EURONS Town Meeting 2008
September 17 - 19, 2008 -
Information

Title:	Dr.
Family Name:	Barbui
First Name:	Marina
Gender:	female
E-Mail:	marina.barbuilnl.infn.it
Affiliation for Badge:	INFN-LNL, Legnaro
Institute:
Address (Street):	viale dell'Universita', 2
Postal Code, City:	35020, Legnaro (PD)
Country:	Italy
Phone:	+390498068623
Fax:
Young researcher with contribution:	Yes
Arrival Date:	September 17
Departure Date:	September 19
Author(s):	M.Barbui, J.Bermudez, O.Alyakrinskiy, L.Tecchio
Institute(s):	INFN-Laboratori Nazionali di Legnaro
Title:	Study the fission target for EURISOL-DS
Abstract:	A detailed study of a new concept fission target for EURISOL-DS will be presented. The production of exotic species in the EURISOL Multi-MW target is a two steps process. A proton beam (4 mA intensity, 1 GeV energy) strike a thick Mercury target (the converter) producing the neutrons used to fission the Uranium target. The spectrum of the neutrons produced by the Mercury target and going to the fission target was studied in detail by FLUKA Monte Carlo simulations. In order to take advantage of the large number of low energy neutrons, a 235U enriched uranium carbide material, containing only 15g of 235U is used in the new design to obtain a fission rate of 10^14-10^15 fissions/s. The Monte Carlo code FLUKA was also used to estimate the in-target fissions yield. The moderator, the reflectors, the shields, as well as target geometry and materials were optimized in order to maximize the fission rate. The power deposition in all the elements of the target was also calculated. A specific thermal analysis was performed using ANSYS in order to study the constrains related to the materials used in the target assembly, the target maintenance, the target cooling, and the operating conditions. The target release properties were studied using the Monte Carlo code RIBO (Radioactive ion beam optimizer). A further optimization of the target geometry was performed in order to maximize the total released fraction for some short-lived isotopes. A 700g high-density UC target was recently tested at PNPI (Russia) using a direct 1 GeV proton beam. The preliminary results will be presented

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