Development of data acquisition system for calet on the ISS

We have proposed a plan of CALET (CALorimetric Electron Telescope) to Japan Aerospace Exploration Agency (JAXA) to make observations of high energy cosmic rays, electrons, gamma-rays, and nuclei, on the International Space Station (ISS). It has been approved as one of phase-A projects starting in FY2007. The calorimeter (CAL) which is a main instrument of CALET consists of an imaging calorimeter (IMC) and a total absorption calorimeter (TASC). The CAL also has a silicon array (SIA) over the IMC and an anticoincidence detector (ADC) which covers the whole of detector. We will have a preliminary report of the data acquisition system of CALET on the ISS in order to carry out simultaneous observations of electrons, gamma-rays, and nuclein various energy regions.