Status of the EURISOL Design Study and Plans for FP7 Peter Butler University of Liverpool

TABLE 1). Participants in EURISOL Design Study ParticipantCountryParticipantCountry GANIL (coordinator) FranceInst. Physics VilniusLithuania CNRS/IN2P3FranceWarsaw UniversityPoland INFNItalyInst. Phys. BratislavaSlovakia CERNEuropeU. LiverpoolUnited Kingdom U. C. LouvainBelgiumGSI DarmstadtGermany CEAFranceU. SantiagoSpain NIPNERomaniaCCLRC DaresburyUnited Kingdom U. JyväskyläFinlandPaul Scherrer InstituteSwitzerland L.M.U. München GermanyInst. Phys. LatviaLatvia FZ JülichGermanyStockholm. U. MSLSweden 20 Participants

Topical areas and tasks of the EURISOL Design Study Topical AreaTasksLead Institution Management GANIL AcceleratorsDriver accelerator Post Accelerator Superconducting cavity prototyping INFN GANIL IN2P3 TargetsLiquid Hg Converter Direct targets High power fission target CERN INFN Physics, beams and safetySafety and radioprotection Beam Preparation Beam Intensities Physics and Instrumentation CEA U. Jyväskylä GSI U. Liverpool Beta BeamsBeta Beam Conceptual Design StudyCERN 12 Tasks

The EURISOL Road Map Vigorous scientific exploitation of current ISOL facilities : EXCYT, Louvain-la-Neuve, REX- ISOLDE, SPIRAL Construction of intermediate generation facilities: SPIRAL2, HIE-ISOLDE Design and prototyping of the most specific and challenging parts of EURISOL in the framework of the Design Study EURISOL-DS.

Ion sources 1 GeV/q H-, H+, 3 He++ >200 MeV/q D+, A/q=2 Charge breeder Low- resolution mass-selector UC x target 1+ ion source n-generator MeV/u (for 132 Sn) To low-energy areas Secondary fragmentation target 4-MW target station High-resolution mass-selector Bunching RFQ To medium-energy experimental areas H- H+, D+, 3 He MeV/u2-20 MeV/u To high-energy experimental areas RFQs Charge selector 100-kW direct target station Schematic Layout for EURISOL facility

The Main Challenges Design a 5MW; 1GeV proton driver with additional capability of 200 AMeV deuterons and A/Q=2 Heavy Ions; build and test prototypes of the cavities. Design a liquid Hg converter which will accept 5 MW of beam power. Design a UCx target which will make the most efficient use of the neutrons produced. Evaluate the safety constraints of the above set up. Design an efficient multi-user beam distribution system. Design a superconducting HI LINAC capable of accelerating 132 Sn up to 150 AMeV Investigate technologies for the instrumentation of the future Provide a conceptual study for a beta-beam neutrino facility.

Recent Management Accomplishments Submission of Second Annual Report on March 15. Only minor comments from EU. Successful Mid-Term Review on April 24 with Project Officer Christian Kurrer Spin off of the EURISOL user group; chaired by Angela Bonnacorso Organization of joint EURISOL-EURONS town meeting in Helsinki; Sept Start of Site Study chaired by Alan Shotter

DateTimeEvent Mon 17 All DayEURISOL-EURONS Town Meeting Talks Tue 18All DayEURISOL-EURONS Town Meeting Talks Early evening Poster Session & Aperitifs EveningTown Meeting Dinner Wed 19 MorningNews from NuPECC Future Activities in Nuclear Structure Physics in Europe AfternoonFuture Activities in Nuclear Structure Physics in Europe Thu 20MorningEURONS PCC MeetingEURISOL IAP MeetingEURISOL Task Meetings AfternoonEURISOL Coordination Board Meeting Fri 21MorningEURISOL Management Board Meeting EURISOL-EURONS town meeting, Helsinki, Sept

Reference MMW Target Station Hg converter and secondary fission targets Hg loop with window 8 UCX targets 40x6x3 cm Problems : Diffusion-Effusion Time Ion Sources Beam Hg flow UC fission target Ion source containment BeO reflector window CERN - INFN

