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Electrodynamic forces of the cross-connected figure-eight null-flux coil suspension system

Description: This paper analyzes the cross-connected figure-eight null-flux coil suspension system for maglev vehicles on the basis of dynamic circuit theory. The equivalent circuits and general magnetic force expressions for the system are developed. Simple analytical formulas for the magnetic force partitions on the basis of harmonic approximation are presented, and numerical results are also included.
Date: January 1, 1993
Creator: He, J. L.; Rote, D. M. & Coffey, H. T.
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Partner: UNT Libraries Government Documents Department
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Synchrotron beam-loading stability with a higher rf harmonic

Description: This work is an attempt to extend Robinson's stability studies to include a higher rf harmonic. Using an equivalent circuit model, the stability of the O-mode'' coherent dipole oscillation of bunched beams is studied for synchrotrons or storage rings, with rf systems operated at the fundamental and a higher harmonic, i.e., a 2nd or 3rd harmonic. Analytical expressions of the stability criteria are derived from the linearized circuit equations. Numerical solutions of the fully nonlinear equation… more
Date: January 1, 1993
Creator: Wang, Tai-Sen F.
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Partner: UNT Libraries Government Documents Department
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High resolution ADC interface to main magnet power supply at the NSLS

Description: Previous readings of DCCT were limited to 11 bits of resolution with large offsets and drifts, providing inaccurate data. The current design overcomes this limitation by using Analog Device's AD7703 20 bit serial output ADC to digitize the main magnet DCCT at the power supply, and transmit the data serially at 2KHz over to the VME controller.
Date: January 1, 1993
Creator: Bordoley, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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West Valley transfer cart control system design description

Description: Detail design of the control system for the West Valley Nuclear Services Vitrification Facility transfer cart has been completed by Oak Ridge National Laboratory. This report documents the requirements and describes the detail design of that equipment and control software. Copies of significant design documents including analysis and testing reports and design drawings are included in the Appendixes.
Date: January 1, 1993
Creator: Bradley, E. C.; Crutcher, R. I.; Halliwell, J. W.; Hileman, M. S.; Moore, M. R.; Nodine, R. N. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental particle physics at the University of Pittsburgh. [Dept. of Physics and Astronomy]

Description: During the past year on Task A, the HELIOS work drew to a close with first results from the electron-muon pair studies (no anomalous sources are seen, and the final results and uncertainties are being set). First data from CMD2 will allow improvement of some phi branching ratios, including some improved limits on forbidden decays. The engineering run for E865 is scheduled for June and July of 1993. The principal efforts of Task B, the Fermilab program, have been the completion of the analysis o… more
Date: April 1, 1993
Creator: Cleland, W. E.; Engels Jr., E.; Humanic, T. J.; Perera, U.; Shepard, P. F. & Thompson, J. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Assessment of the impact of HTSCs on superconducting fault-current limiters. [High Temperature SuperConductors (HTSCs)]

Description: The possible impact of nitrogen-cooled superconductors on the desip and cost of superconducting fault-current limiters is assessed by considering the technical specifications such devices must meet and by comparing material properties of 77-K and 4-K superconductors. The main advantages of operating superconductors at 77 K are that the refrigeration operating cost is reduced by a factor of up to 25 and the refrigeration capital cost is reduced by a factor of up to 10. The heat capacity is sever… more
Date: January 1, 1993
Creator: Giese, R.F. (Argonne National Lab., IL (United States)) & Runde, M. (Energiforsyningens Forskningsinstitutt A/S, Trondheim (Norway))
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Partner: UNT Libraries Government Documents Department
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High-Speed Imaging of Blood Splatter Patterns

Description: The interpretation of blood splatter patterns is an important element in reconstructing the events and circumstances of an accident or crime scene. Unfortunately, the interpretation of patterns and stains formed by blood droplets is not necessarily intuitive and study and analysis are required to arrive at a correct conclusion. A very useful tool in the study of blood splatter patterns is high-speed photography. Scientists at the Los Alamos National Laboratory, Department of Energy (DOE), and B… more
Date: 1993-22~
Creator: McDonald, Thomas E.; Albright, Kevin A.; King, Nicholas S.P.; Yates, George J. & Levine, George F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High resolution microstructural and microchemical analysis of zirconia eutectic interfaces

Description: Resolution of microscopic analytical methods has greatly improved over the past decade, and it is now possible to examine periodic variations in structure and chemistry at a scale much finer than the spacing typical of eutectic structures (1-5 [mu]m). During the current year, studies were completed on ZrO[sub 2]-NiO and ZrO[sub 2]-MnO eutectic systems, and study was initiated on microchemical variation in two spinodal systems: Cu-Ni-Sn and SnO[sub 2]-TiO[sub 2]. Work was also initiated on metal… more
Date: March 17, 1993
Creator: Notis, Michael R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dynamics, Stability, and Control of Maglev Systems

