New tokamak physics and next step devices versus present limits of diagnostics (invited)

F. Orsitto

Research output: Contribution to journalArticle

Abstract

In recent years the necessity of understanding the physics concerning new tokamak results has clearly shown the limits of the actual diagnostic capability of existing devices, in terms of reliability, precision, spatial localization, and temporal resolution of measurements. This appears even more evident when next-step tokamak devices are considered. For example, the formation and evolution of the plasma internal transport barriers and the regulation of its positions by a detailed tailoring of the current spatial profile and plasma heating gives demanding requests to a complex set of diagnostics including motional Stark effect as well as incoherent Thomson scattering (ITS). The measurement of detachment of plasma in a divertor puts some requirements on a dedicated ITS. The rotational stabilization of ideal magnetohydrodynamic modes puts some important accent to the plasma rotation measurements. The coherent (or collective) Thomson scattering giving ion temperature can be useful in a prototype fusion reactor to monitor the ignition process. A state-of-the-art review for these diagnostics is carried out trying to outline the perspectives that are seen from the point of view of physics studies. A discussion of the present limits is presented and new directions of development identified, since a step foreward in the physics studies implies a parallel refinement and/or new conception of diagnostic equipment. © 1999 American Institute of Physics.
Original languageEnglish
Pages (from-to)397 - 402
Number of pages6
JournalReview of Scientific Instruments
Volume70
Issue number1 II
Publication statusPublished - Jan 1999
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Instrumentation

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