Identification of electrostatic microinstability maps in quasi-axisymmetric stellarator

New Classes of Quasi-Axisymmetric Stellarator Configurations

We have identified and developed new classes of quasi-axially symmetric configurations which have attractive properties from the standpoint of both near-term physics experiments and long-term power producing reactors. These new configurations were developed as a result of surveying the aspect ratio-rotational transform space to identify regions endowed with particularly interesting features. Th...

Quasi Periodic Oscillations Due to Axisymmetric and Non-axisymmetric Shock Oscillations in Black Hole Accretion

SANDIP K. CHAKRABARTI, D. DEBNATH, P.S. PAL, A. NANDI, R. SARKAR, M.M. SAMANTA, P.J. WIITA, H. GHOSH and D. SOM S. N. Bose National Centre for Basic Sciences, JD-Block, Sector III, Salt Lake, Kolkata, 700 098, India. E-mail:[email protected] 2 Centre for Space Physics, Chalantika 43, Garia Station Rd., Kolkata 700084, India. 3 Department of Physics & Astronomy, Georgia State University, PO B...

Energetic particle transport in compact quasi-axisymmetric stellarators

On the appearance of carboxylates in electrostatic potential maps.

Electron microscopy can provide accurate, high-resolution images of the distribution of electrostatic potential (ESP) in biological macromolecules. Careful examination of ESP maps that have been published for peptides and proteins at resolution ranging from 1.0 Å to 2.9 Å reveals that the negative charges of carboxylate groups have a profound effect on their appearance. It is clear that investi...

Quasi Markovian behavior in mixing maps

We consider the time dependent probability distribution of a coarse grained observable Y whose evolution is governed by a discrete time map. If the map is mixing, the time dependent one-step transition probabilities converge in the long time limit to yield an ergodic stochastic matrix. The stationary distribution of this matrix is identical to the asymptotic distribution of Y under the exact dy...