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[Letter from Campbell B. Read to Station Manager of KVTT-FM 91.7, "Request for Equal Time" - May 14, 1983]

Description: Letter from Campbell B. Read, Ph.D. to the Station Manager of the Christian radio station KVTT 91.7 FM in Dallas. Dr. Read is requesting equal time to respond to certain claims made by Dr. Paul Cameron, Dr. Clem Mueller, and a vice officer of the Dallas Police Department on the "Point of View" talk radio program on May 13, 1983. The topic of the talk show was the health aspects of homosexual behavior. Read writes that the Federal Communications Commission requires that radio stations give equal time for rebuttal if "questionable, if not slanderous, statements are made about [minority] groups". Read, who holds a Ph. D. in Statistics, challenges the claims made by the guests on the talk show and claims that their comments about the gay community were indeed slanderous.
Date: May 14, 1983
Creator: Read, Campbell B.
Partner: UNT Libraries Special Collections

Thermovoltaic in-situ mirror cell

Description: A photovoltaic cell used in a direct energy conversion generator for converting heat to electricity includes a reflective layer disposed within the cell between the active layers of the cell and the cell substrate. The reflective layer reflects photons of low energy back to a photon producing emitter for reabsorption by the emitter, or reflects photons with energy greater than the cell bandgap back to the cell active layers for conversion into electricity. The reflective layer can comprise a reflective metal such as gold while the substrate can comprise a heavily doped silicon or a metal.
Date: December 31, 1995
Creator: Campbell, B.C.
Partner: UNT Libraries Government Documents Department

Los Alamos Hot-Cell-Facility modifications for examining FFTF fuel pins

Description: Commissioned in 1960, the Wing 9 Hot Cell Facility at Los Alamos was recently modified to meet the needs of the 1980s. Because fuel pins from the Fast Flux Test Facility (FFTF) at the Hanford Engineering Development Laboratory (HEDL) are too long for examination in the original hot cells, we modified cells to accommodate longer fuel pins and to provide other capabilities as well. For instance, the T-3 shipping cask now can be opened in an inert atmosphere that can be maintained for all nondestructive and destructive examinations of the fuel pins. The full-length pins are visually examined and photographed, the wire wrap is removed, and fission gas is sampled. After the fuel pin is cropped, a cap is seal-welded on the section containing the fuel column. This section is then transferred to other cells for gamma-scanning, radiography, profilometry, sectioning for metallography, and chemical analysis.
Date: January 1, 1982
Creator: Campbell, B.M. & Ledbetter, J.M.
Partner: UNT Libraries Government Documents Department

LEB tuner made out of titanium alloy

Description: A proposed design of a closed shell tuner for the LEB cavity is presented. The tuner is made out of Ti alloy which has a high electrical resistivity as well as very good mechanical strength. Using this alloy results in a substantial reduction in the eddy current heating as well as allowing for faster frequency control. 9 figs.
Date: September 1, 1991
Creator: Goren, Y. & Campbell, B.
Partner: UNT Libraries Government Documents Department

In situ vitrification of soil from the Savannah River Site

Description: Contamination associated with seepage basins and other underground structures at US Department of Energy sites may be effectively remediated by application of in situ vitrification (ISV) technology. In situ vitrification converts contaminated soil and buried wastes into a glass and crystalline block, similar to obsidian commingled with crystalline phases. Two bench-scale tests performed at Pacific Northwest Laboratory (PNL) in September 1989 demonstrated the feasibility of applying ISV to seepage basin soils at the Savannah River Site (SRS) in South Carolina. The two tests were performed on soils spiked with heavy metal and organic contaminants as well as stable radioactive simulants. These soils contain extremely low concentrations of alkali fluxes such as sodium and potassium oxides, which are necessary charge carriers for the ISV process. Tests performed on the low flux-containing soil indicate the soil can be vitrified with special application of the ISV process. Tests showed the hazardous and radioactive simulants were successfully bound in the vitrified product and the organics were mostly destroyed. Additional larger scale testing and evaluation are recommended to further study the feasibility of treating contaminated SRS soil by the ISV process. 13 refs., 12 figs., 7 tabs.
Date: August 1, 1990
Creator: Campbell, B.E. & Buelt, J.L.
Partner: UNT Libraries Government Documents Department

