Kinetic stress and intrinsic flow in a toroidal plasma.

نویسندگان

  • W X Ding
  • L Lin
  • D L Brower
  • A F Almagri
  • B E Chapman
  • G Fiksel
  • D J Den Hartog
  • J S Sarff
چکیده

A new mechanism for intrinsic plasma flow has been experimentally identified in a toroidal plasma. For reversed field pinch plasmas with a few percent β (ratio of plasma pressure to magnetic pressure), measurements show that parallel pressure fluctuations correlated with magnetic fluctuations create a kinetic stress that can affect momentum balance and the evolution of intrinsic plasma flow. This implies kinetic effects are important for flow generation and sustainment.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Experimental observations of driven and intrinsic rotation in tokamak plasmas

Experimental observations of driven and intrinsic rotation in tokamak plasmas are reviewed. For momentum sources, there is direct drive from neutral beam injection, lower hybrid and ion cyclotron range of frequencies waves (including mode conversion flow drive), as well as indirect j B × forces from fast ion and electron orbit shifts, and toroidal magnetic field ripple loss. Counteracting rotat...

متن کامل

A simple model of intrinsic rotation in high confinement regime tokamak plasmas

A simple unified model of intrinsic rotation and momentum transport in high confinement regime H-mode tokamak plasmas is presented. Motivated by the common dynamics of the onset of intrinsic rotation and the L-H transition, this simple model combines E B shear-driven residual stress in the pedestal with a turbulent equipartition pinch to yield rotation profiles. The residual stress is the prima...

متن کامل

Magnetohydrodynamically generated velocities in confined plasma

It is shown numerically that both toroidal and poloidal rotational flows are intrinsic to a rigid toroid confining a conducting magnetofluid in which a current is driven by the application of externally-supported electric and magnetic fields. The computation involves no microscopic instabilities or kinetic theory and is purely magnetohydrodynamic (MHD) in nature. The properties and intensity of...

متن کامل

Physics of Non-Diffusive Turbulent Transport of Momentum and the Origins of Spontaneous Rotation in Tokamaks

Recent results in the theory of turbulent momentum transport and the origins of intrinsic rotation are summarized. Special attention is focused on aspects of momentum transport critical to intrinsic rotation, namely the residual stress and the edge toroidal flow velocity pinch. Novel results include a systematic decomposition of the physical processes which drive intrinsic rotation, a calculati...

متن کامل

The Edge Temperature Gradient as Intrinsic Rotation Drive in Alcator C-Mod Tokamak Plasmas

Intrinsic core toroidal rotation has been observed in I-mode plasmas from the Alcator C-Mod tokamak, and is found to be very similar to the rotation in H-mode discharges, both in its edge origin, profile shape and in the scaling with global plasma pressure. Since Iand H-mode plasmas have similar pedestal temperature gradients, but completely different edge density profiles, it may be concluded ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Physical review letters

دوره 110 6  شماره 

صفحات  -

تاریخ انتشار 2013