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Poster session: Synchrotron radiation sources and free-electron la- sers

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    138. P.Budz, K.Buerkamnn, M.Abo-Bakr, W.Anders, O.Dressler, V.Duerr, J.Feikes,

    • H.

      G.Hoberg, P.Kuske, R.Lange, J.Rahn, T.Schneegans, E.Weihreter, G.Wuestefeld (BESSY mbH, Berlin, Germany), D.Kraemer (GSI, Darmstadt, Germany), I.Churkin (Budker Institute of Nuclear Physics, Novosibirsk, Russia), R.Klein, G.Ulm (PTB, Berlin, Germany)

Status of Metrology Light Source in Berlin

For more than 25 years, the Physikalisch-Technische-Bundesanstalt (PTB) uses synchro- tron radiation at the storage rings BESSY I and II for photon metrology in the spectral range of UV to x-rays. Since decommissioning of BESSY I (1999), there is a gap in the spectral range of UV and EUV wavelength due to the higher electron energy of BESSY II. Thus, in 2003, the Metrology Light Source (MLS), a electron storage ring of low en- ergy, was approved as central instrument in the future Willy Wien Laboratory (WWL). Design, construction and operation of the MLS are realized by BESSY, based on the PTB requirements for a permanent accessible radiometry source, optimized for the spectral range between UV up to VUV. The MLS is tuneable in energy between 200 MeV and 600 MeV, designed for currents between 1pA up to 200mA. Civil construction of WWL in the close vicinity to BESSY is nearing completion. The assembly of the MLS is running, commissioning of the 100MeV Microtron is scheduled for summer 2006, while commis- sioning of the storage ring will start in spring 2007. Regular user operation will begin in January 2008. A status and an overview on the construction of the MLS are given.

Dr. Peter Markus Budz: budz@bessy.de

P.139. V.Korchuganov, A.Valentinov (RRC Kurchatov Institute, Moscow), N.Mezentsev (Budker Institute of Nuclear Physics, Novosibirsk, Russia)

An Influence of 7.5 T superconducting wiggler on beam parameters of Siberia-2 storage ring

At present the dedicated synchrotron radiation source Siberia-2 in Kurchatov Institute op- erates with electron energy 2.5 GeV and current up to 200 mA. In order to expand spectral range of SR and to increase brightness an installation of 7.5 T 19-pole superconducting wiggler is planned at the end of 2006. Now the wiggler is under fabrication in BINP, No- vosibirsk. Such high level of a magnetic field in the wiggler will have a great influence on electron beam parameters of Siberia-2. Changes of these parameters (betatron tunes, hori- zontal emittance of the electron beam, momentum compaction, energy spread etc.) are discussed in the report. Different methods of compensation (global and local) of betatron functions distortion are presented. Much attention is paid to dynamic aperture calculations using analytical approximation of magnetic field behavior in transverse horizontal direc- tion.

Dr. Vladimir Nicolaevich Korchuganov: korchuganov@kcsr.kiae.ru


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