ATHENA is the L2 mission selected by ESA to pursue the science theme "Hot and Energetic Universe" (launch scheduled in 2028). One of the key instruments of ATHENA is the Wide Field Imager (WFI) which will provide imaging in the 0.1-15 keV band over a 40′×40′ large field of view, together with spectrally and time-resolved photon counting. The WFI camera, based on arrays of DEPFET active pixel sensors, is also sensitive to UV/Vis photons. Optically generated electron-hole pairs may degrade the spectral resolution as well as change the energy scale by introducing a signal offset. For this reason, the use of an X-ray transparent optical blocking filter is needed to allow the observation of all type of X-ray sources that present a UV/Visible bright counterpart. In this paper, we describe the main activities that we are carrying on for the conceptual design of the optical blocking filter, that will be mounted on the filter wheel, in order to satisfy the scientific requirements on optical load from bright UV/Vis astrophysical source, to maximize the X-ray transmission, and to withstand the severe acoustic and vibration loads foreseen during launch.

Barbera, M., Branduardi Raymont, G., Collura, A., Comastri, A., Eder, J., Kamisiński, T., et al. (2015). The optical blocking filter for the ATHENA wide field imager: Ongoing activities towards the conceptual design. In Proceedings of SPIE - The International Society for Optical Engineering. SPIE [10.1117/12.2189326].

The optical blocking filter for the ATHENA wide field imager: Ongoing activities towards the conceptual design

BARBERA, Marco;SCIORTINO, Luisa;
2015-01-01

Abstract

ATHENA is the L2 mission selected by ESA to pursue the science theme "Hot and Energetic Universe" (launch scheduled in 2028). One of the key instruments of ATHENA is the Wide Field Imager (WFI) which will provide imaging in the 0.1-15 keV band over a 40′×40′ large field of view, together with spectrally and time-resolved photon counting. The WFI camera, based on arrays of DEPFET active pixel sensors, is also sensitive to UV/Vis photons. Optically generated electron-hole pairs may degrade the spectral resolution as well as change the energy scale by introducing a signal offset. For this reason, the use of an X-ray transparent optical blocking filter is needed to allow the observation of all type of X-ray sources that present a UV/Visible bright counterpart. In this paper, we describe the main activities that we are carrying on for the conceptual design of the optical blocking filter, that will be mounted on the filter wheel, in order to satisfy the scientific requirements on optical load from bright UV/Vis astrophysical source, to maximize the X-ray transmission, and to withstand the severe acoustic and vibration loads foreseen during launch.
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX
usa
2015
2015
13
A stampa
http://spie.org/x1848.xml
Barbera, M., Branduardi Raymont, G., Collura, A., Comastri, A., Eder, J., Kamisiński, T., et al. (2015). The optical blocking filter for the ATHENA wide field imager: Ongoing activities towards the conceptual design. In Proceedings of SPIE - The International Society for Optical Engineering. SPIE [10.1117/12.2189326].
Proceedings (atti dei congressi)
Barbera, M.; Branduardi Raymont, G.; Collura, A.; Comastri, A.; Eder, J.; Kamisiński, T.; Lo Cicero, U.; Meidinger, N.; Mineo, T.; Molendi, S.; Parodi, G.; Pilch, A.; Piro, L.; Rataj, M.; Rauw, G.; Sciortino, L.; Sciortino, S.; Wawer, P.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/213065
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