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Estimated risk from exposure to radon decay products in US homes

Description: Recent analyses now permit direct estimation of the risks of lung cancer from radon decay products in US homes. Analysis of data from indoor monitoring in single-family homes yields a tentative frequency distribution of annual-average /sup 222/Rn concentrations averaging 55 Bq m/sup -3/ and having 2% of homes exceeding 300 Bq m/sup -3/. Application of the results of occupational epidemiological studies, either directly or using recent advances in lung dosimetry, to indoor exposures suggests tha… more
Date: May 1, 1986
Creator: Nero, A.V. Jr.
Partner: UNT Libraries Government Documents Department
open access

Experiments and prospects for induction linac drivers

Description: In the last three years, the US program in Heavy Ion Fusion has concentrated on understanding the induction linac approach to a power-plant driver. In this method it is important that the beam current be maximized throughout the accelerator. Consequently, it is crucial to understand the space-charge limit in the AG transport system in the linac and, also, to achieve current amplification during acceleration to keep pace with the kinematical increase of this limit with energy. Experimental resul… more
Date: May 1, 1986
Creator: D., Keefe
Partner: UNT Libraries Government Documents Department
open access

Future accelerator technology

Description: A general discussion is presented of the acceleration of particles. Upon this foundation is built a categorization scheme into which all accelerators can be placed. Special attention is devoted to accelerators which employ a wake-field mechanism and a restricting theorem is examined. It is shown how the theorem may be circumvented. Comments are made on various acceleration schemes.
Date: May 1, 1986
Creator: Sessler, Andrew M.
Partner: UNT Libraries Government Documents Department
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Anti p-nucleus interaction

Description: Status and future prospects of antiproton-nucleus scattering experiments are presented. These scattering experiments were conducted at antiproton beam momentums of 300 and 600 MeV/c on target nuclei of /sup 6/Li, /sup 12/C, /sup 16/O, /sup 18/O, /sup 40/Ca, /sup 48/Ca, and /sup 208/Pb. Antiproton-proton reactions investigated antiproton-nucleus bound or resonant states in antiproton reactions with d, /sup 6/Li, /sup 12/C, /sup 63/Cu, and /sup 209/Bi. Inelastic scattering experiments investigate… more
Date: May 1, 1986
Creator: Peng, J.C.
Partner: UNT Libraries Government Documents Department
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Large-scale high-efficiency air stripper and recovery well network for removing volatile organic chlorocarbons from ground water

Description: The Savannah River Plant (SRP) produces special nuclear materials for the US Government. Since 1958, chemical wastes generated by an aluminum forming/metal finishing process used to manufacture fuel and target assemblies were discharged to a settling basin. This process waste stream contained acids, alkalis, metals, and chlorinated degreasing solvents. In 1981, these solvents, specifically trichloroethylene and tetrachloroethylene, were discovered in monitor wells near the settling basin. A mon… more
Date: May 1, 1986
Creator: Boone, L F; Lorfenz, R; Muska, C F & Steele, J L
Partner: UNT Libraries Government Documents Department
open access

Description of a high temperature downhole fluid sampler

Description: Downhole fluid samplers have been used for years with limited success in high temperature geothermal wells. This paper discusses the development and operating principles of a high temperature downhole fluid sampler, reliable at obtaining samples at temperatures of up to 350/sup 0/C. The sampler was used successfully for recovering a brine sample from a depth of 10,200 ft in the Salton Sea Scientific Drilling Project well.
Date: May 1, 1986
Creator: Solbau, R.; Weres, O.; Hansen, L. & Dudak, B.
Partner: UNT Libraries Government Documents Department
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SLAC low emittance accelerator test facility

Description: SLAC is proposing to build a new Accelerator Test Facility (ATF) capable of producing a 50 MeV electron beam with an extremely low geometric tranverse emittance (1.5 x 10/sup -10/ rad.m) for the purpose of testing new methods of acceleration. The low emittance will be achieved by assembling a linear accelerator using one standard SLAC three-meter section and a 400 kV electron gun with a very small photocathode (40 microns in diameter). The photocathode will be illuminated from the back by short… more
Date: May 1, 1986
Creator: Loew, G. A.; Miller, R. H. & Sinclair, C. K.
Partner: UNT Libraries Government Documents Department
open access

Off-nadir optical remote sensing from satellites for vegetation identification

Description: Today's satellite remote sensing systems rely heavily on spectral signatures for scene identification from nadir observations. We propose to use angular signatures as complementary scene identifiers when off-nadir sensing is possible. Specifically, the hot spot (Heiligenschein) of plant canopies is recognized as an atmosphere-invariant angular reflectance signature that carries information about the plant stand architecture which may be useful for instant crop identification from off-nadir sate… more
Date: May 30, 1986
Creator: Gerstl, S.A.W.
Partner: UNT Libraries Government Documents Department
open access

