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Future R&D: beta-beam

Future R&D: beta-beam. Mats Lindroos. Production. Test of target prototypes at e.g. TRIUMF (ISAC facility). Prototyping of a ring with ionization cooling for production of beta-beam isotopes. Production ring with ionization cooling. 6 He production from 9 Be(n, a ).

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Future R&D: beta-beam

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

  2. 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

  3. Production ring with ionization cooling Mats Lindroos

  4. 6He production from 9Be(n,a) • 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. Converter technology: (J. Nolen, NPA 701 (2002) 312c) Mats Lindroos

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

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

  7. 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

  8. 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

  9. 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

  10. Accumulation • Design of accumulation ring Mats Lindroos

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

  12. 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

  13. High gamma beta-beam New SPS Civil engineering Magnet R&D Mats Lindroos

  14. Summary Mats Lindroos

  15. Conclusions • For the proposal: • 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

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