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E-2 (Q-32) (12-3-12)
Photograph of Norman FD E-2. American LaFrance quint.
Date:
December 3, 2012
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
A 12 GHz RF Power Source for the CLIC Study
The CLIC RF frequency has been changed in 2008 from the initial 30 GHz to the European X-band 11.9942 GHz permitting beam independent power production using klystrons for CLIC accelerating structure testing. A design and fabrication contract for five klystrons at that frequency has been signed by different parties with SLAC. France (IRFU, CEA Saclay) is contributing a solid state modulator purchased in industry and specific 12 GHz RF network components to the CLIC study. RF pulses over 120 MW peak at 230 ns length will be obtained by using a novel SLED-I type pulse compression scheme designed and fabricated by IAP, Nizhny Novgorod, Russia. The X-band power test stand is being installed in the CLIC Test Facility CTF3 for independent structure and component testing in a bunker, but allowing, in a later stage, for powering RF components in the CTF3 beam lines. The design of the facility, results from commissioning of the RF power source and the expected performance of the Test Facility are reported.
Date:
July 3, 2012
Creator:
Schirm, Karl; Curt, Stephane; Dobert, Steffen; McMonagle, Gerard; Rossat, Ghislain; Syratchev, Igor et al.
Object Type:
Article
System:
The UNT Digital Library
500 MW X-Band RF System of a 0.25 GeV Electron LINAC for Advanced Compton Scattering Source Application
A Mono-Energetic Gamma-Ray (MEGa-Ray) Compton scattering light source is being developed at LLNL in collaboration with the SLAC National Accelerator Laboratory. The electron beam for the Compton scattering interaction will be generated by a X-band RF gun and a X-band LINAC at the frequency of 11.424 GHz. High power RF in excess of 500 MW is needed to accelerate the electrons to energy of 250 MeV or greater for the interaction. Two high power klystron amplifiers, each capable of generating 50 MW, 1.5 msec pulses, will be the main high power RF sources for the system. These klystrons will be powered by state of the art solid-state high voltage modulators. A RF pulse compressor, similar to the SLED II pulse compressor, will compress the klystron output pulse with a power gain factor of five. For compactness consideration, we are looking at a folded waveguide setup. This will give us 500 MW at output of the compressor. The compressed pulse will then be distributed to the RF gun and to six traveling wave accelerator sections. Phase and amplitude control are located at the RF gun input and additional control points along the LINAC to allow for parameter control during operation. This …
Date:
July 3, 2012
Creator:
Chu, Tak Sum; Anderson, Scott; Barty, Christopher; Gibson, David; Hartemann, Fred; Marsh, Roark et al.
Object Type:
Article
System:
The UNT Digital Library
2012 MITOCHONDRIA AND CHLOROPLASTS GORDON RESEARCH CONFERENCE & GORDON RESEARCH SEMINAR, JULY 29 - AUGUST 3, 2012
The 2012 Gordon Research Conference on Mitochondria and Chloroplasts will assemble an international group of scientists investigating fundamental properties of these organelles, and their integration into broader physiological processes. The conference will emphasize the many commonalities between mitochondria and chloroplasts: their evolution from bacterial endosymbionts, their genomes and gene expression systems, their energy transducing membranes whose proteins derive from both nuclear and organellar genes, the challenge of maintaining organelle integrity in the presence of the reactive oxygen species that are generated during energy transduction, their incorporation into organismal signaling pathways, and more. The conference will bring together investigators working in animal, plant, fungal and protozoan systems who specialize in cell biology, genetics, biochemistry, physiology, proteomics, genomics, and structural biology. As such, this conference will provide a unique forum that engenders cross-disciplinary discussions concerning the biogenesis, dynamics, and regulation of these key cellular structures. By fostering interactions among mammalian, fungal and plant organellar biologists, this conference also provides a conduit for the transmission of mechanistic insights obtained in model organisms to applications in medicine and agriculture. The 2012 conference will highlight areas that are moving rapidly and emerging themes. These include new insights into the ultrastructure and organization of the energy …
Date:
August 3, 2012
Creator:
Barkan, Alice
Object Type:
Article
System:
The UNT Digital Library
2012 MOLECULAR AND IONIC CLUSTERS GORDON RESEARCH CONFERENCE, JANUARY 29 - FEBRUARY 3, 2012