Future e/sup +/e/sup -/ linear colliders and beam-beam effects

Description: Numerous concepts, ranging from conventional to highly exotic, hae been proposed for the acceleration of electrons and positrons to very high energies. For any such concept to be viable, it must be possible to produce from it a set of consistent parameters for one of these ''benchmark'' machines. Attention is directed to the choice of parameters for a collider in the 300 GeV energy range, operating at a gradient on the order of 200 MV/m, using X-band power sources to drive a conventional disk-l… more
Date: May 1, 1986
Creator: Wilson, Perry B.
Partner: UNT Libraries Government Documents Department
open access

Present optics options for TeV colliders

Description: A practical approach for implementing TeV collider optics with high luminosities pounds approx. = 10/sup 33/ (cm/sup 2/ s)/sup -1/ but without large pinch effects is given using current alternatives. Characteristics are considered that constrain the optics and the types and orders of magnets required. A modified linac FoDo cell based on permanent magnet hybrid quadrupoles is discussed. Similarly, a demagnifying, permanent magnet telescopic system that allows variation of beta, eta and energy is… more
Date: May 1, 1986
Creator: Spencer, J.E.
Partner: UNT Libraries Government Documents Department
open access

Canopy hot-spot as crop identifier

Description: Illuminating any reflective rough or structured surface by a directional light source results in an angular reflectance distribution that shows a narrow peak in the direction of retro-reflection. This is called the Heiligenschein or hot-spot of vegetation canopies and is caused by mutual shading of leaves. The angular intensity distribution of the hot-spot, its brightness and slope, are therefore indicators of the plant's geometry. We propose the use of hot-spot characteristics as crop identifi… more
Date: May 1, 1986
Creator: Gerstl, S. A. W.; Simmer, C. & Powers, B. J.
Partner: UNT Libraries Government Documents Department
open access

ALT-I Pump Limiter Experiments With ICRF Heating on TEXTOR. Revision.

Description: The ALT-I (Advanced Limiter Test-I) was installed on TEXTOR to benchmark the ability of a pump limiter as an efficient particle collector and to determine the physics of pump limiter operation. Experiments continue to show its capability of removing particles from the plasma edge under different operating conditions. In this paper we report first experimental results using ALT-I in conjunction with high power ICRF heating. The particle removal rate increases as the edge flux and density increas… more
Date: May 1, 1986
Creator: Leung, W. K.; Goebel, D. M.; Conn, R. W.; Dippel, K. H.; Finken, K. H. & Thomas, G. J.
Partner: UNT Libraries Government Documents Department
open access

ALT-I Pump Limiter Experiments With ICRF Heating on TEXTOR

Description: The ALT-I (Advanced Limiter Test-I) was installed on TEXTOR to benchmark the ability of a pump limiter as an efficient particle collector and to determine the physics of pump limiter operation. Experiments continue to show its capability of removing particles from the plasma edge under different operating conditions. In this paper we report first experimental results using ALT-I in conjunction with high power ICRF heating. The particle removal rate increases as the edge flux and density increas… more
Date: May 1, 1986
Creator: Leung, W. K.; Goebel, D. M.; Conn, R. W.; Dippel, K. H.; Finken, K. H. & Thomas, G. J.
Partner: UNT Libraries Government Documents Department
open access

Lamb Shift in Heliumlike Uranium (U/sup 90 +/)

Description: We report a preliminary value of the Lamb shift in two-electron heliumlike U/sup 90 +/ of 69.1 (8.0) eV which is in agreement with the theoretical value of 75 eV for the one-electron Lamb shift at Z = 92. 8 refs., 2 figs.
Date: May 1, 1986
Creator: Munger, C. & Gould, H.
Partner: UNT Libraries Government Documents Department
open access

Standard method for economic analyses of inertial confinement fusion power plants

Description: A standard method for calculating the total capital cost and the cost of electricity for a typical inertial confinement fusion electric power plant has been developed. A standard code of accounts at the two-digit level is given for the factors making up the total capital cost of the power plant. Equations are given for calculating the indirect capital costs, the project contingency, and the time-related costs. Expressions for calculating the fixed charge rate, which is necessary to determine th… more
Date: May 30, 1986
Creator: Meier, W. R.
Partner: UNT Libraries Government Documents Department
open access

Beam dynamics, efficiency and power of the SLAC lasertron: simulation results

Description: Results are described for the computer simulation of the SLAC proof of principle lasertron device with a conventional single gap output cavity, using the 2D relativistic field and particle code called MASK. The rf to beam power efficiency is calculated for different power levels, dc voltages and optical pulse lengths. The calculated efficiency at the initial operating point of 50 MW beam power, 400 kV, and with 60 picosecond optical pulse duration, is 66%. The maximum rf power at 400 kV is abou… more
Date: May 1, 1986
Creator: Welch, J.J.
Partner: UNT Libraries Government Documents Department
open access

