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Design of a pulsed switching magnet for the Bevalac

Description: The design and construction of a water cooled, pulsed, laminated core dipole magnet which has recently been installed at the Bevalac is described. This new, energy efficient magnet was funded by the DOE In-House Energy Management Program. The magnet has been specifically designed for maximum efficiency in power utilization and has replaced two dc powered magnets in the Bevalac switchyard. It will reduce energy usage by 747 MWh/yr, and it provides the capability of pulse-to-pulse switching in 0.… more
Date: March 1, 1989
Creator: Abbott, S.; Alonso, J.; Brown, J.; Kalnins, J.; Krebs, G. & Reimers, R.
Partner: UNT Libraries Government Documents Department
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Design of an integrally formed RFQ

Description: The design, construction and testing of a 410 MHz RFQ utilizing a new mechanical design concept has been completed at LBL. The RFQ is planned to be used at the Bevatron for injecting protons into the present heavy ion linac. The integral vane-cavity construction is a significant and unique feature of this RFQ design, wherein four walls with integral vanes are assembled to form the RFQ geometry. This design concept provides the capability of achieving precision vane alignment in minimal assembly… more
Date: March 1, 1989
Creator: Abbott, S.; Caylor, R.; Gough, R.; Howard, D.; MacGill, R. & Staples, J.
Partner: UNT Libraries Government Documents Department
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Beam-based alignment technique for the SLC (Stanford Linear Collider) linac

Description: Misalignment of quadrupole magnets and beam position monitors (BPMs) in the linac of the SLAC Linear Collider (SLC) cause the electron and positron beams to be steered off-center in the disk-loaded waveguide accelerator structures. Off-center beams produce wakefields which limit the SLC performance at high beam intensities by causing emittance growth. Here, we present a general method for simultaneously determining quadrupole magnet and BPM offsets using beam trajectory measurements. Results fr… more
Date: March 1, 1989
Creator: Adolphsen, C. E.; Lavine, T. L.; Atwood, W. B.; Himel, T. M.; Lee, M. J.; Mattison, T. S. et al.
Partner: UNT Libraries Government Documents Department
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The Mark II Vertex Drift Chamber

Description: We have completed constructing and begun operating the Mark II Drift Chamber Vertex Detector. The chamber, based on a modified jet cell design, achieves 30 {mu}m spatial resolution and <1000 {mu}m track-pair resolution in pressurized CO{sub 2} gas mixtures. Special emphasis has been placed on controlling systematic errors including the use of novel construction techniques which permit accurate wire placement. Chamber performance has been studied with cosmic ray tracks collected with the chamber… more
Date: March 1, 1989
Creator: Alexander, J. P.; Baggs, R.; Fujino, D.; Hayes, K.; Hoard, C.; Hower, N. et al.
Partner: UNT Libraries Government Documents Department
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Relativistic klystrons

Description: Experimental work is underway by a SLAC-LLNL-LBL collaboration to investigate the feasibility of using relativistic klystrons as a power source for future high gradient accelerators. Two different relativistic klystron configurations have been built and tested to date: a high grain multicavity klystron at 11.4 GHz and a low gain two cavity subharmonic buncher driven at 5.7 GHz. In both configurations power is extracted at 11.4 GHz. In order to understand the basic physics issues involved in ext… more
Date: March 1, 1989
Creator: Allen, M. A.; Azuma, O.; Callin, R. S.; Deruyter, H.; Eppley, K. R.; Fant, K. S. et al.
Partner: UNT Libraries Government Documents Department
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Reliability and lifetime predictions of SLC klystrons

Description: The energy upgrade of SLAC, with the first of the new 67 MW SLAC Linear Collider (SLC) klystrons, began over four years ago. Today there are over 200 of these klystrons in operation. As a result, there is a wealth klystron performance and failure information that enables reasonable predictions to be made on life expectancy and reliability. Data from initial tests, follow-up tests and daily operation monitoring on the accelerator is stores for analysis. Presented here are life expectancy predict… more
Date: March 1, 1989
Creator: Allen, M. A.; Callin, R. S.; Fowkes, W. R.; Lee, T. G. & Vlieks, A. E.
Partner: UNT Libraries Government Documents Department
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Plasma compensation effects with relativistic electron beams

Description: A sufficiently dense plasma can neutralize the current of a high energy lepton beam propagating through it. We have studied an e/sup +/-e/sup /minus// linear collider design with this plasma compensation and found that high luminosities can be obtained without going to nanometer beam sizes currently being discussed. We have also studied the consequence of compensation on B-factory design. One severe limitation on such plasma based device which has not been thoroughly examined is the background … more
Date: March 1, 1989
Creator: Autin, B.; Sessler, A. M. & Whittum, D. H.
Partner: UNT Libraries Government Documents Department
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Bunch lengthening calculations for the SLC (Stanford Linear Collider) damping rings

