AXAF grating efficiency measurements with calibrated nonimaging detectors

Daniel Dewey; Jeremy J. Drake; Richard J. Edgar; Kendra Michaud; Peter W. Ratzlaff

doi:10.1117/12.331271

19 November 1998 AXAF grating efficiency measurements with calibrated nonimaging detectors

Daniel Dewey, Jeremy J. Drake, Richard J. Edgar, Kendra Michaud, Peter W. Ratzlaff

Proceedings Volume 3444, X-Ray Optics, Instruments, and Missions; (1998) https://doi.org/10.1117/12.331271
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

In Phase 1 of AXAF testing at the X-Ray Calibration Facility (XRCF), calibrated flow proportional counters (FPCs) and solid-state detectors were used both in the focal plane and as beam-normalization detectors. This use of similar detectors in the beam and focal plane combined with detailed fitting of their pulse-height spectra allowed accurate measurements of the HRMA absolute effective area with minimum influence of source and detector effects. This paper describes the application of these detectors and fitting techniques to the analysis of effective area and efficiency measurements of the AXAF transmission gratings, the High Energy Transmission Grating (HETG) and the Low Energy Transmission Grating. Because of the high dispersion of these gratings the analysis must be refined. Key additional ingredients are the inclusion of detailed x-ray source models of the K and L lines based on companion High-Speed Imager microchannel-plate data and corrections to the data based on high-fidelity ray-trace simulations. The XRCF- measured efficiency values that result from these analyses have systematic errors estimated in the 10-20 percent range. Within these errors the measurements agree with the pre-XRCF laboratory-based efficiency models of the AXAF grating diffraction efficiencies.

Citation Download Citation

Daniel Dewey, Jeremy J. Drake, Richard J. Edgar, Kendra Michaud, and Peter W. Ratzlaff "AXAF grating efficiency measurements with calibrated nonimaging detectors", Proc. SPIE 3444, X-Ray Optics, Instruments, and Missions, (19 November 1998); https://doi.org/10.1117/12.331271

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available