Mechanical design of a heavy-ion RFQ (open access)

Mechanical design of a heavy-ion RFQ

The mechanical design and construction of a 199.3 MHz heavy ion RFQ for charge states q/A as low as 0.14 is described. The vane supports and positioning adjustments are significant features of this design. They provide the capability of achieving the precision vane alignment required. The maximum difference between calculated and measured apertures between the vanes is 0.0035 inches, and the average difference is 0.0010 inches. Various important aspects of the design and construction including material selection and plating, RF joints, thermal loading and vacuum system are described. Assembly techniques, methods of mechanical measurement, alignment and structure stability are discussed in detail.
Date: March 1, 1983
Creator: Abbott, S.; MacGill, R. & Yourd, R.
Object Type: Article
System: The UNT Digital Library
Preliminary investigation of interconnected systems interactions for the safety injection system of Indian Point-3 (open access)

Preliminary investigation of interconnected systems interactions for the safety injection system of Indian Point-3

The rich diversity of ideas and techniques for analyzing interconnected systems interaction has presented the NRC with the problem of identifying methods appropriate for their own review and audit. This report presents the findings of a preliminary study using the Digraph Matrix Analysis method to evaluate interconnected systems interactions for the safety injection system of Indian Point-3. The analysis effort in this study was subjected to NRC constraints regarding the use of Boolean logic, the construction of simplified plant representations or maps, and the development of heuristic measures as specified by the NRC. The map and heuristic measures were found to be an unsuccessful approach. However, from the effort to model and analyze the Indian Point-3 safety injection system, including Boolean logic in the model, singleton and doubleton cut-sets were identified. It is recommended that efforts excluding Boolean logic and utilizing the NRC heuristic measures not be pursed further and that the Digraph Matrix approach (or other comparable risk assessment technique) with Boolean logic included to conduct the audit of the Indian Point-3 systems interaction study.
Date: March 4, 1983
Creator: Alesso, H.P.; Lappa, D.A.; Smith, C.F. & Sacks, I.J.
Object Type: Report
System: The UNT Digital Library
Relativistic uranium beams - the Bevalac experience (open access)

Relativistic uranium beams - the Bevalac experience

This paper will address areas where relativistic heavy ion accelerators differ from proton facilities. Salient areas are: (1) the specialized injectors for heavy ions; ion sources, structures for very low charge-to-mass ratio (q/A) ions, and stripper optimization; (2) special requirements for the synchrotron ring; ultrahigh vacuum, flexible controls and instrumentation. These areas are discussed in the context of the Bevalac, as well as our idea for a next-generation relativistic heavy ion accelerator.
Date: March 1, 1983
Creator: Alonso, J.
Object Type: Article
System: The UNT Digital Library
Depth to and Concentrations of Water in Large Bodies of Silicic Magma. Progress Report, July 1, 1982-June 30, 1983 (open access)

Depth to and Concentrations of Water in Large Bodies of Silicic Magma. Progress Report, July 1, 1982-June 30, 1983

Large bodies of silicic magma are potential sources of geothermal energy and ore. They also pose threats of catastrophic eruptions. The depths of such bodies are related to their economic potential and probably to their eruption mechanisms. The concentrations of water in the magmas are important for their eruptive and dynamical behavior and for the development of ores. Estimates of viscosity and density of melt require knowledge of concentration of water. The concentration of water in melt before ascent and eruption can be measured in inclusions of glass which became trapped in crystals before extrusion. The depth of a magma body can be estimated or delimited if we can find out the concentrations of both carbon dioxide and water in the inclusions of glass. Initial results on the Bishop Tuff of Long Valley Caldera, California yield 4.9 +- 0.5 percent H/sub 2/O for glass included in quartz from the Plinian air fall pumice. This result is comparable to the estimates of Hildreth (1977) of about 3.5 to 4.9 percent H/sub 2/O in the lowermost part of the Bishop ash flow. From January 1982 through December 1982, analyses of inclusions of glass in two additional quartz phenocrysts from the Plinian air …
Date: March 3, 1983
Creator: Anderson, A. T.
Object Type: Report
System: The UNT Digital Library
Space reactor electric systems: system integration studies, Phase 1 report (open access)

