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EURISOL-Beta Beam Task: Planning and Overview

This document provides an overview of the planning and current status of the EURISOL-Beta Beam Task, including sub-tasks, milestones, participants, deliverables, and budget. It also introduces the concept of beta-beams, their aim, design flux, and their relationship with the EURISOL project and the FAIR project.

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EURISOL-Beta Beam Task: Planning and Overview

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  1. EURISOL and the Beta-Beam TaskStatus and Planning Michael Benedikt Mats Lindroos AB-Department, CERN EURISOL - Beta Beam Task

  2. Outline • EURISOL • Task organisation • Overview on beta-beam task • Sub-tasks • Work planning and goals by sub-tasks • Participants • Milestones • Deliverables and supporting documentation • Prospective hiring and budget • Meetings and task status EURISOL - Beta Beam Task

  3. Introduction to beta-beams • Beta-beam proposal by Piero Zucchelli • A novel concept for a neutrino factory: the beta-beam, Phys. Let. B, 532 (2002) 166-172. • AIM: production of a pure beam of electron neutrinos (or antineutrinos) through the beta decay of radioactive ions circulating in a high-energy (~100) storage ring. • The baseline scenario • Avoid anything that requires a “technology jump” which would cost time and money (and be risky) • Make maximum use of the existing infrastructure EURISOL - Beta Beam Task

  4. CERN 1st beta-beam “study/idea” • Two isotopes selected: • 18Ne10+, T1/2=1.67 seconds, 18Ne10+-> 18F9+ + e+ + n, Q-value=4433.4 keV • 6He2+, T1/2=0.8 seconds, 6He2+-> 6Li3+ + e- + n, Q-value=3507.8 keV • The neutrino beam at the experiment has the “time stamp” of the circulating beam in the decay ring. • The beam has to be concentrated in as few and as short bunches as possible to maximize the number of ions/nanosecond for background suppression. • Aim for a duty factor of 10-3 - 10-4 for the detector. EURISOL - Beta Beam Task

  5. Design Flux • The Design Study is aiming for: • A beta-beam facility that will run for 6 months each year or 107 seconds per year • An integrated flux of 10 1018 anti-neutrinos (6He) and 5 1018 neutrinos (18Ne) in ten years running at g=100 With an Ion production in the target to the ECR source: • 6He= 2 1013 atoms per second • 18Ne= 8 1011 atoms per second EURISOL - Beta Beam Task

  6. EURISOL DS • Future beta-beam R&D together with EURISOL project • Design Study in the 6th Framework Programme of the EU • The EURISOL Project • Design of an ISOL type (nuclear physics) facility. • Performance three orders of magnitude above todays facilities. • A first feasibility / conceptual design study was done within FP5. • Strong synergies with the beta-beam especially low-energy part: • Ion production (proton driver, high power targets). • Beam preparation (cleaning, ionization, bunching). • First stage acceleration (post accelerator ~100 MeV/u). • Radiation protection and safety issues. EURISOL - Beta Beam Task

  7. EURISOL FAIR: FAIR: High energy fragmentation: EURISOL high intense easy beam (e.g. 132Sn) + post-acceleration to GeV region in PS + IF or direct = A major step further towards more exotic nuclei • Unique Features: • ISOL method • MWATT targets • High energy fragmentation • Beta-beam FAIR: FAIR: FAIR: EURISOL - Beta Beam Task

  8. EURISOL EURISOL - Beta Beam Task

  9. EURISOL design study • Production of an engineering oriented design of the facility, in particular in relation to its most technologically advanced aspect (i.e., excluding the detailed design of standard elements of the infrastructure). • Technical Design Report for EURISOL. • Conceptual Design Report for Beta-Beam (first study). EURISOL - Beta Beam Task

  10. General EURISOL for the beta-beam • Target tasks: 100 kW and MW targets • CERN • Beam preparation: 60 GHz ECR source • IN2P3-LPSC • Heavy-ion accelerator: acceleration up to 100 MeV/u • GANIL • Physics: Low energy beta-beam • IN2P3-Orsay • And more… EURISOL - Beta Beam Task

