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Progress on PEP-II Magnet Power Conversion System?

Description: The various power systems for supplying the PEP-II DCmagnets rely exclusively on switch mode conversion, utilizing a varietyof means depending on the requirements. All of the larger power supplies,ranging from 10 to 200 kW, are powered from DC sources utilizingrectified 480 V AC. Choppers can be used for the series connectedstrings, but for smaller groups and individual magnets, inverters drivinghigh-frequency transformers with secondary rectifiers comprise the bestapproach. All of the various … more
Date: June 1, 1996
Creator: Bellomo, P.; Genova, L.; Jackson, T. & Shimer, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Early operating and reliability experience with the CEBAF DC magnet power supplies

Description: The CEBAF accelerator is a five pass, recirculating, CW electron linear accelerator. There are a total of nine recirculation arcs connecting the two linacs. Three experimental halls are serviced by the accelerator through separate transport channels. The magnet powering system for CEBAF consists of approximately 2000 independent control channels. About 1850 of these channels are low current, trim magnet power supplies. There are 28 higher power supplies used to energize the major bending elemen… more
Date: August 1, 1996
Creator: Merz, W.; Flood, R.; Martin, E. J. & O`Sullivan, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Opening Helix on Flying Wire Emittance Measurements

Description: It has been noted for some time that after the protons are injected, when the helix is opened the proton normalized vertical emittance (as measured by the flying wires) increases by about two {pi} mm-mr. The horizontal emittance decreases by about the same amount. This has been recognized as a false result, but there has been uncertainty as to whether it was due to the flying wires not measuring the beam sigma correctly when the beam center moved at the wires or whether the effective beta at th… more
Date: April 1, 1996
Creator: Pruss, Stan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Draft of final report for the aerocapacitor TRP

Description: This report summarizes work done at LLNL for the development of the aerocapacitor in a collaborative effort between LLNL, PowerOne and PolyStor. The overall goal was to demonstrate a cost competitive manufacturing process for the use of carbon aerogels in a capacitor component suitable for incorporation in power supplies. In this report the authors feature several categories of work, including progress specifically in the areas of collaboration with their industrial partners, in the constructio… more
Date: August 23, 1996
Creator: Hair, Lucy M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Early-time turn-on characteristics of a high current thyristor

Description: Studies and experiments aimed at increasing the turn-on speed of high current thyristors have been carried out in recent years to meet an expanding need in the pulsed power handling capacity and high pulse repetition rate capability. The present tests were conducted to measure the early-time turn-on characteristics of ABB 2003-45A02 thyristors and to determine whether special triggering techniques could raise the safe turn-on rate to the 100,000 A/{micro}s range which would qualify it for appli… more
Date: July 1, 1996
Creator: Roose, L. D. & Rohwein, G. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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{open_quotes}Secure Bus{close_quotes} disturbance-free power at the utility substation level

Description: Over the last 18 months Public Service Company of New Mexico (PNM), El Camino Real Engineering, Inc. (CRE), Los Alamos National Laboratory (LANL) and Sandia National Laboratories (SNL) have worked on the development of disturbance-free power at the medium voltage substation level. The work resulted in the Secure Bus concept, a system in which a medium voltage bus in a substation is immune to power outages and voltage sags on the utility source. The Secure Bus voltage is also immune to voltage s… more
Date: December 1, 1996
Creator: Boenig, H. J. & Jones, W. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ac-dc converter firing error detection

Description: Each of the twelve Booster Main Magnet Power Supply modules consist of two three-phase, full-wave rectifier bridges in series to provide a 560 VDC maximum output. The harmonic contents of the twelve-pulse ac-dc converter output are multiples of the 60 Hz ac power input, with a predominant 720 Hz signal greater than 14 dB in magnitude above the closest harmonic components at maximum output. The 720 Hz harmonic is typically greater than 20 dB below the 500 VDC output signal under normal operation… more
Date: July 15, 1996
Creator: Gould, O.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Composite liner design to maximize the shock pressure beyond megabars

Description: Among the solid liners made of a single material which are imploded onto a target under the same driving condition, the aluminum liner produces the highest shock pressure. The authors propose the composite liner design which can increase the shock pressure several times over the best performance obtainable from an aluminum liner. They have also developed a general formulation to optimize the composite liner design for any driving current, and derived a set of very useful scaling relations. Fina… more
Date: September 1, 1996
Creator: Lee, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutron generator power supply modeling in EMMA

