Accidental Contamination of Samples Used in Canadian Lynx Study Rendered the Study's Preliminary Conclusion Invalid (open access)

Accidental Contamination of Samples Used in Canadian Lynx Study Rendered the Study's Preliminary Conclusion Invalid

Correspondence issued by the General Accounting Office with an abstract that begins "This report discusses the validity of the results of a 1998 study of the Canadian lynx. The Forest Service contracted with Dr. John Weaver of the Wildlife Conservation Society in New York City to help survey the Canadian lynx in the Cascade Mountains of Washington and Oregon. In a March 1999 interim report, Dr. Weaver concluded that the Canadian lynx lives in some forests in Washington and Oregon. In March 2000, the Fish and Wildlife Service placed the lynx on its list of threatened species in the forested portions of 13 states, including Washington and Oregon. Issues have since been raised about whether the study's results were falsified. GAO found no evidence that the study was deliberately falsified."
Date: August 14, 2001
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Applying Agreed-Upon Procedures: House Interparliamentary Groups (open access)

Applying Agreed-Upon Procedures: House Interparliamentary Groups

Correspondence issued by the General Accounting Office with an abstract that begins "To assist the Committee on International Relations evaluate the extent to which five House Interparliamentary Groups' schedules of receipts, disbursements, and fund balance for 2000 and 1999 appropriately reflected the cash receipts and disbursements and fund balance for those years, GAO reviewed documentation supporting each group's recorded receipt and disbursement transactions and related fund balances for evidence that the transactions were properly authorized and recorded. The schedules, prepared by the treasurer of each group, present for 2000 and 1999 the opening fund balance, total receipts, and disbursements by category, and ending fund balance, on a cash basis, for each of the five groups. GAO also recalculated and compared the recalculated amounts to the reported amounts in each group's 2000 and 1999 schedule."
Date: August 14, 2001
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Liquid Scoping Study for Tritium-Lean, Fast Ignition Inertial Fusion Energy Power Plants (open access)

Liquid Scoping Study for Tritium-Lean, Fast Ignition Inertial Fusion Energy Power Plants

In a thick-liquid protected chamber design, such as HYLIFE-II, a molten-salt is used to attenuate neutrons and protect the chamber structures from radiation damage. The molten-salt absorbs some of the material and energy given off by the target explosion. In the case of a fast ignition inertial fusion system, advanced targets have been proposed that may be Self-sufficient in the tritium breeding (i.e., the amount of tritium bred in target exceeds the amount burned). These ''tritium-lean'' targets contain approximately 0.5% tritium and 99.5% deuterium, but require a large pr of 10-20 g/cm{sup 2}. Although most of the yield is provided by D-T reactions, the majority of fusion reactions are D-D, which produces a net surplus of tritium. This aspect allows for greater freedom when selecting a liquid for the protective blanket (lithium-bearing compounds are not required). This study assesses characteristics of many single, binary, and ternary molten-salts. Using the NIST Properties of Molten Salts Database, approximately 4300 molten-salts were included in the study [1]. As an initial screening, salts were evaluated for their safety and environmental (S&E) characteristics, which included an assessment of waste disposal rating, contact dose, and radioactive afterheat. Salts that passed the S&E criteria were then evaluated …
Date: August 14, 2001
Creator: Schmitt, R. C.; Latkowski, J. F.; Durbin, S. G.; Meier, W. R. & Reyes, S.
Object Type: Report
System: The UNT Digital Library
Veterans Issues in the 107th Congress (open access)

Veterans Issues in the 107th Congress

None
Date: August 14, 2001
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Research and Development for X-Ray Optics and Diagnostics on the Linac Coherent Light Source (LCLS) (open access)

Research and Development for X-Ray Optics and Diagnostics on the Linac Coherent Light Source (LCLS)

