کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1827173 | 1526469 | 2010 | 4 صفحه PDF | دانلود رایگان |

Various methods exist to filter cosmic rays from X-ray CCD images with weak X-ray spectra. Distortions of the characteristics of a spectral profile such as peak centroid and relative integrated peak intensities must be kept to a minimum. Optimum methods are those minimising error bars and widths on the final centroid determination and on relative intensities which remain consistent with the widths for unfiltered data. A cluster method, a linear correlation method and a combination of both were examined using H-like Ti collected at the NIST EBIT. The cluster method is a strong filter but appears to distort centroids and relative intensities. The linear correlation method filters less and distorts less. The strongest filtering is to use both yielding the highest signal-to-noise while enhancing apparent distortions. All methods appear fairly robust. Strong cosmic-ray filters with minimal distortion of X-ray spectra can increase the precision of X-ray CCD measurements and enhance the resulting physical insight.
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 619, Issues 1–3, 1–21 July 2010, Pages 150–153