Commissioning of the 100 MeV RaceTrack Microtron of the Metrology Light Source

In 2003, the metrology light source (MLS), a low energy electron storage ring as central instrument in the future Metrology Laboratory of the Physikalisch-Technische Bundesanstalt (PTB) was approved. Design, construction and operation of the MLS are realized by BESSY [1], based on the PTB requirements for a permanently accessible radiometric source, optimized for the spectral range from the UV up to the VUV [2] [3]. The MLS is tunable in energy between 200 MeV and 600 MeV. Based on the experiences at BESSY, a highly stable and reliable race track microtron (RTM) for injection was realized by Danfysik. The commissioning of the 100 MeV microtron at MLS started in January 2007. The concept and construction as well as the main parameters of the microtron are introduced.