Title :
Beam dump for high current electron beam at JNC
Author :
Takei, Hayanori ; Takeda, Yasushi
Author_Institution :
Japan Nucl. Cycle Dev. Inst., Ibaraki, Japan
Abstract :
A high current electron beam is required for transmuting fission products using gamma-ray. Elemental technology for a linac that generates a high current beam in an efficient and stable manner is being developed at the Japan Nuclear Cycle development institute (JNC). A beam dump for the high current, low energy electron beam (20 mA, 10 MeV) from this accelerator has been constructed and tested at JNC. A ring and disk (RD) structure was adopted to absorb the beam safely and to analyze the beam condition in real-time. The thermal and stress analysis showed that a 200 kW electron beam could be securely stopped. The performance of the beam dump was evaluated using a beam of 7.0 MeV and an average current of 0.84 mA. The measured results showed that the electrons transported from the accelerator were completely absorbed. In addition, the beam dump was found to be capable to monitor the beam profile directly from the temperature distributions of the rings
Keywords :
accelerator-based transmutation; beam handling equipment; beam handling techniques; electron accelerators; electron beams; energy loss of particles; linear accelerators; stress analysis; temperature distribution; 10 MeV; 20 mA; beam dump; beam profile monitoring; beam transport system; fission products transmutation; high current electron beam; linac; ring and disk structure; ring temperature distributions; stress analysis; thermal analysis; Electron accelerators; Electron beams; Life estimation; Linear particle accelerator; Monitoring; Nuclear power generation; Particle beams; Temperature distribution; Testing; Thermal stresses;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
Print_ISBN :
0-7803-6503-8
DOI :
10.1109/NSSMIC.2000.949441
