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Abstract

The latest status of �Active Beam� related spectroscopy aspects as part of the ITER diagnostic scenario is presented. A key issue of the proposed scheme is based on the concept that in order to achieve the ultimate goal of global data consistency all particles involved, that is, intrinsic and seeded impurity ions well as helium ash ions and bulk plasma ions and also the plasma background data (e.g. magnetic and electric fields, electron density and temperature profiles) need to be addressed. A further sensible step in this direction is the decision of exploiting both a dedicated low-energy, low-power diagnostic beam (DNB, 2.2MW 100 keV/amu) as well as the high-power, high-energy heating beams (HNB, 17MW 500keV/amu) for maximum diagnostic information.

The feasibility study encompasses CXRS (Charge Exchange Recombination Spectroscopy) for the measurement of the main impurity ion densities (including helium ash), ion temperatures and toroidal and poloidal plasma rotation. Beam Emission Spectroscopy (BES) is proposed as indispensable cross-calibration tool for absolute local impurity density measurements and also for the continuous monitoring of the neutral beam power deposition profile. Fluctuation measurements based on BES are considered for the plasma edge. Finally, a full exploitation of the �Motional Stark Effect� pattern is proposed to deduce pitch angles, radial electric fields and total magnetic fields.

Additional information

Authors: VON HELLERMANN M, Association Euratom-FOM. Rijnhuizen (NL);GIROUD C, Association Euratom-FOM. Rijnhuizen (NL);JASPERS R, Association Euratom-FOM. Rijnhuizen (NL);HAWKES N C, Association Euratom-UKAEA. Culham.(GB);O'MULLANE M, Association Euratom-UKAEA. Culham.(GB);ZASTROW K-D, Association Euratom-UKAEA. Culham.(GB);KRASILNIKOV A, SRC TRINITI, Troitsk (RU);TUGARINOV S, SRC TRINITI, Troitsk (RU);McKEE G, University of Wisconsin, Madison (US);MALAQUIAS A, Associacao Euratom I.S.T. , Lisboa (PT);RACHLEW E, Association Euratom-VR (KTH), Stockholm (SE);LOTTE P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An oral paper given at: 30th EPS Conference on Controlled Fusion and Plasma Physics Organised by: European Physical Society Held at: St Petersburg, Russia, July 7 - 11 2003
Availability: Available from Association EURATOM-CEA, Département de Recherches sur la Fusion Contrôlée, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: dirdrfc@drfc.cad.cea.fr
Record Number: 200417322 / Last updated on: 2004-01-26
Category: PUBLICATION
Original language: en
Available languages: en