Description: Sandia National Laboratories has prime responsibility for neutron generator design and manufacturing, and is committed to developing predictive tools for modeling neutron generator performance. An important aspect of understanding component performance is explosively driven ferroelectric power supply modeling. EMMA (ElectroMechanical Modeling in ALEGRA) is a three dimensional compile time version of Sandia`s ALEGRA code. The code is built on top of the general ALEGRA framework for parallel shoc… more
Date: December 1, 1996
Creator: Robinson, A. C.; Farnsworth, A. V.; Montgomery, S. T.; Peery, J. S & Merewether, K. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Risk based optimization of the frequency of EDG on-line maintenance at Hope Creek

Description: This paper presents a study to optimize the frequency of on-line maintenance of the emergency diesel generators at Hope Creek. This study was directed towards identifying, analyzing, and modifying maintenance planning and scheduling practices to assure the high availability of emergency diesel generators. Input from application of a recently developed reliability model, from considerations of probabilistic safety assessment, plant-specific experience, insights from personnel involved in EDG mai… more
Date: September 1, 1996
Creator: Knoll, A.; Samanta, P. K. & Vesely, W. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Acceptance test report: Backup power system

Description: Acceptance Test Report for construction functional testing of Project W-030 Backup Power System. Project W-030 provides a ventilation upgrade for the four Aging Waste Facility tanks. Backup power includes a single 125 KW diesel generator, three 10-kva uninterruptible power supply units, and all necessary control.
Date: January 26, 1996
Creator: Cole, D.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Photovoltaic power systems and the National Electrical Code: Suggested practices

Description: This guide provides information on how the National Electrical Code (NEC) applies to photovoltaic systems. The guide is not intended to supplant or replace the NEC; it paraphrases the NEC where it pertains to photovoltaic systems and should be used with the full text of the NEC. Users of this guide should be thoroughly familiar with the NEC and know the engineering principles and hazards associated with electrical and photovoltaic power systems. The information in this guide is the best availab… more
Date: December 1, 1996
Creator: Wiles, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Environmental, health and safety issues related to commercializing CuInSe{sub 2}-based photovoltaics

Description: Photovoltaics technology is rapidly evolving towards a new generation of low-cost thin film technologies. One of the most promising materials in this new generation is copper indium selenide (CuInSe{sub 2} or CIS). As with any new material, successful commercialization of CIS photovoltaic (PV) technology will require attention to environmental, health and safety issues, including consideration of the sources, usage, and end-of-product-life disposal and/or recycling of the constituent materials.… more
Date: July 1, 1996
Creator: Eberspacher, C.; Fthenakis, V. M. & Moskowtiz, P. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Department of Energy: Photovoltaics program - FY 1996

Description: The National Photovoltaic Program supports efforts to make PV an important part of the US economy through three main program elements: Research and Development, Technology Development, and Systems Engineering and Applications. (1) Research and Development activities generate new ideas, test the latest scientific theories, and push the limits of PV efficiencies in laboratory and prototype materials and devices. (2) Technology Development activities apply laboratory innovations to products to imp… more
Date: December 31, 1996
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fermilab Recycler Ring: Technical design report. Revision 1.1

Description: This report describes the technical design of the Fermilab Recycler Ring. The purpose of the Recycler is to augment the luminosity increase anticipated from the implementation of the Fermi III upgrade project, which has as its main component the Fermilab Main Injector construction project. The Recycler is a fixed 8 GeV kinetic energy storage ring. It is located in the Main Injector tunnel directly above the Main Injector beamline, near the ceiling. The construction schedule calls for the instal… more
Date: July 1, 1996
Creator: Jackson, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Open-path millimeter-wave spectroscopy in the 225--315 GHz range

Description: This paper discusses the development of an open-path millimeter-wave (mm-wave) spectroscopy system in the 225--315 GHz atmospheric window. The new system is primarily a monostatic swept-frequency radar consisting of a mm-wave sweeper, hot-electron-bolometer or Schottky detector, and trihedral reflector. The heart of the system is a Russian backward-wave oscillator (BWO) tube that is tunable over 225--350 GHz. A mm-wave sweeper has been built with the BWO tube to sweep the entire frequency range… more
Date: October 1, 1996
Creator: Gopalsami, N.; Bakhtiari, S. & Raptis, A. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Progress towards a 20 kV, 2 kA plasma source ion implantation modulator for automotive production of diamond film on aluminum

