Pv. Drumm et al., A COMPARISON OF RIST AND ISOLDE TANTALUM TARGETS AND GEOMETRIES USED ONLINE AT ISOLDE, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 126(1-4), 1997, pp. 121-124
A comparison is made of the performance of RIST and ISOLDE tantalum ta
rgets used on-line at the CERN-ISOLDE isotope separator. The data is t
aken from a combination of recent measurements st the CERN-PSB and fro
m the former ISOLDE facility at the CERN-SC. Developments in the targe
t geometry have been necessary for the RIST project which aims to desi
gn a target capable of dissipating the power developed by an 800 MeV,
100 mu A proton beam. These designs are being tested at the ISOLDE-PSB
facility and the initial results are reported in comparison with data
obtained from typical ISOLDE tantalum-foil targets. The study shows t
hat improvements in the release properties of a number of elements can
be made by a judicious choice of target matrix geometry. The target r
epresents a complex system where, in general, modelling alone involves
too many parameters to generate a reliable model of the target. From
this study, it is clear that further practical work, following simple
ideas such as those based on modifications of the target geometry, is
necessary in order to obtain progress in the optimisation of the targe
t design.