The Gordon Research Conference on 'Molecular and Ionic Clusters' focuses on clusters, which are the initial molecular species found in gases when condensation begins to occur. Condensation can take place solely from molecules interacting with each other, mostly at low temperatures, or when molecules condense around charged particles (electrons, protons, metal cations, molecular ions), producing ion molecule clusters. These clusters provide models for solvation, allow a pristine look at geometric as well as electronic structures of molecular complexes or matter in general, their interaction with radiation, their reactivity, their thermodynamic properties and, in particular, the related dynamics. This conference focuses on new ways to make clusters composed of different kinds of molecules, new experimental techniques to investigate the properties of the clusters and new theoretical methods with which to calculate the structures, dynamical motions and energetics of the clusters. Some of the main experimental methods employed include molecular beams, mass spectrometry, laser spectroscopy (from infrared to XUV; in the frequency as well as the time domain) and photoelectron spectroscopy. Techniques include laser absorption spectroscopy, laser induced fluorescence, resonance enhanced photoionization, mass-selected photodissociation, photofragment imaging, ZEKE photoelectron spectroscopy, etc. From the theoretical side, this conference highlights work on potential surfaces and …
Date:
February 3, 2012
Creator:
McCoy, Anne
Object Type:
Article
System:
The UNT Digital Library
2012 RADIATION CHEMISTRY GORDON RESEARCH CONFERENCE AND GORDON RESEARCH SEMINAR, JULY 28, - AUGUST 3, 2012
The overarching objective of this conference is to catalyze the interchange of new ideas and recent discoveries within the basic radiation sciences of physics, chemistry, and biology, and to facilitate translating this knowledge to applications in medicine and industry. The 9 topics for the GRC are: "ÂFrom Energy Absorption to Disease"Â, "ÂBiodosimetry after a Radiological Incident," "ÂTrack Structure and Low Energy Electrons," "Free Radical Processes in DNA and Proteins," "Irradiated Polymers for Industrial/ Medical Applications," "Space Radiation Chemistry/Biology," "Nuclear Power and Waste Management," "Nanoparticles and Surface Interfaces", and the "Young Investigator" session.
Date:
August 3, 2012
Creator:
LaVerne, y
Object Type:
Article
System:
The UNT Digital Library
["8th Annual Weekend Festival of Black Dance" live performance tape 1 of 3]
Video recording from The Black Academy of Arts and Letters recorded during the 6th annual weekend festival of black dance live performance held on March 3rd, 2012 at the Naomi Bruton Theatre. The footage shows the Happy Nia Dance Theatre, Djey Kunda West African Dance Company/Drum Ensemble and the Stella Maris Dance Company performing African and Jamaican contemporary and jazz styles of dance.
Date:
March 3, 2012
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
["8th Annual Weekend Festival of Black Dance" live performance tape 3 of 3]
Video recording from The Black Academy of Arts and Letters recorded during the 6th annual weekend festival of black dance live performance held on March 3rd, 2012 at the Naomi Bruton Theatre. The footage shows the Happy Nia Dance Theatre, Djey Kunda West African Dance Company/Drum Ensemble and the Stella Maris Dance Company performing African and Jamaican contemporary and jazz styles of dance.
Date:
March 3, 2012
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
[8th Annual Weekend Festival of Black Dance Rhythm and Soul of a People, tape 1 of 2]
Video footage from The Black Academy of Arts and Letters recorded during the 8th annual weekend festival of black dance held over the weekend of March 2-3rd, 2012. The footage shows young people in various groups and solo performances of contemporary style dance.
Date:
March 3, 2012
Creator:
King, Curtis & Waller, Alonzo
Object Type:
Video
System:
The UNT Digital Library
[8th Annual Weekend Festival of Black Dance, Rhythm and Soul of a People - Workshop with Stella Morris Dance Ensemble]
Video recording from The Black Academy of Arts and Letters recorded during their 8th Annual Weekend Festival of Black Dance, Rhythm and Soul of a People event in 2012. This video highlights a workshop with Stella Morris Dance Ensemble in preparation for the event.
Date:
March 3, 2012
Creator:
Waller, Alonzo
Object Type:
Video
System:
The UNT Digital Library
[8th Annual Weekend Festival of Black Dance, Rhythm and Soul of a People - Workshop with Stella Morris Dance Ensemble]
Video recording from The Black Academy of Arts and Letters recorded during their 8th Annual Weekend Festival of Black Dance, Rhythm and Soul of a People event in 2012. This video features a workshop with Stella Morris Dance Ensemble in preparation for the event.
