Optical design and simulations of the soft x-ray telescope for Einstein Probe mission

Yingyu Liao; Zhengxiang Shen; Qiushi Huang; Zhanshan Wang

doi:10.1117/12.2272079

29 August 2017 Optical design and simulations of the soft x-ray telescope for Einstein Probe mission

Yingyu Liao, Zhengxiang Shen, Qiushi Huang, Zhanshan Wang

Proceedings Volume 10399, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VIII; 103990L (2017) https://doi.org/10.1117/12.2272079
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

The Einstein Probe (EP) mission, which aims at discovering transients and monitoring variable objects in 0.5-4 keV Xrays, is a small scientific satellite dedicated to time-domain high-energy astrophysics. For this purpose, a large instantaneous field-of-view (60°×60°) X-ray telescope (WXT) is required in this mission, along with moderate spatial resolution (FWHM ~5′) and energy resolution. It will also carry a follow-up observation X-ray telescope (FXT) with a smaller field-of-viewcapable of much larger light-collecting power and better energy resolution than the main survey telescope. In this paper, we present the optical design and simulations of the FXT, which include the optimized structure parameters of the FXT and its focusing capabilities. The optical design and simulations are performed based on MATLAB program. The FXT employs conically-approximated Wolter-I geometry with a focal length of 2 m. And thin glasses with 100 mm in length and 0.3 mm in thickness are utilized as mirrors. To obtain a large collective area, the FXT will consist of 66 shells tightly-nested, whose diameters range from 80 mm to 250 mm based on the center of secondary mirrors. Seven different kinds of coatings will be deposited, designed by IMD. Based on such a kind of configuration, the effective area can be 245 cm² at 1 keV and 196 cm² at 4 keV, with an image quality to be approximately 56′′ in half-power diameter (HPD), and with a field of view (FOV) to be approximately 30′, theoretically.

Conference Presentation

Citation Download Citation

Yingyu Liao, Zhengxiang Shen, Qiushi Huang, and Zhanshan Wang "Optical design and simulations of the soft x-ray telescope for Einstein Probe mission", Proc. SPIE 10399, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VIII, 103990L (29 August 2017); https://doi.org/10.1117/12.2272079

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available