New fast closing shutter for the PETRA III beamlines

• Published in: Journal of physics. Conference series Vol. 100; no. 9; p. 092028
• Main Authors: Hahn, U, Hesse, M, Müller, S, Peters, H-B, Timmann, B, Wengler, R, Zink, H
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.03.2008
• Subjects: Light sources; Physics; Radiation; Synchrotron radiation; Synchrotrons; Transportation systems
• ISSN: 1742-6596; 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/100/9/092028

The conversion of the PETRA storage ring at the Deutsches Elektronen Synchrotron (DESY) to the third generation synchrotron radiation light source PETRAIII [1] poses a challenge to the design of the beamline transport system. One of these challenges is to supply 14 beamlines and experiments windowless with the extremely collimated undulator radiation from the storage ring. The windowless connection includes the risk of accidental venting of the storage ring by experiments connected to the beamlines. To stop the inrush of such an accidental venting fast closing shutter (FCS) systems with closing times in the 10msec range are mandatory. The strong radiation background in the storage ring tunnel requires the installation of all metal valves. A new small fast closing shutter with an aperture of 40mm fitting to the strong collimated undulator beams and with a closing time < 10msec was developed. The all metal sealing principle achieves leak rates smaller than 10mbarl/sec. This leak rate of the fast closing shutter combined with a standard all metal valve prevents venting of the storage ring and the beam time losses for all users. The mechanical and electronic layouts as well as first experiences with the new fast closing shutter system developed for PETRAIII are presented.