Description: The dynamic response of maglev systems is important in several respects: Safety and ride quality, guideway design, and system costs. The dynamic response of vehicles is the key element in the determination of ride quality, and vehicle stability is one of the important elements relative to safety. To design a proper guideway that provides acceptable ride quality in the stable region, the vehicle dynamics must be understood. The trade-off between guideway smoothness and the levitation and control… more
Date: January 1, 1993
Creator: Cai, Y.; Chen, S.S.; Rote, D. M. & Coffey, H. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Results from a water-Cerenkov array

Description: Five surface water-Cerenkov detectors (pools), running in coincidence with the CYGNUS extensive air shower array, are described. Preliminary results on the timing response and the estimated angular resolution of the pools are presented. Based on comparisons between the pools and the scintillator array, the angular resolution of the pools is estimated to be [approximately]0.5[degree], consistent with Monte Carlo predictions. Pool trigger rates and photoelectron (pe) lateral distributions are als… more
Date: January 1, 1993
Creator: Dion, C.L. (Maryland Univ., College Park, MD (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Integrating Log-Ratio position processing for the Los Alamos Proton Storage Ring extraction line

Description: The Los Alamos Proton Storage Ring (PSR) compressor ring intended to accept 1-msec-long p macropulses from the LAMPF linear accelerator and compress these pulses to 250 nsec in length. Beam position monitor sensors of the terminated strip-line design centered at 200 nsec are provided in the transport line from LAMPF, the PSR injection line, the PSR ring, and the extracted beam line. Strip-line sensors used in conjunction with phase processing are a good match for linac transport lines and PSR i… more
Date: January 1, 1993
Creator: Hardek, T.W. (Los Alamos National Lab., NM (United States)) & Band, A. (National Inst. of Standards and Technology, Gaithersburg, MD (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Meson production from the E-802 and E-866 experiments at the AGS

Description: Preliminary results from E-802 (Si-beam) and B-866 (Au-beam) are presented for central collisions. Meson production ([pi]'s and K's) in heavy ion collisions are discussed from light systems (A = 55) to heavy systems (A = 394). Comparisons with predictions of the cascade code ARC are carried out. The balance of energy and momentum is considered for the Au+Au data.
Date: January 1, 1993
Creator: Gonin, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Initial operation of the CW 8X H[sup [minus]] ion source discharge

Description: A pulsed 8[Chi] source was built and the H[sup [minus]] beam current, emittance, and power efficiency were measured. These results were promising, so a cooled, dc version designed for operation at arc power levels up to 30 kW was built. Testing of the CW 8[Chi] source discharge is underway. The design dc power loading on the cathode surface is 900 W/cm[sup 2], considerably higher than achieved in any pervious Penning surface-plasma source (SPS). Thus, the electrode surfaces are cooled with pres… more
Date: January 1, 1993
Creator: Smith, H. V. Jr.; Allison, P.; Geisik, C.; Schmitt, D. R.; Schneider, J. D. & Stelzer, J. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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User's manual for the DAD-1 data acquisition daughter board for the SuperCard-2

Description: A detailed description of how to use the DAD-1 data acquisition daughter board is given. The DAD-1 daughter board is used with the SuperCard-2, a VME format processor board manufactured by CSP Inc. that is based on the Intel i860 microprocessor. The daughter board provides high speed acquisition of digital data through a general purpose input port. Data are transferred through direct memory access operations to the memory on the SuperCard-2 board at a rate up to 40 million, 14 bit samples per s… more
Date: May 1, 1993
Creator: Ferron, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of an MCG/fuse/PFS experiment

Description: The Los Alamos PROCYON high-explosive pulsed power (HEPP) implosion system is intended to produce 1 MJ of soft X-radiation for fusion and material studies. The system uses the MK-IX magnetic flux compression generator to drive a slow'' opening switch which, upon operation, connects the output of the MK-IX generator to a plasma flow switch, which, in turn, delivers current to a rapidly imploding load. The closing switch isolates the plasma flow switch (PFS) and load from any precursor current wh… more
Date: January 1, 1993
Creator: Lindemuth, I.R.; Rickel, D.G. & Reinovsky, R.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proceedings of the workshop on applications of synchrotron radiation to trace impurity analysis for advanced silicon processing

Description: Wafer surface trace impurity analysis is essential for development of competitive Si circuit technologies. Today's grazing incidence x-ray fluorescence techniques with rotating anodes fall short of requirements for the future. Hewlett Packard/Toshiba experiments indicate that with second generation synchrotron sources such as SSRL, the techniques can be extended sufficiently to meet important needs of the leading edge Si circuit industry through nearly all of the 1990's. This workshop was held … more
Date: March 1, 1993
Creator: Laderman, S. (Integrated Circuits Business Div., Hewlett Packard Co., Palo Alto, CA (United States)) & Pianetta, P. (Stanford Linear Accelerator Center, Menlo Park, CA (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Logistics for the implementation of lead-free solders on electronic assemblies

