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C.A.F. Varandas

Researcher at Instituto Superior Técnico

Publications -  120
Citations -  1504

C.A.F. Varandas is an academic researcher from Instituto Superior Técnico. The author has contributed to research in topics: ISTTOK & Tokamak. The author has an hindex of 21, co-authored 120 publications receiving 1437 citations. Previous affiliations of C.A.F. Varandas include European Atomic Energy Community.

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Radial Structure of Reynolds Stress in the Plasma Boundary of Tokamak Plasmas

TL;DR: In this paper, the radial profile of Reynolds stress has been measured in the plasma boundary region of the ISTTOK tokamak using a multiarray of Langmuir probes, showing a radial gradient close to the velocity shear layer location.
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Overview of the JET results

Francesco Romanelli, +1104 more
- 27 Mar 2015 - 
TL;DR: In this paper, a detailed analysis of the plasma-facing components of the day-one tungsten divertor in ITER-like wall has been carried out, showing that the pattern of deposition within the divertor has changed significantly with respect to the JET carbon wall campaigns due to the absence of thermally activated chemical erosion of beryllium in contrast to carbon.
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Generation of sheared poloidal flows via Reynolds stress and transport barrier physics

TL;DR: In this paper, a view of the latest experimental results and progress in the understanding of the role of poloidal flows driven by Reynolds stress via Reynolds stress is given, and experimental evidence of sheared E×B flows linked to the location of rational surfaces in stellarator plasmas might be interpreted in terms of Reynolds stress sheared driven flows.
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ATCA digital controller hardware for vertical stabilization of plasmas in tokamaks

TL;DR: A new digital control hardware, based on the Advanced Telecommunications Computing Architecture™ (ATCA), is being developed aiming to reduce the VS digital control loop cycle (down to an optimal value of 10μs) and improve the algorithm performance.