Author/Authors :
A. Gorine، نويسنده , , A. and Kasahara، نويسنده , , K. and Kobayashi، نويسنده , , M. and Kuroda، نويسنده , , Gregory K. and Maki، نويسنده , , T. and Manuilov، نويسنده , , I. and Murakami، نويسنده , , H. and Okada، نويسنده , , K. and Riazantsev، نويسنده , , A. and Takeutchi، نويسنده , , F. and Tamura، نويسنده , , T. and Torii، نويسنده , , S. and Yamagami، نويسنده , , T. and Yoshimura، نويسنده , , Y.، نويسنده ,
Abstract :
In view of implementing a topological trigger criterion in cosmic-ray detectors for efficient selection of required events a preliminary test has been done with a scintillating-fibre hodoscope using a position-sensitive photomultiplier. A space resolution of ∼0.6 mm in σ with a detection efficiency >97% has been obtained for charged particles of 5 GeV/c passing through 2×2 mm squared fibres. A custom-made discriminator, suppressing the cross-talk between adjacent fibres, allowed a better definition of track position even at high incident angles compared to the simple threshold discriminators. Simplicity as well as reliability of the prototype allow us to foresee a topological trigger device incorporated in different type of detectors, such as cosmic gamma or electron telescopes, solar neutron detectors and so on.
