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431
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1.1-meter bore, 8-Tesla test facility
The design and fabrication of a 1.1-m bore superconducting coil for an 8- T facility at Lawrence Livermore Laboratory are discussed. This facility will provide the backing field required for testing large multifilamentary Nb$sub 3$Sn coils as part of the superconductor development program at Livermore. The magnet measures 1.85 m o.d., is 1.5 m in length, and is solenoid wound in four separate modules. Total cold weight of the assembly is 18,000 Kg. A NbTi superconductor is used throughout with a gradation of current density within the magnet to provide complete cryostatic stability. The preliminary design of a large 3500-A multifilamentary Nb$sub 3$Sn insert magnet is also included. Together, the backing coil and insert magnets are designed to produce a 12-T central field in a 0.4m bore. The ''equal area'' theory of cryostatic stability is applied in the design of both magnet systems and is discussed in detail. A large open-mouth cryostat is used and measures 2 m in diameter and 3.7 m in length. Details of Dewar design and the refrigeration requirements are included. (auth)
Date:
November 19, 1975
Creator:
Nelson, R.; Cornish, D.; Zbasnik, J.; Sackett, S. & Taylor, C.
Object Type:
Article
System:
The UNT Digital Library
1.5% boron, stainless steel
A test report on the brittleness of borated steel to be used in the KIWI B-5 shield capsules.
Date:
September 19, 1962
Creator:
Schreiber, J.J.
Object Type:
Report
System:
The UNT Digital Library
1-D Van der Waals Foams Heated by Ion Beam Energy Deposition
One dimensional simulations of various initial average density aluminum foams (modeled as slabs of solid metal separated by low density regions) heated by volumetric energy deposition are conducted with a Lagrangian hydrodynamics code using a van der Waals equation of state (EOS). The resulting behavior is studied to facilitate the design of future warm dense matter (WDM) experiments at LBNL. In the simulations the energy deposition ranges from 10 to 30 kJ/g and from 0.075 to 4.0 ns total pulse length, resulting in temperatures from approximately 1 to 4 eV. We study peak pressures and temperatures in the foams, expansion velocity, and the phase evolution. Five relevant time scales in the problem are identified. Additionally, we present a method for characterizing the level of inhomogeneity in a foam target as it is heated and the time it takes for a foam to homogenize.
Date:
March 19, 2010
Creator:
Zylstra, A; Barnard, J J & More, R M
Object Type:
Article
System:
The UNT Digital Library
1-MWE Heat Exchangers for OTEC Final Design Report
The design of a 1 MWe OTEC heat exchanger is documented, including the designs of the evaporator and associated systems, condenser, instrumentation, and materials for corrosion/erosion control and fabrication processes. (LEW)
Date:
June 19, 1980
Creator:
Sprouse, A.M.
Object Type:
Report
System:
The UNT Digital Library
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
3-D numerical analysis of a high-gain free-electron laser
We present a novel approach to the 3-dimensional high-gain free- electron laser amplifier problem. The method allows us to write the laser field as an integral equation which can be efficiently and accurately evaluated on a small computer. The model is general enough to allow the inclusion of various initial electron beam distributions to study the gain reduction mechanism and its dependence on the physical parameters. 16 refs., 8 figs., 1 tab.
Date:
October 19, 1988
Creator:
Gallardo, J.C.
Object Type:
Report
System:
The UNT Digital Library
N >= 4 Supergravity Amplitudes from Gauge Theory at One Loop
We expose simple and practical relations between the integrated four- and five-point one-loop amplitudes of N {ge} 4 supergravity and the corresponding (super-)Yang-Mills amplitudes. The link between the amplitudes is simply understood using the recently uncovered duality between color and kinematics that leads to a double-copy structure for gravity. These examples provide additional direct confirmations of the duality and double-copy properties at loop level for a sample of different theories.
Date:
August 19, 2011
Creator:
Bern, Z.; Boucher-Veronneau, C. & Johansson, H.
Object Type:
Article
System:
The UNT Digital Library
5 Kwe Reactor T/E Unmanned System Test
None
Date:
September 19, 1972
Creator:
Beoletto, J.A.
Object Type:
Report
System:
The UNT Digital Library
8-Hydroxyquinoline Colorimetric Method for the Determination of Microgram Quantities of Uranium
None
Date:
November 19, 1947
Creator:
Lee, D. A. & Woodard, R. W.
Object Type:
Report
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
30+ years of plasma simulation
None
Date:
December 19, 1990
Creator:
Langdon, B.
Object Type:
Article
System:
The UNT Digital Library