Abstract
In the framework of the Beta Beams project, a molten fluoride target has been proposed for the production of the required 101318Ne/s. The production and extraction of such rates are predicted to be possible on a circulating molten salt with 160MeV proton beams at close to 1MW power. As a most important step to validate the concept, a prototype has been designed and investigated at CERN-ISOLDE using a static target unit. The target material consisted of a binary fluoride system, NaF:LiF (39:61mol.%), with melting point at 649°C. The production of Ne beams has been monitored as a function of the target temperature and proton beam intensity. The prototype development and the results of the first online tests with 1.4GeV proton beam are presented in this paper.
Highlights
IntroductionPure and intense radioactive ion beams (RIBs) are of great demand in numerous fields such as nuclear physics and astrophysics, weak interactions, solid state physics and life sciences
Pure and intense radioactive ion beams (RIBs) are of great demand in numerous fields such as nuclear physics and astrophysics, weak interactions, solid state physics and life sciences. These characteristics are relevant for the Beta Beams project [1] where the required rates exceed by several orders of magnitude the intensities presently delivered to nuclear physics and astrophysics communities
One of the main production mechanisms is the isotope separation online (ISOL) [2] method where a thick target is bombarded with accelerated high energy primary particles leading to the production of radioactive ions
Summary
Pure and intense radioactive ion beams (RIBs) are of great demand in numerous fields such as nuclear physics and astrophysics, weak interactions, solid state physics and life sciences. One of the main production mechanisms is the isotope separation online (ISOL) [2] method where a thick target is bombarded with accelerated high energy primary particles leading to the production of radioactive ions. The products of this process are extracted, ionized, electromagnetically mass-separated and distributed to the experimental apparatuses. Molten targets [3,4] can provide the highest intensities for isotopes of certain elements due to the high material density These targets suffer from long diffusion times which limit their use on the production of short-lived species. Mendonca et al / Nuclear Instruments and Methods in Physics Research B 329 (2014) 1–5
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