Month

Construction of the Courant-Snyder invariants for the non-linear equations of motion under presence of the linear coupling (open access)

Construction of the Courant-Snyder invariants for the non-linear equations of motion under presence of the linear coupling

A single particle subjected to an arbitrary static magnetic field, which includes skew-quadrupole and solenoidal fields, is considered. The Courant-Snyder invariants are constructed, and the long-term stability of the beam in a storage ring is formulated in terms of the normal modes. The generalized Courant-Snyder invariants become Lyapunov functions when the new generalized B-functions admit non-zero lower and finite upper bounds.
Date: June 10, 1993
Creator: Garczynski, V.
Object Type: Report
System: The UNT Digital Library
Correction of longitudinal errors in accelerators for heavy-ion fusion (open access)

Correction of longitudinal errors in accelerators for heavy-ion fusion

Longitudinal space-charge waves develop on heavy-ion inertial-fusion pulse from initial mismatches or from inappropriately timed or shaped accelerating voltages. Without correction, waves moving backward along the beam can grow due to the interaction with their resistively retarded image fields, eventually degrading the longitudinal emittance. A simple correction algorithm is presented here that uses a time-dependent axial electric field to reverse the direction of backward-moving waves. The image fields then damp these forward-moving waves. The method is demonstrated by fluid simulations of an idealized inertial-fusion driver, and practical problems in implementing the algorithm are discussed.
Date: June 10, 1993
Creator: Sharp, W. M.; Callahan, D. A.; Barnard, J. J.; Langdon, A. B. & Fessenden, T. J.
Object Type: Article
System: The UNT Digital Library
Design bases: Bauxite-sulfuric acid feed facilities 100-K Area (open access)

Design bases: Bauxite-sulfuric acid feed facilities 100-K Area

This document defines the objective, bases, and functional requirements governing the preparation of detail design of the bauxite-sulfuric acid feed facilities to be installed in the 183-KE and KW buildings. These facilities will produce the chemical coagulant used in the treatment of Columbia River water in the water plants; they will replace existing liquid alum feed systems. The treated water will be used as reactor coolant.
Date: June 10, 1993
Creator: Etheridge, E. L.
Object Type: Report
System: The UNT Digital Library
A FET-switched induction accelerator cell (open access)

A FET-switched induction accelerator cell

In this study, we limited our questions to ORNL, discussing their models with almost a dozen staff members from four divisions. We collected some low-level data about the models, and also tried to gain a sense of the philosophy of the modeler, and how each model fit into the larger perspective of ORNL`s and the scientific community`s efforts. Time and budget prevented us from conducting any larger study, but we have no reason to suppose that conclusions about ORNL`s models and modelers could not be extended to the larger scientific community.
Date: June 10, 1993
Creator: Kirbie, H. C.; Cravey, W. R.; Hawkins, S. A.; Newton, M. A. & Ollis, C. W.
Object Type: Article
System: The UNT Digital Library
Momentum and coordinate space three-nucleon potentials (open access)

Momentum and coordinate space three-nucleon potentials

In this paper we give explicit formulae in momentum and coordinate space for the three-nucleon potentials due to {rho} and {pi} meson exchange, derived from off-mass-shell meson-nucleon scattering amplitudes which are constrained by the symmetries of QCD and by the experimental data. Those potentials have already been applied to nuclear matter calculations. Here we display additional terms which appear to be the most important for nuclear structure. The potentials are decomposed in a way that separates the contributions of different physical mechanisms involved in the meson-nucleon amplitudes. The same type of decomposition is presented for the {pi} {minus} {pi} TM force: The {Delta} isobar, the chiral symmetry breaking and the nucleon pair terms are isolated.
Date: June 10, 1993
Creator: Coon, S. A. & Pena, M. T.
Object Type: Report
System: The UNT Digital Library
Petroleum marketing monthly, June 1993 (open access)

Petroleum marketing monthly, June 1993

This publication is designed to give information and statistical data about a variety of crude oils and refined petroleum products. The publication provides statistics on crude oil costs and refined petroleum products sales for use by industry, government, private sector analysts, educational institutions, and consumers. Data on crude oil include the domestic first purchase price, the f.o.b. and landed cost of imported crude oil, and the refiners` acquisition cost of crude oil. Sales data for motor gasoline, distillates, residuals, aviation fuels, kerosene, and propane are presented.
Date: June 10, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Research in accelerator physics (Theory). Final technical report, May 15, 1992--May 14, 1993 (open access)

Research in accelerator physics (Theory). Final technical report, May 15, 1992--May 14, 1993

Work during the period November 1, 1992 through May 14, 1993 emphasized the following topics: final test of HESQ as a transport element at the SSC, analytical studies of Taylor maps for symplectic systems, and physics of magnet sorting in large rings. Earlier work has already been reported.
Date: June 10, 1993
Creator: Ohnuma, S.
Object Type: Report
System: The UNT Digital Library
Research in accelerator physics (Theory). [The Univ. of Houston, Houston, Texas] (open access)

Research in accelerator physics (Theory). [The Univ. of Houston, Houston, Texas]

Work during the period November 1, 1992 through May 14, 1993 emphasized the following topics: final test of HESQ as a transport element at the SSC, analytical studies of Taylor maps for symplectic systems, and physics of magnet sorting in large rings. Earlier work has already been reported.
Date: June 10, 1993
Creator: Ohnuma, S.
Object Type: Report
System: The UNT Digital Library