Spectral resolution for a five-element, filtered, x-ray detector array using the method of Backus and Gilbert
- Sandia National Laboratories, Albuquerque, New Mexico 87185-1196 (United States)
The generalized method of Backus and Gilbert (BG) is described and applied to the inverse problem of obtaining the spectrum from a five-channel, filtered array of x-ray detectors. This diagnostic is routinely fielded on the Z facility at Sandia National Laboratories to study soft x-ray photons ({approx}100-2300 eV), emitted by high density Z-pinch plasmas. The BG method defines spectral resolution limits on the system of response functions that are in good agreement with a classical unfold method, based on a histogram representation of the source spectrum. The resolution so defined is independent of the source spectrum. For noise-free, simulated data the BG approximating function is also in reasonable agreement with the source spectrum (150 eV blackbody) and the unfolded spectrum. This function may be used as an initial trial function for iterative methods or a regularization model.(c) 2000 American Institute of Physics. (c)
- OSTI ID:
- 20217303
- Journal Information:
- Review of Scientific Instruments, Vol. 71, Issue 8; Other Information: PBD: Aug 2000; ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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