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Title: The Radioactive Ion Beam project at VECC and the safety issues
Authors: Chakrabarti, A
Keywords: RIB
Radioactive ion beams
Issue Date: Nov-2012
Publisher: NISCAIR-CSIR, India
Abstract: The Radioactive Ion Beam (RIB) project aims at accelerating beta-unstable secondary beams of atomic nuclei produced by bombarding a target by primary beam such as protons and alpha-particles. A number of ion-sources and linear accelerators have already been built for this project, which involves construction of an Isotope Separator on Line (ISOL) type RIB facility. At present beams are accelerated up to about 415 keV/u using one RF Quadrupole linac and three IH Linacs. Finally, with the addition of a few more Linac modules beams would be accelerated to about 1.3 MeV/u. This energy is as such quite low, below the coulomb barrier except at low masses. Also since the RIBs are secondary beams, their intensity is often below 107 particles per second. Thus, lack of activity at the secondary target rather than activity is what throws challenges to the experimenters and designers of such a facility. The situation is, however, not so simple at the production target station, where the activity induced by primary beam would be very high especially for actinides targets. One often needs to design very special chambers with quick connect-disconnect features to remotely disengage and remove the active part of the target chamber into a heavily shielded box for transfer to a hot store. This paper gives an overview of the present status of VECC RIB facility. Safety issues related to this project would be discussed and steps already taken to ensure the same at the present stage of the facility, and those that are being planned to ensure safety for the facility in its final form would be discussed.
Page(s): 766-771
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.50(11) [November 2012]

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