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Related Experiment Video

Updated: May 21, 2025

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Development and Testing of a Novel Microstrip Photocathode ICCD for Lunar Remote Raman Detection.

Haiting Zhao1,2, Xiangfeng Liu1,2, Chao Chen3

  • 1Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences (CAS), Shanghai 200083, China.

Sensors (Basel, Switzerland)
|March 17, 2025
PubMed
Summary

A new microstrip photocathode intensified charge-coupled device (MP-ICCD) was developed for lunar Raman spectroscopy. This device achieves high performance, enabling accurate detection of lunar minerals in challenging conditions.

Keywords:
ICCDRaman spectroscopyimage intensifierlunar explorationtime gating

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Area of Science:

  • Planetary Science
  • Spectroscopy
  • Optoelectronics

Background:

  • Intensified charge-coupled devices (ICCDs) are crucial for remote Raman spectroscopy due to their low-light detection and time-gating capabilities.
  • Existing ICCDs present limitations in gating speed, sensitivity, resolution, miniaturization, and environmental adaptability for lunar missions.
  • Lunar remote Raman spectroscopy demands advanced detector technology to overcome challenges like extreme environments and faint signals.

Purpose of the Study:

  • To develop and validate a novel microstrip photocathode intensified charge-coupled device (MP-ICCD) tailored for lunar remote Raman spectroscopy.
  • To establish a comprehensive testing methodology for evaluating key MP-ICCD performance metrics.
  • To demonstrate the feasibility of using the MP-ICCD in a prototype spectrometer for in-situ lunar mineral analysis.

Main Methods:

  • Development of a microstrip photocathode intensified charge-coupled device (MP-ICCD).
  • Implementation of a testing protocol to assess optical gating width, gain voltage, and resolution.
  • Integration of the MP-ICCD into a prototype remote Raman spectrometer with a 40 mm aperture telescope.
  • Field testing under outdoor sunlight conditions to detect lunar mineral Raman spectra.

Main Results:

  • The MP-ICCD achieved a minimum optical gating width of 6.0 ns and an optimal gain voltage of 870 V.
  • The detector's resolution met the necessary standards for Raman spectroscopy.
  • The prototype spectrometer successfully identified Raman spectra of quartz, olivine, pyroxene, and plagioclase at 1.5 m under solar illumination.

Conclusions:

  • The developed MP-ICCD offers a viable solution for the demanding requirements of lunar remote Raman spectroscopy.
  • The study provides critical technical support and experimental validation for deploying advanced ICCD technology on the Moon.
  • This advancement paves the way for enhanced in-situ mineralogical analysis on lunar missions.