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Booster's coupled bunch damper upgrade
A new narrowband active damping system for longitudinal coupled bunch (CB) modes in the Fermilab Booster has recently been installed and tested. In the past, the Booster active damper system consisted of four independent front-ends. The summed output was distributed to the 18, h=84 RF accelerating cavities via the RF fan-out system. There were several problems using the normal fan-out system to deliver the longitudinal feedback RF. The high power RF amplifiers normally operate from 37 MHz to 53 MHz whereas the dampers operate around 83MHz. Daily variations in the tuning of the RF stations created tuning problems for the longitudinal damper system. The solution was to build a dedicated narrowband, Q {approx} 10, 83MHz cavity powered with a new 3.5kW solid-state amplifier. The cavity was installed in June 2002 and testing of the amplifier and damper front-end began in August 2002. A significant improvement has been made in both operational stability and high intensity beam damping. At present there are five CB modes being damped and a sixth mode module is being built. The new damper hardware is described and data showing the suppression of the coupled-bunch motion at high intensity is presented.
Date:
August 14, 2003
Creator:
Wildman, William A. Pellico and D. W.
Object Type:
Article
System:
The UNT Digital Library
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Tuesday, August 14, 2001
Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
August 14, 2001
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
Broadband Internet Access and the Digital Divide: Federal Assistance Programs
This report provides information about the Broadband Internet Access and the Digital Divide through Federal Assistance Programs.Digital divide used to characterize the gap between "information have and have-not."
Date:
August 14, 2007
Creator:
Kruger, Lennard G. & Gilroy, Angele A.
Object Type:
Report
System:
The UNT Digital Library
Bureau of Indian Affairs: Use of Highway Trust Fund Resources
Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the Bureau of Indian Affairs' (BIA) use of federal Highway Trust Fund (HTF) money for Indian reservation roads, focusing on: (1) what percentage of fiscal years 1999 and 1998 HTF contract authority available to BIA was obligated for: (a) management costs directly related to specific projects within a program for construction, repair, and improvement of roads; and (b) program management and oversight costs not directly related to specific projects; (2) whether BIA spent more than 6 percent of the contract authority allocated to its Midwest and Western Regional Offices on non-project-related program management costs for those offices; (3) whether the annual 6 percent statutory limitation on the use of HTF contract authority for road program management costs applies only to non-project-related management costs; and (4) whether the project-related costs that BIA bears for individual tribes should be paid from HTF contract authority or from BIA's annual appropriations for managing Indian programs or construction."
Date:
August 14, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
CALCULATION: PRECIPITATION CHARACTERISITICS FOR STORM WATER MANAGEMENT
This Calculation is intended to satisfy engineering requirements for maximum 60-minute precipitation amounts for 50 and 100-year return periods at and near Yucca Mountain. This data requirement is documented in the ''Interface Control Document for Support Operations to Surface Facilities Operations Functional and Organizational Interfaces'' (CRWMS M&O 1998a). These developed data will supplement the information on 0.1 hour to 6-hour (in 0.1-hour increments) probable maximum precipitation (PMP) presented in the report, ''Precipitation Design Criteria for Storm Water Management'' (CRWMS M&O 1998b). The Reference Information Base (RIB) item, Precipitation ''Characteristics for Storm Water Management'' (M09902RIB00045 .OOO), was developed based on CRWMS M&O (1998b) and will be supplemented (via revision) with the information developed in this Calculation. The ''Development Plan for the Calculation: Precipitation Characteristics for Storm Water Management'' (CRWMS M&O 2000) was prepared in accordance with AP-2.l3Q, ''Technical Product Development Planning''. This calculation was developed in accordance with AP-3.12Q, Rev. O/ICN 2.
Date:
August 14, 2000
Creator:
Ambos, D.
Object Type:
Report
System:
The UNT Digital Library
The Canadian Record (Canadian, Tex.), Vol. 113, No. 33, Ed. 1 Thursday, August 14, 2003
Weekly newspaper from Canadian, Texas that includes local, state and national news along with some advertising.