The Linac Coherent Light Source (LCLS) is a 1.5 to 15 {angstrom}-wavelength free-electron laser (FEL), currently proposed for the Stanford Linear Accelerator Center (SLAC). The photon output consists of high brightness, transversely coherent pulses with duration <300 fs, together with a broad spontaneous spectrum with total power comparable to the coherent output. The output fluence, and pulse duration, pose special challenges for optical component and diagnostic designs. We first discuss the specific requirements for the initial scientific experiments, and our proposed solutions. We then describe the supporting research and development program that includes: experimental and theoretical material damage studies; high resolution multilayer design, fabrication, and testing; replicated closed-form optics design and manufacturing; BeB manufacturing; and low-z Fresnel lens design, fabrication and testing. Finally some novel concepts for optical components are presented.
Date: August 14, 2001
Creator: Wootton, A.; Arthur, J.; Barbee, T.; Bionta, R.; Jankowski, Alan Frederic; London, R. et al.
Object Type: Article
System: The UNT Digital Library
Federal Estate, Gift, and Generation-Skipping Transfer Taxes: Modification, Phase Out and Repeal Under the Economic Growth and Tax Relief Reconciliation Act of 2001 (open access)
Studies of Dynamic Properties of Shock Compressed FCC Crystals by in Situ Dynamic X-Ray Diffraction (open access)

Studies of Dynamic Properties of Shock Compressed FCC Crystals by in Situ Dynamic X-Ray Diffraction

There were 5 laser experiments conducted to date in FY-01 under the ongoing project to study the response of single crystal fcc materials under shock compression. An additional 10 laser shots are planned for August, 2001. This work has focused on developing capability to record diffraction from multiple lattice planes during the passage of a shock through a thin foil of single crystal copper, while simultaneously performing separate shock sample recovery experiments to study the residual deformation structure in the recovered samples.
Date: August 14, 2001
Creator: Baldis, H.; Kalantar, D. H.; Remington, B. A.; Belak, J.; Colvin, J.; Boehly, T. R. et al.
Object Type: Report
System: The UNT Digital Library
Monitoring the Durability Performance of Concrete in Nuclear Waste Containment (open access)

Monitoring the Durability Performance of Concrete in Nuclear Waste Containment

OAK-B135 Monitoring the Durability Performance of Concrete in Nuclear Waste Containment
Date: August 14, 2001
Creator: Ulm, Franz-Josef
Object Type: Report
System: The UNT Digital Library
Impoundment and Sale of Cattle Trespassing on Federal Public Lands (open access)

Impoundment and Sale of Cattle Trespassing on Federal Public Lands

This report explores the authority of BLM personnel regarding unauthorized cattle by reviewing the statutory authorities of BLM over the federal rangelands under its administration, and the regulations and administrative materials implementing those authorities in the context of grazing, trespass, impoundment and sale of unauthorized livestock.
Date: August 14, 2001
Creator: Baldwin, Pamela
Object Type: Report
System: The UNT Digital Library
Solar Electricity: The Power of Choice, Second Quarter 2001 (open access)

Solar Electricity: The Power of Choice, Second Quarter 2001

Solar Electricity - The Power of Choice (formerly NREL PV Working With Industry) is a quarterly newsletter devoted to the photovoltaics (PV) research and development activities performed by NREL staff in concert with their industry and university partners. This issue is devoted to demonstrating that PV R and D is a valuable investment for the United States. The editorialist for this issue is Larry Kazmerski, director of the National Center for Photovoltaics.
Date: August 14, 2001
Creator: Moon, S.; Cook, G. & Schnelten, K.
Object Type: Book
System: The UNT Digital Library
Modeling of the primary proton beamline of the Fermilab NuMI project (open access)

Modeling of the primary proton beamline of the Fermilab NuMI project

The 120 GeV primary proton beamline for the NuMI-MINOS [1] experiment at Fermilab will transport one of the most intense high-energy beams ever constructed. in parallel operation with the Collider program, 80% of the intensity capability of the Fermilab Main Injector can be sent to NuMI. Radiation safety pertaining to residual activity, damage of equipment and irradiation of groundwater is a primary concern. A particular challenge is that this beam will be transported to and targeted in a cavern excavated in rock in an aquifer region. A model of the beamline, including transport elements and excavated enclosures, has been built in the radiation simulation program MARS. This model has been used to determine limits for allowable beam loss, and to study effects of instabilities and of various failure types. Some results obtained with this model are presented.
Date: August 14, 2001
Creator: Striganov, Sergei; Childress, S.; Drozhdin, S.; Grossman, N.; Lucas, P. & Mokhov, N.
Object Type: Article
System: The UNT Digital Library
Experience with magnetic shielding of a large scale accelerator (open access)

