Research project (1 month)
Laboratoire de Physique Nucléaire des Hautes Energies LPNHE-X
Ecole Polytechnique, Palaiseau, FRANCE
Antimatter research in telescopic measurements of the cosmic radiations
The aim of the research project named ARTEMIS (Anti-matter Research Through the Earth Moon Ion Spectrometer) was to detect in the cosmic radiations the presence of antimatter particles (especially extragalactic antiprotons). Such presence would represent an important presumption for the existence of antigalaxies. The method consists in observing the curvature of cosmic particles submitted to the Earth's magnetic field with the occultation effect of the Moon. Even if the Earth's magnetic field is very low, it can be used over thousand kilometers to deflect charged particles which have a very high energy (TeV) close to the earth. In order to determine the particles direction before deflection, a collimator is necessary. The moon plays this role but reversed. Indeed, it hides a part of the cosmic radiations that reach the Earth. Then, a deficit of particles ("shadows") can be measured in the isotrope back radiation. The depth of this "hole" corresponds to the cosmic particles flux that is studied. But in order to facilitate the study, the moon can be supposed as the only light source (nothing comes from space) in others words the presence and the absence of the particles are inverted. The moon is too lightly in regards to the Cerenkov radiations to observe. However, the ozone layer plays the role of an UV filter. During this month, the work performed consisted in selecting and analysing telescopic measurements of the Cerenkov light. A global parametric study (using the mathematical software called paw) has been made in order to eliminate the "noise" induced by the moon, and to evaluate the telescope elevation. Finally, the aim was to localize the presence of protons and antiprotons.
> back