Description: This paper provides the process requirements and the electrical design topology being developed to facilitate large scale production of amorphous diamond films on aluminum. The patented recipe, that includes other surface modification processes, requires various operational voltages, duty cycles, and current load regimes to ensure a high quality film. It is desirable to utilize a common modulator design for this relatively low voltage recipe. Processing may include target part cleaning, ion imp… more
Date: November 1, 1996
Creator: Reass, W.A.; Munson, C.A.; Malaczynski, G. & Elmoursi, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Current limiters

Description: The current that flows between the electrical test equipment and the nuclear explosive must be limited to safe levels during electrical tests conducted on nuclear explosives at the DOE Pantex facility. The safest way to limit the current is to use batteries that can provide only acceptably low current into a short circuit; unfortunately this is not always possible. When it is not possible, current limiters, along with other design features, are used to limit the current. Three types of current … more
Date: September 1, 1996
Creator: Loescher, D.H. & Noren, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Photovoltaic performance and reliability workshop

Description: This proceedings is the compilation of papers presented at the ninth PV Performance and Reliability Workshop held at the Sheraton Denver West Hotel on September 4--6, 1996. This years workshop included presentations from 25 speakers and had over 100 attendees. All of the presentations that were given are included in this proceedings. Topics of the papers included: defining service lifetime and developing models for PV module lifetime; examining and determining failure and degradation mechanisms… more
Date: October 1, 1996
Creator: Kroposki, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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GPHS-RTGs in support of the Cassini Mission. Semi annual technical progress report, 1 April 1996--29 September 1996

Description: This technical progress report discusses work on the Radioisotope Generators and Ancillary Activities for the Cassini spacecraft. The Cassini spacecraft is expected to launch in October 1997, and will explore Saturn and its moons. This progress report discusses issues in: spacecraft integration and liason, engineering support, safety, qualified unicouple fabrication, ETG fabrication and testing, ground support equipment, RTG shipping and launch support, designs, reviews and mission application.… more
Date: October 20, 1996
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An overview of the risk uncertainty assessment process for the Cassini space mission

Description: The Cassini spacecraft is a deep space probe whose mission is to explore the planet Saturn and its moons. Since the spacecraft`s electrical requirements will be supplied by radioisotope thermoelectric generators (RTGs), the spacecraft designers and mission planners must assure that potential accidents involving the spacecraft do not pose significant human risk. The Cassini risk analysis team is seeking to perform a quantitative uncertainty analysis as a part of the overall mission risk assessme… more
Date: August 1, 1996
Creator: Wyss, G.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sustainable hydrogen production

Description: This report describes the Sustainable Hydrogen Production research conducted at the Florida Solar Energy Center (FSEC) for the past year. The report presents the work done on the following four tasks: Task 1--production of hydrogen by photovoltaic-powered electrolysis; Task 2--solar photocatalytic hydrogen production from water using a dual-bed photosystem; Task 3--development of solid electrolytes for water electrolysis at intermediate temperatures; and Task 4--production of hydrogen by thermo… more
Date: January 1, 1996
Creator: Block, D. L.; Linkous, C. & Muradov, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Monthly progress report Heat Source Technology Programs, April 1995

Description: This monthly report describes activities performed in support of Cassini fueled-clad production and studies related to the use of {sup 238}PuO{sub 2} in radioisotope power systems carried out for the Office of Special Applications of the US Department of Energy (DOE) by Los Alamos National Laboratory (LANL). Most of the activities described are ongoing; the results and conclusions described may change as the work progresses.
Date: March 1, 1996
Creator: George, T.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synchronization of multiple magnetically switched modules to power linear induction adder accelerators

Description: In applications where multiple magnetic modulators are used to drive a single Linear Induction Voltage Adder (LIVA) or Linear Accelerator (LINAC), it is essential that the outputs of the modulators be synchronized. Output rise times are typically in the 10 ns to 20 ns range, often making it necessary to synchronize to within less than 1 ns. Microprocessor and electronic feedback schemes have been developed and demonstrated that achieve the required level of synchronization, however, they are so… more
Date: July 1, 1996
Creator: Reed, K.W. & Kiekel, P.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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