M. Goniche J. Mailloux Y. Baranov T. M. Biewer I. Coffey et al.
During high power commissioning of the JET LH launcher, the radiation and impurity release has been analyzed from various diagnostics: VUV and visible spectroscopy, bolometry. These two last diagnostics have lines-of-sight viewing the launcher and can provide information about the electron and/or impurity source localisation. Using a database of 80…
PublishedR.O. Dendy
Information theory, applied directly to measured signals, yields new perspectives on, and quantitative knowledge of, the physics of strongly nonlinear and turbulent phenomena in plasmas. It represents a new and productive element of the topical research programmes that use modem techniques to characterise strongly nonlinear signals from plasmas, an…
PublishedR. J. La Haye R. J. Buttery
It is found that flow shear has a stabilizing effect on m / n =3/2 neoclassical tearing mode islands through a more negative classical tearing stability index in the DIII-D J. L. Luxon, Nucl. Fusion 42 , 614 2002 tokamak. The heating neutral beams are mixed between co- and counter-directions to vary the torque on the plasma and thus the plasma flow…
PublishedC. Sozzi G. Grossetti Y. Baranov E. De La Luna D. Farina et al.
The new Oblique ECE diagnostics of JET allows simultaneous measurement along three lines of sight at different toroidal angles. JET pulses, in which modulated LHCD power was applied, were analyzed by means of the SPECE emission code, which takes into account the fast electron tail generated by LH. The code results were compared to the ECE spectra f…
PublishedD.J. Ward
Conceptions of the aims and characteristics of DEMOs are evolving in response to world issues. Many areas are important in these considerations: two particularly important, and technically related, ones are examined here. Firstly, in the recent Strategic Energy Technology plan (SET plan) in the EU, approaches to technological development that could…
PublishedV. Shevchenko A. Saveliev
Electron Bernstein waves (EBW) have the potential to provide highly localized heating and current drive (CD). EBWs are predominantly electrostatic and they damp on electrons near electron cyclotron harmonics without momentum injection into the plasma. These features represent a powerful tool for understanding transport and stability phenomena by lo…
PublishedE.S. Marmar A. Bader M. Bakhtiari H. Barnard W. Beck I. Bespamyatnov A. Binus P. Bonoli B. Bose M. Bitter I. Cziegler G. Dekow et al.
This paper summarizes highlights of research results from the Alcator C-Mod tokamak covering the period 2006 through 2008. Active flow drive, using mode converted waves in the ion cyclotron range of frequencies (ICRF), has been observed for the first time in a tokamak plasma, using a mix of D and 3 He ion species; toroidal and poloidal flows are dr…
PublishedSteven P. Fitzgerald
Prismatic dislocation loops are the primary manifestation of radiation damage in crystals, and contribute to the phenomenon of radiation embrittlement. This undesirable effect, most serious for materials used in high-dose environments such as next-generation fission and future fusion reactors, results from the strong interaction between gliding dis…
Published