Dr. Xiaoyi Li Profile

Dr. Xiaoyi Li

at NASA Goddard Space Flight Ctr

SPIE Involvement:

Author

Publications (7)

Proceedings Article | 22 August 2024 Poster

Implementing the LEM science program with a high spectral resolution wide field of view x-ray telescope

Daniel Patnaude, Frederick Porter, Ralph Kraft, Caroline Kilbourne, Simon Bandler, Akos Bogdan, Renata Cumbee, Megan Eckart, Cecilia Garraffo, Edmund Hodges-Kluck, Richard Kelley, Maxim Markevitch, Anna Ogorzalek, Paul Plucinsky, John ZuHone, Irina Zhuravleva, Jeremy Drake, Maurice Leutenegger, Steve Kenyon, Stephen Smith, Will Zhang, Stephen DePalo, Xiaoyi Li, Nathan Williams, Edward Amatucci, Janice Houston, Kathleen Coderre, Isaac Hayden, Elizabeth Osborne, Jeffrey Olson, Steven Ramm, Scott Richardson

Proceedings Volume 13093, 130937L (2024) https://doi.org/10.1117/12.3020433

Proceedings Article | 21 August 2024 Poster + Paper

The Line Emission Mapper (LEM): mission and science operations

P. Plucinsky, K. Martin, S. DePalo, S. Ramm, E. Amatucci, D. Burke, J. Houston, X. Li, J. Miller, D. Patnaude, F. Porter, S. Randall, J. Wing, C. Kilbourne, R. Kraft

Proceedings Volume 13093, 130937K (2024) https://doi.org/10.1117/12.3020570

KEYWORDS: Space operations, Equipment, X-rays, Calibration, Observatories, Sensors, Tunable filters, Mirrors, X-ray telescopes, Design

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The Line Emission Mapper (LEM) is a Probe mission concept developed in response to NASA’s Astrophysics Probe Explorer (APEX) Announcement of Opportunity. The LEM project is a collaboration between the Smithsonian Astrophysical Observatory (SAO), the NASA Goddard Space Flight Center (GSFC) and Lockheed Martin (LM). LEM is a large field of view (30′ equivalent diameter), soft X-ray mission (0.2-2.0 keV bandpass) with a large format microcalorimeter X-ray imaging spectrometer in the focal plane (1.3-2.5 eV spectral resolution) that provides unprecedented grasp (the product of effective area times field of view) in this bandpass. LEM’s sensitivity to diffuse X-ray emission will be orders of magnitude higher than existing or proposed missions. LEM’s primary science will characterize the diffuse gas in the X-ray haloes in galaxies, the outskirts of galaxy clusters and the filamentary structures between these clusters, and in the Milky Way star formation regions and Galactic halo, and Galactic and Local Group supernova remnants. To accomplish these objectives, the LEM spacecraft and mission have been designed to perform long observations of relatively faint objects and to perform an All-Sky Survey. The science payload consists of a single X-ray mirror assembly and a single focal plane instrument, the microcalorimeter operating at a temperature of 40 mK. The LEM spacecraft is a high-heritage, low-risk design that meets or exceeds all requirements, in particular the thermal requirements for the calorimeter, electronics, and mirror. The science mission profile supports high observing efficiency (> 90%), large sky coverage (45−150° field of regard), and flexible operations that maximize the science return. LEM mission and science operations follow the same successful approaches used by LM for 16 NASA missions and by SAO for 24 years of successful operation of a NASA Great Observatory, the Chandra X-ray Observatory. With multiple decades of experience developing and maintaining the Chandra X-Ray Center Data System, the LEM team will develop the software to produce and disseminate high-quality data to the entire astronomical community. In this paper, we discuss the design of the mission and spacecraft operations that supports the transformational science that LEM promises to deliver.

SPIE Journal Paper | 14 November 2023 Open Access

Line Emission Mapper: an X-ray probe mission concept to study the cosmic ecosystems and the physics of galaxy formation

Daniel Patnaude, Ralph Kraft, Caroline Kilbourne, Simon Bandler, Akos Bogdan, Renata Cumbee, Megan Eckart, Cecilia Garraffo, Edmund Hodges-Kluck, Richard Kelley, Maxim Markevitch, Anna Ogorzalek, Paul Plucinsky, Frederick Porter, John ZuHone, Irina Zhuravleva, Jeremy Drake, Maurice Leutenegger, Steve Kenyon, Stephen Smith, William Zhang, Stephen DePalo, Xiaoyi Li, Nathan Williams, Edward Amatucci, Janice Houston, Deme Apostolou, Hugh Kanner, Kathleen Coderre, Isaac Hayden, Kyle Martin, Elizabeth Osborne, Jeffrey Olson, Steven Ramm, Scott Richardson

