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          Institute: MPI für Plasmaphysik     Collection: Articles, Books, Inbooks     Display Documents



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ID: 56313.0, MPI für Plasmaphysik / Articles, Books, Inbooks
Neutron field in the Wendelstein-7-X hall
Authors:Herrnegger, F.; Junker, J.; Weller, A.; Wobig, H.
Language:English
Research Context:22nd Symposium on Fusion Technology (SOFT 2002), Helsinki, 2002-09-09 to 2002-09-13
Date of Publication (YYYY-MM-DD):2003
Title of Journal:Fusion Engineering and Design
Journal Abbrev.:Fusion Eng. Des.
Volume:66-68
Start Page:849
End Page:853
Copyright:Copyright © 2003 Elsevier B.V. All rights reserved
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The (d,d)-reactions between the deuterons will produce neutrons with an average energy of 2.46 MeV which are shielded by the concrete wall of 180 cm thickness in case of the Wendelstein 7-X experimental device. The knowledge of the neutron field inside the hall is of special interest for the various diagnostic facilities including neutron diagnostics. The dependence of the neutron flux on the boron concentration as used for the concrete wall and on the thickness of the concrete wall was analyzed. In the interior region of the torus, the flux of fast neutrons (number of neutrons per MeV cm²) is two orders of magnitude higher than in the region close to the concrete wall. By doping the concrete walls with 700 ppm of boron the almost homogeneous flux of thermal neutrons is reduced by a factor of about 30 compared to the case of no boron-admixture.
Free Keywords:Stellarator; Helias reactor; Neutronics; Nuclear data; Monte Carlo transport
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Plasmaphysik/Stellarator Optimization (E3)
External Affiliations:Unlimited Computer Systems, Seeshaupterstrasse 15, D-82393, Iffeldorf, Germany
Identifiers:DOI:10.1016/S0920-3796(03)00364-8
URL:http://www.sciencedirect.com/science?_ob=MImg&_ima...
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