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Progress Towards Improved Analysis of TES X-ray Data Using Principal Component AnalysisThe traditional method of applying a digital optimal filter to measure X-ray pulses from transition-edge sensor (TES) devices does not achieve the best energy resolution when the signals have a highly non-linear response to energy, or the noise is non-stationary during the pulse. We present an implementation of a method to analyze X-ray data from TESs, which is based upon principal component analysis (PCA). Our method separates the X-ray signal pulse into orthogonal components that have the largest variance. We typically recover pulse height, arrival time, differences in pulse shape, and the variation of pulse height with detector temperature. These components can then be combined to form a representation of pulse energy. An added value of this method is that by reporting information on more descriptive parameters (as opposed to a single number representing energy), we generate a much more complete picture of the pulse received. Here we report on progress in developing this technique for future implementation on X-ray telescopes. We used an 55Fe source to characterize Mo/Au TESs. On the same dataset, the PCA method recovers a spectral resolution that is better by a factor of two than achievable with digital optimal filters.
Document ID
20170002315
Document Type
Reprint (Version printed in journal)
Authors
Busch, S. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Adams, J. S. (Maryland Univ. Greenbelt, MD, United States)
Bandler, S. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Chervenak, J. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Eckart, M. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Finkbeiner, F. M. (Wyle Information Systems Greenbelt, MD, United States)
Fixsen, D. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kelley, R. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kilbourne, C. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lee, S.-J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Moseley, S. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Porst, J.-P. (Brown Univ. Providence, RI, United States)
Porter, F. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sadleir, J. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
March 17, 2017
Publication Date
November 6, 2015
Publication Information
Publication: Journal of Low Temperature Physics
Volume: 184
Issue: 1
ISSN: 0022-2291
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN40064
Funding Number(s)
CONTRACT_GRANT: NNG06EO90A
CONTRACT_GRANT: NNG12PL17C
CONTRACT_GRANT: NNH06CC03B
Distribution Limits
Public
Copyright
Other
Keywords
Low-temperature detectors A[center dot] Transition-edge sensors (TES) A[center d