Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992veta.nasaq....z&link_type=abstract
In its VETA-I X Ray Test Analysis 14 p (SEE N93-26183 09-74)
Astronomy and Astrophysics
Astrophysics
Imaging Techniques, Microchannel Plates, Pinhole Cameras, Size Distribution, Spatial Resolution, X Ray Astrophysics Facility, X Ray Sources, Angular Resolution, Anodes, Electron Impact, Magnification, Mirrors, Pinholes
Scientific paper
The X-ray generator for the AXAF VETA-I mirror test is an electron impact X-ray source with various anode materials. The source sizes of different anodes and their intensity distributions were measured with a pinhole camera before the VETA-I test. The pinhole camera consists of a 30 micrometers diameter pinhole for imaging the source and a Microchannel Plate Imaging Detector with 25 micrometers FWHM spatial resolution for detecting and recording the image. The camera has a magnification factor of 8.79, which enables measuring the detailed spatial structure of the source. The spot size, the intensity distribution, and the flux level of each source were measured with different operating parameters. During the VETA-I test, microscope pictures were taken for each used anode immediately after it was brought out of the source chamber. The source sizes and the intensity distribution structures are clearly shown in the pictures. They are compared and agree with the results from the pinhole camera measurements. This paper presents the results of the above measurements. The results show that under operating conditions characteristic of the VETA-I test, all the source sizes have a FWHM of less than 0.45 mm. For a source of this size at 528 meters away, the angular size to VETA is less than 0.17 arcsec which is small compared to the on ground VETA angular resolution (0.5 arcsec, required and 0.22 arcsec, measured). Even so, the results show the intensity distributions of the sources have complicated structures. These results were crucial for the VETA data analysis and for obtaining the on ground and predicted in orbit VETA Point Response Function.
Fulton Melinda A.
Kellogg Edwin M.
Schwartz Daniel A.
Shao Yibo
Zhao Ping
No associations
LandOfFree
Intensity distribution of the x ray source for the AXAF VETA-I mirror test 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 Intensity distribution of the x ray source for the AXAF VETA-I mirror test, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intensity distribution of the x ray source for the AXAF VETA-I mirror test will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1346510