Rocket-borne instrument with a high-resolution microchannel plate detector for planetary UV spectroscopy

Physics – Optics

Scientific paper

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Gas Spectroscopy, Microchannel Plates, Planetary Atmospheres, Radiation Detectors, Rocket-Borne Instruments, Ultraviolet Spectroscopy, Cesium, Far Ultraviolet Radiation, High Resolution, Jupiter Atmosphere, Photocathodes, Spectral Resolution, Ultraviolet Spectra

Scientific paper

A telescope-spectrograph employing a photon-counting microchannel plate (MCP)-CODACON detector has been built, tested, and flown on a sounding rocket. The detector uses a curved-channel MCP proximity focused onto a coded anode array of 1024 channels spaced 25.4-mm center to center. High quantum efficiency is obtained by depositing a cesium iodide photocathode on the front surface of the MCP. The instrument has obtained an ultraviolet spectrum of Jupiter with a spectral resolution of 8 A, which is higher than that of any previously reported observation in this wavelength range.

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