Abstract
A cosmic ray magnetic spectograph for measurements of muon spectra and charge ratio at sea level in the high energy region has been constructed. This spectograph can be turned in a continuous way from a vertical to a horizontal position. The solid angle of the spectograph is defined by a telescope of four scintillation counters, the deflection of the muons takes place in a solid iron magnet, and the tracks are indicated by six double gap spark chambers which are photographed. The acceptance of the apparatus amounts to 15.8 cm 2sr. The geometrical acceptance half-angle is 5.2° in the deflection plane as well as in the perpendicular plane. The lowest momentum that can be measured with the apparatus is 7 GeV/ c and the maximum detectable momentum is about 1 TeV/ c.
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