
September 1, 2011
Creator:
Naulleau, Patrick; Goldberg, Kenneth A.; Gullikson, Eric; Mochi, Iacopo; McClinton, Brittany & Rastegar, Abbas
System:
The UNT Digital Library
Acceleration and Storage of Polarized Proton Beam at RHIC
None
Date:
September 12, 1999
Creator:
Roser, T.
System:
The UNT Digital Library
Acceleration and transportation of multiple ion species at EBIS-based preinjector
N/A
Date:
September 17, 2012
Creator:
Raparia, D.
System:
The UNT Digital Library
Acceleration of Electrons in the Near Field of Lower Hybrid Frequency Grills
On Tore Supra, during lower hybrid (LH) current drive experiments, localized heat flux deposition is observed on plasma facing components such as the guard limiters of the LH grills or any object which is magnetically connected to the LH launching waveguides : modular low-field side limiters, ion cyclotron heating antennas, inner first wall. Similar observations have been made on the divertor plates and limiters of TdeV. In particular, by alternating the rf powers of the 2 grills of Tore Supra, it was shown that the heat flux on the tiles of the guard limiters is related to the local electric field but not with the convective power. We present here a model of acceleration of electrons in the near field of LH antennas. Results of this model are compared to experimental results.
Date:
September 1, 1996
Creator:
Goniche, M.; Mailloux, J.; Demers, Y.; Jacquet, P.; Bibet, P.; Froissard, P. et al.
System:
The UNT Digital Library
Acceleration of Polarized Protons at Rhic.
Relativistic Heavy Ion Collider (RHIC) ended its second year of operation in January 2002 with five weeks of polarized proton collisions. Polarized protons were successfully injected in both RHIC rings and maintained polarization during acceleration up to 100 GeV per ring using two Siberian snakes in each ring. This is the first time that polarized protons have been accelerated to 100 GeV. The machine performance and accomplishments during the polarized proton run will be reviewed. The plans for the next polarized proton run will be outlined.
Date:
September 9, 2002
Creator:
Huang, H.
System:
The UNT Digital Library
Acceleration of Radiance for Lighting Simulation by Using Parallel Computing with OpenCL
We report on the acceleration of annual daylighting simulations for fenestration systems in the Radiance ray-tracing program. The algorithm was optimized to reduce both the redundant data input/output operations and the floating-point operations. To further accelerate the simulation speed, the calculation for matrix multiplications was implemented using parallel computing on a graphics processing unit. We used OpenCL, which is a cross-platform parallel programming language. Numerical experiments show that the combination of the above measures can speed up the annual daylighting simulations 101.7 times or 28.6 times when the sky vector has 146 or 2306 elements, respectively.
Date:
September 6, 2011
Creator:
Zuo, Wangda; McNeil, Andrew; Wetter, Michael & Lee, Eleanor
System:
The UNT Digital Library