Evaluation of Hanford dissolver capability

Description: Over the past two years a number of programs have been initiated that have introduced several variables to the production scene which can significantly influence Hanford dissolver capacity. The more important of these are the utilization of recovered acid for dissolution, the development of I and E fuel elements, and the advent of direct-casting methods for fuel element fabrication (dingot metal). Evaluation of the relative status of dissolution capability with potential production requirements has as a result become somewhat more complex due to the increasing difficulty of weighing the effects of the various parameters involved. It is the purpose of this report to present most of the details, relevent to dissolver operation, that are necessary for capacity evaluation, and from which conclusions as to dissolver adequacy can be drawn with reasonable confidence.
Date: April 4, 1964
Creator: Campbell, B. F.
Partner: UNT Libraries Government Documents Department

Production data on 0.55 eV InGaAs thermophotovoltaic cells

Description: Low bandgap 0.55 eV (2.25 {micro}m cutoff wavelength) indium gallium arsenide (In{sub 0.72}Ga{sub 0.28}As) thermophotovoltaic (TPV) cells use much more of the long wavelength energy emitted from low temperature (< 1,200 C) thermal sources than either Si or GaSb cells. Data are presented on a statistically significant number (2,500) of these TPV cells, indicating the performance obtainable in large numbers of cells. This data should be useful in the design and modeling of TPV system performance. At 1.2 A/cm{sup 2} short-circuit current, an average open-circuit voltage of 283 mV is obtained with a 60% fill factor. The peak external quantum efficiency for uncoated cells is 65% and is over 50% from 1.1 to 2.2 {micro}m. Internal quantum efficiency is over 76% in this range assuming an estimated 34% reflectance loss.
Date: May 1, 1996
Creator: Wojtzuk, S.; Colter, P.; Charache, G. & Campbell, B.
Partner: UNT Libraries Government Documents Department

High intensity proton linac activities at Los Alamos

Description: High-current proton linear accelerators offer an attractive alternative for generating the intense neutron fluxes needed for transmutations technologies, tritium production and neutron science. To achieve the fluxes required for tritium production, a 100-mA, 1700-MeV cw proton accelerator is being designed that uses superconducting cavities for the high-energy portion of the linac, from 211 to 1,700 MeV. The development work supporting the linac design effort is focused on three areas: superconducting cavity performance for medium-beta cavities at 700 MHz, high power rf coupler development, and cryomodule design. An overview of the progress in these three areas is presented.
Date: September 1, 1998
Creator: Rusnak, B.; Chan, K.C. & Campbell, B.
Partner: UNT Libraries Government Documents Department

A tube-in-tube thermophotovoltaic generator

Description: A thermophotovoltaic device includes at least one thermal radiator tube, a cooling tube concentrically disposed within each thermal radiator tube and an array of thermophotovoltaic cells disposed on the exterior surface of the cooling tube. A shell having a first end and a second end surrounds the thermal radiator tube. Inner and outer tubesheets, each having an aperture corresponding to each cooling tube, are located at each end of the shell. The thermal radiator tube extends within the shell between the inner tubesheets. The cooling tube extends within the shell through the corresponding apertures of the two inner tubesheets to the corresponding apertures of the two outer tubesheets. A plurality of the thermal radiator tubes can be arranged in a staggered or an in-line configuration within the shell.
Date: December 31, 1996
Creator: Ashcroft, J.; Campbell, B. & Depoy, D.
Partner: UNT Libraries Government Documents Department

