Electron temperature diagnostics in Next Step tokamaks using synchrotron radiation
This report investigates the emission of cyclotron/synchrotron radiation at arbitrary frequency for diagnostic purposes in hot plasmas. Using ITER relevant parameters it is found that, for central electron temperature T(e) > 15 keV, second harmonic emission is strongly affected by harmonic overlap in a wide central plasma region and is therefore unsuitable for local temperature measurements. A modified method of plasma temperature diagnostic using high frequency emission at omega much greater than 2 omega(c) is discussed, and it is shown that the temperature of the central region can be inferred from X-mode emission normal to the magnetic field in the equatorial plane.
Bibliographic Reference: Report: EUR-CEA-FC-1513 EN (1994) 20 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199411058 / Last updated on: 1994-11-28
Original language: en
Available languages: en