Description: The prospects of legislative and regulatory action aimed at taxing, restricting or banning lead-bearing materials from manufactured products has prompted the electronics community to examine the implementation of lead-free solders to replace currently used lead-containing alloys in the manufacture of electronic devices and assemblies. The logistics for changing the well established ``tin-lead solder technology`` require not only the selection of new compositions but also the qualification of di… more
Date: December 31, 1993
Creator: Vianco, P. T. & Artaki, I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A 12-channel VMEbus-based pulse-height analysis module

Description: The author describes a 12-channel VMEbus-based pulse-height analysis board that was designed for use in a high-rate, multidetector, gamma-ray imaging system. This module was designed to minimize dead-time losses and to allow all key parameters to be software controlled. Gamma-ray detectors are connected directly to this module, eliminating the need for additional electronics.
Date: December 1, 1993
Creator: Arnone, G. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Collaborative research on fluidization employing computer-aided particle tracking. Final report

Description: Discussions presented in this report highlight all the important considerations for making particle dynamics measurements using the radioactive active particle tracking methodology. It is seen that the technique makes it possible to obtain data which are not accessible by any other means. Among the advantages of the methods are: (1) It is completely uninvasive, and hence cannot disturb the flow. (2) It can penetrate opaque suspensions. (3) It yields detailed, spatially resolved (subject to reso… more
Date: April 1, 1993
Creator: Chen, M. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

West Valley transfer cart control system design description. Environmental Restoration and Waste Management Program

Description: Detail design of the control system for the West Valley Nuclear Services Vitrification Facility transfer cart has been completed by Oak Ridge National Laboratory. This report documents the requirements and describes the detail design of that equipment and control software. Copies of significant design documents including analysis and testing reports and design drawings are included in the Appendixes.
Date: January 1, 1993
Creator: Bradley, E. C.; Crutcher, R. I.; Halliwell, J. W.; Hileman, M. S.; Moore, M. R.; Nodine, R. N. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Prototyping lead-free solders on hand-soldered, through-hole circuit boards

Description: The lead-free solders 96.5Sn-3.5Ag (wt %), 95.5Sn-4.0Cu-0.5Ag, 91. 84Sn-3.33Ag-4.83Bi were used in the assembly of a through-hole circuit board to determine the feasibility of their suitability in hand soldering processes. Prototypes assembled with 63Sn-37Pb solder were manufactured to serve as control units. Implementation of the lead-free alloys were performed with a rosin-based, mildly activated (RMA) flux and a 700{degree}F soldering tip. A procedure was developed to remove the tin-lead fin… more
Date: December 31, 1993
Creator: Vianco, P. T. & Mizik, P. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Analysis of an MCG/fuse/PFS experiment

Description: The Los Alamos PROCYON high-explosive pulsed power (HEPP) implosion system is intended to produce 1 MJ of soft X-radiation for fusion and material studies. The system uses the MK-IX magnetic flux compression generator to drive a ``slow`` opening switch which, upon operation, connects the output of the MK-IX generator to a plasma flow switch, which, in turn, delivers current to a rapidly imploding load. The closing switch isolates the plasma flow switch (PFS) and load from any precursor current … more
Date: February 1, 1993
Creator: Lindemuth, I. R.; Rickel, D. G. & Reinovsky, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Spice modeling of a FET-switched induction accelerator cell

Description: A PSpice model of an induction accelerator cell switched by field-effect transistors (FETS) has been developed to simulate the modulator`s circuit performance and induction core flux behavior. A FET switched induction cell has been built that generate 4-kV, 1 {mu}s pulses at pulse rates exceeding 100 kHz. The circuit architecture provides for core reset between pulses and produces bursts of pulses that are variable in amplitude, pulse width and prf. The transistor switching array, energy storag… more
Date: June 11, 1993
Creator: Ollis, C. W.; Cravey, W. R.; Hawkins, S. A.; Kirbie, H. C. & Newton, M. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Integrating Log-Ratio position processing for the Los Alamos Proton Storage Ring extraction line

Description: The Los Alamos Proton Storage Ring (PSR) compressor ring intended to accept 1-msec-long p macropulses from the LAMPF linear accelerator and compress these pulses to 250 nsec in length. Beam position monitor sensors of the terminated strip-line design centered at 200 nsec are provided in the transport line from LAMPF, the PSR injection line, the PSR ring, and the extracted beam line. Strip-line sensors used in conjunction with phase processing are a good match for linac transport lines and PSR i… more
Date: June 1, 1993
Creator: Hardek, T. W. & Band, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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