Underground tank vitrification: Engineering-scale test results

Description: Contamination associated with underground tanks at US Department of Energy sites and other sites may be effectively remediated by application of in situ vitrification (ISV) technology. In situ vitrification converts contaminated soil and buried wastes such as underground tanks into a glass and crystalline block, similar to obsidian with crystalline phases. A radioactive engineering-scale test performed at Pacific Northwest Laboratory in September 1989 demonstrated the feasibility of using ISV for this application. A 30-cm-diameter (12-in.-diameter) buried steel and concrete tank containing simulated tank sludge was vitrified, producing a solid block. The tank sludge used in the test simulated materials in tanks at Oak Ridge National Laboratory. Hazardous components of the tank sludge were immobilized or removed and captured in the off-gas treatment system. The steel tank was converted to ingots near the bottom of the block and the concrete walls were dissolved into the resulting glass and crystalline block. Although one of the four moving electrodes froze&#x27;&#x27; in place about halfway into the test, operations were able to continue. The test was successfully completed and all the tank sludge was vitrified. 7 refs., 12 figs., 5 tabs.
Date: June 1, 1990
Creator: Campbell, B.E.; Timmerman, C.L. & Bonner, W.F.
Partner: UNT Libraries Government Documents Department

In situ vitrification of a mixed radioactive and hazardous waste site

Description: A large-scale test of the in situ vitrification (ISV) process was performed on a mixed radioactive and hazardous-chemical contaminated waste site on the Hanford Site in southeastern Washington State. A mixed-waste site was selected for this large-scale test to demonstrate the applicability of ISV to mixed wastes common to many US Department of Energy (DOE) sites. In situ vitrification is a thermal process that converts contaminated soil into a durable, leach-resistant product. Electrodes are inserted into the ground. The goals of the test are to demonstrate at least 99% retention of fission products and hazardous metals in the ISV glass during the test; demonstrate the ability of the ISV off-gas treatment system to process a waste site containing significant quantities of combustible material and demonstrate the ability of ISV to vitrify the site to a depth of 20 ft or greater. The test was completed in April 1990. 5 figs.
Date: November 1, 1990
Creator: Campbell, B.E. & Koegler, S.S.
Partner: UNT Libraries Government Documents Department

Application of DOE prescribed guides to the evaluation of Hanford`s Mixed Low Level Solid Waste Treatment Options

Description: A recent Westinghouse Hanford Company report (WHC-SD-W100-ES-008, February, 1994), compared a Vitrification process to the WRAP-2A Grout/PE process for the treatment of Mixed Low Level Waste (MLLW). This comparison applied a limited scope numerical evaluation to compare technology complexity of the two processes, but focused primarily on capital and operating costs. The work reported here is supplementary to WHC-SD-Wl00-ES-008. It provides a record of the application of the more formal DOE-prescribed criteria (Treatment Selection Guides for Federal Facility Compliance Act Draft Site Treatment Plans) to the Vitrification and Grout/PE processes previously evaluated. Results of the evaluation favored the Grout/PE process by a weighted score of 83 to 78 over the Plasma arc vitrification process.
Date: October 1, 1994
Creator: Campbell, B. F. & Nash, C. R.
Partner: UNT Libraries Government Documents Department

MBE growth of GaInAsSb p/n junction diodes for thermophotovoltaic applications

Description: This paper reports recent progress in the development of quaternary III-V thermophotovoltaic (TPV) devices based on MBE grown Ga{sub x}In{sub 1{minus}x}As{sub y}Sb{sub 1{minus}y}. TPV is of great interest for a variety of applications. The objective of this work is to develop a TPV cell which is tunable to the emission spectrum of a heated blackbody, at temperatures in the range of 1200--1473 K. One aspect of this tuning is to match the band gap, E{sub gap}, of the photovoltaic device to the peak output of the heat source., An advantage of the quarternary III-V semiconductor systems is that devices can be fabricated by molecular beam epitaxy on a suitable binary substrate, such as GaSb or InAs, and the band gap and lattice constant can be adjusted more or less independently, to match requirements. Quarternary cells, with band-gaps in the 0.5 to 0.72 eV range, have been fabricated and tested. For 0.54 eV devices the authors obtained V{sub oc} = 0.3 V and I{sub sc} = 1.5 amperes/cm{sup 2} under infrared illumination of a 1200 K blackbody. Under high illumination levels the V{sub oc} and I{sub sc} ranged from 0.5 V at 3 amperes/cm{sup 2} for 0.72 eV devices to 0.31 V at 1.2 amperes/cm{sup 2} for 0.5 eV devices, indicating good photovoltaic device characteristics over the range of bandgaps. The diode ideality factor for 0.54 eV devices ranged from 2.45 at low illumination indicating tunneling-dominated dark current, to 1.7 at high illumination intensity indicating recombination-generation dominated dark currents.
Date: August 1, 1996
Creator: Uppal, P.N.; Charache, G.; Baldasaro, P.; Campbell, B.; Loughin, S.; Svensson, S. et al.
Partner: UNT Libraries Government Documents Department

