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29,760 Matching Results
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A 50 kV solid state multipulse kicker modulator
Performance requirements, design concepts, and test results for a prototype multipulse kicker modulator based on solid-state switches and a voltage-adding transformer topology are described. Tape-wound cores are stacked to form the transformer primary windings and a cylindrical pipe that passes through the circular inner diameters of the cores serves as the secondary winding of the step-up transformer. Boards containing MOSFET switches, trigger circuitry, and energy-storage capacitors plug into the core housings. A 50 kV prototype modulator that meets most of the facility requirements has been designed, fabricated, and tested at LLNL. More recent work has been concerned with designing and testing cores and boards with the full volt-second capability needed for 24-pulse operation. Results of the 50 kV prototype tests, preliminary tests of the full-volt-second cores and boards, and future development needs are described.
Date:
January 1, 2003
Creator:
Walstrom, P. L. (Peter L.) & Cook, E. G. (Edward G.)
Object Type:
Article
System:
The UNT Digital Library
$52 Million in Savings Identified in Equilon Assessment: Plant-Wide Assessment Summary--Petroleum (Fact Sheet)
Summary of Equilon's plant-wide assessment to identify energy and cost saving opportunities at the corporation's refinery in Martinez, California.
Date:
August 1, 2003
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
53 MHz beam loading compensation for slip stacking in the Fermilab Main Injector
Recently In-Phase and Quadrature (I&Q) was added to both the 53 MHz Feedback and Feedforward Beam Loading Compensation for Slip Stacking in the Fermilab Main Injector. With 53 MHz Feedback, we can now turn the 18 Radio Frequency (RF) Stations off down to below 100 V. In using I&Q on Feedforward, beam loading compensation to the beam on both the upper and lower frequencies of Slip Stacking can be applied as we slip the beam. I&Q theory will be discussed.
Date:
May 1, 2005
Creator:
Dey, J. & Kourbanis, I.
Object Type:
Article
System:
The UNT Digital Library
56 MHZ Cavity Prototype Measurements
N/A
Date:
January 1, 2009
Creator:
H., Hahn & Choi, E.
Object Type:
Report
System:
The UNT Digital Library
60 years of great science [Oak Ridge National Laboratory]
This issue highlights Oak Ridge National Laboratory's contributions in more than 30 areas of research and related activities during the past 60 years and provides glimpses of current activities that are carrying on this heritage.
Date:
January 1, 2003
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
71 Letters to the Commission from residents in support of Cannon AFB
Community Correspondence – 71 Letters to the Commission from residents in support of Cannon AFB
Date:
July 1, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
A 75-keV, 145-mA PROTON INJECTOR
None
Date:
July 1, 2001
Creator:
Sherman, J. D.; Figueroa, T. L. & Al, Et
Object Type:
Article
System:
The UNT Digital Library
94-1 R&D Program Annual Operating Plan
The 94-1 R&D Program focuses on developing the technical basis for stabilizing and safely storing plutonium-bearing materials. To address these issues, we have in place a material identification and stabilization project, a surveillance and monitoring project, and a management team.
Date:
September 1, 2003
Creator:
Mason, Richard E. & Dominguez, Pamela D.
Object Type:
Report
System:
The UNT Digital Library
94-1 R&D program annual operating plan: Fiscal Year 2003
The 94-1 R&D Program focuses on developing the technical basis for stabilizing and safely storing plutonium-bearing materials. To address these issues, we have in place a material identification and stabilization project, a surveillance and monitoring project, and a management team.
Date:
September 1, 2003
Creator:
Mason, Richard E. & Dominguez, Pamela D.
Object Type:
Report
System:
The UNT Digital Library
A 96 channel receiver for the ILCTA LLRF system at Fermilab
The present configuration of an ILC main LINAC RF station has 26 nine cell cavities driven from one klystron. With the addition of waveguide power coupler monitors, 96 RF signals will be down-converted and processed. A down-converter chassis is being developed that contains 12 eight channel analog modules and a single upconverter module. This chassis will first be deployed for testing a cryomodule composed of eight cavities located at New Muon Laboratory (NML) - Fermilab. Critical parts of the design for LLRF applications are identified and a detailed description of the circuit with various characteristic measurements is presented. The board is composed of an input band-pass filter centered at 1.3GHz, followed by a mixer, which down-converts the cavity probe signal to a proposed 13 MHz intermediate frequency. Cables with 8 channels per connector and good isolation between channels are being used to interconnect each down-converter module with a digital board. As mixers, amplifiers and power splitters are the most sensitive parts for noise, nonlinearities and crosstalk issues, special attention is given to these parts in the design of the LO port multiplication and distribution.
