Measurement of the magnetic field in a spherical torus plasma via electron Bernstein wave emission harmonic overlap Journal Article uri icon



  • Measurement of the magnetic field in a spherical torus by observation of harmonic overlap frequencies in the electron Bernstein wave (EBW) spectrum has been previously suggested [V. F. Shevchenko, Plasma Phys. Rep. 26, 1000 (2000)]. EBW mode conversion to X-mode radiation has been studied in the Current Drive Experiment-Upgrade spherical torus (T. Jones, Ph.D. thesis, Princeton University, 1995) with emission measured at blackbody levels [B. Jones et al., Phys. Rev. Lett. 90, 165001 (2003)]. Sharp transitions in the thermally emitted EBW spectrum have been observed for the first two harmonic overlaps. These transition frequencies are determined by the magnetic field and electron density at the mode conversion layer in accordance with hot-plasma wave theory. Prospects of extending this measurement to higher harmonics, necessary in order to determine the magnetic field profile, and high-β equilibria are discussed for this proposed magnetic field diagnostic.

publication date

  • March 1, 2004

has restriction

  • closed

Date in CU Experts

  • February 19, 2015 2:56 AM

Full Author List

  • Jones B; Taylor G; Efthimion PC; Munsat T

author count

  • 4

Other Profiles

International Standard Serial Number (ISSN)

  • 1070-664X

Electronic International Standard Serial Number (EISSN)

  • 1089-7674

Additional Document Info

start page

  • 1028

end page

  • 1032


  • 11


  • 3