Baseline Neutron converter Optimized ANSYS CFD analyses of optimized liquid mercury neutron converter of SNS (neutron spallation source) type The top view shows the converter with mercury flow guides to improve window cooling and avoid backflow in the converter The middle view shows the temperature distribution in the window which is well below thresholds for irradiated material The bottom view shows the temperature distribution of the circulating mercury which is well below the boiling point of mercury CERN

Windowless « curtain » converter IPUL – CERN - PSI Beam Hg Lamina flow of Hg

MAFF type solution for UC targets Cyril Kharoua, Yacine Kadi and task 2 Fission Target Tube Hg Proton to Neutron converter Hg inlet Hg outlet CERN - MUNICH

Driver: New baseline scheme with extended capabilities 2 injection lines for H,D, He and A/q=2 ions magnetic stripping at 1 GeV of up to 100 kW of the H - beam to H 0 (spilled beam intensity controlled by adjusting B) beam splitting by bending of H - with a magnetic dipole stripping of H 0 to H + by means of a stripper foil H - to MMW target and H + to 100kW targets H-,D- H+,D+, 3 He ++ RFQ 176 MHz HWR 176 MHz 3-SPOKE 352 MHz Elliptical 704 MHz 4 MW H- 100 kW H+, 3 He MeV/u 60 MeV/q 140 MeV/q 1 GeV/q B stripper foil stripper >200 MeV/q D, A/q=2 =0.047 =0.03 =0.09 =0.15 =0.65 = INFN

EURISOL Physics

EURISOL in FP7 Baseline Plan: Lobby for EURISOL to be on ESFRI list in 2009 and apply for preparatory construction phase at next call in Question: Is this approach still valid when taking into account the delays in the construction of SPIRAL2 ? We envisage proposing a continuation of the DS supported by the funding agencies in the framework of NUPNET In order to continue developing the EURISOL concept: LOIs for EURISOL-NET and JRA on ISOL targets in FP7 I3.

EURISOL-NET 24 Participants including all the main DS participants to allow the European laboratories that can conceivably host EURISOL to network with each other, with the funding agencies via NUPNET, and with the user community; to encourage the exchange of know-how on technical & scientific developments in European ISOL facilities (Louvain-la-Neuve, REX-HIE-ISOLDE, SPIRAL- SPIRAL2 and EXCYT); to support the EURISOL User Group and to continuously develop the scientific case for EURISOL.

FINIS

OLD: Temperature distribution in MMW target Acceptable power densities in the Hg. Flow pattern not optimised; maximum temperature ~260 ºC. Acceptable maximum temperature in the beam window (~350 ºC). Large temperature gradient in the window, inducing mechanical stresses above the acceptance limits. Power density (W/cm 3 /MW of beam) PROBLEMS NOW SOLVED

New 1 GeV/q beam splitters magnetic stripping at 1 GeV of up to 100 kW of the H - beam to H 0 The main H- beam transport is not perturbed by the symmetric wiggler beam splitting by bending of H - with a magnetic dipole stripping of H 0 to H + by means of a stripper foil H - to target 1 and H + to target 2(3,4). The spilled beam intensity can be controlled by adjusting the field strength of the magnetic stripper.

= 0.03 = 0.78 Ion sources RFQ 176 MHz HWRs 176MHz Elliptical ISCL 704 MHz 1 GeV/q H-, H+, 3 He MeV/u 100 keV 60 MeV/q140 MeV/q >200 MeV/q D+, A/q=2 Charge breeder Low-resolution mass-selector UC x target 1+ ion source n-generator = = 0.14 = 0.27 = QWR ISCL 88 MHz 3 QWRs ISCL 88 MHz 8 HWRs ISCL 176 MHz Spoke ISCL 264 MHz MeV/u (for 132 Sn) To low-energy areas Secondary fragmentatio n target Schematic Layout for EURISOL facility One of several target stations = spoke ISCL 325 MHz High- resolution mass-selector Bunching RFQ To medium-energy experimental areas = 0.65 Elliptical ISCL 704 MHz = 0.09, = 0.15 H- H+, D+, 3 He MeV/u MeV/u To high-energy experimental areas RFQs Charge selector