Gerald E. Marsh – Page 12

A Class of Cylindrically Symmetric Solutions to the Force-Free Magnetic Field Equations with Non-Constant Alpha

Posted on January 1, 1990June 30, 2012Posted in Physics

J. Appl. Phys. Vol. 68, p. 3818 (1990) (PDF)

The general approach to cylindrically symmetric force-free magnetic fields first introduced by Lust and Schluter [Z. Astrophys. Vol. 34, 263 (1954)], is restricted to cylindrically symmetric fields, and subsequently used to determine a set of solutions to the force-free field equations with non-constant alpha. The first element of the set is the well known constant a solution of Lundquist [Ark. Fys. Vol. 2, 361 (1951)]. These solutions may have practical applications with respect to high-temperature superconductors.

A Simplified Anti-Submarine Warfare Problem Treated as a Steady-State Markov Process

Posted on January 1, 1988August 6, 2006Posted in Nuclear Policy, Physics

Applied Physics Communications Vol 8, p. 227 (1988)
Coauthor: Robert Piacesi
[A shortened version of this article also appeared in Physics & Society (January 1989)]

Markov processes represent a powerful method for quantifying questions related to the survivability of strategic nuclear forces. This paper gives an elementary introduction to Markow processes and chains followed by a simple anti-submarine warfare example in which the scenario of a surveillance-surge attack is treated as a steady state Markov process.

(MS Word Document)

Yields of US and Soviet Nuclear Tests

Posted on August 11, 1987March 9, 2007Posted in Nuclear Policy, Physics, Politics

Physics Today Vol. 40, p. 36 (August 1987) Part 1(PDF) Part 2 (PDF)
Coauthor: Jack Evernden

Failure to account properly for geological and seismological differences between the US and Soviet test sites has led to overestimates of Soviet tests and to incorrect claims of Soviet cheating on the treaty limit of 150 kilotons.

Accelerator System for a 1-Million Volt Scanning Transmission Electron Microscope

Posted on January 24, 1977February 17, 2007Posted in Physics

Reviews of Scientific Instruments, Vol 48, p. 841 (1977)

The accelerator, magnetic shielding-equipotential grading system, and voltage divider chain of the University of Chicago 1-MV STEM are described. A dynamical analysis of the system is presented in addition to a discussion of the problem of “electron loading” encountered while conditioning the accelerator tube.

(PDF)

Does a Gravitational Red Shift Necessarily Imply Space-Time Curvature?

Posted on March 1, 1975February 17, 2007Posted in Physics

American Journal of Physics, Vol. 43, p. 266 (1975)
Coauthor: Charles Nissim-Sabat

We show that no argument that attempts to infer space-time curvature solely from the gravitational red shift can be valid.

(PDF)

Uniform Magnetic Fields and the Problem of the Ellipsoid

Posted on February 19, 1975February 17, 2007Posted in Physics

Journal of Applied Physics, Vol. 46, p. 3178 (1975)

The problem of obtaining a uniform magnetic field within a nondegenerate ellipsoid by the use of an appropriate surface current distribution is solved.

(PDF)

Tetrads and the Gravitational-inertial Field

Posted on January 1, 1974August 18, 2010Posted in Physics

The tetrad formulation of general relativity allows a non-tensorial decomposition of the gravitational field into two components which have been thought to represent the permanent and inertial parts. It is shown here that this division does not hold for arbitrary motions in a flat space-time, and therefore cannot be expected to hold in more general spaces.

Aust. J. Phys. 27, 131 (1974)

Tetrads & Grav-Inertial Field