  11. Overview on Beta-Beam task From exit of EURISOL post-accelerator (~100 MeV/u) to Decay Ring (~100 GeV/u). Experiment Proton Driver Linac Acceleration to final energy PS & SPS Ion production Direct/converter target & ion source SPS Beam preparation 60 GHz ECR pulsed Neutrino Source Decay Ring Decay ring Br = 1500 Tm B = 5 T C = 7000 m Lss = 2500 m 6He: g = 150 18Ne: g = 250 Ion acceleration Post-accelerator PS Acceleration to medium energy Bunching ring and RCS EURISOL - Beta Beam Task

  12. Sub-Tasks • Beta-beam task starts at exit of EURISOL post-accelerator. • Comprises design of complete accelerator chain up to decay ring. • Work is organized in four Sub-Tasks (ST): • ST 1: Parameter definition and evolution of the base line design. • ST 2: Design of low-energy ring(s). • ST 3: Ion acceleration in PS and SPS and new machine designs. • ST 4: Decay ring design EURISOL - Beta Beam Task

  13. ST 1 – Planning 02/05-01/06 • ST 1: Parameter definition and evolution of the base line design. • Participants (1.2 MY total): • Coordinating Institute: CERN (0.6 MY) • IN2P3 (0.1), Stockholm Univ.(0.1), CEA-Saclay (0.2), GSI (0.1), CCLRC RAL (0.1). • Work objectives: • Definition of main parameters and confirmation of base line design. • Coordination of accelerator sub tasks (ST 2, 3, 4). • Coordination with linked EURISOL tasks and outside contributors (TRIUMF). • Milestones: • 04/05: preliminary parameter list • 10/05: definitive parameter list. • Deliverables: • Report with parameter list for the beta-beam accelerator complex. EURISOL - Beta Beam Task

  14. ST 2 – Planning 02/05-01/06 • ST 2: Design of low energy rings(s). • Participants (1 MY total): • Coordinating Institute: IN2P3 (0.15 MY) • CERN (0.4), Stockholm Univ.(0.15), CEA-Saclay (0.3), TRIUMF • Work objectives: • Evaluation and choice of low-energy machines (RCS, FFAG, Cyclotron). • Optics design for low-energy rings • Milestones: • 10/05: choice of low-energy machine(s). • Supporting documentation: • Note on comparison of low-energy machine(s). • Note on preliminary optics design. EURISOL - Beta Beam Task

  15. ST 3 – Planning 02/05-01/06 • ST 3: Ion acceleration in PS and SPS and new machine designs. • Participants (2.85 MY total): • Coordinating Institutes: CERN (PS&SPS) (0.8 MY), GSI (new designs) (1.9 MY) • CCLRC RAL (0.15), TRIUMF • Work objectives: • Simulations of ion acceleration scenarios in PS & SPS (longitudinal & transverse). • Parameter definition for new machine to replace PS. • Optics design for new PS. • Milestones: • 10/05: decision on acceleration scheme for PS & SPS (harmonic number, etc.) • 10/05: definition of parameters for new PS • Supporting documentation: • Note on ion acceleration in PS and SPS and transverse/longitudinal limitations. • Note on parameter choice and preliminary optics design for new PS EURISOL - Beta Beam Task

  16. ST 4 – Planning 02/05-01/06 • ST 4: Decay ring design. • Participants (1.8 MY total): • Coordinating Institute: CEA-Saclay (1.5 MY) • CERN (0.3), TRIUMF • Work objectives: • Optics design of the decay ring. • Simulations for ion injection and stacking in the decay ring. • Milestones: • 10/05: freeze linear optics parameters for decay ring • 10/05: decision on feasibility of asymmetric bunch merging as stacking method • Deliverables: • Report on preliminary optics design for the decay ring. EURISOL - Beta Beam Task

  17. Task meetings and status • Foreseen Meetings • 1st Beta-beam task meeting: 14. April 2005, CERN • 2nd Beta-beam task meeting: 17. October 2005, Saclay • Several smaller “working meetings” as needed • Status of the beta-beam task • 2 task meetings during last year (CERN, RAL) • Work on all sub-tasks started, esp. decay ring design is advancing well • Next steps: • Confirmation of beam parameters at high energy with neutrino physicists. • Definition of low-energy side with other EURISOL tasks (beam preparation, post accelerator) EURISOL - Beta Beam Task

  18. Flux • Talk in nowg on Friday: • Gamma dependence of flux • Optimization schemes for accumulation of radioactive ions • Longer lived isotopes EURISOL - Beta Beam Task

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