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9,879 Matching Results
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Beam-Beam Scans Within a Linear Collider Bunch-Train Crossing
Beam-beam deflection scans provide important beam diagnostics at the interaction point of a linear collider. Beam properties such as spot sizes, alignment, and waists are measured by sweeping one beam across the other. Proposed linear colliders use trains of bunches; if beam-beam scans can be done within the time of a bunch-train crossing rather than integrating over the bunch train, the acquisition rate of diagnostic information can be increased and the sensitivity of the scan to pulse-to-pulse jitter and slow drifts reduced. The existence of intra-train deflection feedback provides most of the hardware needed to implement intra-train beam-beam scans for diagnostic purposes. A conceptual design is presented for such beam-beam scans at the Next Linear Collider (NLC).
Date:
February 22, 2006
Creator:
Smith, S. R.
Object Type:
Article
System:
The UNT Digital Library
ESTIMATING RISK TO CALIFORNIA ENERGY INFRASTRUCTURE FROM PROJECTED CLIMATE CHANGE
This report outlines the results of a study of the impact of climate change on the energy infrastructure of California and the San Francisco Bay region, including impacts on power plant generation; transmission line and substation capacity during heat spells; wildfires near transmission lines; sea level encroachment upon power plants, substations, and natural gas facilities; and peak electrical demand. Some end-of-century impacts were projected:Expected warming will decrease gas-fired generator efficiency. The maximum statewide coincident loss is projected at 10.3 gigawatts (with current power plant infrastructure and population), an increase of 6.2 percent over current temperature-induced losses. By the end of the century, electricity demand for almost all summer days is expected to exceed the current ninetieth percentile per-capita peak load. As much as 21 percent growth is expected in ninetieth percentile peak demand (per-capita, exclusive of population growth). When generator losses are included in the demand, the ninetieth percentile peaks may increase up to 25 percent. As the climate warms, California's peak supply capacity will need to grow faster than the population.Substation capacity is projected to decrease an average of 2.7 percent. A 5C (9F) air temperature increase (the average increase predicted for hot days in August) will diminish the …
Date:
June 22, 2011
Creator:
Sathaye, Jayant; Dale, Larry; Larsen, Peter; Fitts, Gary; Koy, Kevin; Lewis, Sarah et al.
Object Type:
Report
System:
The UNT Digital Library
Temperatures and Thermal Stresses in Hexagonal Tubes and Pierced Plates With Internal Heat Sources
From abstract: "Steady temperatures and thermal stresses are determined for long hexagonal tubes having round holes for the case of uniform internal heat generation and a fluid-cooled inside surface. Thermal stresses are also determined for thick plates pierced by holes on an equilateral triangular pattern and for hexagonal tubes having a hexagonal hole with rounded inside corners. Stresses in the end regions of tubes are also investigated."
Date:
September 22, 1959
Creator:
Meuser, Robert B.
Object Type:
Report
System:
The UNT Digital Library
A three-dimensional numerical model of predevelopment conditions in the Death Valley regional ground-water flow system, Nevada and California
In the early 1990's, two numerical models of the Death Valley regional ground-water flow system were developed by the U.S. Department of Energy. In general, the two models were based on the same basic hydrogeologic data set. In 1998, the U.S. Department of Energy requested that the U.S. Geological Survey develop and maintain a ground-water flow model of the Death Valley region in support of U.S. Department of Energy programs at the Nevada Test Site. The purpose of developing this ''second-generation'' regional model was to enhance the knowledge and understanding of the ground-water flow system as new information and tools are developed. The U.S. Geological Survey also was encouraged by the U.S. Department of Energy to cooperate to the fullest extent with other Federal, State, and local entities in the region to take advantage of the benefits of their knowledge and expertise. The short-term objective of the Death Valley regional ground-water flow system project was to develop a steady-stat e representation of the predevelopment conditions of the ground-water flow system utilizing the two geologic interpretations used to develop the previous numerical models. The long-term objective of this project was to construct and calibrate a transient model that simulates the ground-water …
Date:
November 22, 2002
Creator:
D'Agnese, F. A.; O'Brien, G. M.; Faunt, C. C.; Belcher, W. R. & San Juan, Carma
Object Type:
Report
System:
The UNT Digital Library
Webinar 4: Accessing and Using Oral History
Video recording of the fourth webinar from the Oral History Forum. The theme of the last webinar of the series explores innovative uses of oral history collections and pushes for equitable access to oral history collections.
