The Einstein Probe Mission

Yuan, Weimin; Zhang, Chen; Chen, Yong; Ling, Zhixing

doi:10.1007/978-981-16-4544-0_151-1

Cited by 38 publications

(29 citation statements)

References 35 publications

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“…For this purpose, detectors with a relatively wide energy response are necessary to accurately measure the exact spectra of GRBs. We note that the Einstein Probe, a wide field (3600 square degree) X-ray satellite that is scheduled to be launched in late 2023 (Yuan et al 2018(Yuan et al , 2022, might be very helpful in this aspect. Einstein Probe is very sensitive in X-rays and may markedly help increase the sample size of well-localized GRBs.…”

Section: Discussionmentioning

confidence: 99%

Introduction to the Department of Cardiology in Nanjing First Hospital of Nanjing Medical University, China

Zhang

Chen

2020

European Heart Journal

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Reclosure of ruptured incision after peroral endoscopic myotomy using endoloops and metallic clipsSince Inoue et al. introduced peroral endoscopic myotomy (POEM) into a clinic to treat esophageal achalasia in 2010, the procedure has been carried out in many countries around the world. 1 As more and more POEM is being done, associated technical difficulties and complications may occur. 2 To our knowledge, the present study is the first to report incision rupture after POEM.A 37-year-old man presented to our academic center after experiencing 25 years of dysphagia and 2 months of exacerbation. Barium swallow examination and esophageal manometry diagnosed the patient with type I esophageal achalasia and he agreed to receive POEM.POEM was carried out using the standard technique. After the operation, the patient received routine postoperative care. On the third day after the procedure, the patient had a fever (38.9°C, white blood cell count 18.24 × 10 9 /L, % neutrophils 95.3%) and X-ray showed the absence of several metal clips at the proximal end of the longitudinal incision which revealed the incision rupture.Gastroesophageal endoscopy showed that the middle and proximal parts of the incision was ruptured. It was not possible to reclose the incision with routine clips because of the swollen mucosa around the defect. On endoscopy, an endoloop was inserted and snared the remaining clips in the distal part. In the middle, four clips were anchored onto the defect margins at full thickness and another endoloop was inserted to snare the clips tightly. The same procedure was done in the proximal part (Figs 1,2). After monitoring the patient's condition for several days, he was discharged without any complaints or complications.In the present study, we propose reclosure of a mucosal incision after POEM using conventional endoloops and hemostatic clips. It could reclose the incision regardless of the swollen tissue or the size of the longitudinal incision.

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Section: Discussionmentioning

confidence: 99%

Introduction to the Department of Cardiology in Nanjing First Hospital of Nanjing Medical University, China

Zhang

Chen

2020

European Heart Journal

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“…Besides lobster-eye MPO, anther novel technique employed for WXT is a large array of CMOS sensors used as focal plane detectors (Yuan et al 2022) A pathfinder for the EP-WXT and telescopes of this kind was proposed in 2019 by the EP team. The aims are to verify the in-orbit performance of both the MPO and CMOS components used for the EP-WXT, and to optimize the operational instrumental parameters in space.…”

Section: Introductionmentioning

confidence: 99%

The Lobster Eye Imager for Astronomy Onboard the SATech-01 Satellite

Ling¹

2023

Res. Astron. Astrophys.

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The Lobster Eye Imager for Astronomy (LEIA), a pathfinder of the Wide-field X-ray Telescope of the Einstein Probe (EP) mission, was successfully launched onboard the SATech-01 satellite of the Chinese Academy of Sciences on 27 July 2022. In this paper, we introduce the design and on-ground test results of the LEIA instrument. Using state-of-the-art Micro-Pore Optics (MPO), a wide field-of-view (FoV) of 346 square degrees (18.6 degrees × 18.6 degrees) of the X-ray imager is realized. An optical assembly composed of 36 MPO chips is used to focus incident X-ray photons, and four large-format complementary metal-oxide semiconductor (CMOS) sensors, each of 6 cm × 6 cm, are used as the focal plane detectors. The instrument has an angular resolution of 4 – 8 arcmin (in FWHM) for the central focal spot of the point spread function, and an effective area of 2 − 3 cm2 at 1 keV in essentially all the directions within the field of view. The detection passband is 0.5 – 4 keV in the soft X-rays and the sensitivity is 2 − 3 × 1011 erg s-1 cm-2 (about 1 mini- Crab) at 1,000 second observation. The total weight of LEIA is 56 kg and the power is 85 W. The satellite, with a design lifetime of 2 years, operates in a Sun-synchronous orbit of 500 km with an orbital period of 95 minutes. LEIA is paving the way for future missions by verifying in flight the technologies of both novel focusing imaging optics and CMOS sensors for X-ray observation, and by optimizing the working setups of the instrumental parameters. In addition, LEIA is able to carry out scientific observations to find new transients and to monitor known sources in the soft X-ray band, albeit limited useful observing time available.

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“…In August 2022, the performance of a customized 6 cm × 6 cm large-format X-ray sCMOS sensor has been successfully verified in orbit by the Lobster Eye Imager for Astronomy (LEIA) onboard the SATech-01 satellite [7,8]. In the future, missions such as Einstein Probe (EP) [9,10] and THESEUS [11] will use sCMOS sensors as focal plane detectors.…”

Section: Introductionmentioning

confidence: 99%

Investigating the image lag of a scientific CMOS sensor in X-ray detection

Wu,

Ling,

Zhang

et al. 2023

Preprint

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In recent years, scientific CMOS (sCMOS) sensors have been vigorously developed and have outperformed CCDs in several aspects: higher readout frame rate, higher radiation tolerance, and higher working temperature. For silicon image sensors, image lag will occur when the charges of an event are not fully transferred inside pixels. It can degrade the image quality for optical imaging, and deteriorate the energy resolution for X-ray spectroscopy. In this work, the image lag of a sCMOS sensor is studied. To measure the image lag under low-light illumination, we constructed a new method to extract the image lag from X-ray photons. The image lag of a customized X-ray sCMOS sensor GSENSE1516BSI is measured, and its influence on X-ray performance is evaluated. The result shows that the image lag of this sensor exists only in the immediately subsequent frame and is always less than 0.05% for different incident photon energies and under different experimental conditions. The residual charge is smaller than 0.5 e − with the highest incident photon charge around 8 ke − . Compared to the readout noise level around 3 e − , the image lag of this sensor is too small to have a significant impact on the imaging quality and the energy resolution. The image lag shows a positive

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The Einstein Probe Mission

Cited by 38 publications

References 35 publications

Introduction to the Department of Cardiology in Nanjing First Hospital of Nanjing Medical University, China

Introduction to the Department of Cardiology in Nanjing First Hospital of Nanjing Medical University, China

The Lobster Eye Imager for Astronomy Onboard the SATech-01 Satellite

Investigating the image lag of a scientific CMOS sensor in X-ray detection

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