PRECISION OF ION TEMPERATURE MEASUREMENTS IN A TOKAMAK PLASMA USING COLLECTIVE THOMSON SCATTERING - A NUMERICAL STUDY
A numerical simulation has been performed to investigate the precision of a T(i) measurement of a tokamak plasma via collective Thomson scattering at 385 micron. The study is based on a parameter and data set referring to an experiment carried out at the TCA tokamak, using a pulsed D(2)O laser and a heterodyne receiver system. Apart from limitations due to the signal-to-noise ratio of the detection system, the influence of uncertainties in various plasma parameters required for the T(i) evaluation from a scattered spectrum are investigated. Typical relative errors of +- 25% have already been obtained, but careful optimisation of the system, taking into account the results of this study, together with further technical improvements, should enable this limit to be reduced to about +-10% for the plasma conditions considered.
Bibliographic Reference: REPORT: LRP 383/89 (1989) AVAILABLE FROM CONFEDERATION SUISSE, CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE, 21 AVENUE DES BAINS, CH-1007 LAUSANNE (CH)
Record Number: 1989128019700 / Last updated on: 1990-11-09
Available languages: en