Space reactor electric systems: system integration studies, Phase 1 report

This report presents the results of preliminary space reactor electric system integration studies performed by Rockwell International's Energy Systems Group (ESG). The preliminary studies investigated a broad range of reactor electric system concepts for powers of 25 and 100 KWe. The purpose of the studies was to provide timely system information of suitable accuracy to support ongoing mission planning activities. The preliminary system studies were performed by assembling the five different subsystems that are used in a system: the reactor, the shielding, the primary heat transport, the power conversion-processing, and the heat rejection subsystems. The subsystem data in this report were largely based on Rockwell's recently prepared Subsystem Technology Assessment Report. Nine generic types of reactor subsystems were used in these system studies. Several levels of technology were used for each type of reactor subsystem. Seven generic types of power conversion-processing subsystems were used, and several levels of technology were again used for each type. In addition, various types and levels of technology were used for the shielding, primary heat transport, and heat rejection subsystems. A total of 60 systems were studied.
Date: March 29, 1983
Creator: Anderson, R. V.; Bost, D.; Determan, W. R.; Harty, R. B.; Katz, B.; Keshishian, V. et al.
Object Type: Report
System: The UNT Digital Library
Space-reactor electric systems: subsystem technology assessment (open access)

Space-reactor electric systems: subsystem technology assessment

This report documents the subsystem technology assessment. For the purpose of this report, five subsystems were defined for a space reactor electric system, and the report is organized around these subsystems: reactor; shielding; primary heat transport; power conversion and processing; and heat rejection. The purpose of the assessment was to determine the current technology status and the technology potentials for different types of the five subsystems. The cost and schedule needed to develop these potentials were estimated, and sets of development-compatible subsystems were identified.
Date: March 29, 1983
Creator: Anderson, R.V.; Bost, D. & Determan, W.R.
Object Type: Report
System: The UNT Digital Library
Detecting heavy flavors at CBA (open access)

Detecting heavy flavors at CBA

In the CBA luminosity range (L approx. = 10/sup 32/-10/sup 33/cm/sup -2/sec/sup -1/) the expected rate of bare heavy flavor production is high enough to allow for detection schemes which rely on relatively small leptonic branching ratios. These provide a clean separation of the signal from the gluon plus light quark background, while retaining sufficient statistics for further study. The current status of the investigation of lepton-related triggers and cuts is presented, and the jet topologies of events (both signal and background) with high-P/sub T/ leptons are discussed. While these studies have been carried out with samples of high-P/sub T/ q anti q and gluon jets generated with ISAJET, other sources of heavy flavor production at CBA are surveyed.
Date: March 1, 1983
Creator: Aronson, S.; Ogilvie, M.; Stumer, I.; Tanaka, M. & Wanderer, P.
Object Type: Report
System: The UNT Digital Library
Some novel features of the ordinary-mode electron-cyclotron resonance heating of tokamak plasmas (open access)

Some novel features of the ordinary-mode electron-cyclotron resonance heating of tokamak plasmas

It is shown that the finite k/sub parallel/ linear theory of absorption predicts: first, that the Doppler effect splits the k/sub parallel/ = o resonance into two closely spaced resonances instead of the usual Gaussian broadening; and second, that although the total absorption is due to the finite size of the electron Larmor orbits, it is mainly determined by T/sub parallel/ and is only weakly dependent on T/sub perpendicular/ via cyclotron overstability type terms. Some consequences of these unique features on plasma heating and rf current drive are also examined.
Date: March 1, 1983
Creator: Arunasalam, V.; Efthimion, P. C.; Hosea, J. C.; Hsuan, H. & Taylor, G.
Object Type: Report
System: The UNT Digital Library
Performance of the new cryogenic vacuum system at the Bevatron (open access)

Performance of the new cryogenic vacuum system at the Bevatron

A cryogenically cooled liner has been installed within the Bevatron to achieve 10/sup -10/ torr vacuum. Features and performance of this liner are described including achieved pressures, residual gas composition, cryo heat loads, leak rates through moving and static seals, and cool-down and warm-up times.
Date: March 1, 1983
Creator: Avery, R. T.; Henderson, T. F.; Kennedy, K. D.; Meneghetti, J. R. & Alonso, J. R.
Object Type: Article
System: The UNT Digital Library
Physics potential of the CBA: a summary (open access)

Physics potential of the CBA: a summary

The purpose of this summary is to bring to the attention of the high energy physics community the wide variety of new physics experiments that the high luminosity and high energy of CBA will make possible. These examples are intended to illustrate the power and flexibility of the machine. It will provide the facilities for a very large number of experimentalists to pursue a broad range of physics. The high luminosity allows not only the study of rare processes but also the use of small, special purpose detectors. The six interaction regions can be arranged in different configurations, so, for example, one can be at very high luminosity for a ..mu../sup +/..mu../sup -/ experiment, another can have a small diamond for use with a vertex detector, and so on. There is the possibility of polarized protons, heavy ions and variable energies in the two rings. The machine will be dedicated solely to colliding beam physics. There is a great deal of very important physics that will clearly be done if CBA is built: detailed studies of the W and its interactions, extensive studies of the properties of the b-quark, systematic studies of QCD and proton structure through the Drell-Yan and …
Date: March 9, 1983
Creator: Baggett, N.; Gibbard, B.; Gordon, H.; Paige, F. & Trueman, T.L. (eds.)
Object Type: Report
System: The UNT Digital Library
Projectile-power-compressed magnetic-field pulse generator (open access)

