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| WEPC096 |
APPLE Undulator for PETRA III
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2219 |
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- J. Bahrdt, H.-J. Baecker, W. Frentrup, A. Gaupp, M. Scheer, B. Schulz
BESSY GmbH, Berlin
- U. Englisch, M. Tischer
DESY, Hamburg
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Currently, the storage ring PETRA is being rebuilt to a light source with an ultra low emittance of only 1nm rad. The undulator radiation will take full advantage of this high performance. PETRA III will also provide circularly polarized light and linearly polarized light under arbitrary angles (inclined mode) within the energy range of 250-3000eV. The light will be produced with an APPLE II undulator which is under construction at BESSY at present. The total length of 5m and a minimum gap of only 11mm cause strong 3D forces. Due to the small good field region in an APPLE undulator and a small stay clear between the magnets and the vacuum chamber a sophisticated mechanical layout is required. The design will be presented, the expected residual mechanical deformations will be given and the consequences for the spectral performance will be discussed.
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| WEPC132 |
Damping Wigglers at the PETRA III Light Source
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2317 |
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- M. Tischer, K. Balewski
DESY, Hamburg
- A. M. Batrakov, I. V. Ilyin, D. Shichkov, A. V. Utkin, P. V. Vagin, P. Vobly
BINP SB RAS, Novosibirsk
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We report on the progress in construction of the PETRA III damping sections. A series of 10 permanent magnet wigglers followed by SR-absorbers will be installed in each of the two damping sections. Thereby, the emittance of the 6 GeV storage ring will be reduced down to 1 nmrad. Prototypes of all major components have meanwhile been characterized and a test assembly of one complete wiggler cell has been performed successfully. The wigglers have a period length of 200 mm and provide a peak field of 1.5 T. Most of the 4 m long devices have been fabricated and assembled. We present results of magnetic measurements and tuning.
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| WEPC133 |
Status of the PETRA III Insertion Devices
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2320 |
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- M. Tischer, M. Barthelmess, U. Englisch, J. Pflueger, A. Schoeps, J. Skupin
DESY, Hamburg
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The PETRA storage ring is presently reconstructed towards a third generation light source. In total, 14 undulator beamlines will be available in the new octant of the machine. We report on the status of Petra III undulators. Three prototypes with 29mm period length, two 2m and one 5m long device have been investigated by mechanical and magnetic measurements. The prototype results are the basis for the refined design of the remaining 8 planar devices which are in the procurement phase. We present preliminary magnetic results of the prototypes and also report on the APPLE–2 and the in-vacuum undulator for PETRA III.
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