Experience with magnetic shielding of a large scale accelerator

It is not unusual to place multiple accelerators in a common enclosure to save on civil construction costs. This often complicates operations, especially if accelerators are affecting each other. At Fermilab, the influence of a rapidly cycling Main Injector (MI) synchrotron on an antiproton storage ring (Recycler), placed in a common tunnel, was initially found to be unacceptable for a reliable operation of the Recycler. Initial closed orbit excursions in the Recycler ring during the MI ramp were in excess of 5 mm (rms). This paper describes a shielding technique, used to reduce these orbit excursions by a factor of five.
Date: August 14, 2001
Creator: al., Sergei Nagaitsev et
Object Type: Article
System: The UNT Digital Library
Upgrade of the Wide-Angle Neutron Diffractometer at the High-Flux Isotope Reactor (open access)

Upgrade of the Wide-Angle Neutron Diffractometer at the High-Flux Isotope Reactor

The Wide-Angle Neutron Diffractometer (WAND) installed at the High-Flux Isotope Reactor (HFIR) has been upgraded for new experiments. The main feature of this upgrade is the replacement of its detector with a newly developed curved one-dimensional 3He position-sensitive counter composed of 624 individual anodes. From the results of test-measurements of the detector performance, it is found that the intrinsic angular resolution and the maximum neutron-counting rate per anode are 0.25 degrees and 2.0 x 10 counts/second, respectively.
Date: August 14, 2001
Creator: Ishii, Y.
Object Type: Article
System: The UNT Digital Library
Large aperture magnets for a future high power proton synchrotron (open access)

Large aperture magnets for a future high power proton synchrotron

A high intensity, high power proton synchrotron is currently under consideration at Fermilab. The machine--known as the Proton Driver--would accelerate 3 x 10{sup 13} protons from 400 MeV to 12 GeV (stage I) or 16 GeV (stage II) and ultimately deliver in excess of 1 MW of beam power. To minimize losses and insure beam stability, the space charge-induced tune shift must be kept well below 0.5. This is accomplished by spreading out bunches both longitudinally and transversely. While the former strategy favors high voltage low frequency RF, the latter leads to magnets with unconventionally large apertures. This requirement, combined with a 1.5 T bending field and rapid cycling operation results in a number of serious but not insurmountable challenges. In this paper, they discuss the design of the Proton Driver magnets and the rationale behind it.
Date: August 14, 2001
Creator: Mills, Jean-Francois Ostiguy and Frederick M.
Object Type: Article
System: The UNT Digital Library
Physics of Compact Advanced Stellarators (open access)

Physics of Compact Advanced Stellarators

Compact optimized stellarators offer novel solutions for confining high-beta plasmas and developing magnetic confinement fusion. The 3-D plasma shape can be designed to enhance the MHD stability without feedback or nearby conducting structures and provide drift-orbit confinement similar to tokamaks. These configurations offer the possibility of combining the steady-state low-recirculating power, external control, and disruption resilience of previous stellarators with the low-aspect ratio, high beta-limit, and good confinement of advanced tokamaks. Quasi-axisymmetric equilibria have been developed for the proposed National Compact Stellarator Experiment (NCSX) with average aspect ratio 4-4.4 and average elongation of approximately 1.8. Even with bootstrap-current consistent profiles, they are passively stable to the ballooning, kink, vertical, Mercier, and neoclassical-tearing modes for beta > 4%, without the need for external feedback or conducting walls. The bootstrap current generates only 1/4 of the magnetic rotational transform at beta = 4% (the rest is from the coils), thus the equilibrium is much less nonlinear and is more controllable than similar advanced tokamaks. The enhanced stability is a result of ''reversed'' global shear, the spatial distribution of local shear, and the large fraction of externally generated transform. Transport simulations show adequate fast-ion confinement and thermal neoclassical transport similar to equivalent tokamaks. …
Date: August 14, 2001
Creator: Zarnstorff, M. C.; Berry, L. A.; Brooks, A.; Fredrickson, E.; Fu, G. Y.; Hirshman, S. et al.
Object Type: Report
System: The UNT Digital Library
UPS CNG Truck Fleet Start Up Experience: Alternative Fuel Truck Evaluation Project (open access)

UPS CNG Truck Fleet Start Up Experience: Alternative Fuel Truck Evaluation Project

