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Quench observation using quench antennas on RHIC IR quadrupole magnets

Description: Quench observation using quench antennas is now being performed routinely on RHIC dipole and quadrupole magnets. Recently, a quench antenna was used on a RHIC IR magnet which is heavily instrumented with voltage taps. It was confirmed that the signals detected in the antenna coils do not contradict the voltage tap signals. The antenna also detects a sign of mechanical disturbance which could be related to a training quench. This paper summarizes signals detected in the antenna and discusses pos… more
Date: July 1995
Creator: Ogitsu, T.; Terashima, A.; Tsuchiya, K.; Ganetis, G.; Muratore, J. & Wanderer, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Solar two: A molten salt power tower demonstration

Description: A consortium of United States utility concerns led by the Southern California Edison Company (SCE) is conducting a cooperative project with the US Department of Energy (DOE), Sandia National Laboratories, and industry to convert the 10-MW Solar One Power Tower Pilot Plant to molten nitrate salt technology. The conversion involves installation of a new receiver, a new thermal storage system, and a new steam generator; it utilizes Solar One`s heliostat field and turbine generator. Successful oper… more
Date: August 1995
Creator: Tyner, C. E.; Sutherland, J. P. & Gould, W. R., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Medical imaging with coded apertures

Description: Now algorithms were investigated for image reconstruction in emission tomography which could incorporate complex instrumental effects such as might be obtained with a coded aperture system. The investigation focused on possible uses of the wavelet transform to handle non-stationary instrumental effects and analytic continuation of the Radon transform to handle self-absorption. Neither investigation was completed during the funding period and whether such algorithms will be useful remains an ope… more
Date: June 16, 1995
Creator: Keto, E. & Libby, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tuning shims for high field quality in superconducting magnets

Description: A high field quality in interaction region quadrupoles is crucial to the luminosity performance of high energy colliders such as the Relativistic Heavy Ion Collider (RHIC). The field quality in magnets is limited in part by manufacturing tolerances in the parts and assembly. A tuning shim method has been developed to reduce the relative field errors ({Delta}B/B) from {approximately}10{sup {minus}4} to {approximately}10{sup {minus}5} at 2/3 of the coil radius. Eight tuning shims having a variabl… more
Date: August 1995
Creator: Gupta, R.; Anerella, M. & Cozzolino, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ultra-intense, short pulse laser-plasma interactions with applications to the fast ignitor

Description: Due to the advent of chirped pulse amplification (CPA) as an efficient means of creating ultra-high intensity laser light (I > 5{times}10{sup 17} W/cm{sup 2}) in pulses less than a few picoseconds, new ideas for achieving ignition and gain in DT targets with less than 1 megajoule of input energy are currently being pursued. Two types of powerful lasers are employed in this scheme: (1) channeling beams and (2) ignition beams. The current state of laser-plasma interactions relating to this fusion… more
Date: April 1, 1995
Creator: Wilks, S. C.; Kruer, W. L.; Young, P. E.; Hammer, J. & Tabak, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The magnet system of the Relativistic Heavy Ion Collider (RHIC)

Description: The Relativistic Heavy Ion Collider now under construction at Brookhaven National Laboratory (BNL) is a colliding ring accelerator to be completed in 1999. Through collisions of heavy ions it is hoped to observe the creation of matter at extremely high temperatures and densities, similar to what may have occurred in the original "Big Bang." The collider rings will consist of 1740 superconducting magnet elements. Some of elements are being manufactured by industrial partners (Northrop Grumman an… more
Date: July 1995
Creator: Greene, A.; Anerella, M. & Cozzolino, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Properties of a new average power Nd-doped phosphate laser glass

Description: The Nd-doped phosphate laser glass described herein can withstand 2.3 times greater thermal loading without fracture, compared to APG-1 (commercially-available average-power glass from Schott Glass Technologies). The enhanced thermal loading capability is established on the basis of the intrinsic thermomechanical properties and by direct thermally-induced fracture experiments using Ar-ion laser heating of the samples. This Nd-doped phosphate glass (referred to as APG-t) is found to be character… more
Date: March 9, 1995
Creator: Payne, S. A.; Marshall, C. D.; Bayramian, A. J.; Wilke, G. D. & Hayden, J. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Plasma gate switch experiment on Pegasus II

Description: The plasma gate switch is a novel technique for producing a long conduction time vacuum opening switch. The switch consists of an aluminum foil which connects the cathode to the anode in a coaxial geometry. The foil is designed so that the maximum axial acceleration is in the center of the foil and that at the appropriate time, the center opens up and magnetic flux is carried down the gun to the load region. The switch is designed to minimize the amount of mass transported into the load region.… more
Date: September 1995
Creator: Wysocki, F. J.; Benage, J. F., Jr. & Shlachter, J. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Single Bunch Stability to Monopole Excitation

