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Advances in metal ion sources

Description: Beams of metallic ion species can be produced by the ECR (electron cyclotron resonance) ion source and by the MEVVA (metal vapor vacuum arc) ion source. Although the ECR source is fundamentally a gaseous ion source, metal ion beams can be produced by introducing metallic feed material into the plasma discharge using a number of techniques. The ion charge states can be very high, which is a significant advantage to most applications. The MEVVA ion source, on the other hand, is specifically a met… more
Date: May 1, 1988
Creator: Brown, I.G.
Item Type: Refine your search to only Article
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Algorithms for the self-consistent simulation of high power klystrons

Description: We discuss an improvement to the algorithm developed by Yu for modelling rf cavities in klystrons using the port approximation. In this method, the cavity is simulated by imposing an rf voltage as a boundary condition across the outer wall. The voltage and phase are chosen to be consistent with the cavity impedence and with the rf current induced by the electron beam. In the original method, each cavity was calculated successively using either linear theory or an iterative method to achieve a s… more
Date: May 1, 1988
Creator: Eppley, K.
Item Type: Refine your search to only Article
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Analytical Chemistry Division annual progress report for period ending December 31, 1988

Description: The Analytical Chemistry Division of Oak Ridge National Laboratory (ORNL) is a large and diversified organization. As such, it serves a multitude of functions for a clientele that exists both in and outside of ORNL. These functions fall into the following general categories: (1) Analytical Research, Development, and Implementation. The division maintains a program to conceptualize, investigate, develop, assess, improve, and implement advanced technology for chemical and physicochemical measurem… more
Date: May 1, 1988
Item Type: Refine your search to only Report
open access

Annex to 7-GeV Advanced Photon Source : Conceptual Design Report

Description: The Annex to the 7-GeV Advanced Photon Source Conceptual Design Report updates the Conceptual Design Report of 1987 (CDR-87) to include the results of further optimization and changes of the design during the past year. The design changes can be summarized as affecting three areas: the accelerator system, conventional facilities, and experimental systems. Most of the changes in the accelerator system result from inclusion of a positron accumulator ring (PAR), which was added at the suggestion o… more
Date: May 1988
Creator: Argonne National Laboratory
Item Type: Refine your search to only Report
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Annex to 7-GeV Advanced Photon Source Conceptual Design Report

Description: The Annex to the 7-GeV Advanced Photon Source Conceptual Design Report updates the Conceptual Design Report of 1987 (CDR-87) to include the results of further optimization and changes of the design during the past year. The design changes can be summarized as affecting three areas: the accelerator system, conventional facilities, and experimental systems. Most of the changes in the accelerator system result from inclusion of a positron accumulator ring (PAR), which was added at the suggestion o… more
Date: May 1, 1988
Item Type: Refine your search to only Report
open access

An annotated bibliography of completed and in-progress behavioral research for the Office of Buildings and Community Systems. [About 1000 items, usually with abstracts]

Description: This report provides an annotated bibliography of completed and in-progress consumer decision research useful for technology transfer and commercialization planning by the US Department of Energy's (DOE) Office of Buildings and Community Systems (OBCS). This report attempts to integrate the consumer research studies conducted across several public and private organizations over the last four to five years. Some of the sources of studies included in this annotated bibliography are DOE National L… more
Date: May 1988
Creator: Weijo, R. O.; Roberson, B. F.; Eckert, R. & Anderson, M. R.
Item Type: Refine your search to only Report
open access

Annual Technical Report

Description: Report of Argonne Chemical Technology division activities, including high-performance batteries, aqueous batteries, advanced fuel cells, and coal utilization.
Date: May 1988
Creator: Argonne National Laboratory. Chemical Technology Division.
Item Type: Refine your search to only Report
open access

The APS beam transfer line from linac to booster synchrotron

Description: In this note, the authors describe the recently designed APS beam transport system to the booster synchrotron. Another transfer system which guides the beam from the booster to the storage ring is described and therefore it will not be treated here. The system of interest consists of two parts; the transfer line LTOA from the injector linac to the positron accumulator ring (PAR) and the transfer line ATOB from the accumulator ring to booster synchrotron. For the design, they assumed that the rm… more
Date: May 1, 1988
Creator: Yoon, M. & Crosbie, E.
Item Type: Refine your search to only Report
open access