Date:
March 3, 2012
Creator:
Waller, Alonzo
Object Type:
Video
System:
The UNT Digital Library
[8th Annual Weekend Festival of Black Dance, Rhythm and Soul of a People - Workshop with Stella Morris Dance Ensemble]
Video recording from The Black Academy of Arts and Letters recorded during their 8th Annual Weekend Festival of Black Dance, Rhythm and Soul of a People event in 2012. This video features a workshop with Stella Morris Dance Ensemble in preparation for the event.
Date:
March 3, 2012
Creator:
Waller, Alonzo
Object Type:
Video
System:
The UNT Digital Library
[8th Annual Weekend Festival of Black Dance, Rhythm and Soul of a People - Workshop with Stella Morris Dance Ensemble]
Video recording from The Black Academy of Arts and Letters recorded during their 8th Annual Weekend Festival of Black Dance, Rhythm and Soul of a People event in 2012. This video features a workshop with Stella Morris Dance Ensemble in preparation for the event. The video cuts at 30:07 then cuts back to workshop at 46:14. The video cuts at 1:26:25.
Date:
March 3, 2012
Creator:
Waller, Alonzo
Object Type:
Video
System:
The UNT Digital Library
["8th Annual Weekend Festival of Black Dance Workshop" 1 of 2]
Video recording from The Black Academy of Arts and Letters recorded during the 8th annual weekend festival of black dance masterclass held on March 3rd, 2012. The footage shows dancers of all ages doing workouts, stretches, and across the floor exercises.
Date:
March 3, 2012
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
["8th Annual Weekend Festival of Black Dance Workshop" 2 of 2]
Video recording from The Black Academy of Arts and Letters recorded during the 8th annual weekend festival of black dance masterclass held on March 3rd, 2012. The footage shows dancers of all ages doing workouts, stretches, and across the floor exercises.
Date:
March 3, 2012
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
[8th Annual Weekend Festival of Black Dance Workshop 2, tape 1 of 2]
Video recording from The Black Academy of Arts and Letters recorded during the 8th annual weekend festival of black dance masterclass held on March 3rd, 2012. The footage shows young dancers doing workouts, stretches, and across the floor exercises.
Date:
March 3, 2012
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
[8th Annual Weekend Festival of Black Dance Workshop 2, tape 2 of 2]
Video recording from The Black Academy of Arts and Letters recorded during the 8th annual weekend festival of black dance masterclass held on March 3rd, 2012. The footage shows young dancers doing workouts, stretches, and across the floor exercises.
Date:
March 3, 2012
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
[8th Annual Weekend Festival of Black Dance Workshop, tape 2 of 2]
Video footage from The Black Academy of Arts and Letters recorded during the 8th annual weekend festival of black dance held over the weekend of March 2-3rd, 2012. The footage shows young dancers participating in a workshop led by instructor Dereque Whiturs.
Date:
March 3, 2012
Creator:
King, Curtis & Waller, Alonzo
Object Type:
Video
System:
The UNT Digital Library
[8th Annual Weekend Festival of Black Dance, Workshop with Dereque Whiturs]
Video recording from The Black Academy of Arts and Letters recorded during their 8th Annual Weekend Festival of Black Dance event in 2012. This video features a workshop with Dereque Whiturs in preparation for the event.
Date:
March 3, 2012
Creator:
Waller, Alonzo
Object Type:
Video
System:
The UNT Digital Library
THE ABSORPTION OF HYDROGEN ON LOW PRESSURE HYDRIDE MATERIALS
For this study, hydrogen getter materials (Zircaloy-4 and pure zirconium) that have a high affinity for hydrogen (and low overpressure) have been investigated to determine the hydrogen equilibrium pressure on Zircaloy-4 and pure zirconium. These materials, as with most getter materials, offered significant challenges to overcome given the low hydrogen equilibrium pressure for the temperature range of interest. Hydrogen-zirconium data exists for pure zirconium at 500 C and the corresponding hydrogen overpressure is roughly 0.01 torr. This manuscript presents the results of the equilibrium pressures for the absorption and desorption of hydrogen on zirconium materials at temperatures ranging from 400 C to 600 C. The equilibrium pressures in this temperature region range from 150 mtorr at 600 C to less than 0.1 mtorr at 400 C. It has been shown that the Zircaloy-4 and zirconium samples are extremely prone to surface oxidation prior to and during heating. This oxidation precludes the hydrogen uptake, and therefore samples must be heated under a minimum vacuum of 5 x 10{sup -6} torr. In addition, the Zircaloy-4 samples should be heated at a sufficiently low rate to maintain the system pressure below 0.5 mtorr since an increase in pressure above 0.5 mtorr could possibly …
Date:
April 3, 2012
Creator:
Morgan, G. & Korinko, P.
