# New physics at high energies, cosmic rays, particle-detectors in space

New physics is expected at high energies and cosmic rays have high energies, so have there been or are there any plans to put particle detectors in space to study cosmic rays for new physics ?

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JEM-EUSO is designed to look for air showers caused by extremely high energy cosmic rays (>$10^{19}$ eV). According to the website, it will be attached to the International Space Station in 2016.

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There are particle detectors in space right now, and many more planned. They not are to used to study ultra-high energy cosmic rays because those puppies are very, very rare indeed.1 Instead they study electromagnetic bands that do not penetrate the atmosphere and cosmic rays a more ordinary energies.

1 Large scale ground arrays coupled with air fluorescence telescopes (i.e. Auger and its planned Northern hemisphere counterpart) cover many square kilometers, which should be compared to the less than 100 square meters size of a large satellite borne instrument.

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