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1.2 MW klystron for Asymmetric Storage Ring B Factory
A cw klystron operating at 476 MHz has been developed jointly by SLAC and Varian Associates. The unique set of characteristics of this tube were strongly guided by requirements of the fast feedback necessary to prevent oscillations of the storage ring beams caused by the detuned accelerating cavity. This requires a combination of bandwidth and short group delay within the klystron. The RF feedback stabilization scheme also requires amplitude modulation making it necessary to operate the klystron about 10% below saturation. Performance specifications and initial operating results are presented.
Date:
March 1995
Creator:
Fowkes, W. R.; Caryotakis, G. & Doyle, E.
Object Type:
Article
System:
The UNT Digital Library
O(1/M{sup 3}) effects for heavy-light mesons in lattice NRQCD
The masses of spin-singlet and spin-triplet S-wave mesons containing a single heavy quark are computed in the quenched approximation. The light quark action and gauge field action are both classically-improved and tadpole-improved, and the couplings to the heavy quark are organized by the 1/M expansion of tadpole-improved NRQCD. At each of two lattice spacings, near 0.22fm and 0.26fm, meson masses are obtained for heavy quarks spanning the region between charmed and bottom mesons. Results up to O(1/M), O(1/M{sup 2})and O(1/M{sup 3}) are displayed separately, so that the convergence of the heavy quark expansion can be discussed. Also, the effect of each term in the O(1/M{sup 3}) contribution is computed individually. For bottom mesons the 1/M-expansion appears to be satisfactory, but the situation for charmed mesons is less clear.
Date:
March 1998
Creator:
Lewis, Randy & Woloshyn, R. M.
Object Type:
Article
System:
The UNT Digital Library
3-d finite element model development for biomechanics: a software demonstration
Finite element analysis is becoming an increasingly important part of biomechanics and orthopedic research, as computational resources become more powerful, and data handling algorithms become more sophisticated. Until recently, tools with sufficient power did not exist or were not accessible to adequately model complicated, three-dimensional, nonlinear biomechanical systems. In the past, finite element analyses in biomechanics have often been limited to two-dimensional approaches, linear analyses, or simulations of single tissue types. Today, we have the resources to model fully three-dimensional, nonlinear, multi-tissue, and even multi-joint systems. The authors will present the process of developing these kinds of finite element models, using human hand and knee examples, and will demonstrate their software tools.
Date:
March 1, 1997
Creator:
Hollerbach, K.; Hollister, A.M. & Ashby, E.
Object Type:
Article
System:
The UNT Digital Library
4-D conformal field theories and strings on orbifolds
None
Date:
March 16, 1998
Creator:
Kachru, Shamit & Silverstein, Eva
Object Type:
Article
System:
The UNT Digital Library
6 GeV synchrotron x-ray source: Conceptual design report. Supplement B - conceptual design of proposed beam lines for the 6 GeV light source
In this document, preliminary conceptual designs are presented for ten sample beamlines for the 6 GeV Light Source. These beamlines will accommodate investigations in solid-state physics, materials science, materials technology, chemical technology, and biological and medical sciences. In future, the designs will be altered to include new developments in x-ray optics and hardware technologies. The research areas addressed by the samples beamlines are as follows: Topography and Radiography/Tomography (section 2); Inelastic Scattering with Ultrahigh Energy Resolution (Section 3); Surface and Bulk Studies Using High Momentum Resolution (Section 4); Inelastic Scattering from Charge and Spin (Section 5); Advanced X-Ray Photoelectron Spectroscopy Studies (Section 6); Small Angle X-Ray Scattering Studies (Section 7); General Purpose Scattering for Materials Studies (Section 8); Multiple-Energy Anomalous-Dispersion Studies of Proteins (Section 9); Protein Crystallography (Section 10); Time- and Space-resolved X-Ray Spectroscopy (Section 11); Medical Diagnostic Facility (Section 12); and Transuranium Research Facility (Section 13). The computer systems to be used on the beamlines are also discussed in Section 14 of this document.
Date:
March 1, 1996
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
9-1-1 Caller, Volume 4, Number 2, March/April 1992
Bimonthly newsletter of the Texas Advisory Commission on State Emergency Communications discussing news and activities of the organization as well as other information related to 9-1-1 services and other emergency communication within Texas.
Date:
March 1992
Creator:
Texas. Advisory Commission on State Emergency Communications.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
9-1-1 Caller, Volume 5, Number 2, March/April 1993
Bimonthly newsletter of the Texas Advisory Commission on State Emergency Communications discussing news and activities of the organization as well as other information related to 9-1-1 services and other emergency communication within Texas.
