Development of Radio Astronomy in Germany until the Effelsberg Telescope. ,,East and West - The Common European Heritage''. Ed. by Éwa Wyka, Maciej Kluza and Anna Karolina Zawada. Kraków: Jagiellonian University Museum 2007, S.

Description
Development of Radio Astronomy in Germany until the Effelsberg Telescope. ,,East and West - The Common European Heritage''. Ed. by Éwa Wyka, Maciej Kluza and Anna Karolina Zawada. Kraków: Jagiellonian University Museum 2007, S. 129-136, S.

Please download to get full document.

View again

of 1
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Information
Category:

Physics

Publish on:

Views: 2 | Pages: 1

Extension: PDF | Download: 0

Share
Tags
Transcript
  Gudrun Wolfschmidt: Development of Radio Astronomy in Germany – 21st September 2007 Development of Radio Astronomy in Germany until the EffelsbergTelescope Gudrun Wolfschmidt, Institute for History of Science, Hamburg University XXV SIC Symposium, Krakow 11-15 September 2006Development of Radio astronomy in Germany until the Ef-felsberg TelescopeKeywords: Radio telescope, reflector, amplifier, antenna, RADAR Abstract After the discovery of electromagnetic waves by Heinrich Hertz (1857–1894) in 1887, onetried to find cosmic signals or extraterrestrial radio waves since 1896. In the 1930s radiosignals from the Milky Way and from the Sun were discovered with a system of antennasor later with reflectors. A parabolic dish was used; in the focal point a vibration wasinduced in the dipole.With the German “Würzburg-Riese” (7.5-m-reflector for RADAR) radio astronomystarted after the war; especially in the Netherlands, UK and Australia. In Germany inthe 1950s four centers were built up: Kiel (dipole antenna array and 7.5-m-reflector),Freiburg (3-m- reflector and radiospectrograph), Berlin-Adlershof/GDR (36-m-transittelescope) and Potsdam/GDR (several antennas for solar radio astronomy).Since 1952 Friedrich Becker (1900–1985) started to plan a first large German radiotelescope, a 25-m-reflector, Stockert, Eifel (1956). Shortly together with Dwingeloo(25-m-reflector) it was the largest in the world. Very quickly the dimensions of radiotelescopes were increased – a development in the direction of Big Science.In the 1960s one tried to get a new telescope: In 1971 the 100-m-diameter antennawas inaugurated (MPI for Radio astronomy, Bonn) – it was until 2000 the largest fullysteerable radio telescope in the world.Finally the development of amplifiers will be discussed (electronic tubes with Yagiantennas, parametric amplifiers since 1960, Maser, transistors since the 1970s, HEMT). 1
Related Search
Similar documents
View more...
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks