1. Machine Protection System @ TTF Martin Staack DESY MVP TTF2 Review Meeting at Salzau, 20.-22. January 2003

2. Martin Staack, DESY MVP22. January 20032 What is the purpose? The Machine Protection System... switches off the beam in case of subsystem failure protects the accelerator from damage minimizes activation by beam losses manages beam permissions displays information about machine status collects information about subsystem failures

3. Martin Staack, DESY MVP22. January 20033 Main Components of the MPS Collimators passive machine protection PLC „Beam Interlock System“ (BIS) processing slow Interlock signals (ms)processing slow Interlock signals (ms) manage Operation Modes and Beam Modesmanage Operation Modes and Beam Modes processes status information for the control systemprocesses status information for the control system Beam Interlock Concentrator (BIC) processing fast Interlock signals (2-3 µs)processing fast Interlock signals (2-3 µs) Photomultipliers, Toroid system fast Beam Loss detection

4. Martin Staack, DESY MVP22. January 20034 TTF Operation Modes...are determined by Machine settings

5. Martin Staack, DESY MVP22. January 20035 TTF Beam Modes Beam Modes @ TTF... Long Pulse Train (800µs) Short Pulses (10 bunches) Single Bunch No beam...are determined by Operation Mode Collimator and Screen positions Beam losses Operator wishes

6. Martin Staack, DESY MVP22. January 20036 Signal flow in the MPS

7. Martin Staack, DESY MVP22. January 20037 Overview over the MPS

8. Martin Staack, DESY MVP22. January 20038 Laserinterlock Laserinterlock (Siemens PLC) protects the Laser from damage in case of subsystem failureprotects the Laser from damage in case of subsystem failure provides information about system statusprovides information about system status processes status information for the control systemprocesses status information for the control system independent system for the backup laserindependent system for the backup laser

9. Martin Staack, DESY MVP22. January 20039 The end