Engineering development of superconducting RF linac for high-power applications

Description: High-power proton linacs are a promising source of neutrons for material processing and research applications. Superconducting radiofrequency (SCRF) Rf linac technology is preferred for such applications because of power efficiency. A multi-year engineering development program is underway at Los Alamos National Laboratory to demonstrate the required SCRF technology. The program consists of development of SC cavities, power couplers, and cryomodule integration. Prototypes will be built and operated to obtain performance and integration information, and for design improvement. This paper describes the scope and present status of the development program.
Date: December 31, 1998
Creator: Dominic Chan, K.C.; Rusnak, B.; Gentzlinger, R.C.; Campbell, B.M.; Kelley, J.P. & Safa, H.
Partner: UNT Libraries Government Documents Department

Design of an accelerating cavity for the Superconducting Super Collider Low-Energy Booster

Description: This paper presents the history and current status of the design of the accelerator cavity to be incorporated into the Low-Energy Booster (LEB) of the Superconducting Super Collider (SSC). The LEB is a proton synchrotron, 540 meters in circumference, and having 108 buckets around the ring. Acceleration programs, each 50 msec long, take place at a rate of 10 per second. The beta change of the particles from injection to extraction is from 0.8 to 0.997. Since the rf excitation frequency must track beta, the rf frequency must shift from 47.5 to 60 MHz over the 50-msec acceleration program. The cavity will use ferrite in a perpendicular control bias mode to effect the require tuning. 4 refs., 1 fig.
Date: January 1, 1991
Creator: Friedrichs, C.C.; Walling, L. (Los Alamos National Lab., NM (USA)) & Campbell, B.M. (Superconducting Super Collider Lab., Dallas, TX (USA))
Partner: UNT Libraries Government Documents Department

A flight-qualified RFQ for the BEAR project

Description: A 1-MeV, 30-mA, low-duty factor, 425-MHz RFQ has been designed and constructed for the BEAR (Beam Experiments Aboard a Rocket) Project by Los Alamos National Laboratory, Grumman Space Systems Division and GAR Electroformers. The design of this 1-m-long lightweight (<55-kg) accelerator is unique in that it was constructed of four copper-plated aluminum quadrants joined longitudinally by a room- temperature electroforming process to produce a monolithic structure. There are no rf, vacuum, or mechanical joints in the vane/cavity region of the accelerator. As part of the design/fabrication process, spark-test, cold, and engineering model RFQs were constructed and tested. The completed flight unit has successfully passed static structural and thermal tests as well as dynamic structural (shake) tests according to the launch, separation, and flight specifications. In addition, the rf field distributions and beam-transport characteristics have been measured and found to satisfy the design requirements. 12 refs., 2 figs., 3 tabs.
Date: January 1, 1988
Creator: Schrage, D.; Young, L.; Campbell, B.; Billen, J.H.; Wangler, T.; Stovall, J. et al.
Partner: UNT Libraries Government Documents Department

Current status of low-temperature radiator thermophotovoltaic devices

Description: The current performance status of low-temperature radiator (< 1,000 C) thermophotovoltaic (TPV) devices is presented. For low-temperature radiators, both power density and efficiency are equally important in designing an effective TPV system. Comparisons of 1 cm x 1 cm, 0.55 eV InGaAs and InGaAsSb voltaic devices are presented. Currently, InGaAs lattice-mismatched devices offer superior performance in comparison to InGaAsSb lattice-matched devices, due to the former`s long-term development for numerous optoelectronic applications. However, lattice-matched antimony-based quaternaries offer numerous potential advantages.
Date: May 1, 1996
Creator: Charache, G.W.; Egley, J.L.; Danielson, L.R.; DePoy, D.M.; Baldasaro, P.F.; Campbell, B.C. et al.
Partner: UNT Libraries Government Documents Department