SLAC pulsed x-ray facility

Description: The Stanford Linear Accelerator Center (SLAC) operates a high energy (up to 33 GeV) linear accelerator delivering pulses up to a few microseconds wide. The pulsed nature of the electron beam creates problems in the detection and measurement of radiation both from the accelerator beam and the klystrons that provide the rf power for the accelerator. Hence, a pulsed x-ray facility has been built at SLAC mainly for the purpose of testing the response of different radiation detection instruments to … more
Date: May 1, 1986
Creator: Ipe, N.E.; McCall, R.C. & Baker, E.D.
Partner: UNT Libraries Government Documents Department
open access

Inertial fusion power for space applications

Description: More than thirty-seven design concepts have been proposed for terrestrial ICF power plants. The design space is large because of the many allowable driver and reaction chamber combinations. These design studies have illustrated advantages of ICF power plants over other sources in lower impact on the environment, high safety, and almost no dependence on consumables like fuel. The fact that, once built, a 1000 MW/sub e/ ICF power plant would require only 240 kg of deuterium and from 770 to 9260 k… more
Date: May 19, 1986
Creator: Meier, W. R.; Hogan, W. J.; Hoffman, N. J.; Murray, K. A. & Olson, R. E.
Partner: UNT Libraries Government Documents Department
open access

Recent developments of the LBL ECR ion source

Description: The performance of the LBL ECR has improved significantly since January 85 when the last ECR Ion Source Workshop was held in Berkeley. The 88-Inch Cyclotron began regular operation with the ECR source just prior to the workshop. Since then about 80% of the cyclotron operating schedule has been with the ECR source. The light-ion filament source is used only for runs two or more shifts in length using proton, /sup 3/He, or alpha beams. Occasionally the polarized ion source is used. The heavy-ion … more
Date: May 1, 1986
Creator: Lyneis, C.M.
Partner: UNT Libraries Government Documents Department
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Delta, iota and other meson spectroscopies

Description: This talk is given from the point of view of an experimentalist. Meson spectroscopy in the 1 to 3 GeV region is interesting because experiments exploring this region, in particular radiative psi decay, have found a rich structure of resonances too complicated to unravel with any one experiment, and not easily interpreted with any one theoretical model. None of the theoretical calculations predicting all kinds of interesting and exotic objects in this region is very convincing or reliable. Addit… more
Date: May 1, 1986
Creator: Lipkin, Harry J.
Partner: UNT Libraries Government Documents Department
open access

Unified formulation for linear accelerator design

Description: Expressions for peak and average powers required to produce a given average gradient in an accelerator section are given. They are valid for both lossy and lossless (superconducting) sections, for both traveling wave and standing wave sections, and for pulsed or continuous wave rf input. The expressions are given in terms of structure parameters that are equally applicable to traveling wave or standing wave. These parameters delineate the effect of wall losses and energy required to build up th… more
Date: May 1, 1986
Creator: Farkas, Z. D.
Partner: UNT Libraries Government Documents Department
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Deflection by the image current and charges of a beam scraper

Description: Scrapers are often used in storage rings and accelerators to clean the transverse profile of the beam. When the beam is not exactly midway between the jaws of the scraper the transverse electric and magnetic fields produced by the image charges and currents are asymmetric. For a relativistic beam traveling through a longitudinally uniform tube with infinitely conducting walls the transverse force from the electric field is canceled by the transverse force from the magnetic field. When an off-ce… more
Date: May 1, 1986
Creator: Bane, K. L. F. & Morton, P. L.
Partner: UNT Libraries Government Documents Department
open access

Physics overview of the Fermilab Low Energy Antiproton Facility Workshop

Description: A physics overview is presented of the Fermilab workshop to consider a possible high flux, low energy antiproton facility that would use cooled antiprotons from the accumulator ring of the Tevatron collider. Two examples illustrate the power of each a facility to produce narrow states at high rates. Physics topics to which such a facility may be applied are reviewed.
Date: May 1, 1986
Creator: Chanowitz, Michael S.
Partner: UNT Libraries Government Documents Department
open access

Materials erosion and redeposition studies at the PISCES-facility: net erosion under redeposition

Description: Simultaneous erosion and redeposition of copper and 304 stainless steel under controlled and continuous plasma (D,He,Ar) bombardment has been investigated in the PISCES-facility, which generates typical edge-plasma conditions of magnetic fusion devices. The plasma bombardment conditions are: incident ion flux in the range from 10/sup 17/ to 10/sup 18/ ions/sec/cm/sup 2/, ion bombarding energy of 100 eV, electron temperature in the range from 5 to 15 eV, plasma density in the range from 10/sup 1… more
Date: May 1, 1986
Creator: Hirooka, Y.; Goebel, D. M.; Conn, R. W.; Leung, W. K. & Campbell, G. A.
Partner: UNT Libraries Government Documents Department
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