Commissioning Results and Improvements of the Machine Protection Sytem for Petra Iii

PETRA III is a high brilliant synchrotron light-source operating at 6GeV. The commissioning of the machine had started in April 2009 [1]. In the first months of operation the Machine Protection System (MPS) ran on basic MPS requirements to protect absorbers and vacuum chambers in the damping wiggler section and the undulator section against synchrotron light. Therefore several alarms distributed along the machine are identified and within 100μs a dump command is created. The beam is dumped within 400μs by switching off the RF system [2]. Prior to the first user runs different improvements increasing the reliability and availability were planned and partly implemented in the MPS. This paper presents commissioning results of the system and gives an overview of these new implementations as well as a more detailed discussion of some alarm conditions and the dump procedure. Additionally some key aspects of the Temperature Interlock as one major alarm deliverer are described.