UKAEA Journals

Showing 1 - 3 of 3 Journals Results
2015
CCFE-PR(15)72
"Observations of 2D backscattering on MAST"

D. A. Thomas K. J. Brunner S. J. Freethy B. K. Huang V. F. Shevchenko R. G. L. Vann

The Synthetic Aperture Microwave Imaging (SAMI) diagnostic has conducted proof-of-principle 2D Doppler backscattering (DBS) experiments on MAST. SAMI actively probes the plasma edge using a wide ( 40° vertical and horizontal) and tuneable (10-35.5 GHz) beam. The Doppler backscattered signal is digitised in vector form using an array of eight Vival…

Preprint Published
2015
CCFE-PR(15)88
"Linear multispecies gyrokinetic flux tube benchmarks in shaped tokamak plasmas"

G. Merlo O. Sauter S. Brunner A. Burckel Y. Camenen F. Casson W.Dorland E. Fable T. Görler F. Jenko D. Told A. Peeters L. Villard

Verification is the fundamental step that any turbulence simulation code has to be submitted in order to assess the proper implementation of the underlying equations. We have carried out a cross comparison of three flux tube gyrokinetic codes, GENE [F. Jenko et al., Phys. Plasmas 7, 1904 (2000)], GKW [A. G. Peeters et al., Comput. Phys. Commun. 180…

Preprint Published
2014
"Design of a real-time two-color interferometer for MAST Upgrade"

T. O’Gorman G. Naylor R. Scannell G. Cunningham K. J. Brunner R. Martin D. Croft

A single chord two-color CO2/HeNe (10.6/0.633 µm) heterodyne laser interferometer has been designed to measure the line integral electron density along the mid-plane of the MAST Upgrade tokamak, with a typical error of 1 × 1018 m-3 (~2 phase error) at 4 MHz temporal resolution. To ensure this diagnostic system can be restored from any failures wi…

Published