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Heavy mass states

Description: The indirect evidence for the production of a heavy lepton and direct evidence for the product of a new hadronic state or states in proton-proton interactions is considered for the interpretation requiring the existence of two more leptons and two new quarks. It is shown that such a picture is consistent and in good agreement with existing data. The new structure is located at M = 9.54 GeV/c/sup 2/ and is much wider than the experimental resolution. Also it is asymmetric, suggesting the presenc… more
Date: August 23, 1977
Creator: Paschos, E. A.
Partner: UNT Libraries Government Documents Department
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Potential of pyroprocessing for partitioning purex wastes

Description: The processes are extremely compact. The process reagents are highly resistant to radiation damage and, therefore, can be used to handle short-cooled, highly concentrated waste with negligible degradation. Most reagents can be recycled back through the process many times, thereby minimizing the generation of waste products, and also reducing the process cost. Fission-product wastes are discharged from the process as concentrated, solid wastes, typically in a metal matrix suitable for permanent … more
Date: July 23, 1980
Creator: Coops, M. S. & Sisson, D. H.
Partner: UNT Libraries Government Documents Department
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Personal extrapolation of CDF test beam use to the SSC

Description: The author's personal experience in test beam usage at CDF is used to predict SSC needs at the point of turn-on. It is concluded that the test beam demand will reflect the scale of effort involved in SSC detectors rather than the total number of them. Provision for later expansion is recommended. It is also recommended that the test beam facilities, as well as detector electronics, should reflect the available dynamic range; particularly, a single high energy beam derived from the SSC could be … more
Date: June 23, 1986
Creator: Nodulman, L.
Partner: UNT Libraries Government Documents Department
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Engineering problems of future neutral beam injectors

Description: Because there is no limit to the energy or power that can be delivered by a neutral-beam injector, its use will be restricted by either its cost, size, or reliability. Studies show that these factors can be improved by the injector design, and several examples, taken from mirror reactor studies, are given.
Date: November 23, 1977
Creator: Fink, J.
Partner: UNT Libraries Government Documents Department
open access

Photomultiplier characteristics considerations for the deep underwater muon and neutrino detection system

Description: The results of an investigation of the characteristics of photomultipliers for the Deep Underwater Muon and Neutrino Detection (DUMAND) System are discussed. The pulse-height resolution, the afterpulsing phenomena and the gain sensitivity to the ambient magnetic field have been determined for large photocathode area photomultipliers. Furthermore, the transient time difference, the single photoelectron time spread, and the collection and photocathode quantum efficiency uniformity as a function o… more
Date: February 23, 1980
Creator: Leskovar, B.
Partner: UNT Libraries Government Documents Department
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Cosmic ray events in Soudan 2

Description: The Soudan 2 detector is located at a depth of 2090 meters-water equivalent (mwe). About 2 million muon events have been recorded. Here we report on our plans to analyze them for comparison with expectations from atmospheric cosmic ray models. Plans and capabilities to analyze multiple muons and monopoles are also discussed. 3 refs., 5 figs.
Date: August 23, 1989
Creator: Allison, W. W. M.; Alner, G. J.; Ambats, I.; Ayres, D.; Balka, L.; Barr, G. D. et al.
Partner: UNT Libraries Government Documents Department
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40-kV, 25-ms neutral-beam power supply for TMX

Description: Modifications are described to upgrade the neutral-beam power supply for the TMX from 40 kV, 10 ms to 40 kV, 25 ms. The redesign of the accel and suppressor power supplies to achieve separation of the high-voltage and control sections, operation of the arc pulse lines in series, operation of the arc pulse lines in a noisy environment with SCR trigger and crowbar, and modifications to the electrolytic storage banks are discussed.
Date: September 23, 1977
Creator: Leavitt, G.A.
Partner: UNT Libraries Government Documents Department
open access

Nuclear design of fast hybrid blankets

Description: The objective of this presentation is to: (1) present the physical motivation for fusion-fission hybrids, (2) outline design considerations for hybrid blankets, and (3) discuss the nuclear performance potential of hybrid blankets.
Date: January 23, 1978
Creator: Lee, J. D.
Partner: UNT Libraries Government Documents Department
open access

Studies of. mu. prime s underground with the Soudan 2 Tracker

Description: During the period July 1987 through March 1988, a section of the Soudan 2 active shield known as the Tracker' recorded {approximately}250,000 muon tracks. The detector is located in the Tower-Soudan State Park in Soudan, Minnesota USA at a depth of 2090 meters-water equivalent. We have analysed the data collected and searched for time-dependent astronomical sources. Distributions in azimuthal and zenith angles as well as declination and right ascension are shown. 1 ref., 7 figs., 1 tab.
Date: August 23, 1989
Creator: Kochocki, J.; Benjamin, D.; Ewen, B.; Kafka, T.; Mann, A.; McMaster, L. et al.
Partner: UNT Libraries Government Documents Department
open access

Heat transfer in inertial confinement fusion reactor systems

Description: The short time and deposition distance for the energy from inertial fusion products results in local peak power densities on the order of 10/sup 18/ watts/m/sup 3/. This paper presents an overview of the various inertial fusion reactor designs which attempt to reduce these peak power intensities and describes the heat transfer considerations for each design.
Date: April 23, 1980
Creator: Hovingh, J.
Partner: UNT Libraries Government Documents Department
open access

Heat transfer research and power cycle transient modeling

Description: Fine axial flutes enhance heat transfer in vertical shell-and-tube exchangers with water inside the tubes and ammonia evaporating or condensing in layer flow on the shell side. Single-tube experiments with R-11 and ammonia indicate local shell-side coefficients 3 to 5 times those for corresponding smooth tubes. Single-tube experiments with water indicate that at moderate velocities the tube-side coefficients are enhanced by a factor equal to the ratio of fluted-to-smooth surface areas while the… more
Date: March 23, 1977
Creator: Rothfus, R.R. & Neuman, C.P.
Partner: UNT Libraries Government Documents Department
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Tandem mirror reactors with thermal barriers

