| Pàgina inicial > LHC magnet quench detection by trend analysis of the pressure signal |
| Published Articles | |
| Title | LHC magnet quench detection by trend analysis of the pressure signal |
| Author(s) | Charbonnier, Sylvie (Grenoble, INP) ; Rijllart, Adriaan (CERN) ; Gayet, Philippe (CERN) |
| Publication | 2013 |
| Number of pages | 6 |
| In: | 2013 IEEE International Instrumentation and Measurement Technology Conference, Minneapolis, MN, USA, 6-9 May 2013 |
| DOI | 10.1109/I2MTC.2013.6555476 |
| Subject category | Accelerators and Storage Rings |
| Accelerator/Facility, Experiment | CERN LHC |
| Abstract | CERN's LHC is composed of thousands of superconductor magnets that may sometimes quench (lose suddenly their superconducting properties). This paper presents a method to detect magnet quenches from the pressure of the helium inside the magnets. The method detects slight deflexions on the pressure signal created by a magnet quench. The deflexion is recognized through a trend analysis of the pressure filtered first derivative, where a specific shape formed of two consecutives temporal episodes signs the presence of a quench. The method was tested on a database composed of 30 pressure signals, where a total of 94 quenches occurred during the measurements. The results were analysed through a ROC curve and showed that the method was able to detect 84% of the quenches with only one false alarm. |