Date:
March 1993
Creator:
Texas. Advisory Commission on State Emergency Communications.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
10-MW demonstration of the gas suspension absorption process at TVA`s Center for Emissions Research. Final report
The Tennessee Valley Authority (TVA) in cooperation with AirPol Inc., and the U.S. Department of Energy (DOE), has recently completed a successful 17-month test program with the AirPol Gas Suspension Absorption (GSA) flue gas desulfurization (FGD) process at TVA`s Center for Emissions Research (CER). This project was selected by DOE for funding in the third round of the Clean Coal Technology Program. This 10-MW demonstration of the GSA FGD system at the CER was the first application of this technology in the U.S. The GSA test program, which was cofunded two-thirds by TVA and one-third by DOE/AirPol, was completed over a 17-month period from November 1, 1992 to March 31, 1993. This test program demonstrated that the GSA FGD technology could achieve high SO{sub 2} removal efficiencies (90+ percent) for a 2.7 percent sulfur (as-fired) coal application, while maintaining particulate emissions below the New Source Performance Standards (NSPS), i.e., 0.03 lb/MBtu, in a four-field electrostatic precipitator. The reliability and operability of this system was also demonstrated in a 28-day, 24 hour/day, continuous run during which the GSA unit simultaneously achieved high SO{sub 2} removal efficiencies (90+ percent) and maintained particulate emissions below the NSPS. Also, the air toxics removal capabilities …
Date:
March 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
10 Things You Can Do To Make Our Schools Better
Photocopy of a clipping from Parade Magazine, featuring an article titled, "10 Things You Can Do To Make Our Schools Better," by Vartan Gregorian. Gregorian will become the President of the Carnegie Corporation of New York in June, 1997. Gregorian is one of the leading authorities on education in America and has written a list about some things concerned individuals can do right now to better the schools and education in the area. The 10th thing on Gregorian's list is to restore the arts as a major element in education. "We've made a tremendous mistake in diminishing or eliminating art, music and dance as fluff or frills."
Date:
March 23, 1997
Creator:
Gregorian, Vartain
Object Type:
Clipping
System:
The UNT Digital Library
16 Channel ECL repeater
This paper describes the circuits of a 16 channel CL repeater. (LSP)
Date:
March 7, 1990
Creator:
Graupman, Dan
Object Type:
Report
System:
The UNT Digital Library
45-Day safety screening report for grab samples from Tank 241-AP-107
Three samples; 107-AP-1C, 107-AP-2c and 107-AP-3C; were received at 222-S Laboratory for analysis of DSC, TGA and visual appearance. Four additional samples; 107-AP-1D, 107-AP-2D, 107-AP-3D and 107-AP-6; were received for visual appearance only. No results exceeded the safety screen notification criteria. This report compiles the analytical results. Tank 241-AP-107 is a double-shell tank which is not on any of the four Watch Lists.
Date:
March 8, 1995
Creator:
Miller, George L.
Object Type:
Report
System:
The UNT Digital Library
The 50 GeV program at SLAC
SLAC has undertaken a modes programs to upgrade the beam energy for fixed target experiments to 50 GeV. This upgrade is possible due to the previous extensive development work on the linac accelerating gradient for the SLC, which has been operational for over five years. The SLC can deliver a beam of energy up to 60 GeV using a pulse compression technique in the rf system which trades pulse length for a higher pulse amplitude. This mode of operation has been reliable and routine for the SLC. However the beam line transport which takes electrons or positrons from the end of the linac to the target in End Station A has not been upgraded from the original design energy of 25 GeV. The 50 GeV upgrade for the fixed target experiments consists in modifying and increasing the number of beam line dipole magnets to reach 50 GeV, plus modernization of the beam line instrumentation and controls. The plans for spin structure experiments using electron beams at energies up to 50 GeV are described.
Date:
March 1, 1994
Creator:
Prescott, C. Y.
Object Type:
Article
System:
The UNT Digital Library
65 Minutes, March-April 1990
Bimonthly newsletter of Denton Boy Scout Troop 65 containing a list of upcoming events, news and announcements, and other information for members.
