Neutron-induced backgound in proportional counters for x-ray astronomy

Massimo Rapisarda, Enrico Costa, Marco Feroci, Stefano Giagu

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

The influence of the secondary neutrons and photons, produced by cosmic ray interactions with the spacecraft, on the background of X-ray proportional counters used for astronomical observations from satellite, is investigated by means of two Monte Carlo codes. The GEANT3 code has been used to simulate the production and transport of particles and gamma rays in a structure that reproduces the masses and the materials of the satellite Spectrum-X-Gamma, to a relatively high degree of accuracy. Then, the MCNP code has been used to simulate the behavior of the multiwire proportional counters of SXRP, described in detail in a 3-D geometry, exposed to the neutron and gamma flux resulting from the interactions of the primary cosmic protons with the satellite. Preliminary results indicate that the photons produced as secondary particles in the structures of the satellite overwhelm by an order of magnitude those of the diffuse celestial background directly transmitted through the same structures, and that the estimated counting rate induced by the secondary neutrons and photons is comparable with that observed in similar space missions.
Original languageEnglish
Publication statusPublished - 1992
Externally publishedYes
EventEUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III - , Unknown
Duration: 1 Jan 1992 → …

Conference

ConferenceEUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III
CountryUnknown
Period1/1/92 → …

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Rapisarda, M., Costa, E., Feroci, M., & Giagu, S. (1992). Neutron-induced backgound in proportional counters for x-ray astronomy. Paper presented at EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III, Unknown.