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The perpendicular X-ray emission of runaway electrons with energies up to a few MeV has been measured in Joint European Torus (JET) low density ohmic discharges by means of the fast electron bremsstrahlung profile monitor. A diffusion model simulating the temporal evolution of the line integrated X-ray signals is used to determine the runaway radial transport coefficient in the central region of the plasma (D(r) approximately 0.2 m(2)/s for r/a below 0.5); a comparison is made with the predictions of magnetic and electrostatic turbulent transport theories and a lower limit on the level of radial magnetic field fluctuations is found.

Additional information

Authors: ESPOSITO B, Associazione Euratom-ENEA CRE, Frascati (IT);SOLIS R M, Universidad CarlosIII de Madrid (ES);VAN BELLE P ET AL, AEA Technology, Harwell Laboratory, Didcot, Oxon (GB);CECIL E, Colarado School ofMines, Golden (US);WATKINS N,
Bibliographic Reference: Article : Plasma Physics and Controlled Fusion (1995)
Record Number: 199512130 / Last updated on: 1996-01-15
Original language: en
Available languages: en