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Background <p>The Einstein probe (EP) is an X-ray astronomical satellite dedicated to time-domain astronomy and high-energy astrophysics. Initiated at the end of 2017, it was successfully launched on January 9, 2024. The follow-up X-ray telescope (FXT) is a key payload on the EP satellite. The FXT employs PNCCD as its focal plane detector. Its electronic components include the electronic control box (EC-Box), the detector electronics boxes (DE-Box), the refrigerator controller, the movement mechanisms controller, and the temperature control instrument.</p> Methods <p>The FXT conducted functional performance tests in-orbit as planned, including three operating modes of the detector, energy detection range, and energy resolution.</p> Results <p>Since FXT became operational in orbit, all electronic equipment has been working stably. The FXT has an energy detection range of 0.3–10 keV, with an energy resolution of approximately 92&#xa0;eV&#xa0;@&#xa0;1.25&#xa0;keV, and an electronic noise of about 3.3 <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41605_2025_586_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="20" /> </InlineMediaObject> <EquationSource Format="TEX">\(\hbox {e}^{-}\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mtext>e</mtext> <mo>-</mo> </msup> </math></EquationSource> </InlineEquation>.</p>

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EP-FXT electronics development and in-orbit performance

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • Weiwei Cui,
  • Xiaofan Zhao,
  • Hao Wang,
  • Jingjing Xu,
  • Norbert Meidinger,
  • Jia Huo,
  • Ziliang Zhang,
  • Wei Li,
  • Laidan Luo,
  • Houlei Chen,
  • Qingjun Tang,
  • Lin Li,
  • Ming Wang,
  • Huaqiu Liu,
  • Fei Li,
  • Isabell Keil,
  • Juan Wang,
  • Yanji Yang,
  • Jia Ma,
  • Yusa Wang,
  • Dawei Han,
  • Zijian Zhao,
  • Xiongtao Yang,
  • Yuxuan Zhu,
  • Haoyang Geng,
  • Yong Chen

摘要

Background

The Einstein probe (EP) is an X-ray astronomical satellite dedicated to time-domain astronomy and high-energy astrophysics. Initiated at the end of 2017, it was successfully launched on January 9, 2024. The follow-up X-ray telescope (FXT) is a key payload on the EP satellite. The FXT employs PNCCD as its focal plane detector. Its electronic components include the electronic control box (EC-Box), the detector electronics boxes (DE-Box), the refrigerator controller, the movement mechanisms controller, and the temperature control instrument.

Methods

The FXT conducted functional performance tests in-orbit as planned, including three operating modes of the detector, energy detection range, and energy resolution.

Results

Since FXT became operational in orbit, all electronic equipment has been working stably. The FXT has an energy detection range of 0.3–10 keV, with an energy resolution of approximately 92 eV @ 1.25 keV, and an electronic noise of about 3.3 \(\hbox {e}^{-}\) e - .