UPS operates 140 Freightliner Custom Chassis compressed natural gas (CNG)-powered vehicles with Cummins B5.9G engines. Fifteen are participating in the Alternative Fuel Truck Evaluation Project being funded by DOE's Office of Transportation Technologies and the Office of Heavy Vehicle Technologies.
Date: August 14, 2001
Creator: Walkowicz, K.
Object Type: Book
System: The UNT Digital Library
Report of the Snowmass M6 Working Group on High Intensity Proton Sources (open access)

Report of the Snowmass M6 Working Group on High Intensity Proton Sources

The M6 working group had more than 40 active participants (listed in Section 4). During the three weeks at Snowmass, there were about 50 presentations, covering a wide range of topics associated with high intensity proton sources. The talks are listed in Section 5. This group also had joint sessions with a number of other working groups, including E1 (Neutrino Factories and Muon Colliders), E5 (Fixed-Target Experiments), M1 (Muon Based Systems), T4 (Particle Sources), T5 (Beam dynamics), T7 (High Performance Computing) and T9 (Diagnostics). The M6 group performed a survey of the beam parameters of existing and proposed high intensity proton sources, in particular, of the proton drivers. The results are listed in Table 1. These parameters are compared with the requirements of high-energy physics users of secondary beams in Working Groups E1 and E5. According to the consensus reached in the E1 and E5 groups, the U.S. HEP program requires an intense proton source, a 1-4 MW Proton Driver, by the end of this decade.
Date: August 14, 2001
Creator: Chou, W. & Wei, J.
Object Type: Report
System: The UNT Digital Library
New experimental results in proton radioactivity (open access)

New experimental results in proton radioactivity

A review of experimental data obtained recently on proton-radioactive nuclei is presented. The highlights include the observation of fine structure in proton emission, for the decays of {sup 131}Eu, {sup 145}Tm and {sup 145}Tm, and the studies of the excited states in proton-emitting nuclei. The observation limits are extended to few nanobarns cross sections ({sup 140}Ho, {sup 164}In and {sup 130}Eu) and few microsecond half-lives (e.g. {sup 145}Tm). Measured decay properties for thirty nine proton-emitting ground and isomeric states contributed to the understanding of nuclear masses and evolution of single-particle states at and beyond the proton drip-line. Experimental results have stimulated new theoretical approaches to proton emission and the structure of unbound narrow resonance states.
Date: August 14, 2001
Creator: Rykaczewski, K. P.
Object Type: Article
System: The UNT Digital Library
A holistic look at minimizing adverse environmental impact under section 316(b) of the clean water act. (open access)

A holistic look at minimizing adverse environmental impact under section 316(b) of the clean water act.

None
Date: August 14, 2001
Creator: Veil, J. A.; Puder, M. G.; Littleton, D. J. & Johnson, N.
Object Type: Article
System: The UNT Digital Library
Physics with Heavy Neutron-Rich RIBs at the HRIBF* (open access)

Physics with Heavy Neutron-Rich RIBs at the HRIBF*

The Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge is the first ISOL-type facility to provide beams of accelerated radioactive fission products. To generate these beams, products of fission induced by proton bombardment of a uranium carbide target are ionized, charge-exchanged in Cs vapor, and injected into the HRIBF tandem. Using a single stripper foil in the terminal, they can be accelerated to about 3 MeV per nucleon, ideal for Coulomb Excitation studies. Alternatively, they can be accelerated to energies above the Coulomb barrier by means of double-stripping, at the expense of a factor of about five in lost beam intensity. This paper reports on recent experiments using neutron-rich radioactive ion beams (RIBs) from the HRIBF facility. They have performed Coulomb excitation measurements of B(E2; 0{sup +} {yields} 2{sup +}) in {sup 126,128}Sn and {sup 132,134,136}Te, neutron transfer to single-particle states in {sup 135}Te, and fusion-evaporation reactions on light targets to study evaporation residues with {gamma}-{gamma}-recoil coincidence spectroscopy.
Date: August 14, 2001
Creator: Radford, D.C.
Object Type: Article
System: The UNT Digital Library
Democratic Republic of the Congo: Peace Process and Background (open access)

Democratic Republic of the Congo: Peace Process and Background

The purpose of this report is to review the status of the Democratic Republic of the Congo peace process, provide background on recent conflicts in the Congo; briefly summarize the political history that led to these conflicts; and assess prospects for the future. U.S. Congo policy and congressional involvement are also described.
Date: August 14, 2001
Creator: Copson, Raymond W.
Object Type: Report
System: The UNT Digital Library