المستخلص: |
In this review the Fourier reconstruction algorithm is used to view plasmas in spatial domain as the sum of each line integral times a weighting function (to be chosen) of the distance from the line view to the point of reconstruction. We have shown that the most useful filters in plasma image reconstruction are special cases of those general class filters proposed by Kwoh and Reed. Due to the symmetry of the plasma cross section, and the value of the scanning angle, the general Fourier formula can be reduced to one dimensional integral, depending on whether the plasma cross section is circular, elliptical or hyperbolic. The opaque tokamak plasma cross section can be scanned by means of a single detector array. The detector can than be rotated to form a set of n number of views, each view being inclined at a certain angle 0 and consists of m number of line projections.
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