Date:
February 22, 2023
Creator:
Marcus, Eric; Sullivan, Sady & Sielaff, Steven
Object Type:
Video
System:
The UNT Digital Library
2006 Long Range Development Plan Final Environmental Impact Report
This environmental impact report (EIR) has been prepared pursuant to the applicable provisions of the California Environmental Quality Act (CEQA) and its implementing guidelines (CEQA Guidelines), and the Amended University of California Procedures for Implementation of the California Environmental Quality Act (UC CEQA Procedures). The University of California (UC or the University) is the lead agency for this EIR, which examines the overall effects of implementation of the proposed 2006 Long Range Development Plan (LRDP; also referred to herein as the 'project' for purposes of CEQA) for Lawrence Berkeley National Laboratory (LBNL; also referred to as 'Berkeley Lab,' 'the Laboratory,' or 'the Lab' in this document). An LRDP is a land use plan that guides overall development of a site. The Lab serves as a special research campus operated by the University employees, but it is owned and financed by the federal government and as such it is distinct from the UC-owned Berkeley Campus. As a campus operated by the University of California, the Laboratory is required to prepare an EIR for an LRDP when one is prepared or updated pursuant to Public Resources Code Section 21080.09. The adoption of an LRDP does not constitute a commitment to, or final …
Date:
January 22, 2007
Creator:
Philliber, Jeff
Object Type:
Report
System:
The UNT Digital Library
Hoopa Valley Small Scale Hydroelectric Feasibility Project
This study considered assessing the feasibility of developing small scale hydro-electric power from seven major tributaries within the Hoopa Valley Indian Reservation of Northern California (http://www.hoopa-nsn.gov/). This study pursued the assessment of seven major tributaries of the Reservation that flow into the Trinity River. The feasibility of hydropower on the Hoopa Valley Indian Reservation has real potential for development and many alternative options for project locations, designs, operations and financing. In order to realize this opportunity further will require at least 2-3 years of intense data collection focusing on stream flow measurements at multiple locations in order to quantify real power potential. This also includes on the ground stream gradient surveys, road access planning and grid connectivity to PG&E for sale of electricity. Imperative to this effort is the need for negotiations between the Hoopa Tribal Council and PG&E to take place in order to finalize the power rate the Tribe will receive through any wholesale agreement that utilizes the alternative energy generated on the Reservation.
Date:
March 22, 2009
Creator:
Miller, Curtis
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with Donald O. Dencker, September 22, 2001
The National Museum of the Pacific War presents an oral interview with Donald O. Dencker. He was born in Minneapolis, Minnesota, November 25, 1924. Upon graduation from high school in February, 1943 he joined the Army. In March 1944 after attending Army Corps of Engineers school, he was assigned to the 96th Infantry Division. He witnessed the explosion of a munition ship in Port Chicago, California. Eventually he departed Pearl Harbor embarked upon USS LST-745 sailing to Leyte Island in the Philippines. He recalls several anecdotes during the transit and landing on Leyte Island in October, 1944. He recalls gunfire support from a destroyer that was off target, resulting in six casualties from white phosphorus as well as a Japanese suicide attack on his company that resulted in 75 enemy killed. His unit was then sent to Okinawa on April 1, 1945. He remembers that his 3rd Battalion had so many casualties that it was relieved and sent to guard Kadena Airfield. He recounts the many nights of shelling at the airfield followed by assaults on Japanese positions in which he lost four company commanders and many of his fellow soldiers, including several close friends. His company had sustained over …
Date:
September 22, 2001
Creator:
Dencker, Donald O.
