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Phys Rev Lett. 2003 Mar 7;90(9):094801. Epub 2003 Mar 6.

Brilliant, coherent far-infrared (THz) synchrotron radiation.

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BESSY mbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.


A new technology for generating steady state, brilliant, broadband, coherent, far-infrared (FIR) radiation in electron storage rings is presented, suitable for FIR spectroscopy. An FIR power increase of up to 100 000 compared to the normal, incoherent synchrotron radiation in the range of approximately 5 to approximately 40 cm(-1) could be achieved. The source is up to 1000 times more brillant compared to a standard Hg arc lamp. The coherent synchrotron radiation is produced in a "low alpha" optics mode of the synchrotron light source BESSY, by bunch shortening and non-Gaussian bunch deformation.

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