Design studies for X-ray and gamma-ray rotation modulation collimators

Details Design studies for X-ray and gamma-ray rotation modulation collimators Design studies for X-ray and gamma-ray rotation modulation collimators

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1159...27k&link_type=abstract

IN: EUV, X-ray, and gamma-ray instrumentation for astronomy and atomic physics; Proceedings of the Meeting, San Diego, CA, Aug.

Physics

Atomic Physics

1

Collimators, Image Reconstruction, Signal To Noise Ratios, Synthetic Apertures, Artifacts, Modulated Continuous Radiation, Monte Carlo Method, Spatial Resolution, X Ray Imagery

Scientific paper

Several imaging spectrometers, involving three distinct rotation modulation collimator designs, have been simulated on a computer. Data produced by the Monte Carlo technique were used to reconstruct images using the method of rotational aperture synthesis. The statistical behavior of simple and complex images was studied including the noise produced by the reconstruction method and by the detector background. Aberrations or artifacts were produced by the following: variations of detector efficiency, misalignment of the instrument and rotation axes, time varying backgrounds, parallax (as encountered in laboratory testing), and using only one detector of each frequency pair. Methods were devised to eliminate each of these aberrations or artifacts; most of these methods are exact and do not increase the background noise. To determine the optimum number of detectors to use for a given total area, the reconstructed image of a single point was studied as a function of resolution. If, for a constant flux, one expands the image field proportional to the number of detectors used, the peak height, peak width, sidelobe structure, and background characteristics remain unchanged within statistics. Thus, this method imposes no constraint on resolution; rather, geometry and instrument complexity determine the practical limit.

Affiliated with

Also associated with

No associations

Rating

Design studies for X-ray and gamma-ray rotation modulation collimators 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 Design studies for X-ray and gamma-ray rotation modulation collimators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Design studies for X-ray and gamma-ray rotation modulation collimators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1618615