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Abstract

The TCV tokamak under construction at CRPP has been designed to produce plasmas with an elongation of up to 3. Plasmas of this type can no longer be described using simple symmetry assumptions and, therefore, spatial profiles of the electron temperature and density need to be measured in more than one direction. A description is given of the Thomson scattering system for TCV which has been designed to meet its particular requirements and offer optimum flexibility for adaption to specific tasks. The capability to measure T(e) and N(e) profiles along two perpendicular directions should provide valuable information for studies of plasmas with non-circular cross sections. A computer controlled timing system is being designed which should allow the combination of several lasers to produce pulse sequences with variable time delays. Temporal resolution down to the sub-ms scale and synchronisation with external events are feasible.

Additional information

Authors: BEHN R, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH);PIETRZYK Z A, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH);NIESWAND C, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH)
Bibliographic Reference: Paper presented: 5th International Symposium on Laser-Aided Plasma Diagnostics, Bad Honnef (DE), Aug. 19-23, 1991
Availability: Available from (1) as Paper EN 36302 ORA
Record Number: 199111123 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en