Author/Authors :
Ahn، نويسنده , , H.S. and Allison، نويسنده , , P.S. and Bagliesi، نويسنده , , M.G. and Beatty، نويسنده , , J.J. and Bigongiari، نويسنده , , G. and Boyle، نويسنده , , P. and Childers، نويسنده , , J.T. and Conklin، نويسنده , , N.B. and Coutu، نويسنده , , S. and Duvernois، نويسنده , , M.A. and Ganel، نويسنده , , O. H. Han، نويسنده , , J.H. and Jeon، نويسنده , , J.A. and Kim، نويسنده , , K.C. and Lee، نويسنده , , J.K. and Lee، نويسنده , , M.H. an، نويسنده ,
Abstract :
The use of detectors based on plastic scintillator with photomultiplier tubes (PMTs) is common in cosmic-ray experiments to differentiate particle charges. However, in the presence of a calorimeter, the standard method of pulse charge integration over a time longer than a PMT pulse is hampered by abundant albedo particles. The Cosmic Ray Energetics and Mass (CREAM) instrument surmounts this problem by measuring the peak voltage of the PMT pulse within ∼ 3 ns of a threshold crossing in the readout of a timing charge detector (TCD). The design and performance of the TCD is presented. A charge resolution of 0.2 e for oxygen and 0.4 e for iron is obtained for through-going cosmic-ray particles.