Date:
March 1990
Creator:
Boy Scouts of America. Troop 65 (Denton, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
94-1 Research and development project lead laboratory support. Status report, July 1, 1996--September 30, 1996
This document reports status and technical progress for Los Alamos 94-1 Research and Development projects. Updated schedule charts are shown in the appendix. This is the fourth status report published for Los Alamos National Laboratory 94-1 Research and Development Project Support. The Department of Energy Office of Environmental Management (DOE/EM) funds these projects in order to support the storage or disposal of legacy plutonium and plutonium-bearing materials resulting from weapons production throughout the DOE complex. This document also serves as an end-for-year review of projects and positions the program for FY97.
Date:
March 1, 1997
Creator:
Rink, N.
Object Type:
Report
System:
The UNT Digital Library
97-ERD-022 final report: Supernova on Nova
This is the final year of the 3-year LDRD-ERD involving Lasers, D&NT, Physics, and ILSA to develope astrophysics experiments on intense lasers such as the Nova and Gekko lasers. During this 3 year period, we have developed a highly successful experiment probing the hydrodynamics of the explosion phase of core-collapse supernovae, which occurs during the first ~3 hours after core collapse. This was in collaboration with the Univ. of Arizona and CEA/Saclay. We also developed a very successful experiment to probe the hydrodynamics of the later time, young remnant phase, meaning the first ~10-20 years after core collapse. This was in collaboration with the Univ. of Michigan and Univ. of Colorado. Finally, we developed during the final year an exquisite experiment to probe the dynamics of radiative, high Mach number astrophysical jets, in collaboration with the Univ. of Maryland and Osaka Univ. Each experiment has received very high visibility, with a multitude of publications, both in the technical journals (most importantly, the astrophysical journals) and in the popular press. The attached publication list shows 25 papers published or submitted to technical journals, 5 articles appearing in the popular press (including a cover story of Sky and Telescope), and 65 conference …
Date:
March 11, 1999
Creator:
Remington, B. A.
Object Type:
Report
System:
The UNT Digital Library
100 Area soil washing bench-scale test procedures
This document describes methodologies and procedures for conducting soil washing treatability tests in accordance with the 100 Area Soil Washing Treatability Test Plan (DOE-RL 1992, Draft A). The objective of this treatability study is to evaluate the use of physical separation systems and chemical extraction methods as a means of separating chemically and radioactively contaminated soil fractions from uncontaminated soil fractions. These data will be primarily used for determining feasibility of the individual unit operations and defining the requirements for a system, or systems, for pilot-scale testing.
Date:
March 1, 1993
Creator:
Freeman, H. D.; Gerber, M. A.; Mattigod, S. V. & Serne, R. J.
Object Type:
Report
System:
The UNT Digital Library
100 Area soil washing bench-scale test procedures
This document describes methodologies and procedures for conducting soil washing treatability tests in accordance with the 100 Area Soil Washing Treatability Test Plan (DOE-RL 1992, Draft A). The objective of this treatability study is to evaluate the use of physical separation systems and chemical extraction methods as a means of separating chemically and radioactively contaminated soil fractions from uncontaminated soil fractions. These data will be primarily used for determining feasibility of the individual unit operations and defining the requirements for a system, or systems, for pilot-scale testing.
Date:
March 1, 1993
Creator:
Freeman, H. D.; Gerber, M. A.; Mattigod, S. V. & Serne, R. J.
Object Type:
Report
System:
The UNT Digital Library
>100 watt average power at 0.53 {mu}m with 25 ns, 2.5 kHz repetition rate pulses from a single power oscillator
We have generated approximately 100 watts of frequency doubled light from the output of an electro-optically Q-switched, diode-pumped Nd:YAG slab laser oscillator operating at an average power of 200 watts (2.5 kHz repetition rate, 80 mJ/pulse, 25 ns pulsewidth). The Q-switch was a compensated z-axis propagation LiNbO{sub 3} electro-optic modulator, and the frequency conversion crystal was a thin slab of KTP. In addition, Q-switched operation at an average power of approximately 250 watts with 26 ns pulsewidths has been demonstrated.
Date:
March 1, 1994
Creator:
Velsko, S. P.; Comaskey, B.; Albrecht, G. F. & Beach, R. J.
