Design optimization and trade-off study of WFXT optics

被引：0

作者：

Conconi, Paolo ^{[1
]}

Pareschi, Giovanni ^{[1
]}

Campana, Sergio ^{[1
]}

Citterio, Oberto ^{[1
]}

Civitani, Marta ^{[1
]}

Cotroneo, Vincenzo ^{[1
]}

Proserpio, Laura ^{[1
]}

Tagliaferri, Gianpiero ^{[1
]}

Parodi, Giancarlo ^{[2
]}

机构：

[1] INAF Osservatorio Astron Brera, Via Bianchi 46, I-23807 Merate, LC, Italy

[2] BCV Progetti, I-20123 Milan, Italy

来源：

OPTICS FOR EUV, X-RAY, AND GAMMA-RAY ASTRONOMY IV | 2009年 / 7437卷

关键词：

Missions; X-ray astronomical instrumentation; X-ray telescopes; wide-field X-ray optics; X-ray astronomical surveys;

D O I：

10.1117/12.827468

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

X-ray mirrors are usually built in the Wolter I (paraboloid-hyperboloid) configuration which provides, in principle, perfect on-axis images. This design exhibits no spherical aberration on-axis but suffers from field curvature, coma and astigmatism, therefore the angular resolution degrades rapidly with increasing off-axis angles. Different mirror designs exist in which the primary and secondary mirror profiles are expanded as a power series in order to increase the angular resolution at large off-axis positions. Here we present the design and global trade off study of an X-ray mirror systems based on polynomial optics in view of the Wide Field X-ray Telescope (WFXT) mission. WFXT aims at performing an extended cosmological survey in the soft X-ray band with unprecedented flux sensitivity. To achieve these goals the angular resolution required for the mission is very demanding, of 5 arcsec HEW resolution goal to be achieved across a 1-deg field of view, in addition an effective area of 5-9000 cm(2) at 1 keV is needed.

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页数：10

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