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.
引用
收藏
页数:10
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