The vertical position of elongated tokamak plasmas is unstable on
the time scale of the eddy currents in the axisymmetric conducting
structures. In the absence of feedback control, the plasma would
drift vertically and quench on the wall, a situation known as
Vertical Displacement Event (VDE), with serious consequences for
machine integrity. As tokamaks approach reactor regimes, VDE's
cannot be tolerated: vertical feedback control must be robust
against system uncertainty and the occurrence of noise and
disturbances. At the same time, adaptive routines should be in
place to handle unexpected events. The problem of robust control of
the vertical position can be formulated in terms of identifying
which variables affect vertical stability and which ones are not
directly controlled/controllable; identifying the physical region
of these variables, and the corresponding most unstable equilibria;
and designing the control system to stabilize all equilibria with
sufficient margin. The margin should be enough to allow the system
to tolerate realistic scenarios of noise and disturbances.
General
| Imprint: |
Lap Lambert Academic Publishing
|
| Country of origin: |
United States |
| Release date: |
April 2014 |
| First published: |
April 2014 |
| Authors: |
Ferrara Marco
|
| Dimensions: |
229 x 152 x 9mm (L x W x T) |
| Format: |
Paperback - Trade
|
| Pages: |
160 |
| ISBN-13: |
978-3-659-53280-1 |
| Categories: |
Books >
Science & Mathematics >
Physics >
Nuclear structure physics
|
| LSN: |
3-659-53280-0 |
| Barcode: |
9783659532801 |
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