Density and fluctuation profiles obtained with the D-band reflectometer in Tore-Supra
Up to now, density measurements in Tore-Supra using the reflectometry was available in the low field side (LFS). These measurements were achieved by two fast sweeps reflectometers covering the 50-110 GHZ bands. In addition, a reflectometer has been set up in order to study density fluctuations in the core and in the high field side (HFS) using the 105-155 GHZ band. A recent upgrade on this reflectometer allows it to perform fluctuations measurements at fixed frequency and density profiles in the same shot by switching between frequency steps and fast sweeps. Density profiles covering the whole plasma using the 3 reflectometers are presented. The filtering treatments are described. The better knowledge of the core and HFS density allows a higher reliability in fluctuations measurements: both for the localisation of the cut off layers and for the evaluation of the local index gradient length. Density fluctuation profiles enhanced by these new density profiles are shown.
Bibliographic Reference: An oral paper given at: 7th International Reflectometry Workshop for Fusion Plasma Diagnostics Organised by: Max-Planck-Institut für Plasmaphysik, Garching (DE) Held at: Max-Planck-Institut für Plasmaphysik, Garching (DE);
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, FranceL%Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: firstname.lastname@example.org
Record Number: 200518265 / Last updated on: 2005-07-26
Original language: en
Available languages: en