GravitationalRadiation Antenna In Leiden

Kamerlingh Onnes Laboratory, Leiden University, The Netherlands

Projects for students



Data analysis: Veto with cosmic ray detectors (HiSPARC).

Student project
The earth is being hit by cosmic rays (high energy particles, mainly protons and ?-particles, but occasionally also heavier particles) continuously. When a cosmic particle hits a gravitational wave detector, the local heating of the material will cause expansion, exciting the acoustic modes of the detector. This effect has already been seen by the 2 Italian bar detectors NAUTILUS and EXPORER. These signals cannot be distinguished from gravitational waves, so the detector signals must be vetoed by a cosmic ray detector. Two cosmic ray detectors (part of the HiSPARC project) have been placed above MiniGRAIL and there is the software to create an event list. The task in this project is to generate an event list from the filtered MiniGRAIL data (Wiener filter) and compare the extracted data with HiSPARC event list and filter out matching events.