Future R&D: beta-beam Mats Lindroos Mats Lindroos

Test of target prototypes at e.g. TRIUMF (ISAC facility). Production Test of target prototypes at e.g. TRIUMF (ISAC facility). Prototyping of a ring with ionization cooling for production of beta-beam isotopes. Mats Lindroos

Production ring with ionization cooling Mats Lindroos

6He production from 9Be(n,a) Converter technology: (J. Nolen, NPA 701 (2002) 312c) Converter technology preferred to direct irradiation (heat transfer and efficient cooling allows higher power compared to insulating BeO). 6He production rate is ~2x1013 ions/s (dc) for ~200 kW on target. Mats Lindroos

ISAC at TRIUMF: First high power ISOL facility! Mats Lindroos

Ionization and Bunching Test of all concepts for efficient ionization and bunching. Mats Lindroos

60 GHz « ECR Duoplasmatron » for gaseous RIB 2.0 – 3.0 T pulsed coils or SC coils Very high density magnetized plasma ne ~ 1014 cm-3 Small plasma chamber F ~ 20 mm / L ~ 5 cm Target Arbitrary distance if gas Rapid pulsed valve ? 1-3 mm 100 KV extraction UHF window or « glass » chamber (?) 20 – 100 µs 20 – 200 mA 1012 per bunch with high efficiency 60-90 GHz / 10-100 KW 10 –200 µs /  = 6-3 mm optical axial coupling optical radial (or axial) coupling (if gas only) P.Sortais et al. Mats Lindroos

(minimize charge exchange) Source scheme 5 T 28 GHz + 37 GHz (15 kW) 2.5 T + 20 kV large plasma chamber multi electrode system cryogenic trap target efficient pumping (minimize charge exchange) D. Hitz, CEA Mats Lindroos

Magnets several central coils for a good confinement nearby injection side and worse confinement at extraction side hexapolar radial field injection side extraction side 2 to 4 central coils Mats Lindroos

Design of accumulation ring Mats Lindroos

Accumulation at 400 MeV/u T1/2=1.67 s T1/2=17 s T1/2=0.67 s Mats Lindroos

The annual rate The annual rate at the EURISOL beta-beam facility is a factor of two below the annual rate assumed in most calculation Is it possible to re-gain this missing factor of two within the present base-line? Mats Lindroos

High gamma beta-beam Gamma Rigidity [Tm] Ring length T=5 T f=0.36 Dipole Field rho=300 m Length=6885m 100 938 4916 3.1 150 1404 6421 4.7 200 1867 7917 6.2 350 3277 12474 10.9 500 4678 17000 15.6 New SPS Civil engineering Magnet R&D Mats Lindroos

Summary Project Subjects Cost Other communities Production Production ring Target tests 5-15 MEuro 10-30 FTE Nuclear Astrophysics, Hadron therpay Ionization and bunching 60 GHz ECR (2 types) BNL EBIS? 5-10 MEuro 5-10 FTE Nuclear physics Machine studies HI acceleration Accumulation Higher gamma beta-beam Manpower Heavy ion physics, Nuclear physics Mats Lindroos

Conclusions For the proposal: For the beta-beam: Decide on a strategy for EU proposals for neutrino beams Appoint a writing group(s) and set up a schedule for the proposal(s) Present the proposal(s) for ESGARD For the beta-beam: We need to enlarge the community For a fair comparison with neutrino factories we need to study the limits of the concept starting at “study 1”. Mats Lindroos