Coherence imaging of scrape-off-layer and divertor impurity flows in the Mega Amp Spherical Tokamak (invited)
Silburn, S.A.; Harrison, J.R.; Howard, J.; Gibson, K.J.; Meyer, H.; Michael, C.A.; Sharples, R.M.
Professor Ray Sharples firstname.lastname@example.org
A new coherence imaging Doppler spectroscopy diagnostic has been deployed on the UK’s Mega Amp Spherical Tokamak for scrape-off-layer and divertor impurity flow measurements. The system has successfully obtained 2D images of C III, C II, and He II line-of-sight flows, in both the lower divertor and main scrape-off-layer. Flow imaging has been obtained at frame rates up to 1 kHz, with flow resolution of around 1 km/s and spatial resolution better than 1 cm, over a 40° field of view. C III data have been tomographically inverted to obtain poloidal profiles of the parallel impurity flow in the divertor under various conditions. In this paper we present the details of the instrument design, operation, calibration, and data analysis as well as a selection of flow imaging results which demonstrate the diagnostic's capabilities.
Silburn, S., Harrison, J., Howard, J., Gibson, K., Meyer, H., Michael, C., & Sharples, R. (2014). Coherence imaging of scrape-off-layer and divertor impurity flows in the Mega Amp Spherical Tokamak (invited). Review of Scientific Instruments, 85(11), Article 11D703. https://doi.org/10.1063/1.4891165
|Journal Article Type||Article|
|Acceptance Date||Jul 1, 2014|
|Online Publication Date||Aug 1, 2014|
|Publication Date||Nov 1, 2014|
|Deposit Date||Aug 4, 2014|
|Publicly Available Date||Aug 5, 2014|
|Journal||Review of Scientific Instruments|
|Publisher||American Institute of Physics|
|Peer Reviewed||Peer Reviewed|
Published Journal Article
© 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Silburn, S. A., Harrison, J. R., Howard, J., Gibson, K. J., Meyer, H., Michael, C. A. and Sharples, R. M. (2014) 'Coherence imaging of scrape-off-layer and divertor impurity flows in the Mega Amp Spherical Tokamak (invited).', Review of scientific instruments., 85 (11). 11D703 and may be found at http://dx.doi.org/10.1063/1.4891165.
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