Description: Preliminary calculations of Q and magnet designs are presented for three different versions of tandem mirror reactors (TMR) using thermal barriers to enhance plug potentials by auxiliary electron heating. These three versions, called A-cell-barrier TMR, axisymmetric-barrier TMR, and inside-barrier TMR, exhibit reduced plug density (n/sub p/ << 10/sup 19/ m/sup -3/) and less required magnetic mirror field (B/sub mirror approx. = 9 T) compared to TMR designs without thermal barriers. A-cell barri… more
Date: May 23, 1980
Creator: Logan, B. G.; Arfin, B. & Barr, W. L.
Partner: UNT Libraries Government Documents Department
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Evaluation of low activation vanadium alloys for structural material in a fusion reactor

Description: The V-7.2Cr-14.5Ti, V-9.2Cr-4.9Ti, V-9.9Cr-9.2Ti, V-13.5Cr-5.2Ti, V-4.1Cr-4.3Ti, Vanstar-7, V-4.6Ti, V-17.7Ti, and V-3.1Ti-(0.5-1.0)Si alloys were evaluated for use as structural material in a fusion reactor. The alloys were evaluated on the basis of their yield strength, swelling resistance, resistance to hydrogen and irradiation embrittlement, and compatibility with a lithium reactor coolant. On the basis of these evaluations, the V-7.2Cr-14.5Ti, V-9.2Cr-4.9Ti, V-9.9Cr-9.2Ti, V-13.5Cr-5.2Ti, … more
Date: October 23, 1989
Creator: Loomis, B. A.; Hull, A. B. & Smith, D. L.
Partner: UNT Libraries Government Documents Department
open access

Vacuum technology issues for the SSC (Superconducting Super Collider)

Description: The Superconducting Super Collider, to be built in Texas, will provide an energy of 40 TeV from colliding proton beams. This energy is twenty times higher than currently available from the only other cryogenic collider, the Fermilab Tevatron, and will allow experiments that can lead to a better understanding of the fundamental properties of matter. The energy scale and the size of the new machine pose intriguing challenges and opportunities for the its vacuum systems. The discussion will includ… more
Date: October 23, 1989
Creator: Joestlein, H.
Partner: UNT Libraries Government Documents Department
open access

Contained Events in Soudan 2

Description: A search for contained events in the Soudan 2 nucleon decay detector has been made for the initial exposure of the first quarter of the 1.1 kiloton detector. This corresponds to an exposure of 0.083 kiloton years in the fiducial volume. We observe 5 {nu}{sub mu} candidate events and 5 {nu}{sub e} candidate events. Results of Monte Carlo simulations of neutrino events and proton decay events in Soudan 2 are compared. 6 refs., 3 figs.
Date: August 23, 1989
Creator: Allison, W. W. M.; Alner, G. J.; Ambats, I.; Balka, L.; Barr, G. D.; Benjamin, D. et al.
Partner: UNT Libraries Government Documents Department
open access

Characterizing W-2 SLSF experiment temperature oscillations using computer graphics. [Sodium Loop Safety Facility]

Description: The W-2 SLSF (Sodium Loop Safety Facility) experiment was an instrumented in-reactor test performed to characterize the failure response of full-length, preconditioned LMFBR prototypic fuel pins to slow transient overpower (TOP) conditions. Although the test results were expected to confirm analytical predictions of upper level failure and fuel expulsion, an axial midplane failure was experienced. Extensive post-test analyses were conducted to understand all of the unexpected behavior in the ex… more
Date: June 23, 1983
Creator: Smith, D. E.
Partner: UNT Libraries Government Documents Department
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Evolution of Primary Hemostasis in Early Vertebrates

Description: Article on the evolution of primary hemostasis in early vertebrates.
Date: December 23, 2009
Creator: Kim, Seongcheol; Carrillo, Maira; Kulkarni, Vrinda & Jagadeeswaran, Pudur
Partner: UNT College of Arts and Sciences
open access

Brittle and Ductile Behavior in Carbon Nanotubes

Description: Article discussing research on the response of carbon nanotubes to a tensile load.
Date: November 23, 1998
Creator: Buongiorno Nardelli, Marco; Yakobson, Boris I. & Bernholc, Jerry
Partner: UNT College of Arts and Sciences
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Dissociation of Water on Defective Carbon Substrates

Description: Article on the dissociation of water on defective carbon substrates.
Date: September 23, 2005
Creator: Kostov, Milen; Santiso, Erik; George, A. M.; Gubbins, Keith E. & Buongiorno Nardelli, Marco
Partner: UNT College of Arts and Sciences
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Quantum Irreversibility and Chaos [Phys. Rev. Lett. 67, 2593 (1991)]

Description: Corrections to an equation printed with a typographical error in Quantum Irreversibility and Chaos, Physical Review Letters 67, 2593 (1991).
Date: December 23, 1991
Creator: Bonci, Luca; Roncaglia, Roberto; West, Bruce J. & Grigolini, Paolo
Partner: UNT College of Arts and Sciences
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Mn Interstitial Diffusion in (Ga, Mn)As

Description: This article describes a combined theoretical and experimental study of the ferromagnetic semiconductor (Ga, Mn)As which explains the remarkably lard changes observed on low-temperature annealing.
Date: January 23, 2004
Creator: Edmonds, Kevin; Boguslawski, Piotr; Wang, K. Y.; Campion, Richard Paul; Novikov, Sergei; Farley, N. R. S. et al.
Partner: UNT College of Arts and Sciences
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