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Tomographic wire-grid imaging of magnetic surfaces : Proceedings of the 9th topical conference on high temperature plasma diagnostics (1992)

Blackwell, B. D. ; Howard, J. ; Tumlos, R. B.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 63 (1992), S. 4725-4727

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ISSN: 1089-7623

Source: AIP Digital Archive

Topics: Physics , Electrical Engineering, Measurement and Control Technology

Notes: We describe a new, fast, and accurate method for obtaining magnetic surface puncture plots by the use of a rotating grid of fine wires. Electrons launched from a small gun follow the magnetic field lines, and a fraction are intercepted by the wire grid. The current signals, chordal integrals of electron beam intensity, are inverted by an iterative pseudotomographic method to obtain an image of the electron beam density in the plane of the grid, that is, a puncture plot of the magnetic surface. The method is capable of high resolution while maintaining a high transparency to electrons, and is demonstrated on a small toroidal stellarator, the SHEILA heliac.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1143620

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