OPTIMIZATION OF IRRADIATION PARAMETERS WITH LOW-ENERGY Kr, Xe, He IONS AT THE DC-60 ACCELERATOR

This paper presents the results of optimizing the operating modes for the formation of low-energy Kr, Xe, and He ion beams at the DC-60 accelerator complex intended for simulation of radiation damage in materials. The electron cyclotron resonance (ECR) source of highly charged ions was upgraded by replacing the DECRIS-3 source with the modernized DECRIS-3M. In addition, the operating parameters of the ECR ion source, beam injection, transport, and scanning systems were optimized. The charge-state distributions and beam intensities were investigated; optimal beam formation conditions were determined, and a uniform beam current density distribution over the target surface was achieved. The average beam current on the target increased from 45 to 77 μA for He2+ ions, from 13 to 26 μA for Kr15+ ions, and from 6 to 14 μA for Xe23+ ions, corresponding to increases by factors of 1.7, 2.0, and 2.3, respectively. The obtained results reduce the time required to achieve the desired ion fluence and improve the efficiency of radiation damage simulation experiments in materials.

1. Was G.S. Challenges to the use of ion irradiation for emulating reactor irradiation. Journal of Materials Research. 2015;30(9):1158–1182. https://doi.org/10.1557/jmr.2015.73

2. Taller S., Van Coevering G., Wirth B.D., Was G.S. Predicting structural material degradation in advanced nuclear reactors with ion irradiation. Scientific Reports. 2021;11:2949. https://doi.org/10.1038/s41598-021-82512-w

3. Temir A.M., Ivanov I.A., Koloberdin M.V., Sapar A.D., Mustafin D.A., Ungarbayev E.O., Bikhert E.V., Amanzholov B.S., Seitbayev A.S., Sembayev S.S., Tleubay I.K. Optimization of DC-60 accelerator parameters for irradiation of PETF films with heavy Kr ions. Bulletin of the National Nuclear Center of the Republic of Kazakhstan. 2025;(2):165–173.

4. Gikal B., Dmitriev S., Apel P., Bogomolov S., Borisov O., Buzmakov V., Gulbekyan G., Ivanenko I., Ivanov O., Itkis M., Kazarinov N., Kalagin I., Kolesov I., Papash A., Paschenko S., Tikhomirov A., Khabarov M. DC-60 heavy ion cyclotron complex: The first beams and project parameters. Instruments and Experimental Techniques. 2008;51(5):642–644. https://doi.org/10.1134/S1547477108070248

5. Ivanov I.A., Koloberdin M.V., Kurakhmedov A.E., Sapar A.D., Mustafin D.A., Temir A.M., Ungarbayev E.O., Bikhert E.V., Amanzholov B.S., Seitbayev A.S., Sembayev S.S., Tleubay I.K., Zdorovets M.V. Production of Kr15+ ions with an energy of 1.75 MeV/u at the heavy ion accelerator. Journal of the Nuclear Society of Kazakhstan. 2024;1(64):78–90.