1. Collection device for 8 Li and 8 B Semen Mitrofanov Marc Loiselet Thierry Delbar Université catholique de Louvain Centre de Recherches du Cyclotron Louvain-la-Neuve The first annual meeting of EUROν 2009 March 26 Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research Dubna

2. For what we will do it In the framework of the EUROnu project, the Cyclotron Research Centre is involved in a working group WP4 which studies the possibility to produce intense neutrino beams by the so called "beta-beams". Within the collaboration, the nuclei 8 Li (T1/2= 838 ms, ß- emitter) and 8 B (T1/2= 770 ms, ß+ emitter) have been selected for the beta-beams. The aim of this work is to design, construct and on-line tests of a collection device for 8 Li and 8 B. The first annual meeting of EUROν 2009 March 26

3. How we will do it (target R&D) The first annual meeting of EUROν 2009 March 26 First of all before collect you should produce 8 Li and 8 B, for this we plan to use 7 Li(d,p) 8 Li and 6 Li( 3 He,n) 8 B reactions using low energy and low intensity ~ 1nA beams of 6 Li(4-15 MeV) and 7 Li(10-25 MeV) hitting the deuteron or 3 He target.

4. How we will do it (catcher R&D) The first annual meeting of EUROν 2009 March 26 Then we should catch 8 Li: there are several candidates for catcher material: Tantalum, Molybdenum, Tungsten (wolfram) or Carbon. Preliminary the catcher is the set of thin foil (ISOLDE technique) Catcher geometry (in future) should provide transit of the primary beam (is it important for us – we will see) = toroidal geometry. Emission angle for 8 Li is about 11°

5. How we will do it (extraction and ionization ) Extraction of 8 Li and 8 B – high temperature – ohmic heating up to 2000°C (the best temperature should be estimated) Effusion + hv potential Ionization – or surface ionization source(hot effusion pipe) or ECR one Concerning 8 B it is not easy to predict the collection way of it but very preliminary it could be 8 BF 3 molecule production: 8 B+AlF 3 => 8 BF 3 it is proposal which should be carefully studied. The first annual meeting of EUROν 2009 March 26

6. How we will do it ( 8 Li and 8 B monitoring) The first annual meeting of EUROν 2009 March 26 How to detect the β-emitter ? scintillation counter scintillator coupled with photo-electron multiplier (FEM).

7. Start point – March’09 Prototype design study – June’09 Prototype technical drawings – July’09 Workshop manufacture – September’09 First off-line test – October’09 First beam runs – November÷December’09 – several two days runs Full-time beam tests - January÷February’10 Stage progress report – spring’10 End of the summer’10 - we hope we will finished with 8 Li. When we will do it (time schedule - 8 Li) The first annual meeting of EUROν 2009 March 26

8. When we will do it (time schedule - 8 B) The first annual meeting of EUROν 2009 March 26 Terra Incognita Here be dragons We have 1 years to discover how to produce 8 B beam of necessary intensity and 1.5 year to develop the production technique

9. Collection device for 8 Li and 8 B Thank You for Your attention Semen Mitrofanov Marc Loiselet Thierry Delbar The first annual meeting of EUROν 2009 March 26