Progress of APT superconducting linac engineering development

Description: The authors initiated a program to develop superconducting (SC) RF for high-power proton linacs. These linacs are useful in accelerator-driven transmutation technologies and the Accelerator Production of Tritium (APT) Project. They are developing multicell niobium cavities with elliptical-cell shapes at 700 MHz. These cavities, unlike most elliptical cavities for electron accelerators, are designed to accelerate protons at {beta}<1. Coaxial power couplers are being developed to transmit high (250 kW) CW RF power to the cavities. The couplers will be tested both at ambient temperature and at cryogenic temperature (2K). Their power handling and thermal properties will be measured. The cavities and power couplers will be integrated into a prototype cryomodule. The cryomodule will be tested and characterized with RF under cryogenic conditions required for a high-power proton linac. This paper describes the status of this program.
Date: December 31, 1998
Creator: Chan, K.C.D.; Campbell, B.M.; Gentzlinger, R.C.; Balleyguier, P.; Waynert, J.A.; Haynes, W.B. et al.
Partner: UNT Libraries Government Documents Department

BEAR RFQ: Beam Experiment Aboard a Rocket

Description: Los Alamos National Laboratory, Grumman, and GAR Electroformers have completed the design and fabrication of an electroformed RFQ for the BEAR (Beam Experiments Aboard a Rocket) project. The design of this 1-m-long, lightweight (<55 kg) accelerator incorporates four aluminum vane/cavity quadrants joined by an electroforming process. With the vane and cavity fabricated as a monolithic structure, there are no mechanical rf, vacuum, or structural joints. The completed BEAR RFQ has successfully passed flight qualification and beam transport tests in preparation for the flight, which is scheduled for March 1989. 12 refs., 5 figs., 1 tab.
Date: January 1, 1988
Creator: Schrage, D.; Young, L.M.; Campbell, B.M.; Billen, J.H.; Stovall, J.; Martinez, F.A. et al.
Partner: UNT Libraries Government Documents Department

Basic Research Needs for the Hydrogen Economy. Report of the Basic Energy Sciences Workshop on Hydrogen Production, Storage and Use, May 13-15, 2003

Description: The coupled challenges of a doubling in the world's energy needs by the year 2050 and the increasing demands for ''clean'' energy sources that do not add more carbon dioxide and other pollutants to the environment have resulted in increased attention worldwide to the possibilities of a ''hydrogen economy'' as a long-term solution for a secure energy future.
Date: February 1, 2004
Creator: Dresselhaus, M; Crabtree, G.; Buchanan, M.; Mallouk, T.; Mets, L.; Taylor, K. et al.
Partner: UNT Libraries Government Documents Department

Basic Research Needs for Materials Under Extreme Environments. Report of the Basic Energy Sciences Workshop on Materials Under Extreme Environments, June 11-13, 2007

Description: To evaluate the potential for developing revolutionary new materials that will meet demanding future energy requirements that expose materials to environmental extremes.
Date: February 1, 2008
Creator: Wadsworth, J.; Crabtree, G. W.; Hemley, R. J.; Falcone, R.; Robertson, I.; Stringer, J. et al.
Partner: UNT Libraries Government Documents Department

Geant4-based Simulation Study of PEP-II Beam Backgrounds in the BABAR Detector at the SLAC B-Factory

Description: To improve the understanding of accelerator-induced backgrounds at the SLAC B-Factory, we simulate lost particle backgrounds in the BABAR detector originating from beam-gas interactions and radiative Bhabha scatters. We have extended the GEANT4-based BABAR detector simulation to include beam-line components and magnetic fields up to 8.5 m away from the interaction point. We describe the simulation model and then compare preliminary predicted background levels with measurements from dedicated single- and colliding-beam experiments.
Date: June 7, 2005
Creator: Lockman, W.S.; /UC, Santa Cruz; Kozanecki, W.; /DAPNIA, Saclay; Campbell, B.; Robertson, S.H. et al.
Partner: UNT Libraries Government Documents Department