Projectile-power-compressed magnetic-field pulse generator

Design considerations and experimental results are presented of a compressed magnetic field pulsed energy source. A 100-mm-diameter, gun-fired projectile of approx. 2MJ kinetic energy was the input energy source. An initial magnetic field was trapped and compressed by the projectile. With a shorted load, a magajoule in a nanohenry was the design goal, i.e., 50 percent energy transformation from kinetic to magnetic. Five percent conversion was the highest recorded before gauge failure.
Date: March 17, 1983
Creator: Barlett, R.H.; Takemori, H.T. & Chase, J.B.
Object Type: Article
System: The UNT Digital Library
Release of volatile fission products from uranium dioxide (open access)

Release of volatile fission products from uranium dioxide

Post-irradiation anneal experiments have been used to determine the release of iodine and tellurium from lightly irradiated UO/sub 2/ samples maintained at stoichiometry. The applicability of the equivalent-sphere model of diffusion to release of fission gases has been tested. Diffusion coefficients and activation energies have been evaluated. The diffusion coefficient of /sup 132/Te at 1400/sup 0/C was found to be of an order-of-magnitude larger than that of /sup 131/I. This result may be of importance for an understanding of the pellet-cladding interaction and for a better evaluation of the source term for fission-product release under accident conditions. Qualitatively, the influence of the stoichiometry on the release of /sup 133/Xe, /sup 131/I, and /sup 132/Te has been established.
Date: March 1, 1983
Creator: Bayen, D.
Object Type: Report
System: The UNT Digital Library
Waste form/rock interaction leaching study using PNL 76-68 glass beads and Umtanum basalt. Part I (open access)

Waste form/rock interaction leaching study using PNL 76-68 glass beads and Umtanum basalt. Part I

A 440-day single-pass continuous-flow leaching experiment was conducted at LLNL from September 1980 to December 1981. The data obtained for only one-third of the experiment are presented. The laboratory and data analysis of the remaining portion is still in progress at this time and a second report will follow at the end of FY83. This report concerns itself with the study of PNL 76-68 glass beads interacting with crushed uranium flow basalt and a simulated basalt groundwater under controlled conditions of temperature (25/sup 0/C and 75/sup 0/C) and flow rate (1, 10, and 300 ml/day). The main purpose of the experiment was to determine the absorption on basalt of Pu, Np, and some of the stable elements such as B, Mo, U, and Cs, as they were leached from the glass beads. Results are presented, as incremental and cumulative leach rates and sorption rates have been calculated for Pu, Np, B, Mo and U. also sorption profiles as a function of temperature and flow rate are graphically shown for Pu, Np, and U.
Date: March 31, 1983
Creator: Bazan, F.; Rego, J.; Failor, R. & Coles, D.
Object Type: Report
System: The UNT Digital Library
Toxic material advisory report - 2-mercaptoethanol (open access)

Toxic material advisory report - 2-mercaptoethanol

A review of the animal toxicity data for 2-ME is presented. The results revealed that chronic inhalation exposures at a concentration of 6 mg/m/sup 3/ produced decreased oxygen consumption, lymphopenia, and neutrophilia. Comparison of acute toxicity data for 2-ME with data of structurally similar compounds suggests that 2-ME may be 2.3 times more toxic than butanethiol (TLV = 0.5 ppM), 6.5 times more toxic than ethanethiol, and 6 times more toxic than propanethiol (TLV = 0.5 ppM) via oral administration but may be comparable to propanethiol and less toxic than butanethiol and ethanethiol by the inhalation route of exposure. The TLVs for ethanethiol, methanethiol, and butanethiol were based on discomfort to human volunteers rather than toxicity. Since 2-ME has many effects similar to those of the thiols discussed and its odor threshold falls in the range of other thiols, by analogy the exposure limit for 2-ME should be comparable to the TLVs for butanethiol and ethanethiol. An interim exposure limit (IEL) of 0.5 ppM for a time-weighted average concentration during an 8-hour work shift is recommended. As with other thiols, a nuisance problem due to 2-ME odors and complaints of odor may serve as a primary reason for controlling workplace …
Date: March 1, 1983
Creator: Bernholc, N. M.; White, O., Jr.; Baloyi, R. S. & Silverstein, B. D.
Object Type: Report
System: The UNT Digital Library
Magnetic switching, final chapter, Book I: the ATA upgrade prototype (open access)

