Initial operation of a newly developed multichord motional Stark effect diagnostic in KSTAR

J. Chung, J. Ko, H. Wi, M.C.C. Messmer, S. Schenkelaars, M. Scheffer, R.J.E. Jaspers

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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A photo-elastic modulator based 25-chord motional Stark effect (MSE) diagnostic has been successfully developed and commissioned in Korea Superconducting Tokamak Advanced Research. The diagnostic measures the radial magnetic pitch angle profile of the Stark splitting of a D-alpha line at 656.1 nm by the electric field associated with the neutral deuterium heating beam. A tangential view of the neutral beam provides a good spatial resolution of 1–3 cm for covering the major radius from 1.74 m to 2.28 m, and the time resolution is achieved at 10 ms. An in-vessel calibration before the vacuum closing as well as an in situ calibration during the tokamak operation was performed by means of specially designed polarized lighting sources. In this work, we present the final design of the installed MSE diagnostic and the first results of the commissioning.
Originele taal-2Engels
Pagina's (van-tot)1-4
TijdschriftReview of Scientific Instruments
Nummer van het tijdschrift11
StatusGepubliceerd - nov 2016

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