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Simulation Status of the Top and Bottom Counting Detectors for the ISS-CREAM Experiment

S. Kang, Y. Amare, T. Anderson, D. Angelaszek, N. Anthony, K. Cheryian, G. H. Choi, M. Copley, S. Coutu, L. Derome, L. Eraud, L. Hagenau, J. H. Han, H. G. Huh, Y. S. Hwang, H. J. Hyun, S. Im, H.B. Jeon, J. A. Jeon, S. Jeong, H. J. Kim, K. C. Kim, M. H. Kim, H. Y. Lee, J. Lee, M. H. Lee, J.F. Liang, J. T. Link, L. Lu, L. Lutz, A. Mechaca Rocha, T. Mernik, J. W. Mitchell, S. I. Mognet, S. Morton, M. Nester, S. Nutter, O. Ofoha, H. Park, I.H. Park, J.M. Park, N. Picot Clemente, R. Quinn, E.S. Seo, J.R. Smith, P. Walpole, R.P. Weinmann, J. Wu, Y.S. Yoon

in 35th International Cosmic Ray Conference

Contribution: pdf


The Cosmic-Ray Energetics And Mass (CREAM) instrument for the International Space Station (ISS) is a detector for studying the origin, acceleration and propagation mechanism of high-energy cosmic rays. The ISS-CREAM instrument is scheduled to launch in 2017 to the ISS. The Top and Bottom Counting Detectors (TCD/BCD) are designed for studying electron and gamma-ray physics. The TCD/BCD are composed of a plastic scintillator and an array of photodiodes The active detection areas of the TCD/BCD are 500 $\times$ 500 mm$^2$ and 600 $\times$ 600 mm$^2$, respectively. The TCD/BCD were completed in 2015 and passed the environmental tests for safety in a space environment. After finishing these tests, the TCD/BCD were integrated with the payload. The TCD is located between the carbon target of the ISS-CREAM instrument and the calorimeter, and the BCD is located below the calorimeter. The TCD/BCD can distinguish between electrons and protons by using the different shapes between electromagnetic and hadronic showers in the high-energy region. We study the TCD/BCD performance in various energy ranges by using GEANT3 simulation data. Here, we present the status of the electron and proton separation study with the TCD/BCD simulation.