Abstracts Brochure - CERN

THPLS019
THPLS020
THPLS021
29-Jun-06 16:00 - 18:00 THPLS — Poster Session
The Metrology Light Source: an Electron Storage Ring Dedicated to Metrology
R. Klein, G. Ulm (PTB) P. Budz, K. Buerkmann, J. Rahn, G. Wuestefeld
(BESSY GmbH)
452
PTB, the German National Metrology Institute,
in close cooperation with BESSY, is currently
setting up a low-energy electron storage
ring (200 MeV up to 600 MeV electron
energy), the Metrology Light Source MLS, which will be dedicated to metrology and technology development in the
UV and EUV spectral range which synchrotron radiation. The MLS has been designed by BESSY according to PTB
specifications. User operation is scheduled to begin in 2008. Currently, the building, housing the storage ring, is
nearly completed, and all major parts of the storage ring and the injection system have been ordered or have already
been delivered. The MLS will be equipped with all the instrumentation necessary to measure the storage ring parameters
needed for the calculation of the spectral photon flux according to the Schwinger theory with low uncertainty,
enabling PTB to operate the MLS as a primary source standard. Moreover, calculations show, that the MLS is ideally
suited for the production of coherent synchrotron radiation in the far IR and THz region. We give a status update on
the construction, the instrumentation for the measurement of the storage ring parameters and calculations for a low-
Progress Report on PETRA III
Starting from the middle of 2007, the existing
K. Balewski (DESY)
storage ring PETRA II at DESY will be converted
into the hard x-ray light source PETRA
III. The project was launched in 2002, and in preparation of the conversion a technical design report was published in
2004. Since then detailed design and construction of technical components have begun. Prototypes have been built
and tested and the procurement of major parts of the machine components such as magnets and vacuum chambers
has started. The project is well underway and in line with the goal of starting the rebuilding in 2007 and the commissioning
in 2009. In addition to an overall status report, the development of components and measurement results of
prototypes will be presented.
Dynamic Aperture Studies for PETRA III
PETRA III is a low-emittance storage ring
Y.J. Li, K. Balewski, W. Decking (DESY)
dedicated to synchrotron radiation. For efficient
injection in the so-called top-up mode,
the dynamic aperture has to be larger than 30mmmrad in the horizontal plane. This paper presents the choice of
tunes and the optimization of the sextupole configuration during the design stage of PETRA III. Tracking simulations
have been performed, including the non-linear effects of 20 four-meter-long damping wigglers and a representative
set of undulators. Misalignment and multipole errors are considered as well, leading to specifications for the magnet
design and alignment procedure.