Mars Ion and Neutral Particle Analyzer (MINPA) for Chinese Mars Exploration Mission (Tianwen-1): Design and ground calibration

Kong, LingGao; Zhang, AiBing; Tian, Zhen; Zheng, XiangZhi; Wang, WenJing; Liu, Bin; Wurz, Peter; Piazza, Daniele; Etter, Adrian; Su, Bin; An, YaYa; Ding, JianJing; Li, WenYa; Liu, Yong; Li, Lei; Li, YiRen; Tan, Xu; Sun, YueQiang (2020). Mars Ion and Neutral Particle Analyzer (MINPA) for Chinese Mars Exploration Mission (Tianwen-1): Design and ground calibration. Earth and planetary physics, 4(4), pp. 333-344. Wiley 10.26464/epp2020053

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The main objective of the Mars Ion and Neutral Particle Analyzer (MINPA) aboard the Chinese Mars Exploration Mission (Tianwen-1) is to study the solar wind–Mars interaction by measuring the ions and energetic neutral atoms (ENAs) near Mars. The MINPA integrates ion and ENA measurements into one sensor head, sharing the same electronics box. The MINPA utilizes a standard toroidal top-hat electrostatic analyzer (ESA) followed by a time of flight (TOF) unit to provide measurement of ions with energies from 2.8 eV to 25.9 keV and ENAs from 50 eV to 3 keV with a base time resolution of 4 seconds. Highly polished silicon single crystal substrates with an Al2O3 film coating are used to ionize the ENAs into positive ions. These ions can then be analyzed by the ESA and TOF, to determine the energy and masses of the ENAs. The MINPA provides a 360°×90° field of view (FOV) with 22.5°×5.4° angular resolution for ion measurement, and a 360°×9.7° FOV with 22.5°×9.7° angular resolution for ENA measurement. The TOF unit combines a –15 kV acceleration high voltage with ultra-thin carbon foils to resolve H+, He2+, He+, O+, O2+ and CO2+ for ion measurement and to resolve H and O (≥ 16 amu group) for ENA measurement. Here we present the design principle and describe our ground calibration of the MINPA

Item Type:

Journal Article (Original Article)


08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Physics Institute

UniBE Contributor:

Wurz, Peter; Piazza, Daniele and Etter, Adrian


500 Science > 520 Astronomy
600 Technology > 620 Engineering








Dora Ursula Zimmerer

Date Deposited:

25 Feb 2021 12:01

Last Modified:

25 Feb 2021 12:01

Publisher DOI:





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