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Development of a low energy ion source for ROSINA ion mode calibration
Altwegg, Kathrin; Balsiger, Hans; Rubin, Martin +1 more
The European Rosetta mission on its way to comet 67P/Churyumov-Gerasimenko will remain for more than a year in the close vicinity (1 km) of the comet. The two ROSINA mass spectrometers on board Rosetta are designed to analyze the neutral and ionized volatile components of the cometary coma. However, the relative velocity between the comet and the …
Evaluation of the sensitivity to mechanical vibrations of an IR Fourier spectrometer
Saggin, B.; Comolli, L.
This article presents an experimental and theoretical investigation of the sensitivity to mechanical disturbances of a Fourier-transform infrared spectrometer, the Planetary Fourier Spectrometer, currently orbiting around Mars onboard ESA Mars Express orbiter. A theoretical analysis has been performed in order to highlight the expected effects of …
Solar and Heliospheric Observatory/Solar Ultraviolet Measurements of Estimated Radiation ultraviolet array detector distortion correction
Moran, Thomas G.
We present the technique used to correct the geometric distortion in the Solar and Heliospheric Observatory/Solar Ultraviolet Measurement of Estimated Radiation (SOHO/SUMER) ultraviolet spectrograph images. Electric and magnetic fields within the SUMER crossed delay line detectors and optical misalignment within the SUMER spectrograph cause focal …
Sputtering efficiency of LiF surfaces on impact of low energy neutral helium (20-80 eV): Calibration of the interstellar neutral helium instrument on ULYSSES
Rosenbauer, H.; Witte, M.; Banaszkiewicz, M. +1 more
For the detection of interstellar neutral helium particles entering the inner solar system, a novel detection technique has been developed using sputtering of secondary ions from lithium-fluoride (LiF) surfaces on the impact of He particles. In order to be able to determine the interstellar He fluxes, the detection efficiency had to be determined …