ISOLDE High-lights and Future Plans Maria J. G. Borge, CERN, PH-Dept ISOLDE is the CERN radioactive beam facility In operation since 45 years The largest selection of isotopes of any ISOL facility worldwide Provides low energy or post-accelerated beams Run by an international collaboration Open to users from around the world 2 A Few Facts ISOLDE at CERN 3 Facility LINAC2 PSB PS ISOLDE To be upgraded in intensity (2uA->6uA p to ISOLDE) and energy (1.4->2GeV) To be exchanged by LINAC4 ISOL elements 4 Isotope production via reactions of light beam with thick and heavy target PSB upgraded in intensity (2uA->6uA p to ISOLDE) and energy (1.4->2GeV) ISOTOPE production in ISOL method 5 Produced Nuclei 6 Over 20 target materials and ionizers, depending on beam of interest operated at high temperature U, Ta, Zr, Y, Ti, Si, 3 types of Ion-sources > 700 nuclides of over 70 chemical elements produced Target Reported by Thierry Stora ISOLDE physics topics Many beams Good beam purity and quality High intensity 7 Nuclear Physics Nuclear Decay Spectroscopy and Reactions Structure of Nuclei Exotic Decay Modes Atomic Physics Laser Spectroscopy and Direct Mass Measurements Radii, Moments, Nuclear Binding Energies Nuclear Astrophysics Dedicated Nuclear Decay/Reaction Studies Element Synthesis, Solar Processes f(N,Z) Fundamental Physics Direct Mass Measurements, Dedicated Decay Studies - WI CKM unitarity tests, search for b-n correlations, right-handed currents Applied Physics Implanted Radioactive Probes, Tailored Isotopes for Diagnosis and Therapy Condensed matter physics and Life sciences Physics & Users 8 User requirements: Higher energy for the post-accelerated beam More beams (intensity wise and different species) Better beams (High purity beams, low emittances, more flexibility in the beam parameters) => Need upgraded facility : HIE-ISOLDE Project Around 450 users (7% of CERNs total) 25 countries; 100 institutions 175 experiments (in 4 years) 90 active experiments in 2011 Physics interest: Nuclear structure from decay and reactions Nuclear gs properties via atomic techniques Nuclear astrophysics Fundamental interactions Solid-state physics Bio- and medical physics Experimental hall Target stations HRS & GPS Mass-sep. HRS ISCOOL RILIS REX-ISOLDE PS-Booster 1.4 GeV protons 310 13 ppp ISOLTRAP CRIS COLLAPS NICOLE MINIBALL and T-REX WITCH Travelling setups Post-accelerated beams 9 Collection points TAS Susanne Kreim Magdalena Kowalska Elisa Rapisarda COLLAPS Ne charge radii 10 Laser spectroscopy & Massses Geithner et al, PRL 101, (08) Marinova et al, PRC84, (11) Intrinsic density distributions of dominant proton FMD configurations WITCH Weak Interaction Trap for Charged particles -> fundamental studies Goal: determine correlation for 35 Ar with ( a/a) stat 0.5 % WITCH 12 M. Beck et al., Eur. Phys. J. A47 (2011) 45 M. Tandecki et al., NIM A629 (2011) 396 S. Van Gorp et al., NIM A638 (2011) 192 First high-statistics run in Nov 2011: under analysis PRESENT16 Nov 2012 June 2011 data -> energy spectrum of recoiling ions with a retardation spectrometer Use a Penning trap to create a small, cold ion bunch 35 Ar REX-ISOLDE 13 Total efficiency : % 1 + to A/Q = 3 4.5 Post-accelerated beams 14 MINIBALL Travelling setups First spin-polarized beam (8Li) produced with tilted foils after the REX linac (300 keV/u). REX separator and linac successfully tested with A/q=2 => important for TSR. Difficult 6 He beam through REX to Optical Time Projection Chamber (OTPC). d 21 Na(p,) 18 Ne to study 22 Mg states. 30 Mg(p,p) to study 31 Mg excited state by its Analogue Resonance Characterize 13 Be from analogue resonance sin 13 B populated by 12 Be(d,n) with MAYA REX-ISOLDE 15 d Experimental set-up: T-REX &MINIBALL beam MINIBALL 24 HPGe 6-fold segmented 1.3 MeV beam shown is GEANT4 Implementation of set-up Talk by Elisa Rapisarda! Near Future: HIE-ISOLDE project 17 Energy Upgrade: The HIE-ISOLDE project construction of the SC LINAC to upgrade the energy of the post- accelerated radioactive ion beams to 5.5 MeV/u in 2015 and 10 MeV/u by 2017 Intensity Upgrade: The design study for the intensity upgrade, also part of HIE-ISOLDE, started in 2011, and addresses the technical feasibility and cost estimate for operating the facility at 10 kW once LINAC4 and PS Booster are online. Approved Dec 2009 Offically started Jan 2010 Yacine Kadi project Leader Budget 40 M$ Tomorrow Yacine kadi Richard Catherall The ISOLDE Collaboration ISOLDE is run by a collaboration comprising 13 countries and CERN. Each country pays a annual fee of 60 KEuros. This budget is used to support experiments, buy common equipment and consumables, pay some personnel (visitors, secretary.) and contribute to upgrades (HIE-ISOLDE) Each county has a representative on the Isolde Collaboration Committee which meets three times a year. The chair is currently Dr Yorick Blumenfeld (France) Summary and outlook The Future of ISOLDE is bright. With nearly 50 year of operation ISOLDE remains as pioneering ISOL-installation both at the level of designing new devices and production of frontier Physics. ISOLDE experiments cover many techniques enabling to answer many physics questions. Synergies between the different experiment techniques hunting for isolating very pure beams has been lately very successful Complementarity is important! 19 Thank you for your attention 20 Coulomb excitation & Miniball 21 Observables: Transition energies and intensities Information: reduced transition matrix elements => Study collectivity and deformations Miniball setup: highly efficient gamma detectors and particle detector target REX- ISOLDE E improved kinematic corrections for reaction products + decreased detector dead-time as CW beam (REX and HIE-ISOLDE pulsed) Possibility to use extracted beam with excellent optical qualities Physics Cases discussed for the TSR 28 1.Half-life measurements of 7 Be in different atomic charge states 2.Capture reactions for astrophysical p-process 3.Nuclear astrophysics through transfer reactions 4.Nuclear structure through transfer reactions 5.Long-lived isomeric states 6.Atomic effects on nuclear half-lives 7.Di-electronic recombination on exotic nuclei 8.Atomic physics experiments 9.Neutrino physics 10.Laser spectroscopy experiments in the storage ring Nuclei production and selection 29 Targets Over 20 target materials and ionizers, depending on beam of interest U, Ta, Zr, Y, Ti, Si, Target material and transfer tube heated to 1500 2000 degrees Operated by robots due to radiation 30 Converter Target Standard Converter Target p+ Ionization Surface 31 Plasma Lasers Converter target 32 Going beyond the limits with the LIST Neutron-rich beams at ISOLDE are limited by the high isobaric contamination from Fr and Ra. The Laser Ion Source Trap can suppress those beams by up to a factor The first decay spectroscopy of 219 Po has been performed as well as hfs studies on Po. 33 D.Fink, Ph.D thesis U. of Mainz