Atmospheric and Geophysical Sciences Division: Program report, FY 1987

Description: In 1988 the Atmospheric and Geophysical Sciences Division began its 15th year as a division. As the Division has grown over the years, its modeling capabilities have expanded to include a broad range of time and space scales ranging from hours to years, and from kilometers to global, respectively. For this report, we have chosen to show a subset of results from several projects to illustrate the breadth, depth, and diversity of the modeling activities that are a major part of the Division's res… more
Date: May 1, 1988
Item Type: Refine your search to only Report
open access

Augmented Fish Health Monitoring in Oregon, 1987-1988 Annual Report.

Description: Diminished natural fish production in the Columbia River Basin has prompted increased artificial propagation to compensate both for losses of anadromous salmonids related to hydroelectric facilities and for other causes. The health and quality of artificially propagated smolts probably is a major influence on survival. Smolt survival varies greatly from one location to another, among different species and from one year to the next. Fish health monitoring is necessary to identify cause of mortal… more
Date: May 1, 1988
Creator: Bauer, Jerry
Item Type: Refine your search to only Report
open access

B Meson Reconstruction and Lifetime Studies With the Mark II at PEP

Description: We have measured the lifetime of an ensemble of particles containing b quarks, tagged with a high p/sub T/ lepton from their semileptonic decay. Using a method which estimates the production point of each particle in the beam ellipse, we measured a lifetime of 0.98 +- 0.12 +- 0.13 psec. We have also studied methods of partially reconstructing B mesons decaying into D/sup/star//minus// mesons plus charged leptons or mesons. We have searched the Mark II PEP data samples and find five candidates f… more
Date: May 1, 1988
Creator: Wagner, S. R.
Item Type: Refine your search to only Article
open access

Background radiation from fission pulses

Description: Extensive source terms for beta, gamma, and neutrons following fission pulses are presented in various tabular and graphical forms. Neutron results from a wide range of fissioning nuclides (42) are examined and detailed information is provided for four fuels: /sup 235/U, /sup 238/U, /sup 232/Th, and /sup 239/Pu; these bracket the range of the delayed spectra. Results at several cooling (decay) times are presented. For ..beta../sup -/ and ..gamma.. spectra, only /sup 235/U and /sup 239/Pu result… more
Date: May 1, 1988
Creator: England, T. R.; Arthur, E. D.; Brady, M. C. & LaBauve, R. J.
Item Type: Refine your search to only Report
open access

Beam impedances of position monitors, bellows, and abort kicker

Description: The miscellaneous components of an accelerator may contribute a substantial or even dominant part of the interaction between beam and surroundings. We have estimated the beam impedances of a few of these components. When needed, we have added our own conceptions to the descriptions available at the Workshop on the RHIC Performance in order to make definite the calculations of impedance. These assumed parameters, while not unique, hopefully illustrate feasible and typical designs. 8 refs., 4 fig… more
Date: May 1, 1988
Creator: Lambertson, G. R. & Ng, K.-Y.
Item Type: Refine your search to only Article
open access

Book preservation technologies

Description: This assessment analyzes the problem of acid deterioration of books and the program underway at the Library of Congress. The program at the Library involves the chemical treatment of books in a unique and effective process that, however, also presents some new engineering and safety concerns. Because of these concerns, the House of Representatives Committee on Appropriations requested this independent review of the Library’s system and other available or potential processes.
Date: May 1988
Creator: United States. Congress. Office of Technology Assessment.
Item Type: Refine your search to only Report
open access

Bootstrap currents in radio-frequency-driven tokamak equilibria

Description: Interest in the bootstrap current arising from neoclassical transport in tokamaks has increased recently in view of certain experimental observations. In this study, the bootstrap current is calculated for a number of rf current-driven tokamaks. Two-dimensional, self-consistent, steady-state tokamak MHD equilibria are obtained by including both the transport-driven bootstrap current and the externally driven rf current. The self-consistency is acomplished by iterating between two-dimensional MH… more
Date: May 1, 1988
Creator: Hsiao, Ming-Yuan; Ehst, D.A. & Evans, K., Jr.
Item Type: Refine your search to only Report
open access

