Speaker
Reiner Denz
Description
During the shutdown of the LHC in 2009 the protection system for superconducting elements in the LHC QPS has been submitted to a substantial upgrade. The newly introduced layers of the QPS allow the monitoring and protection of the electrical interconnections between superconducting magnets with very high precision and extend the capability of the system to the timely detection of so-called aperture symmetric quenches in the LHC main magnets. In addition the immunity of the QPS with respect to powering failures has been improved by feeding all quench heater based protection systems by now two fully redundant UPS.
The presentation will recall the commissioning of these systems and describe the first experience during LHC operation. The overall dependability of the QPS system will be addressed including an overview of methods and tools for analysis, maintenance and diagnostics. Additional operational requirements for the exploitation of the QPS will be discussed. Finally the necessary steps to prepare the system for LHC operation at 5 TeV will be presented.
