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Title: Columbia Torus II design report. [Mechanical and electrical properties]

Abstract

Torus II was designed to generate a hot (greater than or equal to 100 eV) plasma for purposes of doing research on high-beta MHD stability and equilibrium problems in axisymmetric toroidal geometry. Programming of the Torus II fields is shown. The sequence of events can be divided into (a) preionization phase, (b) preheating phase, and (c) hot, high-beta tokamak phase. Some mechanical and electrical design features are described. The capacitor bank system is also described. (MOW)

Publication Date:
Research Org.:
Columbia Univ., New York (USA). Plasma Physics Research Lab.
OSTI Identifier:
7216289
Report Number(s):
COO-2456-41
TRN: 77-011181
DOE Contract Number:
EY-76-S-02-2456.A001
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TORUS-II TOKAMAK; DESIGN; CAPACITORS; MAGNETIC FIELD CONFIGURATIONS; OPERATION; POWER SUPPLIES; CLOSED PLASMA DEVICES; ELECTRICAL EQUIPMENT; ELECTRONIC EQUIPMENT; EQUIPMENT; THERMONUCLEAR DEVICES; TOKAMAK DEVICES; 700200* - Fusion Energy- Fusion Power Plant Technology

Citation Formats

Not Available. Columbia Torus II design report. [Mechanical and electrical properties]. United States: N. p., 1977. Web. doi:10.2172/7216289.
Not Available. Columbia Torus II design report. [Mechanical and electrical properties]. United States. doi:10.2172/7216289.
Not Available. Sat . "Columbia Torus II design report. [Mechanical and electrical properties]". United States. doi:10.2172/7216289. https://www.osti.gov/servlets/purl/7216289.
@article{osti_7216289,
title = {Columbia Torus II design report. [Mechanical and electrical properties]},
author = {Not Available},
abstractNote = {Torus II was designed to generate a hot (greater than or equal to 100 eV) plasma for purposes of doing research on high-beta MHD stability and equilibrium problems in axisymmetric toroidal geometry. Programming of the Torus II fields is shown. The sequence of events can be divided into (a) preionization phase, (b) preheating phase, and (c) hot, high-beta tokamak phase. Some mechanical and electrical design features are described. The capacitor bank system is also described. (MOW)},
doi = {10.2172/7216289},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1977},
month = {Sat Jan 01 00:00:00 EST 1977}
}

Technical Report:

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  • The ionization, heating and subsequent long-time-scale behavior of the helium plasma in the Columbia fusion device, Torus-II, is studied. The purpose of this work is to perform numerical simulations while maintaining a high level of interaction with experimentalists. The device is operated as a toroidal z-pinch to prepare the gas for heating. This ionization of helium is studied using a zero-dimensional, two-fluid code. It is essentially an energy balance calculation that follows the development of the various charge states of the helium and any impurities (primarily silicon and oxygen) that are present. The code is an atomic physics model ofmore » Torus-II. In addition to ionization, we include three-body and radiative recombination processes.« less
  • A study was made of nondestructively testing silicon carbide by density uniformity, dynamic modulus by sonic technique, x-ray diffraction under transverse load, electrical resistivity, and internal friction. Dynamic modulus of silicon carbide was experimentally determined at 80 and 2200 deg F. Modulus of rupture tests were conducted at 80, 22D0, and 2400 deg F. The variability of the properties of the silicon carbide and the lack of sinnple correlations between the properties and geometry require the use of a statistical approach to correlate mechanical properties and geometry. A theoretical analysis is presented on the effect of specimen size, surface finish,more » and methods of loading on the strength properties of sllicon carbide. Available literature and manufacturer's property data for various types and forms of commercially available silicon carbide are tabulated. Various areas of possible application of silicon carbide in aircraft and missiles and design parameters for leading edge applications are given. (auth)« less
  • The EBT-P Microwave System provides microwaves for electron cyclotron resonance heating (ECRH) to both stabilize and heat the EBT-P plasma. A 28 gigahertz (GHz) system is required to form the hot electron annulus plasma that provides MHD stabilization to the core plasma. A 60 GHz system is required to heat the core plasma and will provide some second harmonic heating of the hot electron annulus. The principal microwave system elements and their design characteristics are summarized. The microwave system includes 200 kilowatt (kW) gyrotrons at 60 GHz for core heating and 200 kW gyrotrons at 28 GHz for annulus heating.more » The basic operating complement will be six (6) 60 GHz tubes and two (2) 28 GHz tubes. PACE (Plant and Capital Equipment) procurement will include four (4) 60 GHz gyrotrons with two (2) GHz tubes procured under operations and the two (2) 28 GHz tubes will be provided, with mounts, from the EBT-S program. Each tube is rigidly mounted on an oil filled tank assembly which provides electrical isolation and cooling. All tubes and mounts will be located in the lower level of the torus enclosure. An extensive demineralized water flow system is required to provide gyrotron cooling.« less
  • During Title I, General Dynamics' principal role as a subcontractor to the McDonnell Douglas Astronautics Company (MDAC) is to assist in the further development of a low-cost superconducting magnet mirror coil system for the EBT-P program consistent with long life and dependable operation. The activity can best be defined as an extension of ORNL's previous development program with further joint ORNL/MDAC/GDC refining of the mirror coil components. MDAC/GDC participation for the entire program can be subdivided into four distinct elements as follows: (1) design, development, and fabrication of two dewar subassemblies to enclose the ORNL developed and fabricated cold massmore » assemblies; (2) design, development, and fabrication of a production prototype magnet system including conductor (procurement), cold mass components, dewar and x-ray shield. This prototype would form the basis for the production of 36 magnets for the torus and three spares. (3) design, development, and fabrication of an electrical/electronic system including quench protection, instrumentation and control, and power supply to power and protect the mirror coil system during its operation in the torus; (4) fabrication of the 39 production magnets.« less