Shielding solutions at the SNS target/accelerator interface

Irina Popova; Franz Gallmeier

doi:10.1016/j.nima.2006.02.111

Shielding solutions at the SNS target/accelerator interface

Irina Popova, Franz Gallmeier

Neutronics Group

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

At the Spallation Neutron Source (SNS), a 1.4 MW proton beam at 1 GeV energy intercepts the liquid mercury target and sets free neutrons and a range of other particles. A fraction of the particles is scattered back into the last section of the accelerator tunnel, upstream from the target, and increases the already present radiation field caused by proton beam losses. The accelerator structures are exposed to high radiation fields limiting their lifetime and causing activation. Much higher activation is expected in the target and surrounding structural materials. These components become highly intense decay gamma sources and shine back into the accelerator tunnel even after beam termination. All these issues were investigated to support material selection, shielding design and maintenance planning.

Original language	English
Pages (from-to)	940-945
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	562
Issue number	2
DOIs	https://doi.org/10.1016/j.nima.2006.02.111
State	Published - Jun 23 2006

Funding

This work has been supported by the US Department of Energy (DOE) through the SNS Project. SNS is managed by UT-Batelle, LLC, under contract DE-AC05-00OR22725 for the US DOE.

Funders	Funder number
US DOE
US Department of Energy
UT-Batelle	DE-AC05-00OR22725
U.S. Department of Energy

Keywords

Accelerator
Radiation
Shielding

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10.1016/j.nima.2006.02.111

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AB - At the Spallation Neutron Source (SNS), a 1.4 MW proton beam at 1 GeV energy intercepts the liquid mercury target and sets free neutrons and a range of other particles. A fraction of the particles is scattered back into the last section of the accelerator tunnel, upstream from the target, and increases the already present radiation field caused by proton beam losses. The accelerator structures are exposed to high radiation fields limiting their lifetime and causing activation. Much higher activation is expected in the target and surrounding structural materials. These components become highly intense decay gamma sources and shine back into the accelerator tunnel even after beam termination. All these issues were investigated to support material selection, shielding design and maintenance planning.

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Shielding solutions at the SNS target/accelerator interface

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