Welcome to PERDaix


B-BEXUS 11-launch2.jpgPERDaix (Proton Electron Radiation Detector Aix- la-Chapelle) is a newly designed particle detector which was constructed by the Department of Physics 1bRWTH Aachen University. It makes heavy use of optical scintillating fibers that emit characteristic light pulses upon encountering cosmic rays and silicon photomultipliers (SiPM) for readout. 

On November 23rd 2010 PERDaix launched as part of the BEXUS-11 mission (Rocket and Balloon Experiments for University Students) at ESRANGE space center. After a three and a half hour flight at a maximum altitude of about 33 km PERDaix landed safely in eastern Finland at was recovered.

The main goal of the PERDaix detector is the measurement of high energetic cosmic particle fluxes and the effect of solar wind and the interplanetary magnetic field on these cosmic rays, the solar modulation of charged cosmic rays. It is designed to measure charged particles in the energy range of 0.5 GeV to 5 GeV.

View_at_35km_altitude.pngThe detector contains a time-of-flght system to measure particle velocities out of scintillation bars with silicon photomultiplier readout. A spectrometer with scintillating fibers and SiPM readout including a 0.2 Tesla permanent magnet to get the charge sign and momentum of the particles. And a transition radiation detector to identify particles species.

Technical Information: