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2.5 MHz feedforward beam loading compensation in the Fermilab Main Injector
There are five 2.5 MHz ferrite cavities (h = 28) in the Main Injector with an R/Q of 500 that are presently used for coalescing for the Tevatron. For use with the Fermilab Recycler, feedforward (FF) beam loading compensation (BLC) is required on these cavities because they will be required to operate at a net of 2 kV. Under current Recycler beam conditions, the beam-induced voltage is of this order. Recently a system using a digital bucket delay module operating at 53 MHz (h = 588) was used to produce a one-turn-delay feedforward signal. This signal was then combined with the low level RF signal to the 2.5 MHz cavities to cancel the beam induced voltage. During current operation they have shown consistently to operate with over a 20 dB reduction in beam loading.
Date:
May 19, 2003
Creator:
Dey, Joseph E.; Kourbanis, Ioanis & Steimel, James
Object Type:
Article
System:
The UNT Digital Library
3,2-HOPO Complexes of Near-Infra-Red (NIR) Emitting Lanthanides: Sensitization of Ho(III) and Pr(III) in Aqueous Solution
There is a growing interest in Near Infra-Red (NIR) emission originating from organic complexes of Ln{sup III} cations. As a major impetus, biological tissues are considerably more transparent at these low energy wavelengths when compared to visible radiation, which facilitates deeper penetration of incident and emitted light. Furthermore, the long luminescence lifetimes of Ln{sup III} complexes (eg. Yb{sup III}, {tau}{sub rad} {approx} 1 ms) when compared to typical organic molecules can be utilized to vastly improve signal to noise ratios by employing time-gating techniques. While the improved quantum yield of Yb{sub III} complexes when compared to other NIR emitters favors their use for bioimaging applications, there has also been significant interest in the sensitized emission from other 4f metals such as Ln = Nd, Ho, Pr and Er which have well recognized applications as solid state laser materials (eg. Nd {approx} 1.06 {micro}m, Ho {approx} 2.09 {micro}m), and in telecommunications (eg. Er {approx} 1.54 {micro}m) where they can be used for amplification of optical signals. As a result of their weak (Laporte forbidden) f-f absorptions, the direct excitation of Ln{sup III} cations is inefficient, and sensitization of the metal emission is more effectively achieved using the so-called antenna effect. We …
Date:
May 19, 2008
Creator:
Moore, Evan G.; Szigethy, Geza; Xu, Jide; Palsson, Lars-Olof; Beeby, Andrew & Raymond, Kenneth N.
Object Type:
Article
System:
The UNT Digital Library
9-11 Commission Hearing #5, November 19, 2003, Part 1
Recording of the fifth public hearing held by the National Commission on Terrorist Attacks upon the United States on November 19, 2003 at Drew University in Madison, New Jersey. The Commission heard from New Jersey Governor James E. McGreevey; four panels of business officials and federal, state, and local government representatives; and individuals working to enhance emergency preparedness in the private sector. This section includes the opening statements from Chairman Kean and Governor McGreevey, in addition to the first panel on risks and consequences of Terrorism for the private sector.
Date:
November 19, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #5, November 19, 2003, Part 2
Recording of the fifth public hearing held by the National Commission on Terrorist Attacks upon the United States on November 19, 2003 at Drew University in Madison, New Jersey. The Commission heard from New Jersey Governor James E. McGreevey; four panels of business officials and federal, state, and local government representatives; and individuals working to enhance emergency preparedness in the private sector. This section includes the panel on skyscraper safety issues from 9-11 family members with testimony from Monica Gabrielle and Sally Regenhard.
Date:
November 19, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #5, November 19, 2003, Part 3
Recording of the fifth public hearing held by the National Commission on Terrorist Attacks upon the United States on November 19, 2003 at Drew University in Madison, New Jersey. The Commission heard from New Jersey Governor James E. McGreevey; four panels of business officials and federal, state, and local government representatives; and individuals working to enhance emergency preparedness in the private sector. This section includes the panel on public/private initiatives since 9-11, with testimony from Micheal F. Byrne, Dennis J. Reimer, and Richard A. Andrews.
Date:
November 19, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #5, November 19, 2003, Part 4
Recording of the fifth public hearing held by the National Commission on Terrorist Attacks upon the United States on November 19, 2003 at Drew University in Madison, New Jersey. The Commission heard from New Jersey Governor James E. McGreevey; four panels of business officials and federal, state, and local government representatives; and individuals working to enhance emergency preparedness in the private sector. This section includes multimedia presentations of initiatives across the United States from Kings County, Washington, and the International Association Assembly Managers and the panel on private sector experience on 9-11 with testimony from William Y. Yun.
