Stabilization of the resistive wall mode using a fake rotating shell
- Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712 (United States)
- General Atomics, La Jolla, California 92186 (United States)
Tokamak plasma performance can, in theory, be greatly improved if the so-called {open_quote}{open_quote}resistive wall mode{close_quote}{close_quote} is stabilized. This can be achieved by spinning the plasma rapidly, but such a scheme would be difficult to implement in a reactor setting. A more promising approach is to apply external feedback in order to make a resistive shell placed around the plasma act like a perfect conductor. A scheme is outlined by which a network of feedback controlled conductors surrounding the plasma can be made to act like a {ital rotating} shell. This fake rotating shell combined with a stationary conventional shell (e.g., the vacuum vessel) can completely stabilize the resistive wall mode. The gain, bandwidth, current, and power requirements of the feedback amplifiers are extremely modest. A previously proposed stabilization scheme (the intelligent shell) is also investigated, and is compared with the fake rotating shell concept. The main disadvantage of the former scheme is that it requires a high gain. {copyright} {ital 1996 American Institute of Physics.}
- Research Organization:
- General Atomics, San Diego, CA (United States)
- DOE Contract Number:
- AC03-89ER51114; FG05-80ET53088
- OSTI ID:
- 285582
- Journal Information:
- Physics of Plasmas, Vol. 3, Issue 7; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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