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Ai Numata
Researcher at Goddard Space Flight Center
Publications - 17
Citations - 209
Ai Numata is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Telescope & Polishing. The author has an hindex of 8, co-authored 17 publications receiving 160 citations.
Papers
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Journal ArticleDOI
High-Resolution, Lightweight, and Low-cost X-Ray Optics for the Lynx Observatory
William W. Zhang,Kim D. Allgood,Michael P. Biskach,Kai-Wing Chan,Michal Hlinka,John D. Kearney,James R. Mazzarella,Ryan S. McClelland,Ai Numata,Raul E. Riveros,Timo T. Saha,Peter M. Solly +11 more
TL;DR: An approach to build an x-ray mirror assembly that can meet Lynx’s requirements of high-angular resolution, large effective area, light weight, short production schedule, and low-production cost is described.
Proceedings ArticleDOI
Astronomical x-ray optics using mono-crystalline silicon: high resolution, light weight, and low cost
William W. Zhang,Kim D. Allgood,Michael P. Biskach,Kai-Wing Chan,Kai-Wing Chan,Michal Hlinka,John D. Kearney,James R. Mazzarella,Ryan S. McClelland,Ai Numata,Raul E. Riveros,Raul E. Riveros,Timo T. Saha,Peter M. Solly +13 more
TL;DR: In this article, an approach based on the precision polishing of mono-crystalline silicon to fabricate thin and lightweight X-ray mirrors of the highest figure quality and micro-roughness was proposed.
Proceedings ArticleDOI
Monocrystalline silicon and the meta-shell approach to building x-ray astronomical optics
William W. Zhang,Kim D. Allgood,Michael P. Biskach,Kai-Wing Chan,Kai-Wing Chan,Michal Hlinka,John D. Kearney,James R. Mazzarella,Ryan S. McClelland,Ai Numata,L. Olsen,Raul E. Riveros,Raul E. Riveros,Timo T. Saha,Peter M. Solly +14 more
TL;DR: A technology development program whose objective is to meet this three-fold requirement of making astronomical X-ray optics: angular resolution, photon-collecting area, and production cost, based on precision polishing of monocrystalline silicon for making a large number of mirror segments and on the metashell approach to integrate them into a mirror assembly.
Proceedings ArticleDOI
Reflective Coatings for the Future X-Ray Mirror Substrates
Hideyuki Mori,Takashi Okajima,William W. Zhang,Kai-Wing Chan,Kai-Wing Chan,Richard Koenecke,James R. Mazzarella,Ai Numata,L. Olsen,Raul E. Riveros,M. Yukita +10 more
TL;DR: In this article, a reflective coating by magnetron sputtering deposition onto precisely-fabricated thin X-ray mirrors was developed to remove distortion induced by the coating and then keep their surface pro les.
Proceedings ArticleDOI
Performance of NICER Flight X-Ray Concentrator
Takashi Okajima,Yang Soong,Erin Balsamo,Teruaki Enoto,Larry Olsen,Richard Koenecke,Larry Lozipone,John D. Kearney,S. P. Fitzsimmons,Ai Numata,Steven Kenyon,Zaven Arzoumanian,Keith C. Gendreau +12 more
TL;DR: In this paper, the authors presented a summary of the flight XRC performance as well as co-alignment results of the 56 XRCs on the flight payload as it is important to estimate the total effective for astronomical observations.