Optimization of the Configuration of Pixilated Detectors Based on the Shannon-Nyquist Theory for the X-Ray Spectroscopy of Hot Tokamak Plasmas
Authors: E. Wang, P. Beiersdorfer, M. Bitter, L.F. Delgado-Aprico, K.W. Hill and N. Pablant
Abstract:
This paper describes an optimization of the detector configuration, based on the Shannon-Nyquist theory, for two major
x-ray diagnostic systems on tokamaks and stellarators: x-ray imaging crystal spectrometers and x-ray pinhole cameras.
Typically, the spectral data recorded with pixilated detectors are oversampled, meaning that the same spectral information
could be obtained using fewer pixels. Using experimental data from Alcator C-Mod, we quantify the degree of oversampling
and propose alternate uses for the redundant pixels for additional diagnostic applications.
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Submitted to: 19th Topical Conference on High Temperature Plassma Diagnostics, Monterey, California (May 6-10, 2012)
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Download PPPL-4765 (pdf 1.25 MB 3 pp)
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