Description: We study single bunch stability with respect to monopole longitudinal oscillations in electron storage rings. Our analysis is different from the standard approach based on the linearized Vlasov equation. Rather, we reduce the full nonlinear Fokker-Planck equation to a Schroedinger-like equation which is subsequently analyzed by perturbation theory. We show that the Haissinski solution [3] may become unstable with respect to monopole oscillations and derive a stability criterion in terms of the … more
Date: January 19, 1999
Creator: Podobedov, Boris
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Neutron diffraction study of NiTi during compressive deformation and after shape-memory recovery

Description: Neutron diffraction measurements of internal elastic strains and texture were performed during compressive deformation of martensitic NiTi deforming by twinning. Rietveld refinement of the diffraction spectrum was performed in order to obtain lattice parameter variations and preferred orientation of martensitic variants. The elastic internal strains, are proportional to the externally applied stress but strongly dependent on crystallographic orientation. Plastic deformation by matrix twinning i… more
Date: September 1995
Creator: Dunand, D. C.; Mari, D.; Bourke, Mark A. M. & Goldstone, Joyce A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Deep x-ray lithography for micromechanics

Description: Extensions of the German LIGA process have brought about fabrication capability suitable for cost effective production of precision engineered components. The process attributes allow fabrication of mechanical components which are not capable of being made via conventional subtractive machining methods. Two process improvements have been responsible for this extended capability which involve the areas of thick photoresist application and planarization via precision lapping. Application of low-s… more
Date: August 1995
Creator: Christenson, T. R. & Guckel, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Maintenance Action Work Plan for Waste Area Grouping 1 inactive tanks 3001-B, 3004-B, T-30, and 3013 at Oak Ridge National Laboratory, Oak Ridge, Tennessee. Environmental Restoration Program

Description: This Maintenance Action Work Plan has been prepared to document the activities and procedures for the remediation of four inactive, low-level radioactive tanks at Waste Area Grouping 1, from the Category D list of tanks in the Federal Facility Agreement for the Oak Ridge Reservation (EPA et al. 1994). The four tanks to remediated are tanks 3001-B, 3004-B, T-30, and 3013. Three of the tanks (3001-B, 3004-B, and T-30) will be physically removed from the ground. Because of logistical issues associ… more
Date: July 1, 1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The LCLS X-Ray FEL at SLAC

Description: The design status and R and D plan of a 1.5 Angstrom SASE-FEL at SLAC, called the Linac Coherent Light Source (LCLS), are described. The LCLS utilizes one third of the SLAC linac for the acceleration of electrons to about 15 GeV. The FEL radiation is produced in a long undulator and is directed to an experimental area for its utilization. The LCLS is designed to produce 300 fsec long radiation pulses at the wavelength of 1.5 Angstrom with 9 GW peak power. This radiation has much higher brightne… more
Date: February 9, 1999
Creator: Cornacchia, Massimo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Material and processing issues for the monolithic integration of microelectronics with surface-micromachined polysilicon sensors and actuators

Description: The monolithic integration of micromechanical devices with their controlling electronics offers potential increases in performance as well as decreases in cost for these devices. Analog Devices has demonstrated the commercial viability of this integration by interleaving the micromechanical fabrication steps of an accelerometer with the microelectronic fabrication steps of its controlling electronics. Sandia`s Microelectronics Development Laboratory has integrated the micromechanical and microe… more
Date: August 1, 1995
Creator: Smith, J.H.; Montague, S. & Sniegowski, J.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Using the CAVE virtual-reality environment as an aid to 3-D electromagnetic field computation

Description: One of the major problems in three-dimensional (3-D) field computation is visualizing the resulting 3-D field distributions. A virtual-reality environment, such as the CAVE, (CAVE Automatic Virtual Environment) is helping to overcome this problem, thus making the results of computation more usable for designers and users of magnets and other electromagnetic devices. As a demonstration of the capabilities of the CAVE, the elliptical multipole wiggler (EMW), an insertion device being designed for… more
Date: August 1995
Creator: Turner, L. R.; Levine, D.; Huang, M.; Papka, M. & Kettunen, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Superlattice Photocathodes for Accelerator-Based Polarized Electron Source Applications

