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SKALTA Experiment: Detecting Cosmic Rays at P.J. Šafárik University, Košice

The SKALTA experiment has been active since June 2010 at P.J. Šafárik University in Košice. Its primary purpose is to detect secondary cosmic rays generated from high-energy primary particles (≥ 10^14 eV). The experiment also serves as an educational platform for students studying elementary particle physics. A barometric station nearby contributes data on cosmic rays, which can impact atmospheric chemistry, including ozone depletion and carbon-14 levels. SKALTA is part of an extensive detector network that aims to expand its outreach by installing detectors in more educational institutions.

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SKALTA Experiment: Detecting Cosmic Rays at P.J. Šafárik University, Košice

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  1. SKALTA experiment SlovaKiAn Large-area Time coincidence Array

  2. Where? When? • The roof of P. J. Šafárik University in Košice • The experiment is active since June 2010

  3. Purpose • Detection of secondary cosmic rays from a primary particle of energy at least 1014 eV • Education and motivation for elementary particle physics students • ...also, barometric station in the area.

  4. Cosmic rays • High energy particles from outside of the Solar system (or possibly even from outside of the galaxy) • Interaction of primary cosmic rays with Earth’s atmosphere => secondary cosmic rays • Typical particles: • Primary c.r. - protons and α-particles • Secondary c.r. - neutrons, pions, positrons, muons

  5. Contribution of the cosmic rays • Chemical reactions in the atmosphere: • Depletion of ozone • Maintaining the amount of carbon-14 (as well as few other different isotopes) • They are part of the ambient radiation • Considerable effect on electronics (mainly in higher altitude)

  6. The array • Three detectors • A triangle with side length of 10 m • GPS • Computing station

  7. Legacy of ALTA • It began with ALTA (Alberta Large-area Time-coincidence Array) located in Alberta, Canada • SKALTA is part of huge detector network • Partners: • CZELTA – located in several places throughout the Czech Republic • NALTA – located in Canada, mostly in Edmonton • RoLTA – located in Romania • All the data is now stored at Czech Technical University, Prague, Czech Republic

  8. ROOT Framework • Used for education • Is a preparation for the real analysis framework AliRoot • All the data is available online on the site of the project

  9. Future goals • To install more detectors on the roofs of other university buildings as well as the roofs of several grammar schools • To make possible even for younger students to try such measurements on their own

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