Date:
June 1, 2007
Creator:
Mavric, Uros; Chase, Brian; Branlard, Julien; Cullerton, Ed & Klepec, Dan
Object Type:
Article
System:
The UNT Digital Library
The 100,000 amp dc power supply for a staged hadron collider super ferric magnet
A 1.5 volt 100,000 amp DC switcher power supply was developed for testing a superferric magnet string at FNAL. This supply was used during testing as both the ramping supply and holding supply powering a single magnet load with a total load resistance of 0.7{micro} Ohms. The supply consists of ten paralleled switcher cells, powered by a 400 volt/600 Amp DC power supply. Each cell consists of an IGBT H-bridge driving a step-down transformer at a switching frequency of 2 kHz. The transformer has an effective turns ratio of 224:1. The secondary consists of 32 parallel single-turn full wave rectifier windings. The rectification is done with 64 Shottky diodes. Each cell is rated at 1.5 volts/10,000 amps. During this test each cell was operated as a constant power source without load current or field feedback. This paper will describe the design of the switcher cell and control system used during testing. We will also describe the next level of improvements to the current feedback system to improve the ramp control.
Date:
September 1, 2005
Creator:
Hays, Steven L.; Claypool, Bradley & Foster, G. William
Object Type:
Article
System:
The UNT Digital Library
100,000-Mile Evaluation of Transit Buses Operated on Biodiesel Blends (B20)
Evaluates the emissions, fuel economy, and maintenance of five 40-foot transit buses operated on B20 compared to four on petroleum diesel.
Date:
November 1, 2006
Creator:
Proc, K.; Barnitt, R.; Hayes, R. R.; Ratcliff, M.; McCormick, R. L.; Ha, L. et al.
Object Type:
Article
System:
The UNT Digital Library
100/300 Area Aquifer Tube Task: Annual Sampling for Fiscal Year 2006, Hanford Site, Washington
This letter report has been prepared to provide the U.S. Department of Energy, U.S. Environmental Protection Agency, Washington State Department of Ecology, and Hanford Site contractors with logistical information pertaining to the use of certain environmental monitoring sites. Although the distribution is not limited, It is not intended for general distribution beyond that audience.
Date:
November 1, 2005
Creator:
Peterson, Robert E.; Hartman, Mary J.; Raidl, Robert F. & Borghese, Jane V.
Object Type:
Report
System:
The UNT Digital Library
The 100 kA current leads for a superconducting transmission line magnet
A pair of current leads to power a transmission line magnet cooled at liquid helium temperature has been designed and developed at Fermilab. The leads designed to carry 100 kA dc current. Each lead consists of a warm end, heat exchange section and a cold end. The warm end is a half moon plate and cylinder brazed together. The heat exchange section is made of 202 copper rods arranged in a staggered pattern. Each rod is 6.35 mm in diameter and 1650 mm in length. The rods were soft-soldered into 12.7 mm deep holes at both warm and cold ends. The helium gas flow, guided by anodized aluminum baffles along the lead length, allows for a relatively high heat transfer coefficient between the current carrying rods and cooling helium gas. As a result the current leads were successfully tested with a ramping current of up to 104 kA. The current lead design, assembly work and the test results are presented.
Date:
September 1, 2005
Creator:
Huang, Yuenian; Foster, William; Kim, Seog-Whan; Mazur, Peter; Oleck, Andrew; Piekarz, Henryk et al.
