Method and apparatus for steady-state magnetic measurement of poloidal magnetic field near a tokamak plasma

PDF Version Also Available for Download.

Description

A method and apparatus for the steady-state measurement of poloidal magnetic field near a tokamak plasma, where the tokamak is configured with respect to a cylindrical coordinate system having z, phi (toroidal), and r axes. The method is based on combining the two magnetic field principles of induction and torque. The apparatus includes a rotor assembly having a pair of inductive magnetic field pickup coils which are concentrically mounted, orthogonally oriented in the r and z directions, and coupled to remotely located electronics which include electronic integrators for determining magnetic field changes. The rotor assembly includes an axle oriented in ... continued below

Physical Description

54 p.

Creation Information

Woolley, R.D. December 31, 1996.

Context

This patent is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times . More information about this patent can be viewed below.

Who

People and organizations associated with either the creation of this patent or its content.

Author

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this patent. Follow the links below to find similar items on the Digital Library.

Description

A method and apparatus for the steady-state measurement of poloidal magnetic field near a tokamak plasma, where the tokamak is configured with respect to a cylindrical coordinate system having z, phi (toroidal), and r axes. The method is based on combining the two magnetic field principles of induction and torque. The apparatus includes a rotor assembly having a pair of inductive magnetic field pickup coils which are concentrically mounted, orthogonally oriented in the r and z directions, and coupled to remotely located electronics which include electronic integrators for determining magnetic field changes. The rotor assembly includes an axle oriented in the toroidal direction, with the axle mounted on pivot support brackets which in turn are mounted on a baseplate. First and second springs are located between the baseplate and the rotor assembly restricting rotation of the rotor assembly about its axle, the second spring providing a constant tensile preload in the first spring. A strain gauge is mounted on the first spring, and electronic means to continually monitor strain gauge resistance variations is provided. Electronic means for providing a known current pulse waveform to be periodically injected into each coil to create a time-varying torque on the rotor assembly in the toroidal direction causes mechanical strain variations proportional to the torque in the mounting means and springs so that strain gauge measurement of the variation provides periodic magnetic field measurements independent of the magnetic field measured by the electronic integrators.

Physical Description

54 p.

Notes

OSTI as DE98007413

Source

  • Other Information: PBD: 1996

Language

Item Type

Identifier

Unique identifying numbers for this patent in the Digital Library or other systems.

  • Other: DE98007413
  • Report No.: PATENTS-US--A8718830
  • Grant Number: AC02-76CH03073
  • Office of Scientific & Technical Information Report Number: 663328
  • Archival Resource Key: ark:/67531/metadc707833

Collections

This patent is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

What responsibilities do I have when using this patent?

When

Dates and time periods associated with this patent.

Creation Date

  • December 31, 1996

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

Description Last Updated

  • Nov. 6, 2015, 4 p.m.

Usage Statistics

When was this patent last used?

Yesterday: 1
Past 30 days: 1
Total Uses: 11

Interact With This Patent

Here are some suggestions for what to do next.

Start Viewing

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Woolley, R.D. Method and apparatus for steady-state magnetic measurement of poloidal magnetic field near a tokamak plasma, patent, December 31, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc707833/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.