Description: The problem of bunch lengthening in electron storage rings has been treated by many people, and there have been many experiments. In the typical experiment, the theory is used to determine the impedance of the ring. What has been lacking thus far, however, is a calculation of bunch lengthening that uses a carefully calculated ring impedance (or wakefield). In this paper we begin by finding the potential well distortion due to some very simple impedance models, in order to illustrate different t… more
Date: March 1, 1989
Creator: Bane, K. L. F. & Ruth, R. D.
Partner: UNT Libraries Government Documents Department
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The search for the top quark

Description: This paper discusses the following topics: top search in the near future, general remarks, top search at HERA, searching for the top quarks at the Z/sup 0/ machines, finding the top at Lep II, top search in UA2, top search in UA1, and top search at CDF. 58 refs., 38 figs.
Date: March 1, 1989
Creator: Barbaro-Galtieri, A.
Partner: UNT Libraries Government Documents Department
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Comments on Reservoir Technology, DOE PR VII, San Francisco, March 23, 1989

Description: My assignment is to give feedback on the Reservoir Technology Task portion of the DOE-sponsored work we've been hearing about. Briefly, you've done well in adapting to an increasingly tough budgetary and political environment. More specifically, I'd like to highlight some of the encouraging developments in the context of overall research strategy. Ted Mock on Tuesday and Ken Nemzer at yesterday's luncheon made several useful observations and I'd like to refer to just two in relation to Reservoi… more
Date: March 21, 1989
Creator: Barker, B.J.
Partner: UNT Libraries Government Documents Department
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Hot Dry Rock Overview at Los Alamos

Description: The Hot Dry Rock (HDR) geothermal energy program is a renewable energy program that can contribute significantly to the nation's balanced and diversified energy mix. Having extracted energy from the first Fenton Hill HDR reservoir for about 400 days, and from the second reservoir for 30 days in a preliminary test, Los Alamos is focusing on the Long Term Flow Test and reservoir studies. Current budget limitations have slowed preparations thus delaying the start date of that test. The test is pla… more
Date: March 21, 1989
Creator: Berger, Michael & Hendron, Robert H.
Partner: UNT Libraries Government Documents Department
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Advanced Binary Geothermal Power Plancts Working Fluid Property Determination and Heat Exchanger Design

Description: The performance of binary geothermal power plants can be improved through the proper choice of a working fluid, and optimization of component designs and operating conditions. This paper reviews the investigations at the Idaho National Engineering Laboratory (INEL) which are examining binary cycle performance improvements: for moderate temperature (350 to 400 F) resources with emphasis on how the improvements may be integrated into design of binary cycles. These investigations are examining per… more
Date: March 21, 1989
Creator: Bliem, C.J. & Mines, G.L.
Partner: UNT Libraries Government Documents Department
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Analytical solutions to SSC coil end design

Description: As part of the SCC magnet effort, Fermilab will build and test a series of one meter model SSC magnets. The coils in these magnets will be constructed with several different end configurations. These end designs must satisfy both mechanical and magnetic criteria. Only the mechanical problem will be addressed. Solutions will attempt to minimize stresses and provide internal support for the cable. Different end designs will be compared in an attempt to determine which is most appropriate for the … more
Date: March 1, 1989
Creator: Bossert, R. C.; Brandt, J. S.; Carson, J. A.; Fulton, H. J.; Lee, G. C. & Cook, J. M.
Partner: UNT Libraries Government Documents Department
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SSC (Superconducting Super Collider) magnet mechanical interconnections

Description: Installation of superconducting accelerator dipole and quadrupole magnets and spool pieces in the SSC tunnel requires the interconnection of the cryostats. The connections are both of an electrical and mechanical nature. The details of the mechanical connections are presented. The connections include piping, thermal shields and insulation. There are seven piping systems to be connected. These systems must carry cryogenic fluids at various pressures or maintain vacuum and must be consistently le… more
Date: March 1, 1989
Creator: Bossert, R. C.; Niemann, R. C.; Carson, J. A.; Ramstein, W. L.; Reynolds, M. P. & Engler, N. H.
Partner: UNT Libraries Government Documents Department
open access

The Systematics of the Deexcitation of Hot Nuclei and the Onset of Multibody Decay

Description: Results from the asymmetric reactions 80 and 100 MeV/uLa + C are presented and compared to earlier work with the same system at 18 and 50 MeV/u. Fragment-fragment correlations, cross sections, and distributions in velocity space indicate the continued dominance of a quasi-binary decay mechanism with increased emission of light charged particles. The distributions in velocity also indicate a progression toward a ''fireball'' type of reaction mechanism. However, the angular distributions of the e… more
Date: March 1, 1989
Creator: Bowman, D. R.; Peaslee, G. F.; Colonna, N.; McMahan, M. A.; Han, H.; Jing, K. et al.
Partner: UNT Libraries Government Documents Department
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Reservoir Modeling for Production Management

Description: For both petroleum and geothermal resources, many of the reservoirs are fracture dominated--rather than matrix-permeability controlled. For such reservoirs, a knowledge of the pressure-dependent permeability of the interconnected system of natural joints (i.e., pre-existing fractures) is critical to the efficient exploitation of the resource through proper pressure management. Our experience and that reported by others indicates that a reduction in the reservoir pressure sometimes leads to an o… more
Date: March 21, 1989
Creator: Brown, Donald W.
Partner: UNT Libraries Government Documents Department
open access