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Donald O. Dencker, September 22, 2001
The National Museum of the Pacific War presents an oral interview with Donald O. Dencker. He was born in Minneapolis, Minnesota, November 25, 1924. Upon graduation from high school in February, 1943 he joined the Army. In March 1944 after attending Army Corps of Engineers school, he was assigned to the 96th Infantry Division. He witnessed the explosion of a munition ship in Port Chicago, California. Eventually he departed Pearl Harbor embarked upon USS LST-745 sailing to Leyte Island in the Philippines. He recalls several anecdotes during the transit and landing on Leyte Island in October, 1944. He recalls gunfire support from a destroyer that was off target, resulting in six casualties from white phosphorus as well as a Japanese suicide attack on his company that resulted in 75 enemy killed. His unit was then sent to Okinawa on April 1, 1945. He remembers that his 3rd Battalion had so many casualties that it was relieved and sent to guard Kadena Airfield. He recounts the many nights of shelling at the airfield followed by assaults on Japanese positions in which he lost four company commanders and many of his fellow soldiers, including several close friends. His company had sustained over …
Date:
September 22, 2001
Creator:
Dencker, Donald O.
Object Type:
Sound
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 38, No. 239, Ed. 1 Friday, June 22, 2007
Free weekly newspaper that includes business and classified advertising.
Date:
June 22, 2007
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 40, No. 191, Ed. 1 Friday, May 22, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
May 22, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 37, No. 551, Ed. 1 Friday, December 22, 2006
Free weekly newspaper that includes business and classified advertising.
Date:
December 22, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 44, No. 47, Ed. 1 Friday, February 22, 2013
Free weekly newspaper that includes business and classified advertising.
Date:
February 22, 2013
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 36, No. 287, Ed. 1 Friday, July 22, 2005
Free weekly newspaper that includes business and classified advertising.
Date:
July 22, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 42, No. 299, Ed. 1 Friday, July 22, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
July 22, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 36, No. 131, Ed. 1 Friday, April 22, 2005
Free weekly newspaper that includes business and classified advertising.
Date:
April 22, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 37, No. 395, Ed. 1 Friday, September 22, 2006
Free weekly newspaper that includes business and classified advertising.
Date:
September 22, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Water for long-term geothermal enegy production in the Imperial Valley
The geothermal resources of California's Imperial Valley have the potential for the production of an estimated 3000 to 5000 MW/yr of electricity for 30 yr, provided that adeuqate cooling water is available for power plants. There are five possible sources of cooling water: irrigation water, waste waters from agriculture, steam condensate, ground water, and water from the Salton Sea. Technical, environmental, and regulatory constraints, however, could limit the availability of the water supplies. Of particular concern are the constraints that could be imposed if different water policies were implemented. To study how future policies could affect geothermal development, six combinations of various policies were defined to represent potential regulatory controls. A range of future water balances in the valley was also specified. The water balances plus the six policy combinations were used to determine whether deficits of cooling water would eventually constrain low, medium, or high levels of geothermal energy production. A companion analysis of changes in the elevation and salinity of the Salton Sea resulting from the use of agricultural waters for cooling was also made.
Date:
September 22, 1978
Creator:
Layton, D. W.
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with James D. Dukes, October 22, 2002
The National Museum of the Pacific War presents an interview with James Dukes. Born in Alabama, Dukes quit school in 1937 to join the Civilian Conservation Corps (CCC). In March 1941, he joined the Marine Corps, and was sent to San Diego for boot camp. Dukes was then assigned to Company C, 1st Battalion, 8th Marines where he received mortar training. On 6 June 1942, he boarded the SS Lurline bound for Pago Pago, Samoa. During November 1942 the unit merged with the 2nd Marine Division when they landed on Guadalcanal. He was assigned to the Matanikau River and tells of subsequent actions in which some of his men were killed. Dukes was wounded and sent to the Silver Stream Hospital in New Zealand. Following surgery, he was sent to the Oak Knoll Naval Hospital. Dukes struggled with malaria. Throughout the interview, he expresses his admiration for the people of New Zealand. He returned to the US and received his discharge on 12 August 1945.
