FRC formation studies with Z-discharge ionization on FRX-C

PDF Version Also Available for Download.

Description

Recent exploratory operation at high-bias levels on FRX-C is discussed. The motivation of these in situ formation studies was to explore the use of Z-discharge ionization (Z-PI) for achieving larger trapped poloidal flux and commensurately large x/sub s/ values, where x/sub s/ is the ratio of the separatrix radius r/sub s/ to the coil radius r/sub c/. Such studies are of interest in ascertaining predicted improvements of particle confinement and degradation of stability with the associated increase of anti s, the approximate number of ion gyroradii across the minor radius of the FRC. The results of these studies may be ... continued below

Physical Description

Pages: 6

Creation Information

Armstrong, W.T.; Chrien, R.E.; Hugrass, W.; Klingner, P.L.; McKenna, K.F.; Milroy, R.D. et al. January 1, 1985.

Context

This article 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. More information about this article can be viewed below.

Who

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

Publishers

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 article. Follow the links below to find similar items on the Digital Library.

Description

Recent exploratory operation at high-bias levels on FRX-C is discussed. The motivation of these in situ formation studies was to explore the use of Z-discharge ionization (Z-PI) for achieving larger trapped poloidal flux and commensurately large x/sub s/ values, where x/sub s/ is the ratio of the separatrix radius r/sub s/ to the coil radius r/sub c/. Such studies are of interest in ascertaining predicted improvements of particle confinement and degradation of stability with the associated increase of anti s, the approximate number of ion gyroradii across the minor radius of the FRC. The results of these studies may be summarized briefly as: (1) the Z-PI worked well in conjunction with conventional theta-PI to extend the level of trapped flux at high fill pressure (20 mtorr), but the Z-PI worked poorly at low fill pressure (5 mtorr), and (2) increased trapped flux at 5 mtorr quickly led to degradation of the flux lifetime and no significant increase in x/sub s/, while at 20 mtorr the initial value of x/sub s/ was increased significantly but with degraded flux lifetimes.

Physical Description

Pages: 6

Notes

NTIS, PC A02/MF A01.

Source

  • 7. US symposium on compact toroid research, Santa Fe, NM, USA, 21 May 1985

Language

Item Type

Identifier

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

  • Other: DE85012765
  • Report No.: LA-UR-85-1834
  • Report No.: CONF-8505100-9
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5709733
  • Archival Resource Key: ark:/67531/metadc1093013

Collections

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

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this article?

When

Dates and time periods associated with this article.

Creation Date

  • January 1, 1985

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

Description Last Updated

  • June 4, 2018, 1:37 p.m.

Usage Statistics

When was this article last used?

Congratulations! It looks like you are the first person to view this item online.

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Armstrong, W.T.; Chrien, R.E.; Hugrass, W.; Klingner, P.L.; McKenna, K.F.; Milroy, R.D. et al. FRC formation studies with Z-discharge ionization on FRX-C, article, January 1, 1985; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1093013/: accessed June 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.