Journal ArticleDOI
Active beam spectroscopy diagnostics for ITER: Present status (invited)
A. Malaquias,M. von Hellermann,S. Tugarinov,Ph. Lotte,N. C. Hawkes,Mattias Kuldkepp,Elisabeth Rachlew,A Gorshkov,Chris Walker,A.E. Costley,George Vayakis +10 more
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In this paper, an overview of the active beam spectroscopy diagnostics for the ITER was presented, where the authors showed that the mirror based periscopes and the impurity coating of the first mirror affect the signal strength and the polarization characteristics of the measured spectra having an impact in the measurement accuracy.Abstract:
An overview is given of the present design of the active beam spectroscopy diagnostics for the ITER. Present spatial resolution and signal-to-noise indicate that, in principle, all proposed measurements are possible covering the entire plasma minor radius. Calculations show that the mirror based periscopes and the impurity coating of the first mirror affect the signal strength and the polarization characteristics of the measured spectra having an impact in the measurement accuracy. On-line calibration techniques and methods to access the first mirror status are addressed.read more
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Chapter 7: Diagnostics
A. J. H. Donné,A. E. Costley,Robin Barnsley,Henrik Bindslev,R. L. Boivin,Garrard Conway,R. K. Fisher,R. Giannella,H. J. Hartfuss,M. von Hellermann,E.R. Hodgson,L. C. Ingesson,Kiyoshi Itami,David Johnson,Yasunori Kawano,Takashi Kondoh,A. V. Krasilnikov,Yoshinori Kusama,Andrey Litnovsky,Ph. Lotte,P. Nielsen,Takeo Nishitani,F. Orsitto,Byron J. Peterson,G. Razdobarin,J. Sánchez,Mamiko Sasao,Tatsuo Sugie,George Vayakis,V. S. Voitsenya,K. Vukolov,Chris Walker,K. Young +32 more
TL;DR: In this paper, the authors describe the requirements for high reliability in the systems (diagnostics) that provide the measurements in the ITER environment, which is similar to those made on the present-day large tokamaks while the specification of the measurements will be more stringent.
Journal ArticleDOI
Chapter 12: Generic Diagnostic Issues for a Burning Plasma Experiment
TL;DR: This chapter considers generic issues affecting the implementation of diagnostics in a burning plasma experiment (BPX) and the development needs for diagnostics for these and concludes with an assessment of the present state of readiness of the diagnostic community for the detailed design and construction of a full diagnostic set for a BPX.
Journal ArticleDOI
Chapter 6: Active Spectroscopy
TL;DR: The use of an injected neutral beam -either a dedicated diagnostic beam or the main heating beams - to localize and enhance the spectroscopic measurements described in Chap. 5 has been exploited for a number of key physics measurements, in particular detailed profile information on ion parameters, the radial electric field, plasma current density, and turbulent transport.
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Diagnostics for steady state plasmas
TL;DR: In this article, problems arising from high power ECRH under conditions of incomplete absorption are discussed, and individual standard diagnostic systems are discussed to identify their specific problems as well as the opportunities connected with long pulse operation.
Journal ArticleDOI
Particle deposition and optical response of ITER Motional Stark Effect diagnostic first mirrors
TL;DR: In this paper, the first and second mirrors of the proposed motional Stark effect edge plasma current diagnostic for ITER were analyzed for optical diagnostic use in ITER and possibly for post-ITER high duty-factor reactors.
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Journal ArticleDOI
Chapter 1: Overview and summary
TL;DR: The ITER Physics Basis as mentioned in this paper presents and evaluates the physics rules and methodologies for plasma performance projections, which provide the basis for the design of a tokamak burning plasma device whose goal is to demonstrate the scientific and technological feasibility of fusion energy for peaceful purposes.
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30th EPS Conference on Controlled Fusion and Plasma Physics
R Koch,S. V. Lebedev +1 more
TL;DR: The 30th EPS Conference on Controlled Fusion and Plasma Physics took place in St Petersburg, Russian Federation, on 7th--11th July 2003 as mentioned in this paper, with a focus on high-energy plasmas.
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Conceptual design of the charge exchange recombination spectroscopy diagnostic for ITER
S. Tugarinov,A. Krasilnikov,V. Dokouka,R. Khayrutdinov,I. Beigman,I. Tolstikhina,L. Vainshtein,M. von Hellermann,A. Malaquias +8 more
TL;DR: Tugarinov et al. as discussed by the authors used active charge exchange recombination spectroscopy (CXRS) for the measurement of low-Z impurities in a fully diagnosed plasma to increase the overall data consistency and reduce the statistical error of each single impurity density determination.
Journal ArticleDOI
Self‐calibrating magnetic field diagnostics in beam emission spectroscopy
TL;DR: In this article, a complete static polarimetry scheme for magnetic field diagnostics in tokamaks using the motional Stark effect in fast neutral beams has been proposed, including the case where an in-vessel mirror with changing characteristics (coating by impurities) is placed in front of the optical detection system.