Since the winter of 2002, the HIMAC facility at the National Institute of Radiological Sciences near Chiba Japan has conducted series of exposures to calibrate and intercompare radiation instruments designed for use in space as part of a newly initiated InterComparison for Cosmic-ray with Heavy Ion Beams At HIMAC (ICCHIBAN) project.
This project was conceived in 2000 following the recommendation of the 4th WRMISS (Workshop for Radiation Monitoring for International Space Station).
The exposures have been perfomed with well-characterized heavy ion beams; several 100 MeV/nucleon He to Xe. The properties of the incident beam-such as intensity, profile, charge, velocity and total energy have been characterized by several ground based detectors, including silicon detectors, CR-39 plastic nuclear track detectors, plastic scintillation counters and time of flights detectors. Once the response of each detector to heavy ion beams of known composition is measured, the space radiation measurement instruments can be calibrated and, ultimately, compared with one another.
The exposures in this project have been perfomed at not only HIMAC but also other accelerators (LLU-MC in Loma Linda Univ.,NASA Space Radiation Lab. in Brookheven National Lab., CERF in CERN and etc.) in the world.