Third flight of the CREAM instrument

Abstract—The,balloon-borne,Cosmic,Ray,Energetics And Mass (CREAM) experiment,investigates high,energy,cosmic rays (CRs) from,10, eV over,the elemental,range from,protons,to iron. CREAM extends,direct measurements of cosmic-ray composition,to energies where,ground-based,air shower detections are possible, thereby providing calibration for indirect measurements.,The precise measurement,of CRs in this energy,range allows also to study the production,(injection and acceleration) and,propagation,processes,in the Galaxy. A third flight of » 29days was,accomplished,in the Antarctic Summer 07/08, resulting in an overall accumulation of almost 100 days of exposure,for the CREAM payload. Elemental spectra of cosmic ray particles for 1 · Z · 26 were,measured,at the top of atmosphere with excellent charge and energy resolution, assured respectively by a Silicon Charge Detector (SCD) and a Cherenkov Imager (CherCam) for the charge,and,a tungsten-scintillator fiber ionisation calorimeter,for the energy,measurements.,The instrument,performance,during,this flight and,results from,the on-going data analysis, particulary for the CherCam detector for which it was the first flight, are presented.