Magnetic switching, final chapter, Book I: the ATA upgrade prototype

Efforts directed at finding a 10 kHz switch to replace the current 1 kHz gas blown spark gap have culminated in a prototype for an upgrade of ATA. The design and performance of this prototype as well as possible options and recommendations concerning an eventual upgrade are described. 4 references, 9 figures.
Date: March 22, 1983
Creator: Birx, D.; Cook, E.; Hawkins, S.; Poor, S.; Reginato, L.; Schmidt, J. et al.
Object Type: Article
System: The UNT Digital Library
Stochastic cooling: recent theoretical directions (open access)

Stochastic cooling: recent theoretical directions

A kinetic-equation derivation of the stochastic-cooling Fokker-Planck equation of correlation is introduced to describe both the Schottky spectrum and signal suppression. Generalizations to nonlinear gain and coupling between degrees of freedom are presented. Analysis of bunch beam cooling is included.
Date: March 1, 1983
Creator: Bisognano, J.
Object Type: Article
System: The UNT Digital Library
Threshold behavior for longitudinal stability of induction linac bunches (open access)

Threshold behavior for longitudinal stability of induction linac bunches

The induction linac bunches of heavy-ion-fusion scenarios are strongly influenced by the longitudinal space-charge impedance. This is in distinct contrast to relativistic bunches in storage rings where most of the data on stability have been obtained. Simulation results reveal that when space-charge effects are large, the stability requirement of small growth rate relative to the synchrotron frequency for relativistic bunches is replaced by the relaxed condition of small growth rate relative to the frequency spacing of the space charge wave modes on the bunch. Dispersive effects from finite pipe size tend to make the lower frequencies less susceptible to instability than higher frequencies. Since induction modules have a high resistive component only for the lowest bunch modes, stability is better than would occur for a broadband impedance of comparable magnitude. These results indicate that long-term longitudinal bunch stability is realizable for induction-linac drivers for heavy-ion fusion.
Date: March 1, 1983
Creator: Bisognano, J.; Haber, I. & Smith, L.
Object Type: Article
System: The UNT Digital Library
Simulation and analysis of district-heating and -cooling systems (open access)

Simulation and analysis of district-heating and -cooling systems

A computer simulation model, GEOCITY, was developed to study the design and economics of district heating and cooling systems. GEOCITY calculates the cost of district heating based on climate, population, energy source, and financing conditions. The principal input variables are minimum temperature, heating degree-days, population size and density, energy supply temperature and distance from load center, and the interest rate. For district cooling, maximum temperature and cooling degree-hours are required. From this input data the model designs the fluid transport and district heating systems. From this design, GEOCITY calculates the capital and operating costs for the entire system. GEOCITY was originally developed to simulate geothermal district heating systems and thus, in addition to the fluid transport and distribution models, it includes a reservoir model to simulate the production of geothermal energy from geothermal reservoirs. The reservoir model can be adapted to simulate the supply of hot water from any other energy source. GEOCITY has been used extensively and has been validated against other design and cost studies. GEOCITY designs the fluid transport and distribution facilities and then calculates the capital and operating costs for the entire system. GEOCITY can simulate nearly any financial and tax structure through varying the rates …
Date: March 1, 1983
Creator: Bloomster, C.H. & Fassbender, L.L.
Object Type: Article
System: The UNT Digital Library
Charge state of sputtered impurity ions near a limiter or divertor in a tokamak (open access)

Charge state of sputtered impurity ions near a limiter or divertor in a tokamak

Many impurity atoms sputtered from a limiter or divertor plate are ionized in the scrapeoff zone and return to the sputtering surface bacause of friction with incoming plasma ions. The final charge state attained by such impurities has been calculated for a variety of plasma edge conditions. The surface materials considered are tungsten, beryllium, beryllium oxide, and carbon. Estimates of the successive ionization cross sections for tungsten are developed. In all cases examined, returning impurity ions are found to be multiply ionized. This implies a significant energy gain in the sheath region, with important implications for self-sputtering of redeposited surface material.
Date: March 1, 1983
Creator: Boley, C. D.; Brooks, J. N. & Kim, Y. K.
Object Type: Report
System: The UNT Digital Library
Time-dependent drift Hamiltonian (open access)

