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Automated explosive pellet manufacturing using a PDP-14 programmable controller

Description: A Digital Equipment Corporation PDP-14 Industrial Programmable Controller was employed to provide automatic, closed-loop control for an explosive pellet manufacturing system at Mound Laboratory. Programmable controllers allow the application of sophisticated and flexible control, through programming. Advantages of the PDP-14 controller are ease of installation and maintenance, capability for modular expansion, and immunity to electrical noise. Safety requirements were met by using new technique… more
Date: October 29, 1976
Creator: Page, D. O.
Partner: UNT Libraries Government Documents Department
open access

Generalized ponderomotive forces and three-wave interaction

Description: A unified Hamiltonian approach to the theory of nonlinear interactions among waves and particles is discussed. The unifying feature of the approach is a generalization of the concept of pondermotive force. The usual method of time averaging is replaced by a canonical transformation. The transformation is designed to eliminate the terms in the Hamiltonian of a particle which are linear in the wave potentials, replacing them with bilinear terms at combination frequencies. An oscillation center ap… more
Date: April 29, 1976
Creator: Johnston, S. & Kaufman, A. N.
Partner: UNT Libraries Government Documents Department
open access

Calculated and measured efficiency of a man-portable /sup 3/He neutron detector

Description: A small man-portable neutron detector was constructed using 18 /sup 3/He proportional counters arranged in three layers within a polyethylene moderator. Each counter is 25 mm in diameter by 340 mm long (sensitive length) and is filled with highly-purified /sup 3/He to a pressure of 400 kPa (4 atm). Efficiency measurements were made using a /sup 252/Cf neutron source. Detailed calculations of the detector efficiency were done using the TART Monte Carlo transport code. Calculations and measuremen… more
Date: September 29, 1976
Creator: O'Dell, A. A.
Partner: UNT Libraries Government Documents Department
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