Effects of Small Oscillations on the Effective Area

Journal Article · Mon May 11 00:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3149474· OSTI ID:21308676

Cotroneo, V ^[1]; Conconi, P; Pareschi, G; Spiga, D; Tagliaferri, G ^[1]; Cusumano, G ^[2]

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1. Brera Astronomical Observatory/INAF (Italy)
2. IASF-Pa Palermo (Italy)

We analyze the effective area of the Simbol-X mirrors as a function of the off-axis angle for small oscillations. A reduction is expected due to: 1) geometrical effects, because some of the photons miss the secondary mirror surface; 2) reflectivity effects, caused by the variation of the coating reflectivity with the incidence angle. The former are related to the length of the two mirror surfaces, and can be reduced by making the secondary mirror longer. The second ones are energy-dependent, and strongly related to the characteristics of the reflecting coating. These effects are analyzed by means of ray-tracing simulations in order to optimize the mirror and coating design, aiming to improve the effective area stability.

• OSTI ID: 21308676
• Journal Information: AIP Conference Proceedings, Vol. 1126, Issue 1; Conference: 2. international Simbol-X symposium, Paris (France), 2-5 Dec 2008; Other Information: DOI: 10.1063/1.3149474; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ANTIREFLECTION COATINGS
COSMIC X-RAY SOURCES
DESIGN
ENERGY DEPENDENCE
INCIDENCE ANGLE
MIRRORS
OSCILLATIONS
PHOTONS
REFLECTIVITY
SATELLITES
SOLID SCINTILLATION DETECTORS
TELESCOPE COUNTERS
VARIATIONS
X-RAY DETECTION