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Investigation of rotation at the plasma edge in TCABR
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2015 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 55, no 9, 093001Article in journal (Refereed) Published
Abstract [en]

This paper summarizes experimental results from recent studies on intrinsic rotation at the plasma edge of the TCABR tokamak. These results were obtained after upgrading the number of channels of the rotation diagnostic to three. The measurements were carried out in the collisional (Pfirsch-Schluter) regime and the rotation profiles of the ions were obtained from the Doppler shifts of the impurity carbon lines, CIII (464.74 nm), and CVI (529.06 nm). Results on the correlation between toroidal rotation at the plasma edge and direction of gas injection are also presented. They indicate that the direction of gas injection has a small effect on rotation; the velocity of the background neutral hydrogen is affected by direct momentum transfer from the injected gas (also hydrogen), while the carbon ions' velocity is affected by inward radial friction force between the injected gas atoms and ions, increasing their velocity in the opposite sense of the plasma current.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2015. Vol. 55, no 9, 093001
Keyword [en]
plasma rotation, diagnostic, spectroscopy
National Category
Fusion, Plasma and Space Physics
URN: urn:nbn:se:kth:diva-177423DOI: 10.1088/0029-5515/55/9/093001ISI: 000363761400004ScopusID: 2-s2.0-84941591645OAI: diva2:873587

QC 20151124

Available from: 2015-11-24 Created: 2015-11-20 Last updated: 2015-11-24Bibliographically approved

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Tendler, Mikael
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