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Beam dump for high current electron beam at JNC

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2 Author(s)
Takei, H. ; Japan Nucl. Cycle Dev. Inst., Ibaraki, Japan ; Takeda, Y.

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

Published in:

Nuclear Science Symposium Conference Record, 2000 IEEE  (Volume:3 )

Date of Conference:

2000