Object Type:
Article
System:
The UNT Digital Library
100-N Area Strontium-90 Treatability Demonstration Project: Food Chain Transfer Studies for Phytoremediation Along the 100-N Columbia River Riparian Zone
Strontium-90 (90Sr) exceeds the U.S. Environmental Protection Agency’s drinking water standards for groundwater (8 picocuries/L) by as much as a factor of 1000 at several locations within the Hanford 100-N Area and along the 100-N Area Columbia River shoreline). Phytoextraction, a managed remediation technology in which plants or integrated plant/rhizosphere systems are employed to phytoextract and/or sequester 90Sr, is being considered as a potential remediation system along the riparian zone of the Columbia River as part of a treatment train that includes an apatite barrier to immobilize groundwater transport of 90Sr. Phytoextraction would employ coyote willow (Salix exigua) to extract 90Sr from the vadose zone soil and aquifer sediments (phytoextraction) and filter 90Sr (rhizofiltration) from the shallow groundwater along the riparian zone of the Columbia River. The stem and foliage of coyote willows accumulating 90Sr may present not only a mechanism to remove the contaminant but also can be viewed as a source of nutrition for natural herbivores, therefore becoming a potential pathway for the isotope to enter the riparian food chain. Engineered barriers such as large and small animal fencing constructed around the field plot will control the intrusion of deer, rodents, birds, and humans. These efforts, however, will …
Date:
April 1, 2009
Creator:
Fellows, Robert J.; Fruchter, Jonathan S. & Driver, Crystal J.
Object Type:
Report
System:
The UNT Digital Library
103-06A - A1 - DOD Input - Army - Fort Monroe - VA
DOD Input - Army - Fort Monroe - VA - Includes: Memorandum for Army in reference to the issues/concerns/questions on Fort Monroe and slides from the Ft. Monroe base visit
Date:
July 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Text
System:
The UNT Digital Library
103-06A-A20 - Base Input - Army - Red River Army Depot - Red River Army Depot informational briefing
Red River Army Depot informational briefing given by depot commander COL Gary Carney and Munitions Center Director Harrell Hignight on 06/21/05.
Date:
July 1, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
103-06A - A20 - Base Input - Army - Red River Army Depot - TX
Base Input - Army - Red River Army Depot - TX - Includes: PowerPoint Presentation Tab 1 is the presentation with data up to 053105. Tab 2 is the presentation with data up to 063005
Date:
July 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Text
System:
The UNT Digital Library
103-06A - A20 - Base Input - Army - Red River Army Depot TX - Red River Defense Complex Community Briefings
Red River Defense Complex Community Briefings presented to Commissioners Hill and Turner on 06/21/05.
Date:
July 1, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
103-06A - A20 - BRAC Commission 06/21/05 Base Visit Book for Red River Army Depot
BRAC Commission 06/21/05 Base Visit Book for Red River Army Depot.
Date:
July 1, 2005
Creator:
unknown
Object Type:
Book
System:
The UNT Digital Library
103-06A - A6 - Base Input - Army - Rock Island Arsenal - IL
Base Input - Army - Rock Island Arsenal - IL - Includes: Itinerary for the visit of Mr. Samuel K. Skinner; List of attendees; PowerPoint presentation of BRAC Recommendations and Possible Changes prepared by Mr. Alan Wilson, Garrison Manager; and Rock Island Arsenal brochure.
Date:
July 1, 2005
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
103-06A -A6 - Base Input Army - Rock Island Arsenal - IL
Base Input - Army - Rock Island Arsenal - IL - Includes: PowerPoint Presentation from John Guzzonato Director, DFAS Rock Island
Date:
July 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Text
System:
The UNT Digital Library
103-06A - A6 - Base Input - Army - Rock Island Arsenal IL - Mr. Samuel K. Skinner - US Army Garrison - Rock Island Arsenal - Installation Overview Briefing
Base Input - Army - Rock Island Arsenal IL - Mr. Samuel K. Skinner - US Army Garrison - Rock Island Arsenal - Installation Overview Briefing - PowerPoint Presentation made by Mr. Alan Wilson, Garrison Manager
Date:
July 1, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
103-06A-AF20 - Base Input - Air Force - Elmendorf Air Force Base/Kulis Air Guard Station/Eielson Air Force Base - AK
Base Input - Air Force - Elmendorf Air Force Base/Kulis Air Guard Station/Eielson Air Force Base - AK - Mr. Small BRAC Commission Visit - Includes: Powerpoint presentation from Lt. Col Pat McCrea; Eielson Air Force Base ALASKA Home of the Iceman Team Powerpoint Presentation; Welcome to the 176th Wing Kulis Air National Guard Base Alaska Report; biographies; Welcome to the 176th Wing Presentation
Date:
July 1, 2005
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library