Observation of tilt asymmetries in field-reversed configurations

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In recent years, part of the experimental effort on the FRX-C/LSM device has been devoted to understanding why good FRC confinement is observed only in a narrow window of the operating parameter space (fill pressures less than 5 mtorr and bias fields less than 0.8--0.9 kG). The transition from good to bad confinement has been shown for some time to correlate with strong axial shocks, suggesting a formation or stability problem. More recently, FRC magnetic asymmetries have been observed whenever the confinement was poor. To gain further understanding, a 64-coil probe array was built, and data from over 700 discharges ... continued below

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Pages: (6 p)

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Tuszewski, M.; Barnes, D.C.; Klingner, P. & Ng, Chung. January 1, 1989.

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Description

In recent years, part of the experimental effort on the FRX-C/LSM device has been devoted to understanding why good FRC confinement is observed only in a narrow window of the operating parameter space (fill pressures less than 5 mtorr and bias fields less than 0.8--0.9 kG). The transition from good to bad confinement has been shown for some time to correlate with strong axial shocks, suggesting a formation or stability problem. More recently, FRC magnetic asymmetries have been observed whenever the confinement was poor. To gain further understanding, a 64-coil probe array was built, and data from over 700 discharges were collected during the summer of 1989. We summarize in this paper the results of a preliminary analysis of these data. 5 refs., 4 figs.

Physical Description

Pages: (6 p)

Notes

NTIS, PC A02/MF A01; OSTI; INIS; GPO Dep.

Source

  • 11. US/Japan workshop on field-reversed configurations and compact toroids, Los Alamos, NM (USA), 7-9 Nov 1989

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  • Other: DE90007831
  • Report No.: LA-UR-90-28
  • Report No.: CONF-8911130--13
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5006887
  • Archival Resource Key: ark:/67531/metadc1059059

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  • January 1, 1989

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  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 2, 2018, 12:11 p.m.

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Tuszewski, M.; Barnes, D.C.; Klingner, P. & Ng, Chung. Observation of tilt asymmetries in field-reversed configurations, article, January 1, 1989; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1059059/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.