Date:
August 14, 2003
Creator:
Brown, Laurie Ezzell
Object Type:
Newspaper
System:
The Portal to Texas History
The Canadian Record (Canadian, Tex.), Vol. 118, No. 33, Ed. 1 Thursday, August 14, 2008
Weekly newspaper from Canadian, Texas that includes local, state and national news along with some advertising.
Date:
August 14, 2008
Creator:
Brown, Laurie Ezzell
Object Type:
Newspaper
System:
The Portal to Texas History
Characteristics of Workload on Asci Blue-Pacific at Lawrence Livermore National Laboratory
Symmetric multiprocessor (SMP) clusters have become the prevalent computing platforms for large-scale scientific computation in recent years mainly due to their good scalability. In fact, many parallel machines being used at supercomputing centers and national laboratories are of this type. It is critical and often very difficult on such large-scale parallel computers to efficiently manage a stream of jobs, whose requirement for resources and computing time greatly varies. Understanding the characteristics of workload imposed on a target environment plays a crucial role in managing system resources and developing an efficient resource management scheme. A parallel workload is analyzed typically by studying the traces from actual production parallel machines. The study of the workload traces not only provides the system designers with insight on how to design good processor allocation and job scheduling policies for efficient resource management, but also helps system administrators monitor and fine-tune the resource management strategies and algorithms. Furthermore, the workload traces are a valuable resource for those who conduct performance studies through either simulation or analytical modeling. The workload traces can be directly fed to a trace-driven simulator in a more realistic and specific simulation experiments. Alternatively, one can obtain certain parameters that characterize the workload …
Date:
August 14, 2000
Creator:
Yoo, A. B. & Jette, M. A.
Object Type:
Article
System:
The UNT Digital Library
Chemistry and Materials Science Directorate 2002 Postdoctoral Symposium
The understanding of the physical mechanisms by which important biological inhibitors control the nucleation, growth, aggregation, and phase transformation of calcium oxalate crystals at fundamental level is of importance not only to the advances in biomineralization but also to the development of stone disease therapy. Of the three phases of calcium oxalate crystalline, calcium oxalate monohydrate (COM) and dehydrate (COD) are found in the majority of stones formed in the urinary system. Only COM, a major inorganic component of kidney stones, produces adverse physiological effects to human, however. Although a great deal of research has been carried out on the modulation of nucleation, growth, aggregation, and phase transformation of calcium oxalates by biological molecules, the basic mechanism has not yet been determined due to inherent limitations of those techniques that have been utilized The invention of atomic force microscopy (AFM) has opened a new avenue for the study of the crystal growth in general. One can now probe the growth kinetics and dynamics, and morphology of crystal surfaces down to molecular levels as a typical AFM has a lateral resolution of nanometers. In this study, in situ AFM was used to monitor the COM surface under controlled growth conditions. The …
Date:
August 14, 2002
Creator:
Wirth, B D
Object Type:
Report
System:
The UNT Digital Library
Cherokeean/Herald (Rusk, Tex.), Vol. 153, No. 25, Ed. 1 Wednesday, August 14, 2002
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
August 14, 2002
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
China’s Internet Industry
This report discusses China’s Internet Industry.
Date:
August 14, 2000
Creator:
Lum, Thomas
Object Type:
Report
System:
The UNT Digital Library
The Clifton Record (Clifton, Tex.), Vol. 107, No. 65, Ed. 1 Wednesday, August 14, 2002
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
August 14, 2002
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
College Student Stress: Relationship Anxiety, Negative Affect, Self-Esteem, and Morality-Conscience Guilt
This poster describes measures of relationship anxiety, negative affect, self-esteem, and morality-conscience guilt used to discuss stress-coping methods of college students.
Date:
August 14, 2008
Creator:
Renwick, Anthony; Chng, Chwee-Lye & Vosvick, Mark A.
