On-Orbit Pile-Up Detection and Digital Pulse Shape Measurement Results in the Radiation Telescope

We have developed a radiation environment monitor called the Technical Data Acquisition Equipment (TEDA) installed in the RAPid Innovative payload demonstration Satellite 1 (RAPIS-1) which was launched on January 18, 2019. The TEDA measured the energy spectra of electrons, protons, and He ions. In addition to the functions of a conventional sensor, we added a fast digital sampling function to the TEDA. The operational verification in orbit was successful, and the pile-up waveform signal was acquired for the first time at The Japan Aerospace Exploration Agency (JAXA). The TEDA also obtained data showing that pile-up detection also worked properly.