Object Type:
Article
System:
The UNT Digital Library
ACA: A Brief Overview of the Law, Implementation, and Legal Challenges
This report summarizes the Affordable Care Act (ACA) and the legal challenges it has faced. The report contains information on various lawsuits due to the ACA and provides the reasoning behind them as Congress violating its enumerated powers in the constitution. Moreover, the report covers the challenges of implementing the law.
Date:
July 3, 2012
Creator:
Redhead, C. Stephen; Chaikind, Hinda; Fernandez, Bernadette & Staman, Jennifer
Object Type:
Report
System:
The UNT Digital Library
Advanced X-Band Test Accelerator for High Brightness Electron and Gamma Ray Beams
In support of Compton scattering gamma-ray source efforts at LLNL, a multi-bunch test stand is being developed to investigate accelerator optimization for future upgrades. This test stand will enable work to explore the science and technology paths required to boost the current 10 Hz monoenergetic gamma-ray (MEGa-Ray) technology to an effective repetition rate exceeding 1 kHz, potentially increasing the average gamma-ray brightness by two orders of magnitude. Multiple bunches must be of exceedingly high quality to produce narrow-bandwidth gamma-rays. Modeling efforts will be presented, along with plans for a multi-bunch test stand at LLNL. The test stand will consist of a 5.5 cell X-band rf photoinjector, single accelerator section, and beam diagnostics. The photoinjector will be a high gradient standing wave structure, featuring a dual feed racetrack coupler. The accelerator will increase the electron energy so that the emittance can be measured using quadrupole scanning techniques. Multi-bunch diagnostics will be developed so that the beam quality can be measured and compared with theory. Design will be presented with modeling simulations, and layout plans.
Date:
July 3, 2012
Creator:
Marsh, Roark; Anderson, Scott; Barty, Christopher; Chu, Tak Sum; Ebbers, Chris; Gibson, David et al.
Object Type:
Article
System:
The UNT Digital Library
Advancing the Deployment of Utility-Scale Photovoltaic Plants in the Northeast
As one of the premier research laboratories operated by the Department of Energy, Brookhaven National Laboratory (BNL) is pursuing an energy research agenda that focuses on renewable energy systems and will help to secure the nation's energy security. A key element of the BNL research is the advancement of grid-connected utility-scale solar photovoltaic (PV) plants, particularly in the northeastern part of the country where BNL is located. While a great deal of information has been generated regarding solar PV systems located in mostly sunny, hot, arid climates of the southwest US, very little data is available to characterize the performance of these systems in the cool, humid, frequently overcast climates experienced in the northeastern portion of the country. Recognizing that there is both a need and a market for solar PV generation in the northeast, BNL is pursuing research that will advance the deployment of this important renewable energy resource. BNL's research will leverage access to unique time-resolved data sets from the 37MWp solar array recently developed on its campus. In addition, BNL is developing a separate 1MWp solar research array on its campus that will allow field testing of new PV system technologies, including solar modules and balance of …
Date:
June 3, 2012
Creator:
Lofaro, Robert; Villaran, Michael & Colli, Alessandra
Object Type:
Article
System:
The UNT Digital Library
Afghanistan: Post-Taliban Governance, Security, and U.S. Policy
This report discusses the current political state of Afghanistan, focusing particularly on the influence of the Taliban and other militant groups and on the leadership of Afghan President Hamid Karzai. This report also discusses the U.S.-Afghanistan relationship, in both the short and long term, and U.S. efforts under the Obama Administration to provide military, reconstructive, and stabilization aid.
Date:
May 3, 2012
Creator:
Katzman, Kenneth
Object Type:
Report
System:
The UNT Digital Library