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Proceedings Paper

Ground calibration of the Silicon Drift Detectors for NICER
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Paper Abstract

The Neutron star Interior Composition ExploreR (NICER) is set to be deployed on the International Space Station (ISS) in early 2017. It will use an array of 56 Silicon Drift Detectors (SDDs) to detect soft X-rays (0.2 - 12 keV) with 100 nanosecond timing resolution. Here we describe the effort to calibrate the detectors in the lab primarily using a Modulated X-ray Source (MXS).

The MXS that was customized for NICER provides more than a dozen emission lines spread over the instrument bandwidth, providing calibration measurements for detector gain and spectral resolution. In addition, the fluorescence source in the MXS was pulsed at high frequency to enable measurement of the delay due to charge collection in the silicon and signal processing in the detector electronics. A second chamber, designed to illuminate detectors with either 55Fe, an optical LED, or neither, provided additional calibration of detector response, optical blocking, and effectiveness of background rejection techniques. The overall ground calibration achieved total operating time that was generally in the range of 500-1500 hours for each of the 56 detectors.

Paper Details

Date Published: 19 July 2016
PDF: 7 pages
Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99054W (19 July 2016); doi: 10.1117/12.2232784
Show Author Affiliations
Beverly LaMarr, MIT Kavli Institute for Astrophysics (United States)
Gregory Prigozhin, MIT Kavli Institute for Astrophysics (United States)
Ronald Remillard, MIT Kavli Institute for Astrophysics (United States)
Andrew Malonis, MIT Kavli Institute for Astrophysics (United States)
Keith C. Gendreau, NASA Goddard Space Flight Ctr. (United States)
Zaven Arzoumanian, NASA Goddard Space Flight Ctr. (United States)
Craig B. Markwardt, NASA Goddard Space Flight Ctr. (United States)
Wayne H. Baumgartner, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 9905:
Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Tadayuki Takahashi; Marshall Bautz, Editor(s)

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