CASA-MIA

CASA-MIA was a ultra-high energy cosmic-ray (UHECR) detector in Utah operating during the 1990s. The aim was detection of cosmic-ray particles with energies above 100 TeV. CASA-MIA referred to a pair of detectors:

• CASA for Chicago Air Shower Array was an array of a thousand evenly-spread detectors spread under a quarter square kilometer to sense air showers, each detector consisting of a scintillator with photomultiplier tube (PMT) sensors.
• MIA for Michigan Muon Array was an underground array of a thousand muon detectors (similar to the above detectors in principle but designed for muon sensing) spread underneath the same plot of land, but arranged in groups.

Three other related experiments operated at the same time and place:

• BLANCA for Broad Lateral Non-imaging Cherenkov Array.
• DICE for Dual Imaging Cherenkov Experiment.
• a prototype for the High Resolution Fly's Eye (HiRes).

The location is that of an earlier cosmic-ray experiment called Fly's Eye and the later experiment, HiRes.