Baumer Electric components on space mission.

 
The space observatory HERSCHEL, also known by the acronym F.I.R.S.T. (Far Infrared and Sub-millimeter Telescope), begins its mission in 2007. Throughout the duration of three to four year mission, studies about the origins of the galaxy in the early universe and its later evolution will be carried out. Further investigations will be made into the origins of stars and their interaction with dust and gas-shaped, cosmic matter (so-called interstellar matter). Using sophisticated scientific instruments, the chemical composition of the atmosphere’s and surfaces of comets, planets and satellites will be observed. HERSCHEL has the ability to see both infrared and wavelengths in the sub-millimeter range. This makes it possible to acquire observation data that was never before achievable.

The amplifier IF2, which Baumer Electric AG manufactured in collaboration with ETH Zürich and Contraves Space AG, is a central component to the spectrometer’s HIFI (high-resolution heterodyne spectrometer). The overlaying detection principle is based on the conversion of the frequency of the observed astronomical signal. This is done at a lower frequency where it is easier to carry out the required measurements. These measurements are obtained by mixing the input signal with a very stable mono-chromatic signal. This signal is generated by a local oscillator and extraction of the difference frequency for the subsequent treatment. HIFI covers an observation frequency response of 480…1910GHz within its seven bands. The difference signal of the overlaid process is sent to two spectrometers. There is a broadband and a high-resolution spectrometer which makes it possible to process the signals of both polarizations at the same time.

The IF2 was produced in line with the most stringent requirements for the manufacturing quality (wire bond, epoxy and soldering processes). The electronic components and structures used are pursued and tested at very low-temperatures (cryogenic) close to absolute zero at 10 Kelvin (-263°C). To fulfill these high requirements only specially certified components were used. To prove the application ability, all materials and production processes had to undergo an extensive qualification program. The innovative company, Baumer Electric AG, with its cutting-edge infrastructure, delivers technologies of the highest order. This is a minimum requirement for the high-quality standards demanded by the space industry.