Time-dependent drift Hamiltonian

The lowest-order drift equations are given in a canonical magnetic coordinate form for time-dependent magnetic and electric fields. The advantages of the canonical Hamiltonian form are also discussed.
Date: March 1, 1983
Creator: Boozer, A. H.
Object Type: Report
System: The UNT Digital Library
Deformation of evaporites near the Waste Isolation Pilot Plant (WIPP) site (open access)

Deformation of evaporites near the Waste Isolation Pilot Plant (WIPP) site

Layered evaporite units of Ochoan age in the Delaware Basin are 1000 m thick. They are divided into three stratigraphic units (listed in order of increasing age): the Rustler Formation, the Salado Formation, the Castile Formation. These units, especially the Castile, are deformed along portions of the margin of the Delaware Basin and in some areas internal to the basin. Hypotheses of origin of deformation considered are: gravity foundering; gravity sliding; gypsum dehydration; dissolution; and depositional variations. Gravity foundering and sliding are considered the most probable causes of deformation. However, no hypothesis adequately answers why the deformation has a limited areal distribution. A possible explanation would be areal variations in rock strength caused by variations of intergranular water content. Age and timing of deformation are also crucial. Standard stratigraphic arguments based on superposition may not apply to such a highly incompetent material as halite. Gravity foundering could have happened at any time since deposition including the present; gravity sliding would probably have occurred since basin tilting began in the Cenozoic. Deformation could be ongoing. However, the strain rates are such (10/sup -16/ s/sup -1/) that deformation would progress slowly relative to the facility's time frame of 2.5 x 10/sup 5/ …
Date: March 1, 1983
Creator: Borns, D. J.; Barrows, L. J.; Powers, D. W. & Snyder, R. P.
Object Type: Report
System: The UNT Digital Library
Nuclear waste package materials testing report: basaltic and tuffaceous environments (open access)

Nuclear waste package materials testing report: basaltic and tuffaceous environments

The disposal of high-level nuclear wastes in underground repositories in the continental United States requires the development of a waste package that will contain radionuclides for a time period commensurate with performance criteria, which may be up to 1000 years. This report addresses materials testing in support of a waste package for a basalt (Hanford, Washington) or a tuff (Nevada Test Site) repository. The materials investigated in this testing effort were: sodium and calcium bentonites and mixtures with sand or basalt as a backfill; iron and titanium-based alloys as structural barriers; and borosilicate waste glass PNL 76-68 as a waste form. The testing also incorporated site-specific rock media and ground waters: Reference Umtanum Entablature-1 basalt and reference basalt ground water, Bullfrog tuff and NTS J-13 well water. The results of the testing are discussed in four major categories: Backfill Materials: emphasizing water migration, radionuclide migration, physical property and long-term stability studies. Structural Barriers: emphasizing uniform corrosion, irradiation-corrosion, and environmental-mechanical testing. Waste Form Release Characteristics: emphasizing ground water, sample surface area/solution volume ratio, and gamma radiolysis effects. Component Compatibility: emphasizing solution/rock, glass/rock, glass/structural barrier, and glass/backfill interaction tests. This area also includes sensitivity testing to determine primary parameters to be studied, …
Date: March 1, 1983
Creator: Bradley, D. J.; Coles, D. G.; Hodges, F. N.; McVay, G. L. & Westerman, R. E.
Object Type: Report
System: The UNT Digital Library
Space nuclear-safety program. Progress report, October 1982 (open access)

Space nuclear-safety program. Progress report, October 1982

This technical monthly report covers studies related to the use of /sup 238/PuO/sub 2/ in radioisotope power systems carried out for the Office of Special Nuclear Projects of the US Department of Energy by Los Alamos National Laboratory. Most of the studies discussed here are ongoing. Results and conclusions described may change as the work continues.
Date: March 1, 1983
Creator: Bronisz, S. E.
Object Type: Report
System: The UNT Digital Library
Report on the production magnet measurement system for the Fermilab Energy-Saver superconducting dipoles and quadrupoles (open access)

Report on the production magnet measurement system for the Fermilab Energy-Saver superconducting dipoles and quadrupoles

The measurement system and procedures used to test more than 900 superconducting dipole magnets and more than 275 superconducting quadrupole magnets for the Fermilab Energy Saver are described. The system is designed to measure nearly all parameters relevant to the use of the magnets in the accelerator including maximum field capability and precision field measurements. The performance of the instrumentation with regard to precision, reliability, and operational needs for high volume testing will be described. Previous reports have described the measurement system used during development of the Saver magnets from which this system has evolved.
Date: March 1, 1983
Creator: Brown, B. C.; Cooper, W. E.; Garvey, J. D.; Gross, D. A.; Hanft, R.; Kaczar, K. P. et al.
Object Type: Report
System: The UNT Digital Library