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Activation calculations for the target of a spallation ultra-cold neutron source at PSI

Wohlmuther, Michael ; Züllig, Jan

In: Radiation Protection Dosimetry, 2005, vol. 116, no. 1-4, p. 280-283

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    Titel
    • Activation calculations for the target of a spallation ultra-cold neutron source at PSI
    Autor
    • Wohlmuther, Michael. Paul-Scherrer Institut, CH-5232 Villigen PSI, Switzerland
    • Züllig, Jan. Paul-Scherrer Institut, CH-5232 Villigen PSI, Switzerland
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Radiation Protection Dosimetry, 2005, vol. 116, no. 1-4, p. 280-283. Oxford University Press
    Andere elektronische Ausgabe
    Klassifikation
    • Gesundheit
    OAI-PMH-ID
    • oai:doc.rero.ch:298067
    Summary
    A spallation ultra-cold neutron source—UCN source—is scheduled to start operation at PSI in 2006 using up to 2 mA 590 MeV protons from the ring cyclotron. It will be operated in a pulsed mode with an average current of 20 μA. For safe maintenance, during operation as well as handling, transport and storage of the UCN target assembly after its lifespan, detailed knowledge about the activation induced by the impinging protons and secondary radiation fields is required. The Monte Carlo transport code MCNPX was coupled with the European Activation System—EASY—to calculate the residual nuclide production in the UCN target assembly. The nuclide inventory is finally used to design the shielded exchange flask that is needed to safely remove and transport the UCN target assembly after its lifespan to a hotcell for dismantling