Object Type:
Poster
System:
The UNT Digital Library
The Colony Courier-Leader (The Colony, Tex.), Vol. 21, No. 27, Ed. 1 Wednesday, August 14, 2002
Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date:
August 14, 2002
Creator:
Shafer, Leah
Object Type:
Newspaper
System:
The Portal to Texas History
Comanche Chief (Comanche, Tex.), No. 15, Ed. 1 Thursday, August 14, 2003
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
August 14, 2003
Creator:
Wilkerson, James C., III
Object Type:
Newspaper
System:
The Portal to Texas History
Comanche Chief (Comanche, Tex.), No. 16, Ed. 1 Thursday, August 14, 2008
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
August 14, 2008
Creator:
Wilkerson, James C., III
Object Type:
Newspaper
System:
The Portal to Texas History
Complexity and Synchronization
This article discusses complexity and synchronization in decision making and information transmission.
Date:
August 14, 2009
Creator:
Turalska, Malgorzata; Lukovic, Mirko; West, Bruce J. & Grigolini, Paolo
Object Type:
Article
System:
The UNT Digital Library
[Computer Hardware in Digital Projects Unit]
Photograph of computer hardware in Digital Project Unit at Willis Library, on University of North Texas campus. A computer with two ViewSonic monitors is set up in the foreground. A book is open in front of the keyboard; an Epson scanner is sitting to the right of the computer. In the background, there is a man identified as Andres Cardonas sitting behind two computer monitors; a woman identified as Sarah Lynn Fisher is standing to the left.
Date:
August 14, 2008
Creator:
Jones, Jerrell
Object Type:
Photograph
System:
The Portal to Texas History
Congressional Budget Resolutions: Motions to Instruct Conferees
This report provides an overview of the motions to instruct conferees as a congressional budget resolution.
Date:
August 14, 2007
Creator:
Keith, Robert
Object Type:
Report
System:
The UNT Digital Library
Congressional Liaison Offices of Selected Federal Agencies
This list of about 150 congressional liaison offices is intended to help congressional offices in placing telephone calls and addressing correspondence to government agencies. In each case, the information was supplied by the agency itself and is current as of the date of publication. Entries are arranged alphabetically in four sections: legislative branch; judicial branch; executive branch; and agencies, boards, and commissions.
Date:
August 14, 2009
Creator:
Crane-Hirsch, Audrey Celeste
Object Type:
Report
System:
The UNT Digital Library
Consumer Safety: Better Information and Planning Would Strengthen CPSC's Oversight of Imported Products
A letter report issued by the Government Accountability Office with an abstract that begins "The growing volume of consumer products imported into the United States has strained the resources of the Consumer Product Safety Commission (CPSC), challenging the agency to find new ways to ensure the safety of these products. The Consumer Product Safety Improvement Act (CPSIA) mandated that GAO assess the effectiveness of CPSC's authorities over imported products. GAO's objectives were to (1) determine what is known about CPSC's effectiveness in using these authorities, (2) compare CPSC's authorities with those of selected U.S. agencies and international entities, and (3) evaluate CPSC's plans to prevent the entry of unsafe consumer products. To address these objectives, GAO analyzed CPSC and other agencies' and entities' authorities, reviewed literature on consumer product safety, and compared CPSC's planning efforts with criteria for effective planning practices."
Date:
August 14, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Controlling Stimulated Brillouin Backscatter with Beam Smoothing in Weakly Damped Systems
None
Date:
August 14, 2007
Creator:
Divol, L
Object Type:
Article
System:
The UNT Digital Library
Cooper Review (Cooper, Tex.), Vol. 123, No. 33, Ed. 1 Thursday, August 14, 2003
Weekly newspaper from Cooper, Texas that includes local, state, and national news along with advertising.
Date:
August 14, 2003
Creator:
Pinson, Beth
Object Type:
Newspaper
System:
The Portal to Texas History
Cooper Review (Cooper, Tex.), Vol. 128, No. 32, Ed. 1 Thursday, August 14, 2008
Weekly newspaper from Cooper, Texas that includes local, state, and national news along with advertising.
Date:
August 14, 2008
Creator:
Palmer, Roger
Object Type:
Newspaper
System:
The Portal to Texas History