JATIS, Vol. 9, Issue 04, 041008, (November 2023) https://doi.org/10.1117/12.10.1117/1.JATIS.9.4.041008

KEYWORDS: X-rays, Galactic astronomy, Design, Sensors, Equipment, X-ray optics, Astrophysics, Stars, Ecosystems, Tunable filters

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SPIE Journal Paper | 26 October 2023

Line emission mapper cryogenic system design

Elizabeth Osborne, Jeffrey Olson, Michael Jacoby, Isaac Hayden, Caroline Kilbourne, Simon Bandler, Xiaoyi Li, Edgar Canavan, Joseph Adams

JATIS, Vol. 9, Issue 04, 041007, (October 2023) https://doi.org/10.1117/12.10.1117/1.JATIS.9.4.041007

KEYWORDS: Cryocoolers, Design, Cryogenics, Tunable filters, Sensors, Interfaces, Staring arrays, X-rays, Head, Equipment

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SPIE Journal Paper | 19 October 2023 Open Access

Line emission mapper microcalorimeter spectrometer

Simon Bandler, Joseph Adams, Edward Amatucci, Edgar Canavan, James Chervenak, Renata Cumbee, Johannes P. Dercksen, Michael DiPirro, William Doriese, Megan Eckart, Manuel Gonzalez, Janice Houston, Brian Jackson, Amir Jahromi, Steven Kenyon, Caroline Kilbourne, Edmund Hodges-Kluck, Ralph Kraft, Xiaoyi Li, Maxim Markevitch, Dan McCammon, Jeffrey Olson, Elizabeth Osborne, Kazuhiro Sakai, Daniel Patnaude, Frederick Porter, Damien Prêle, Peter Shirron, Stephen Smith, Terrence Smith, Nicholas Wakeham, Henk van Weers

JATIS, Vol. 9, Issue 04, 041002, (October 2023) https://doi.org/10.1117/12.10.1117/1.JATIS.9.4.041002

KEYWORDS: Tunable filters, Design, Sensors, Time division multiplexing, X-rays, Staring arrays, Cryocoolers, Spectroscopy, Equipment, Detector arrays

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SPIE Journal Paper | 14 May 2019 Open Access

Lynx x-ray microcalorimeter cryogenic system

Michael DiPirro, Simon Bandler, Xiaoyi Li, Jeffrey Olson, James Tuttle, Wonsik Yoon, Mark Zagarola

JATIS, Vol. 5, Issue 02, 021006, (May 2019) https://doi.org/10.1117/12.10.1117/1.JATIS.5.2.021006

KEYWORDS: Cryocoolers, Cryogenics, X-rays, Magnetism, Staring arrays, Sensors, Reliability, Space operations, Electronics, Mathematical modeling

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Proceedings Article | 10 July 2018 Presentation

The wide field infrared survey telescope (WFIRST) observatory: design formulation (phase-A) overview (Conference Presentation)

Thomas Casey, Nerses Armani, Wes Alexander, Lisa Bartusek, Carl Blaurock, David Braun, Alexander Carra, David Content, Yves Conturie, Christine Cottingham, Richard Demers, Michael Dipirro, Robert Effinger, Robert Egerman, Frank Forkl, Guangjun Gao, John Gygax, John Hagopian, Timothy Hahm, John Hawk, Gurnie Hobbs, Clifton Jackson, Alden Jurling, Brian Kern, Jeffrey Kruk, Xiaoyi Li, Kuo-chia Liu, Catherine Marx, Marzouk Marzouk, Carson McDonald, Seke Godo, Mark Melton, James Mondello, M. Charley Noecker, Bert Pasquale, Hume Peabody, Ilya Poberezhskiy, Cory Powell, Giulio Rosanova, John Ruffa, Jeffrey Smith, Hong Tang, Christopher Tolman, Arthur Whipple, Timothy Wilson, Melissa Vess, Perry Voyer

Proceedings Volume 10698, 106982C (2018) https://doi.org/10.1117/12.2313748

KEYWORDS: Infrared telescopes, Space telescopes, Observatories, Telescopes, Infrared radiation, Optical instrument design, Infrared imaging, Exoplanets, Imaging spectroscopy, Coronagraphy

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