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Abstract

Determining d{2}I/dV{2} from a traditional Langmuir probe trace using numerical techniques is inherently noisy and generally yields poor results. We have developed a Langmuir probe system based on a method first used in the 1950s by Boyd and Twiddy (1959 Proc. R. Soc. A 53 250). The system measures the 2nd derivative directly. This paper presents an account of the experimental method, apparatus and software used along with some preliminary results from the KAMABOKO III source including a comparison with conventional probe methods.

Additional information

Authors: CROWLEY B, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);HOMFRAY D, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);COX S J, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);BOILSON D, Association Euratom/DCU, Dublin City University, Dublin (IE);DE ESCH H P L, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);HEMSWORTH R S, 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: Nuclear Fusion 46 (2006), pp. S307-S312
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/10.1088/0029-5515/46/6/S11
Record Number: 200719115 / Last updated on: 2007-04-11
Category: PUBLICATION
Original language: en
Available languages: en