Locked modes and magnetic field errors in MST

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Description

In the MST reversed field pinch magnetic oscillations become stationary (locked) in the lab frame as a result of a process involving interactions between the modes, sawteeth, and field errors. Several helical modes become phase locked to each other to form a rotating localized disturbance, the disturbance locks to an impulsive field error generated at a sawtooth crash, the error fields grow monotonically after locking (perhaps due to an unstable interaction between the modes and field error), and over the tens of milliseconds of growth confinement degrades and the discharge eventually terminates. Field error control has been partially successful in ... continued below

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Pages: (24 p)

Creation Information

Almagri, A. F.; Assadi, S.; Prager, S. C.; Sarff, J. S. & Kerst, D. W. June 1, 1992.

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Description

In the MST reversed field pinch magnetic oscillations become stationary (locked) in the lab frame as a result of a process involving interactions between the modes, sawteeth, and field errors. Several helical modes become phase locked to each other to form a rotating localized disturbance, the disturbance locks to an impulsive field error generated at a sawtooth crash, the error fields grow monotonically after locking (perhaps due to an unstable interaction between the modes and field error), and over the tens of milliseconds of growth confinement degrades and the discharge eventually terminates. Field error control has been partially successful in eliminating locking.

Physical Description

Pages: (24 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • Other: DE92015379
  • Report No.: DOE/ER/53198-197
  • Grant Number: FG02-85ER53198
  • DOI: 10.2172/5187787 | External Link
  • Office of Scientific & Technical Information Report Number: 5187787
  • Archival Resource Key: ark:/67531/metadc1053195

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • June 1, 1992

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

Description Last Updated

  • March 23, 2018, 3:01 p.m.

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Almagri, A. F.; Assadi, S.; Prager, S. C.; Sarff, J. S. & Kerst, D. W. Locked modes and magnetic field errors in MST, report, June 1, 1992; Madison, Wisconsin. (digital.library.unt.edu/ark:/67531/metadc1053195/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.