Date:
October 22, 2002
Creator:
Dukes, James D
Object Type:
Sound
System:
The Portal to Texas History
Electronic state alignment, orientation, and coherence produced by beam-foil collisions
The cylindrically symmetric beam-foil collision produces excitation and alignment of atom and ion levels similar, but not identical, to that resulting at comparable energies from ion-atom or ion-molecule collisions. When the foil is tilted, the macroscopic change acts on the microscopic scale to produce coherent alignment and orientation of the excited levels. The maximum beam energy range bounding this interaction has not yet been defined. The dynamic interaction which produces these effects is currently not predicted by any theory, although the dynamics of the ions subsequent to the collision are well understood. Refinement of current experimental technique can be expected to better define the final foil surface. The beam-tilted-foil collision promises to be useful in the study of ionic structure via quantum beat, radio-frequency and level-crossing spectroscopy techniques, and may provide a useful probe for certain surface interactions. 4 figs, 48 refs.
Date:
July 22, 1975
Creator:
Church, D. A.
Object Type:
Article
System:
The UNT Digital Library
Single-Bunch Tune and Beam Size Measurements Along Bunch Trains in PEP-II
By scanning gated cameras and gated tune monitors across the bunch pattern during normal colliding-bunch operation of PEP-II, the tunes and beam sizes of individual bunches were measured simultaneously in the high and low energy storage rings of PEP-II. The measurements were made with 1561 colliding bunches in PEP-II, arranged in trains of 66 bunches, with each bunch in the train separated by 4.2 ns. The tune and beam size measurements were correlated with the current, luminosity, and specific luminosity of the bunch. The results show a vertical tune shift at the start and end of the mini-trains, a luminosity droop along the mini-train, and specific luminosity drop in the first and last bunches of the train, since they experience a different parasitic crossing on either side of the interaction point (IP).
Date:
June 22, 2005
Creator:
Holtzapple, Robert; Dujmic, Denis & Fisher, Alan S.
Object Type:
Article
System:
The UNT Digital Library
Linearizing Intra-Train Beam-Beam Deflection Feedback
Beam-beam deflection feedback acting within the crossing time of a single bunch train may be needed to keep linear collider beams colliding at high luminosity. In a short-pulse machine such as the Next Linear Collider (NLC) this feedback must converge quickly to be useful. The non-linear nature of beam-beam deflection vs. beam-beam offset in these machines precludes obtaining both rapid convergence and a stable steady-state lock to beam offsets with a linear feedback algorithm. We show that a simply realizable programmable non-linear amplifier in the feedback loop can linearize the feedback loop, approximately compensating the beam-beam deflection non-linearity. Performance of a prototype non-linear amplifier is shown. Improvement of convergence and stability of the beam-beam feedback loop is simulated.
Date:
February 22, 2006
Creator:
Smith, S. R.
Object Type:
Article
System:
The UNT Digital Library
The Garland News. (Garland, Tex.), Vol. 17, No. 6, Ed. 1 Friday, May 22, 1903
Weekly newspaper from Garland, Texas that includes local, state, and national news along with advertising.
Date:
May 22, 1903
Creator:
Cullom, John H.
Object Type:
Newspaper
System:
The Portal to Texas History
Garland News. (Garland, Tex.), Vol. 19, No. 24, Ed. 1 Friday, September 22, 1905
Weekly newspaper from Garland, Texas that includes local, state, and national news along with advertising.
Date:
September 22, 1905
Creator:
Holford, Will A.
Object Type:
Newspaper
System:
The Portal to Texas History