Author/Authors :
Park، نويسنده , , N.H. and Ahn، نويسنده , , H.S. and Ganel، نويسنده , , O. H. Han، نويسنده , , J.H. and Jeon، نويسنده , , J.A. and Kim، نويسنده , , C.H. and Kim، نويسنده , , K.C. and Lutz، نويسنده , , L. and Lee، نويسنده , , M.H. and Malinin، نويسنده , , Jennifer A. and Nam، نويسنده , , S. and Park، نويسنده , , I.H. and Park، نويسنده , , J.H and Seo، نويسنده , , E.S. and Walpole، نويسنده , , P. and Wu، نويسنده , , J. and Yang، نويسنده , , J. and Yoo، نويسنده , , J.H. and Yoon، نويسنده , , Y.S. and Zinn، نويسنده , , S.Y.، نويسنده ,
Abstract :
The Cosmic Ray Energetics and Mass (CREAM) balloon-borne experiment is designed for direct measurement of high-energy cosmic rays. The experimental goal is to measure single-element fluxes of all cosmic-ray nuclei from hydrogen to iron with energies up to the “knee”, or spectral index change near 10 15 eV , observed in the all-particle spectrum. The dual layer Silicon Charge Detector (SCD) was designed to provide precise charge measurements. Each SCD layer has an active area of 77.9 cm × 79.5 cm and consists of 156 silicon sensors mounted on 24 ladders. Each sensor contains a 4 × 4 array of single-sided DC type silicon pixels with an active area of 2.1 cm 2 . The detector was flown on the second CREAM flight (December 2005–January 2006) and recovered successfully. The SCD was refurbished for the third CREAM flight and tested with high-energy electron and hadron beams at CERN. This paper reports on the performance of the SCD during the beam test.
