skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: SOME CALCULATIONS ON THE TRIAX PINCH DEVICE

Abstract

The hydromagnetic equations of motion for the Triax pinch are linearized by a perturbation expansion about equilibrium. The perturbed equations are then decomposed by the method of normal modes. A numerical calculation is made of the oscillation frequency for two specific modes (k=O, m = 0; and k = 0, m = l). The m =0, k = 0 mode is also analyzed by using a hydromagnetic energy principle. (auth)

Authors:
Publication Date:
Research Org.:
University of California, Lawrence Radiation Laboratory, Berkeley, CA
Sponsoring Org.:
US Atomic Energy Commission (AEC)
OSTI Identifier:
4107800
Report Number(s):
UCRL-9344
NSA Number:
NSA-15-008204
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-61
Country of Publication:
United States
Language:
English
Subject:
PHYSICS; DIFFERENTIAL EQUATIONS; FREQUENCY; KINK INSTABILITY; MAGNETOHYDRODYNAMICS; MOTION; OSCILLATIONS; PERTURBATION THEORY; PINCH; PLASMA; SAUSAGE INSTABILITY; STABILITY; THERMONUCLEAR DEVICES

Citation Formats

Fisher, S. SOME CALCULATIONS ON THE TRIAX PINCH DEVICE. United States: N. p., 1960. Web. doi:10.2172/4107800.
Copy to clipboard
Fisher, S. SOME CALCULATIONS ON THE TRIAX PINCH DEVICE. United States. doi:10.2172/4107800.
Copy to clipboard
Fisher, S. Mon . "SOME CALCULATIONS ON THE TRIAX PINCH DEVICE". United States. doi:10.2172/4107800. https://www.osti.gov/servlets/purl/4107800.
Copy to clipboard
@article{osti_4107800,
title = {SOME CALCULATIONS ON THE TRIAX PINCH DEVICE},
author = {Fisher, S},
abstractNote = {The hydromagnetic equations of motion for the Triax pinch are linearized by a perturbation expansion about equilibrium. The perturbed equations are then decomposed by the method of normal modes. A numerical calculation is made of the oscillation frequency for two specific modes (k=O, m = 0; and k = 0, m = l). The m =0, k = 0 mode is also analyzed by using a hydromagnetic energy principle. (auth)},
doi = {10.2172/4107800},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Aug 01 00:00:00 EDT 1960},
month = {Mon Aug 01 00:00:00 EDT 1960}
}
Copy to clipboard
Technical Report:
View Technical Report (0.80 MB)
DOI:  10.2172/4107800
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

  • ; ; ; ...
    The Triax device is a discharge tube in which a plasma carrying a current is pinched into the form of a cylinder between two concentric copper cylinders, each of which carries part of the return current. Such a geometry has attractive features from the standpoint of stability. An extensive study of the Triax discharge was carried out in which observations with magnetic probes, spectrographs, and efficient neutron detectors were combined with measurements of current and voltage to give much information on the behavior of the plasma. It is clearly established that a well-pinched sheet plasma is formed. Neutrons, up tomore » 2 x 10/sup 5/ per pulse, emerge in a short burst that coincides in time with the sudden appearance of strong light from impurities and also coincides with a peculiar bump in a plot of the voltage across the tube. The nature of the neutron production was not established, aad although certain arguments are presented that make it not inconceivable that it is thermonuclear, a search for a nonthermonuclear origin is continuing. The importance of a suitable auxiliary starting discharge in forming neutron-producing pinches with very high currents is brought out. Advances in the art of switching large currents are described. (auth)« less

  • The original project scope that was established in 2007 aimed to install a 1,700 meter (1.1 mile) medium voltage HTS Triax{TM} cable system into the utility grid in New Orleans, LA. In 2010, however, the utility partner withdrew from the project, so the 1,700 meter cable installation was cancelled and the scope of work was reduced. The work then concentrated on the specific barriers to commercialization of HTS cable technology. The modified scope included long-length HTS cable design and testing, high voltage factory test development, optimized cooling system development, and HTS cable life-cycle analysis. In 2012, Southwire again analyzed themore » market for HTS cables and deemed the near term market acceptance to be low. The scope of work was further reduced to the completion of tasks already started and to testing of the existing HTS cable system in Columbus, OH. The work completed under the project included: • Long-length cable modeling and analysis • HTS wire evaluation and testing • Cable testing for AC losses • Optimized cooling system design • Life cycle testing of the HTS cable in Columbus, OH • Project management. The 200 meter long HTS Triax{TM} cable in Columbus, OH was incorporated into the project under the initial scope changes as a test bed for life cycle testing as well as the site for an optimized HTS cable cooling system. The Columbus cable utilizes the HTS TriaxTM design, so it provided an economical tool for these of the project tasks.« less

  • ; ; ; ...
    The inverse triax diode is a high power, low impedance electron diode which offers significant advantages over conventional electron diodes on short-pulse (<30 ns FWHM) high power x-ray simulators. Parametric calculations show that the radiation efficiency of the inverse triax is competitive with standard diodes fro mean photon energies below about 120 keV, and sometimes up to 150 keV. Particle-in-cell code simulations show the impedance behavior and flow pattern in the inverse triax with and without the presence of an anode plasma. The simulation results are used to suggest design rules for inverse triax diodes. Experimental results show good agreementmore » with calculations of the impedance behavior and electron beam dynamics. Using inverse triax diodes, we have produced peak doses of 1.4 {times} 10{sup 11} rad(TLD)/s over 840 cm{sup 2} with a mean photon energy of 120 keV on SPEED and 3.1 {times} 10{sup 11} rad(TLD)/s over 3700 cm{sup 2} with a mean photon energy of 140 keV on Saturn. 20 refs., 16 figs.« less