Conference Papers

Showing 1 - 3 of 3 Conference Paper Results
2018
UKAEA-CCFE-CP(20)98
"Optimization of JET-DT and ITER operation by developing an understanding of the role of low-Z impurity on the H-mode pedestal"
27th IAEA Fusion Energy Conference, Ahmedabad, India, 22-27 October 2018

C. Giroud N. Aiba F. Militello C. Challis A. Chankin B. Lomanowski D. Hatch J. Harrison D. Frigione D. Moulton S. Pamela F. Parra J. Parisi I. Putzai D. Refy S. Saarelma C. Stavrou B. Tal E. Belonohy S. Brezinsek S. Buller C. Bowman E. Delabie A. Field J. Fontdecaba A. Huber A. Meigs S. Menmuir J. Simpson JET Contributors

Preprint Published
2019
UKAEA-CCFE-CP(19)55
"Modelling the effects of misaligning the probe beam and magnetic field in Doppler backscattering measurements"
14th International Reflectometry Workshop, Swiss Plasma Center of the Ecole Polytechnique Fédérale de Lausanne, Switzerland, 22-24 May 2019

V.H. Hall-Chen F.I. Parra J.C. Hillesheim

The use of Doppler Backscattering (DBS) in spherical tokamaks is challenging since the magnetic pitch angle can be large (up to 35, compared to 15 in standard tokamaks like JET). Moreover the pitch angle varies both spatially and temporally. Hence, the probe beam is generally not perpendicular to the magnetic field. This misalignment, which affec…

Preprint Published
2019
UKAEA-CCFE-CP(19)18
"Effects of misaligning the probe beam and magnetic field in Doppler backscattering measurements"
45th European Physical Society Conference on Plasma Physics (EPS), Prague, 2-6 July 2018

V.H. Chen F.I. Parra J.C. Hillesheim

The Doppler Backscattering (DBS) microwave diagnostic enables the non-perturbative characterisation of density fluctuations and flows, both at the edge and the core of the plasma. The large magnetic pitch angle (up to 35 degrees, compared to 15 degrees in standard tokamaks like JET) and the time-varying magnetic equilibrium make the use of DBS in s…

Preprint Published