WEPP38
KIRAMS, Seoul, Republic of Korea
KIRAMS/KHIMA, Seoul, Republic of Korea
Our research team is developing and constructing a high-energy ion beam irradiation device capable of ultra-high dose rates for biomedical research in connection with the main accelerator of RAON (Rare isotope accelerator complex for ON-line experiments). In this ion beam irradiation line, an x, y scanner will be installed in the active scanning type research beam delivery line. In order to measure the beam current, profile, and position before and after scanning, it is necessary to develop a system that can monitor the ultra-high dose rate ion beam in real time. The objective of this study is to develop and verify a data acquisition system that can measure the position and intensity of a flash ion beam in real time. To measure the accumulated detector current and beam profile using a charge integrator, output terminals of 128 channels for X and Y were fabricated. The detector current amount of each 128 channels was measured in units of 100 us for a pre-programmed time, and the beam intensity was set to store negative charge in the data memory inside the FPGA every 30 us. Also, center, σ, and sum values can be calculated based on the output of 128 channels for each x and y axis. In order to evaluate the usefulness of the manufactured DAQ, the measurement response of the intensity charge integrator, noise according to the gain setting, response, and the measured value of the strip charge integrator according to the gain setting were tested, and it was confirmed that it is suitable for monitoring the ultra-high dose rate ion beam. It is expected that the DAQ system manufactured in this study can be used not only for the RAON ion beam currently under construction, but also for the flash electron beam accelerator. In the future, it will be conduct the test verification with a two-dimensional array type ion chamber in flash radiation.
