Mechanical design of the gamma blockers for the high-energy beam transport region of the European Spallation Source

Author:

Wojciechowski Marcin1ORCID,Szymczyk Karol1ORCID,Wronka Sławomir1ORCID

Affiliation:

1. National Centre for Nuclear Research Andrzeja Sołtana 7 St ., Otwock-Świerk , Poland

Abstract

Abstract The European Spallation Source (ESS) is a collaboration of 13 European countries to build the world’s most powerful neutron source for research. The project, situated in the south of Sweden, is approaching the end of the construction phase, and the first scientific results are planned for 2023. This paper gives an overview of mechanical design of the gamma blockers (GBs) in the accelerator to target (A2T) and dump line (DmpL) sections. The presence of GBs in the beam line should limit the gamma radiation emitted from the activated tungsten target and beam dump to allow the safe access of the staff to the machine. The presented design allows for efficient operation and the same shutting time independently of the vacuum status.

Publisher

Walter de Gruyter GmbH

Subject

Waste Management and Disposal,Condensed Matter Physics,Safety, Risk, Reliability and Quality,Instrumentation,Nuclear Energy and Engineering,Nuclear and High Energy Physics

Reference9 articles.

1. European Spallation Source. (2020). European Spallation Source. Retrieved May 2020, from https://europeanspallationsource.se/about.

2. Lee, Y., Eshraqi, M., Ghatnekar Nilsson, S., Levinsen, Y. I., Miyamoto, R., Molloy, S., Möller, M., Olsson, A., Shea, T. J., Thomas, C. A., & Wilborgsson, M. (2017). Working concept of 12.5 kW tuning dump at ESS. In Proceedings of the 8th International Particle Accelerator Conference (IPAC’17), Copenhagen, Denmark, 14–19 May 2017 (pp. 4591–4594). DOI: 10.18429/JACoW-IPAC2017-THPVA065.

3. Szymczyk, K., & Wronka, S. (2021). Gamma radiations calculations and gamma blocker design for the high energy beam transport region of the European Spallation Source. Nukleonika, 66(3), 99–102. DOI: 10.2478/nuka-2021-0014.

4. U. S. Department of Energy. (2010). Spallation neutron source final safety assessment document for proton facilities. Available from https://conference. sns.gov/event/28/attachments/65/83/FSAD_Proton_Facilities.12102010.pdf.

5. Santoro, R. T., Azmy, Y. Y., Barnes, J. M., Drischler, J. D., Johnson, J. O., Lillie, R. A., & McNeilly, G. S. (1999). Spallation neutron source radiation shielding issues. Oak Ridge National Laboratory. https://www. osti.gov/servlets/purl/10411-umo8JR/webviewable/.

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