报告摘要：

ATIC and PAMELA have reported the anomalies in high energy electron and positron spectra. It has been suggested that this may come from nearby source or dark matter annihilation. Here we describe a new space experiment, TANSUO, optimized to provide direct cosmic ray electron and gamma-ray measurement in space at energies from 10 GeV to 10 TeV with high energy resolution and large acceptance. TANSUO will feature a deep BGO calorimeter to follow the details of shower development and a neutron detector to enhance discrimination between electron and hadron. Details of TANSUO will be discussed along with its expected performance and flight expectations.