Description: A major improvement in the performance of the SLC was achieved with the introduction of thin strained-layer semiconductor crystals. After some optimization, polarizations of 75-85% became standard with lifetimes that were equal to or better than that of thick unstrained crystals. Other accelerators of polarized electrons, generally operating with a much higher duty factor, have now successfully utilized similar photocathodes. For future colliders, the principal remaining problem is the limit on… more
Date: March 22, 1999
Creator: Clendenin, James E
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Results of design calculations. Specification of a prototype zone plate for focusing hard x-rays

Description: A zone plate capable of focusing hard x-rays to less than 1 {mu}m spot size is designed and specified. This design is based on the state-of-art fabrication technology available today. This zone plate consists of Cu/Al layers sputtered alternatively on a round stainless steel core. Parameters of this zone plate are given. The focal length f is given for 8Kev x-rays and the thickness is optimized for focusing efficiency of the same x-ray energy.
Date: January 1991
Creator: Yun, W. B.; Chrzas, J. & Viccaro, P. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Solid Waste Assurance Program Implementation Plan

Description: On June 6, 1995, a waiver to Hanford Site Solid Waste Acceptance Criteria, was approved by the US Department of Energy Richland Operations Office (RL) to replace the low-level, mixed, and transuranic (TRU) generator assessment programs with the Solid Waste Assurance Program (SWAP). This is associated with a waiver that was approved on March 16, 1995 to replace the Storage/Disposal Approval Record (SDAR) requirements with the Waste Specification System (WSS). This implementation plan and the SWA… more
Date: June 19, 1995
Creator: Irons, L.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary design and estimate of capital and operating costs for a production scale application of laser decontamination technology

Description: The application of laser ablation technology to the decontamination of radioactive metals, particularly the surfaces of equipment, is discussed. Included is information related to the design, capital and operating costs, and effectiveness of laser ablation technology, based on commercial excimer and Nd:YAG lasers, for the decontamination of production scale equipment.
Date: August 6, 1994
Creator: Pang, Ho-ming & Edelson, M. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Functional design criteria for the self-installing liquid observation well

Description: This document presents the functional design criteria for installing liquid observation wells (LOWs) into single-shell tanks containing ferrocyanide wastes. The LOWs will be designed to accommodate the deployment of gamma, neutron, and electromagnetic induction probes and to interface with the existing tank structure and environment.
Date: June 16, 1995
Creator: Parra, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Multidimensional DDT modeling of energetic materials

Description: To model the shock-induced behavior of porous or damaged energetic materials, a nonequilibrium mixture theory has been developed and incorporated into the shock physics code, CTH. The foundation for this multiphase model is based on a continuum mixture formulation given by Baer and Nunziato. This multiphase mixture model provides a thermodynamic and mathematically-consistent description of the self-accelerated combustion processes associated with deflagration-to-detonation and delayed detonatio… more
Date: July 1, 1995
Creator: Baer, M. R.; Hertel, E. S. & Bell, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Multidimensional DDT modeling of energetic materials

Description: A nonequilibrium continuum mixture model has been incorporated into the CTH shock physics code to describe deflagration-to-detonation transition in granular energetic materials. This approach treats multiple thermodynamic and mechanics fields including the effects of relative material motion, rate-dependent compaction and interphase exchange of mass, momentum and energy. A finite volume description is formulated and internal state variables are solved using an operator-splitting method. Numeric… more
Date: August 1, 1995
Creator: Baer, M. R.; Hertel, E. S. & Bell, R. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Technical evaluation report for the demonstration of radio frequency soil decontamination at Site S-1

Description: The Air Force`s Armstrong Laboratory at Tyndall Air Force Base, Florida, has supported the research and development of Radio Frequency Soil Decontamination. Radio frequency soil decontamination is essentially a heat-assisted soil vapor extraction process. Site S-1 at Kelly Air Force Base, San Antonio, Texas, was selected for the demonstration of two patented techniques. The site is a former sump that collected spills and surface run-off from a waste petroleum, oils, and lubricants and solvent s… more
Date: April 1, 1995
Creator: Lyon, Chesley R.; Blanchard, Clifton F. & Whitt, Laura H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Geomorphology of plutonium in the Northern Rio Grande

Description: Nearly all of the plutonium in the natural environment of the Northern Rio Grande is associated with soils and sediment, and river processes account for most of the mobility of these materials. A composite regional budget for plutonium based on multi-decadal averages for sediment and plutonium movement shows that 90 percent of the plutonium moving into the system is from atmospheric fallout. The remaining 10 percent is from releases at Los Alamos. Annual variation in plutonium flux and storage … more
Date: March 1, 1993
Creator: Graf, William L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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