Ion beam modification of the Y-Ba-Cu-O system with the MEVVA high current metal ion source

Description: We have used high-dose metal ion implantation to 'fine tune' the composition of Y-Ba-Cu-O thin films. The films were prepared by either of two rf sputtering systems. One system uses three modified Varian S-guns capable of sputtering various metal powder targets; the other uses reactive rf magnetron sputtering from a single-mixed-oxide stoichiometric solid target. Film thickness was typically in the range 2000--5000 A. Substrates of magnesium oxide, zirconia-buffered silicon, and strontium titan… more
Date: March 1, 1989
Creator: Brown, I. G.; Rubin, M. D.; Yu, K. M.; Mutikainen, R. & Cheung, N. W.
Partner: UNT Libraries Government Documents Department
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Deep Borehole Measurements for Characterizing the Magma/Hydrothermal System at Long Valley Caldera, CA

Description: The Magma Energy Program of the Geothermal Technology Division is scheduled to begin drilling a deep (6 km) exploration well in Long Valley Caldera, California in 1989. The drilling site is near the center of the caldera which is associated with numerous shallow (5-7 km) geophysical anomalies. This deep well will present an unparalleled opportunity to test and validate geophysical techniques for locating magma as well as a test of the theory that magma is still present at drillable depths withi… more
Date: March 21, 1989
Creator: Carrrigan, Charles R.
Partner: UNT Libraries Government Documents Department
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SSC (Superconducting Super Collider) dipole coil production tooling

Description: Superconducting Super Collider dipole coils must be produced to high precision to ensure uniform prestress and even conductor distribution within the collared coil assembly. Tooling is being prepared at Fermilab for the production of high precision 1M and 16.6M SSC dipole coils suitable for mass production. The design and construction methods builds on the Tevatron tooling and production experience. Details of the design and construction methods and measured coil uniformity of 1M coils will be … more
Date: March 1, 1989
Creator: Carson, J. A.; Barczak, E. J.; Bossert, R. C.; Brandt, J. S. & Smith, G. A.
Partner: UNT Libraries Government Documents Department
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Electroweak symmetry breaking studies at the pp colliders of the 1990's and beyond

Description: Within the conventional framework of a spontaneously broken gauge theory, general principles establish that the electroweak symmetry is broken by a new force that may be weak with associated new quanta below 1 TeV or strong with quanta above 1 TeV. The SSC parameters, ..sqrt..s = 40 TeV and L = 10/sup 33/ cm/sup /minus/2/s/sup /minus/1/, define a minimal facility with assured capability to observe the signals of symmetry breaking by a strong force above 1 TeV. Foreseeable luminosity upgrades wo… more
Date: March 8, 1989
Creator: Chanowitz, Michael S.
Partner: UNT Libraries Government Documents Department
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Understanding and improving the high field orbit in the Fermilab Booster

Description: With the implementation of the BPM system in the Fermilab Booster, complete survey data of the main magnets have been employed to determine magnet moving schemes to correct the high field orbit at 8 GeV kinetic energy and to understand the global pattern of the high field orbit in both planes. Considerable success has been achieved in the former task. We also obtained reasonable understanding in the later effort, given the multitude of factors that have to be dealt with. In this paper an accoun… more
Date: March 1, 1989
Creator: Chao, Y.; Ketcham, L. & Moore, C.D.
Partner: UNT Libraries Government Documents Department
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Relativity: X-ray and auger transitions of highly charged ions

Description: Many-electron QED correction is one of the unsolved problems in relativistic atomic structure calculations for many-electron systems. The accuracy of the effective-charged screening approach frequently used in the MCDF model to estimate the many-electron QED corrections is examined. The effects of relativity and configuration interaction are simultaneously important in the treatment of highly-charged ions. These effects can sometimes change the transition rates by orders of magnitude; numerous … more
Date: March 6, 1989
Creator: Chen, Mau Hsiung
Partner: UNT Libraries Government Documents Department
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Influence of the synchrotron radiation on particle dynamics in a rectangular undulator

Description: This paper is concerned with the synchrotron radiation from an undulating electron beam in a rectangular waveguide. It is shown analytically and numerically that the radiated energy spectrum may differ significantly from the free space result when the undulator length divided by the Lorentz factor of the electron beam is larger than the transverse size of the waveguide. The undulator radiation is identified with the awake field in beam instabilities. The concepts of wake function and impedance … more
Date: March 1, 1989
Creator: Chin, Yong Ho
Partner: UNT Libraries Government Documents Department
open access

Thermal aging of some decommissioned reactor components and methodology for life prediction

Description: Since a realistic aging of cast stainless steel components for end-of-life or life-extension conditions cannot be produced, it is customary to simulate the thermal aging embrittlement by accelerated aging at /approximately/400/degree/C. In this investigation, field components obtained from decommissioned reactors have been examined after service up to 22 yr to provide a benchmark of the laboratory simulation. The primary and secondary aging processes were found to be identical to those of the l… more
Date: March 1, 1989
Creator: Chung, H.M.
Partner: UNT Libraries Government Documents Department
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