Accelerator Physical Issues of PETRA III - A New Low Emittance Light Source
- Deutsches Elektronen Synchrotron (DESY), Hamburg (Germany)
The reconstruction of the 2304 m long existing storage ring PETRA II into a dedicated Light Source PETRA III is presented. Envisaged is a machine with an energy of 6 GeV and an emittance of 1 nmrad operating with a current of at least 100 mA. The ring will provide 9 straight sections for the installation of undulators. For this purpose one eights of PETRA will be converted into a section of DBA cells. Two modes of operation are foreseen. One with a very high number of bunches and a second one with a considerably lower number of bunches allowing time resolved measurements. In the later mode the Touschek effect severely limits the beam lifetime to the order of an hour. To compensate for the rapid losses a frequent refilling of the machine is necessary. This procedure is usually called topping up mode. The low emittance in combination with the optics at the insertion devices leads to very small beam dimensions especially in the vertical plane. Therefore a sophisticated beam position control system is mandatory. To combat the multi bunch instabilities driven by the higher order modes of the cavities a powerful wideband feedback system is required.
- OSTI ID:
- 20652793
- Journal Information:
- AIP Conference Proceedings, Vol. 705, Issue 1; Conference: 8. international conference on synchrotron radiation instrumentation, San Francisco, CA (United States), 25-29 Aug 2003; Other Information: DOI: 10.1063/1.1757744; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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