JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Besana, M.I. AU - Hohmann, E. AU - Sapinski, M. AU - Snuverink, J. AU - Werthmüller, D. ED - Zhang, Tianjue ED - Schaa, Volker R.W. ED - An, Shizhong ED - Kiselev, Daniela ED - Liu, Yuntao ED - Li, Pengzhan TI - Investigation of Long Radial Probe Activation in the PSI Main Ring Cyclotron J2 - Proc. of CYCLOTRONS2022, Beijing, China, 05-09 December 2022 CY - Beijing, China T2 - International Conference on Cyclotrons and their Applications T3 - 23 LA - english AB - During an inspection of a new Long Radial Probe, inserted into the Ring cyclotron only a month earlier, an activation hot spot has been identified. The nature of this hot spot has been investigated by performing measurements of the residual activation using shielded Al₂O₃:C dosimeters, 5 mm in diameter, and a portable gamma spectrometer. Monte Carlo simulations of the probe activation with various proton energies have been performed. Results show that most of the activation comes from relatively fast decaying radionuclides and therefore the residual dose drops sufficiently during the shutdown to allow for maintenance and upgrade works. Comparing the abundances of various radionuclides estimated from measured gamma spectra with simulations at various proton energies we conclude that the most probable loss mechanism is scattering of the protons on the upstream collimator. PB - JACoW Publishing CP - Geneva, Switzerland SP - 163 EP - 166 KW - proton KW - simulation KW - cyclotron KW - radiation KW - detector DA - 2023/10 PY - 2023 SN - 2673-5482 SN - 978-3-95450-212-7 DO - doi:10.18429/JACoW-CYCLOTRONS2022-WEAO05 UR - https://jacow.org/cyclotrons2022/papers/weao05.pdf ER -