17 citations · 20 across the 16 of their papers we have counts for
8 papers · 1 filter
Divergence Without Transition in Adiabatic Theory: Exact Cancellation in Reflectionless Potentials
Amitava Bhattacharjee
Adiabatic invariants play a central role in plasma physics, from magnetic moment and bounce action to wave action in slowly varying media. Their perturbative constructions are ofte…
Optical analogy for stellarators: Ridges as caustics and coils as singularities
Wrick Sengupta, Stefan Buller, Rogerio Jorge +7
A common feature of most numerically optimized stellarator geometries is the presence of sharp ridges on outer flux surfaces, irrespective of the rotational transform. Despite thei…
Anderson Localization of Ion-Temperature-Gradient Modes and Ion Temperature Clamping in Aperiodic Stellarators
Amitava Bhattacharjee
Ion temperature clamping -- the saturation of the ion temperature regardless of heating power -- is observed across stellarator experiments. We propose a minimal model based on And…
System Size Dependence of Collisionless Reconnection Rate
Yi-Min Huang, Naoki Bessho, Li-Jen Chen +2
It is a widely accepted paradigm that collisionless magnetic reconnection proceeds at a universal fast rate of when normalized to a properly defined reconnecting magnetic…
Forced Reconnection in Voigt-Regularized MHD
Andrew Brown, Yi-Min Huang, Amitava Bhattacharjee
Forced reconnection in Voigt-regularized MHD is investigated in the Hahm-Kulsrud-Taylor problem. It is shown that Voigt regularization introduces an early linear phase of reconnect…
Topological Arrest of Ballooning Modes in Non-Axisymmetric Plasmas
Amitava Bhattacharjee
Why do non-axisymmetric stellarators avoid ballooning crashes that afflict tokamaks? Three-dimensional geometry induces Anderson localization of ballooning modes, converting a glob…