Braze alloy development for zircaloy

Description: The purpose of this study was to find a suitable braze alloy to close the ends of a new fuel design for N Reactor, the defense reactor at the Hanford site, Washington. An alloy composed of Zircaloy-2 + 8 wt % chromium + 8 wt % nickel (Zr2-8Cr-8Ni) was successfully used to obtain an acceptable joint with no voids. Suggestions for future work on end closure development for the new fuel are outlined. This alloy has potential use in any Zircaloy joining applications. 3 refs., 9 figs., 3 tabs.
Date: May 1, 1988
Creator: Donovan, A.H.
Item Type: Refine your search to only Report
open access

Bunch length and impedance measurements in SPEAR

Description: Subsequent to an extensive smoothing of the vacuum chamber a comprehensive study of the SPEAR impedance was undertaken. Bunch length, synchrotron quadrupole mode frequency, and parasitic mode loss were measured as functions of beam current. The results showed that, although the gross longitudinal impedance had indeed been reduced, the 'capacitive' component had also decreased relative to the 'inductive'--to the extent that previously compensated potential well distortion now induced bunch lengt… more
Date: May 1, 1988
Creator: Bane, K.; Donald, M.; Hofmann, A.; Jowett, J.; Lockman, W.; Morton, P. et al.
Item Type: Refine your search to only Article
open access

Bunch lengthening in the SLC damping ring

Description: In this paper we present the results of measurements of bunch length and bunch shape as a function of current in the SLC e/sup /minus//damping ring. After extraction, the SLC bunch is compressed by means of an RF compressor and a subsequent high dispersion section. By inserting a video screen at a point of large dispersion and by using the correlation between bunch length and energy spread induced by the compressor, we have measured not only the bunch length but also the longitudinal charge dis… more
Date: May 1, 1988
Creator: Rivkin, L.; Bane, K.; Chen, P.; Gabella, W.; Higo, T.; Hofmann, A. et al.
Item Type: Refine your search to only Article
open access

The calculated longitudinal impedance of the SLC (Stanford Linear Collider) damping rings

Description: A high level of current dependent bunch lengthening has been observed in the north damping ring of the Stanford Linear Collider (SLC), indicating that the ring's impedance is very inductive. This level of bunch lengthening will limit the performance of the SLC. In order to study the problem of bunch lengthening in the damping ring and the possibility of reducing their inductance we compute, in this report, the longitudinal impedance of the damping ring vacuum chamber. More specifically we find … more
Date: May 1, 1988
Creator: Bane, K.L.F.
Item Type: Refine your search to only Article
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Calculation of higher order modes in the RHIC 27 MHz rf cavity

Description: The URMEL code was used to calculate the frequencies, quality factors, and shunt impedances of the lowest modes of the proposed RHIC accelerating cavity. These values can be used as input for the calculation of the longitudinal and transverse coupled-bunch instabilities. The cavity dimensions were taken from the RHIC conceptual design report.
Date: May 1, 1988
Creator: Schoessow, P.
Item Type: Refine your search to only Article
open access

Calculation of oxygen diffusion in plutonium oxide films during the high-temperature oxidation of plutonium-1 weight percent gallium in 500 torr of air

Description: Oxygen self-diffusion in PuO/sub 1.995/ was calculated from rate constants obtained for the parabolic oxidation of the Pu-1 wt % Ga alloy in 500-torr dry air between 250 and 480/degree/C. The activation energy for oxygen vacancy diffusion in the n-type PuO/sub 2-x/ is 22.6 kcal/mole. Results from this investigation are compared with other reported results, and possible explanation for the difference in results is discussed. 21 refs., 5 figs., 1 tab.
Date: May 27, 1988
Creator: Stakebake, J. L.
Item Type: Refine your search to only Report
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