Author: Lensch, T.
Paper Title Page
MOPG032 Synchronized Post Mortem Trigger of the PETRA III MPS 98
 
  • T. Lensch, M. Werner
    DESY, Hamburg, Germany
 
  PETRA III is a high brilliant synchrotron light-source operating at 6 GeV at the DESY site in Hamburg. The Machine Protection System (MPS) of PETRA III determines unsafe situations by a number of different alarms and dumps the beam if necessary. Additionally the MPS measures the beam current with a dedicated DC monitor and creates a post mortem trigger if a beam loss has been detected. This trigger is distributed to each PETRA hall synchronously and is connected to several external systems. These systems store their ring-buffer-data in case of such a post mortem trigger. Especially the beam position monitor system (BPM) benefits from this trigger. This paper describes the creation and distribution of the trigger by the MPS as well as an example of use when interpreting beam losses with collected BPM data.