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Abstract

The ion temperature is a particularly important but rarely measured plasma boundary quantity. In this work we introduce a new electric probe, the segmented tunnel probe (STP), which measures ion temperature, electron temperature, and parallel ion current density simultaneously and with high temporal resolution. The probe was built and tested in the CASTOR tokamak. The STP was operated in a Mach-probe arrangement in a DC mode, providing bi-directional measurements with the temporal resolution of 1 mu s. Therefore, it has significant potential to be employed in the research of transient phenomena in tokamaks (e.g. turbulence, fluctuations and ELMs). We present radial profiles of the plasma parameters in the CASTOR tokamak measured by the STP, using calibrations from particle-in-cell simulations.

Additional information

Authors: KOCAN M, Department of Experimental Physics, Comenius University, Bratislava (SK);PÁNEK R, Institute of Plasma Physics, Association EURATOM-IPP.CR, Prague (CZ);STÖCKEL J, Institute of Plasma Physics, Association EURATOM-IPP.CR, Prague (CZ);HRON M, Institute of Plasma Physics, Association EURATOM-IPP.CR, Prague (CZ);DEJARNAC R, Institute of Plasma Physics, Association EURATOM-IPP.CR, Prague (CZ);GUNN J P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Journal of Nuclear Materials (2007), online edition
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://www.sciencedirect.com/science/journal/00223115
Record Number: 200718977 / Last updated on: 2007-03-26
Category: PUBLICATION
Original language: en
Available languages: en