Object Type:
Article
System:
The UNT Digital Library
105 K-West isolation barrier leak recovery plan
Leak testing is being performed in 105 KW to verify the performance of the isolation barriers which have been recently installed. When an 11 inch differential head is established between the main basin and the discharge chute, a leak-rate of approximately 30 - 35 gpm is observed. The leak-rate would be achieved by a 1.65`` - 2`` diameter hole (or equivalent). Analyses suggest that the flow is turbulent/laminar transitional (dominantly turbulent), which would be indicative of a single point leak, typical of a pipe or large opening. However, local vortex rotation is observed in the entry to the West transfer chute while no observable motion was seen in the East transfer chute: this may be an indication of seal leakage in the East isolation barrier. The potential for leakage had been considered during the design and field work planning stages. Review of potential leak detection technologies had been made; at the planning stage it was determined that location specific leak detection could be established relatively quickly, applying existing K Basins technology (dye or ultrasonics). The decision was made not to pre-stage leak detection since the equipment development is highly dependent on the nature and location of the leak, and the …
Date:
March 2, 1995
Creator:
Wiborg, J.C.
Object Type:
Report
System:
The UNT Digital Library
200 Area Liquid Effluent Facilities -- Quality assurance program plan
This Quality Assurance Program Plan (QAPP) describes the quality assurance and management controls used by the 200 Area Liquid Effluent Facilities (LEF) to perform its activities in accordance with DOE Order 5700.6C. The 200 Area LEF consists of the following facilities: Effluent Treatment Facility (ETF); Treated Effluent Disposal Facility (TEDF); Liquid Effluent Retention facility (LERF); and Truck Loading Facility -- (Project W291). The intent is to ensure that all activities such as collection of effluents, treatment, concentration of secondary wastes, verification, sampling and disposal of treated effluents and solids related with the LEF operations, conform to established requirements.
Date:
March 13, 1995
Creator:
Fernandez, L.
Object Type:
Report
System:
The UNT Digital Library
200 Area treated effluent disposal facility operational test report
This document reports the results of the 200 Area Treated Effluent Disposal Facility (200 Area TEDF) operational testing activities. These completed operational testing activities demonstrated the functional, operational and design requirements of the 200 Area TEDF have been met.
Date:
March 1, 1995
Creator:
Crane, A.F.
Object Type:
Report
System:
The UNT Digital Library
The 239 Pu(n,2n)238Pu cross section: preliminary calculations
The primary motivation for the present work is to provide theoretical values for the ratio of the partial <sup>239</sup>Pu(n,2nx{gamma})<sup>238</sup>Pu to total <sup>239</sup> Pu(n,2n)<sup>238</sup>Pu cross section for several discrete gamma transitions. Results and conclusions of preliminary calculations from threshold to 20 MeV are presented. Calculations are based on theoretical models with parameters obtained from the literature or from our ad hoc systematics. Optical model cross sections and transmission coefficients were determined using the coupled-channels method. The calculations included a preequilibrium component followed by multiple particle and gamma-ray emissions. Fission competition was included at all stages of de-excitation. Suggestions for further verifications and possible improvements are provided.
Date:
March 12, 1999
Creator:
Chen, H.; Reffo, G.; Ross, M. A. & White, R. M.
Object Type:
Report
System:
The UNT Digital Library
241-SX Fan driver sheave replacement
This SD documents revision of CVI 17443 which changes the type of motor sheaves driving the K1 fans in SX farm. This revision documents changing the driver (motor) sheave from a variable pitch to a fixed sheave. The drive sheave is changed in response to a recommendation from the Equipment Condition Monitoring Group. Changing the variable pitch sheave to a fixed pitch sheave is expected to reduce the vibration of the fan which will prolong the life of the equipment.
Date:
March 1, 1995
Creator:
Filkowski, R.V.
Object Type:
Report
System:
The UNT Digital Library
241-SY-101 strain concentration factor development via nonlinear analysis. Volume 1 of 1
The 241-SY-101 waste storage tank at the Hanford-Site has been known to accumulate and release significant quantities of hydrogen gas. An analysis was performed to assess the tank`s structural integrity when subjected to postulated hydrogen deflagration loads. The analysis addressed many nonlinearities and appealed to a strain-based failure criteria. The model used to predict the global response of the tank was not refined enough to confidently predict local peak strains. Strain concentration factors were applied at structural discontinuities that were based on steel-lined reinforced-concrete containment studies. The discontinuities included large penetrations, small penetrations, springline geometries, stud/liner connections, and the {1/2} inch to 3/8 inch liner thickness transition. The only tank specific strain concentration factor applied in the evaluation was for the {1/2} inch to 3/8 inch liner thickness change in the dome. Review of the tank drawings reveals the possibility that a 4 inches Sch. 40 pipe penetrates the dome thickness transition region. It is not obvious how to combine the strain concentration factors for a small penetration with that of a thickness transition to arrive at a composite strain concentration factor. It is the goal of this effort to make an approximate determination of the relative significance of the …
Date:
March 1, 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library