A Lunar-based Soft X-ray Imager (LSXI) for the Earth’s magnetosphere

Guo, Yong; Wang, Chi; Wei, Fei; Sun, Tianran; Yu, Xiaohua; Peng, Songwu; Branduardi‐Raymont, G.; Sembay, S.

doi:10.1007/s11430-020-9792-5

Cited by 9 publications

(3 citation statements)

References 28 publications

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“…The methodology proposed in this paper is a preliminary attempt to reconstruct Earth's 3‐D magnetosphere using CT technology. This approach could also be applied in other detection missions, such as the Lunar Environment Heliospheric X‐ray Imager (LEXI) to be launched in the United States and the moon‐based X‐ray imaging system proposed by China (Guo et al., 2021). SMILE will run on a large elliptical orbit and its FOV will continue to change.…”

Section: Discussionmentioning

confidence: 99%

A 3D Magnetospheric CT Reconstruction Method Based on 3D GAN and Supplementary Limited‐Angle 2D Soft X‐Ray Images

Wang

Sun

et al. 2023

JGR Space Physics

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Section: Discussionmentioning

confidence: 99%

A 3D Magnetospheric CT Reconstruction Method Based on 3D GAN and Supplementary Limited‐Angle 2D Soft X‐Ray Images

Wang

Sun

et al. 2023

JGR Space Physics

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“…Finally, there are other geospace X-ray imaging missions, such as the ESA-China mission SMILE to be launched in 2025, 40 LSXI proposed to the call for the Chinese Lunar Exploration Program Phase IV, 41 and LEXI accepted as part of lunar landers from the United States. 42 For example, the SMILE's orbit is highly elliptical and highly inclined (70 deg to 98 deg), and the apogee distance is ∼19 R E .…”

Section: Future Collaborationsmentioning

confidence: 99%

GEOspace X-ray imager (GEO-X)

Ezoe,

Funase,

Nagata

et al. 2023

J. Astron. Telesc. Instrum. Syst.

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GEOspace X-ray imager (GEO-X) is a small satellite mission aiming at visualization of the Earth's magnetosphere by X-rays and revealing dynamic couplings between solar wind and the magnetosphere. In-situ spacecraft have revealed various phenomena in the magnetosphere. X-ray astronomy satellite observations recently discovered soft X-ray emissions originating from the magnetosphere. We are developing GEO-X by integrating innovative technologies of a wide field of view (FOV) X-ray instrument and a small satellite for deep space exploration. The satellite combines a Cubesat and a hybrid kick motor, which can produce a large delta v to increase the altitude of the orbit to about 30 to 60 R E from a relatively low-altitude (e.g., geo transfer orbit) piggyback launch. GEO-X carries a wide FOV (5 × 5 deg) and a good spatial resolution (10 arcmin) X-ray (0.3 to 2 keV) imaging spectrometer using a micro-machined X-ray telescope and a CMOS detector system combined with an optical blocking filter. We aim to launch the satellite around the solar maximum of solar cycle 25.

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“…The STORM 14 mission has been proposed to image the magnetosphere from a circular 30 RE orbit inclined 90 deg to the ecliptic. LSXI, another proposed Chinese mission, 15 will set an instrument on the Moon. On the other hand, GEO-X will obtain a bird’s-eye view of the magnetosphere from low inclined orbit (<30 deg), so the emitting regions can be clearly identified.…”

Section: Introductionmentioning

confidence: 99%

Development of the focal-plane CMOS detector for the GEO-X mission

Nakajima,

Nakamura,

Hagino

et al. 2023

J. Astron. Telesc. Instrum. Syst.

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We report a development status of a focal plane detector for the GEO-X (GEOspace X-ray imager) mission that will perform soft X-ray (≤ 2 keV) imaging spectroscopy of Earth's magnetosphere from a micro satellite. The mission instrument consists of a microelectromechanical systems (MEMS) X-ray mirror and a focal plane detector. A sensor with fine positional resolution and moderate energy resolution in the energy band of 0.3 to 2 keV is required. Because the observing target is the magnetosphere around the day-side Earth, the visible-light background must be decreased by shortening the integration time for readout. To satisfy the above requirements, a high-speed X-ray CMOS sensor is being evaluated as a primary candidate for the detector. Irradiating the flight candidate sensor with monochromatic X-rays, we obtained the energy resolution of 205 eV (FWHM) at 6 keV by cooling the devices to −15°C. Radiation tolerance of the sensor, especially in terms of total dose effect, is investigated with 100 MeV proton. The amount of degradation of energy resolution is < 50 eV up to 10 krad, which ensures that we will be able to track and calibrate the change of the line width in orbit.

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A Lunar-based Soft X-ray Imager (LSXI) for the Earth’s magnetosphere

Cited by 9 publications

References 28 publications

A 3D Magnetospheric CT Reconstruction Method Based on 3D GAN and Supplementary Limited‐Angle 2D Soft X‐Ray Images

A 3D Magnetospheric CT Reconstruction Method Based on 3D GAN and Supplementary Limited‐Angle 2D Soft X‐Ray Images

GEOspace X-ray imager (GEO-X)

Development of the focal-plane CMOS detector for the GEO-X mission

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