Date:
November 19, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #5, November 19, 2003, Part 5
Recording of the fifth public hearing held by the National Commission on Terrorist Attacks upon the United States on November 19, 2003 at Drew University in Madison, New Jersey. The Commission heard from New Jersey Governor James E. McGreevey; four panels of business officials and federal, state, and local government representatives; and individuals working to enhance emergency preparedness in the private sector. This section includes the panel on standards for emergency management and business continuity with testimony from Glenn Corbett and Randall Yim.
Date:
November 19, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #5, November 19, 2003, Part 6
Recording of the fifth public hearing held by the National Commission on Terrorist Attacks upon the United States on November 19, 2003 at Drew University in Madison, New Jersey. The Commission heard from New Jersey Governor James E. McGreevey; four panels of business officials and federal, state, and local government representatives; and individuals working to enhance emergency preparedness in the private sector. This section includes the panel on future strategies for private sector preparedness with testimony from William G. Raisch, Peter R. Orszag, James Haviaris, and Thomas Susman.
Date:
November 19, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #11, May 19, 2004, Part 2
Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes testimony from former Mayor of New York City, Rudolph W. Giuliani.
Date:
May 19, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #11, May 19, 2004, Part 3
Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes the fourth panel on the state of emergency preparedness across the nation, with testimony from Dennis Smith, Jerome M. Hauer, and Edward P. Plaugher.
Date:
May 19, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #11, May 19, 2004, Part 4
Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes the fourth panel on emergency preparedness throughout the nation and includes testimony from Michael Bloomberg, Mayor of New York.
Date:
May 19, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #,11 May 19, 2004, Part 5
Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes the fourth panel on emergency preparedness throughout the nation with testimony from Secretary of Homeland Security, Thomas J. Ridge.
Date:
May 19, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9/11 Commission Recommendations: Changes to the Presidential Appointment and Presidential Transition Processes
From Summary: "This report provides background information on, and analysis of, the changes proposed by the 9/11 Commission, and it will be updated as events warrant."
Date:
October 19, 2004
Creator:
Hogue, Henry B.
Object Type:
Report
System:
The UNT Digital Library
9/11 Commission Recommendations: Joint Committee on Atomic Energy — A Model for Congressional Oversight?
From Summary: "This report provides an outline of the structure and history of the Joint Committee on Atomic Energy and raises a number of issues that might be considered by policymakers as they weigh the suitability of the JCAE as a possible model when crafting congressional oversight mechanisms."
Date:
October 19, 2004
Creator:
Davis, Christopher M.
Object Type:
Report
System:
The UNT Digital Library
A 30 MW, 200 MHz Inductive Output Tube for RF Accelerators
This program investigated development of a multiple beam inductive output tube (IOT) to produce 30 MW pulses at 200 MHz. The program was successful in demonstrating feasibility of developing the source to achieve the desired power in microsecond pulses with 70% efficiency. The predicted gain of the device is 24 dB. Consequently, a 200 kW driver would be required for the RF input. Estimated cost of this driver is approximately $1.25 M. Given the estimated development cost of the IOT of approximately $750K and the requirements for a test set that would significantly increase the cost, it was determined that development could not be achieved within the funding constraints of a Phase II program.
Date:
June 19, 2008
Creator:
Ives, R. Lawrence & Read, Michael
Object Type:
Report
System:
The UNT Digital Library
50 years of excellence in science and engineering at the Savannah River Site
This is a collection of papers including abstracts about the celebration of 50 years of excellence in science and engineering at the Savannah River Site. The Symposium Committee invited current and former employees to nominate the innovations to be recognized. Several selection panels of experts in various technical fields reviewed 190 nominations and selected the achievements included in this proceedings. Neither the Symposium Committee nor the selection panels claim that these accomplishments are the best of the best. Instead, they believe that they typify the outstanding quality of science and engineering at the Site during its first half-century.
Date:
April 19, 2000
Creator:
Phillips, A G
Object Type:
Article
System:
The UNT Digital Library
53 MHZ Feedforward beam loading compensation in the Fermilab main injector
53 MHz feedforward beam loading compensation is crucial to all operations of the Main Injector. Recently a system using a fundamental frequency down converter mixer, a digital bucket delay module and a fundamental frequency up converter mixer were used to produce a one-turn-delay feedforward signal. This signal was then combined with the low level RF signal to the cavities to cancel the transient beam induced voltage. During operation they have shown consistently over 20 dB reduction in side-band voltage around the fundamental frequency during Proton coalescing and over 14 dB in multi-batch antiproton coalescing.
