Modeling the diffraction efficiencies of the AXAF high-energy transmission gratings: II

Details Modeling the diffraction efficiencies of the AXAF high-energy transmission gratings: II Modeling the diffraction efficiencies of the AXAF high-energy transmission gratings: II

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2808..650f&link_type=abstract

Proc. SPIE Vol. 2808, p. 650-676, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VII, Oswald H. Siegmund; Mark A. Gummi

Astronomy and Astrophysics

Astronomy

1

Scientific paper

In order to characterize the instrumentation on AXAF, each of the science instrument teams carries out sub-assembly calibrations. For the high energy transmission grating (HETG) group, this means individual measurements of the diffraction efficiencies of each of the 336 grating elements that goes into the completed HETG assembly. Measurements are made at a number of energies (corresponding to x-ray emission lines) which fix the parameters of a model. This model is determined from first principles and verified by extensively testing sample grating elements at synchrotron radiation facilities. Here we present new synchrotron radiation (SR) data obtained at the national Synchrotron Light Source (NSLS) and at the radiometry laboratory of the Physikalisch-Technische Bundesanstalt (PTB) using the electron storage ring BESSY in Berlin. The gratings are from AXAF flight lots, and we apply an improved data reduction technique which builds on our experience from last year (Markert et al., SPIE Proceedings 2518, 424, 1995). Our analysis takes into account the effects of small extended wings in the diffraction of the various orders in the NSLS data. Our goal is to obtain efficiencies in the 0th and plus/minus 1st diffraction orders which are accurate in the 1% level, except near absorption edges, where accuracies in the 5% to 10% level are required. With a few exceptions (discussed here) our new data/improved model meets these goals.

Affiliated with

Also associated with

No associations

Rating

Modeling the diffraction efficiencies of the AXAF high-energy transmission gratings: II does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Modeling the diffraction efficiencies of the AXAF high-energy transmission gratings: II, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling the diffraction efficiencies of the AXAF high-energy transmission gratings: II will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1142460