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 - Miyawaki, N. AU - Fukuda, M. AU - Ishioka, N.S. AU - Kashiwagi, H. AU - Kurashima, S. AU - Watanabe, S. ED - Zhang, Tianjue ED - Schaa, Volker R.W. ED - An, Shizhong ED - Kiselev, Daniela ED - Liu, Yuntao ED - Li, Pengzhan TI - Experimental Study of Beam Energy Control at the TIARA AVF 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 - The TIARA AVF cyclotron provides a He beam for production of At-211 as one of many beam applications. The production rate of At-211 increases with the energy of the He beam, but contamination of Po-210 produced by radioactive decay of At-210, which is generated by the energy of above 29 MeV, must be prevented for medical applications. Therefore, the energy of the He beam must be precisely measured and controlled. A time-of-flight beam energy monitor in the straight beamline from the cyclotron was installed to measure the beam energy in real time. The beam energy was arbitrarily controlled within a range of about 1% by adjusting the cyclotron magnetic field and accelerating voltage, which are the possible causes of the beam energy change. Using this control, we investigated the rate of formation of At-211 and At-210 as the beam energy was varied. As a result, we confirmed the energy generating At-210 and both production rates increased with the energy of the He beam. PB - JACoW Publishing CP - Geneva, Switzerland SP - 83 EP - 86 KW - cyclotron KW - controls KW - experiment KW - target KW - extraction DA - 2023/10 PY - 2023 SN - 2673-5482 SN - 978-3-95450-212-7 DO - doi:10.18429/JACoW-CYCLOTRONS2022-MOPO013 UR - https://jacow.org/cyclotrons2022/papers/mopo013.pdf ER -