Date:
May 19, 2003
Creator:
al., Joseph E Dey et
Object Type:
Article
System:
The UNT Digital Library
103-06A-RH11 - State Input - VA - Regional Hearing 07-7-05 - National Capital Area
While we in Congress retain a right to review and reject the final recommendations in total, the commission is charged with reviewing and amending each recommendation to ensure the use of correct data, an accurate and substantiated assessment of cost savings, and---most importantly recommendations that advance the tenets of "military value" as clearly prescribed in law.
Date:
July 19, 2005
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Legal Document
System:
The UNT Digital Library
103-06A-RH11 - State Input - VA - Regional Hearing - 7-7-2005 - National Capital Area
Mr. Chairman, members, and staff of the Base Realignment and Closure Commission, the task you have before you is a difficult one, but essential to allow the Department of Defense to reduce their investment on unneeded facilities, thus freeing up resources for critical readiness requirements. You, and your colleagues who are not here today, are to be commended for the formidable challenge that you have assumed for the benefit of the American people and the men and women in uniform, the finest military in the world.
Date:
July 19, 2005
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Legal Document
System:
The UNT Digital Library
103-06A-RH13 - Media Briefing Book Regional Hearing - 7 -11-05 - San Antonio, TX part 1
Brooks City Base, TX B. Suggested Talking Points for Installation Visit C. Suggested Qs & As for Installation Visit D. Sampling of Local Media Coverage Relating to BRAC Naval Air Station Corpus Christi, TX E. Suggested Talking Points for Installation Visit F. Suggested Qs & As for Installation Visit G. Sampling of Local Media Coverage Relating to BRAC
Date:
July 19, 2005
Creator:
unknown
Object Type:
Legal Document
System:
The UNT Digital Library
103-06A-RH13 - Media Briefing Book Regional Hearing - 7 -11-05 - San Antonio, TX part 2
Lackland Air Force Base, TX K. Suggested Talking Points for Installation Visit L. Suggested Qs & As for Installation Visit M. Sampling of Local Media Coverage Relating to BRAC Naval Station Ingleside, TX N. Suggested Talking Points for Installation Visit o. Suggested Qs and As for Installation Visit P. Sampling of Local Media Coverage Relating to BRAC
Date:
July 19, 2005
Creator:
unknown
Object Type:
Legal Document
System:
The UNT Digital Library
103-06A - RH14 - Media Briefing Book Regional Hearing 7-14-05 - Los Angeles CA
Marine Corps Logistics Base Barstow, CA B. Suggested Talking Points for Installation Visit C. Suggested Qs & As for Installation Visit D. Sampling of Local Media Coverage Relating to BRAC Naval Support Activity Corona, CA E. Suggested Taking Points for Installation Visit F. Suggested Qs & As for Installation Visit G. Sampling of Local Media Coverage Relating to BRAC
Date:
July 19, 2005
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Legal Document
System:
The UNT Digital Library
103-06A-Rh15 - Media Briefing Book Regional Hearing - 7-22-05 - New Orleans - LA
Naval Air Station Pensacola, FL B. Suggested Talking Points C. Suggested Qs & As D. Sampling of Local Media Coverage Relating to BRAC Naval Ordinance Test Unit at Cape Canaveral Air Force Station, FL E. Suggested Talking Points F. Suggested Qs & As G. Sampling of Local Media Coverage Relating to BRAC Naval Support Activity New Orleans, LA H. Suggested Talking Points I. Suggested Qs & As J. Sampling of Local Media Coverage Relating to BRAC Naval Station Pascagoula, MS K. Suggested Talking Points L. Suggested Qs & As M. Sampling of Local Media Coverage Relating to BRAC
Date:
July 19, 2005
Creator:
unknown
Object Type:
Legal Document
System:
The UNT Digital Library
103-06A-RH5 - Media Briefing Book Regional Hearing - 6-23-05 - Grand Forks, ND
GRAND FORKS AIR FORCE BASE, ND A. Media Advisory B. Suggested Talking Points for Installation Visit C. Suggested Qs & As for Installation Visit D. Sampling of Local Media Coverage Relating to BRAC
Date:
July 19, 2005
Creator:
unknown
Object Type:
Legal Document
System:
The UNT Digital Library