Forschen für die Zukunft Bericht zu ISOLDE Report on ISOLDE Susanne Kreim 30. November 2012 1) ISOLDE – numbers and developments 2) Low-energy experiments 3) Post-accelerated beams and upgrades KHuK Jahrestagung Bad Honnef Exotische Kerne ISOLDE – German Contribution REX-ISOLDE U Bonn U Darmstadt U Köln LMU Müchen TU München U Darmstadt U Köln LMU München Class-A lab RILIS U Mainz U Münster U Darmstadt U Mainz Target/front-end REX WITCH MINIBALL COLLAPS ISOLTRAP CRIS GSI MPIK TU Dresden 2U Greifswald GSI MPIK U Mainz U Tübingen CONTROL ROOM Exotische Kerne ISOLDE Statistics - General ISOLDE Collaboration: 14 member states + CERN BMBF funding (~10% contribution to the ISOLDE Collaboration) German contribution to ISOLDE: 60 k€ / year German contribution to HIE-ISOLDE: 40 k€ / year > 60 publications / year (among them ~10 Phys. Rev. Lett.) http://isolde.web.cern.ch/ISOLDE/science/ISOLDE_Publication_list.php 3 Exotische Kerne ISOLDE Statistics - Physics 13 experiments out of 51 scheduled in 2012 have a spokesperson from a German institute Year Shifts requested Shifts scheduled Shifts delivered 2009 ~480 ~400 350 2010 ~500 ~400 340 2011 ~650 ~440 360 2012 830 540 Not counted yet ~ 80% reliability! 1 shift = 8h of protons on the target 4 RILIS = Resonance Ionization Laser Ion Source Upgraded in 2011 with solid-state Ti:Sa laser system Dual dye and Ti:Sa setup allowed for a record time of >2700 h RILIS ionized beam for ISOLDE users in 2012 Narrow band-width Ti:sapphire (NB-Ti:Sa) laser for in-source laser spectroscopy and isomer separation established data communication between RILIS and ISOLDE experiments Applied for laser spectroscopy of Au isotopes io n s ig n al ( a. u . ) Hochtechnologie für die Grundlagenforschung Dual RILIS Operation 2012 7.5 197 5.0 267.7 nm THG Ti:Sa broadband Au 2.5 0.0 2.0 THG Ti:Sa narrowband 1.5 1.0 0.5 0.0 5 -10 -5 0 5 10 relative frequency (GHz) 15 20 25 High-selective ion-beam production with Laser Ion Source & Trap (LIST) 1. ISOLDE Target: Production of exotic nuclei 2. RILIS: Element selective ionization 3. LIST: Full Isobar Suppression Selectivity Gain for 22Mg / 22Na ratio First successful LIST online run ! 205Fr 1. 2. 3. S = 2400 KUL Windmill Detector Atomkerne - Bausteine unserer Welt COLLAPS Harvest Proposals at COLLAPS: Data Taking, in Preparation, Just Completed Pr K, Ca, Mn Cd Cu, Ga, Zn Mg Be IS517 (Ch. Geppert, Mainz) IS497 (D. Yordanov, MPIK) IS439 (K. Flanagan, CERN) PLB 703 (2011) IS457 (B. Cheal, Manch.) PRC 84, 024303 (2011) IS519 (B. Cheal, Manch.) PRC 86, 034329 (2012) IS480 (K. Blaum, MPIK Heidelberg) PRL 108, 042504 (2012) IS449 (W. Nörtershäuser & Ch. Geppert, Mainz) PRL 108, 142501 (2012) 7 8 Standardmodell der Teilchenphysik WITCH: Weak Interaction Trap for Charged Particles S V Combination of Penning traps with MAC-E filter: - Production of a scattering free source - Measurement of recoil energy distribution after b-decay b-n angular correlation a Test of standard model complementary to high energy physics Best test case for WITCH 35Ar 99 Standardmodell der Teilchenphysik WITCH Online Runs 2011/2012 First data sets with 35Ar taken 2011 Found several imperfections of the WITCH system and worked on it Took data in 2012 with statistics for a precision of a few % precision for a of 35Ar Still had hints for ionization in the system Data analysis and further offline tests will reveal systematic effects 10 10 Kerne und Sterne 82Zn for Nuclear Structure and Astrophysics High-precision Penning-trap mass spectrometry with ISOLTRAP Its determination is important for modelling of the crust of neutron stars R. N. Wolf et al., PRL, submitted (2012) B Helps to pin down nuclear models to study the behavior of nuclei at the extremes of stability Multi-reflection time-of-flight mass separator (MR-TOF MS) at ISOLTRAP experiment plus detector as stand-alone system Particles travel up to 34km before ejection Direct time-of-flight mass measurements become possible, ex. 54Ca (ISOLDE yield 10/s) Excellent synergy between precision experiment and current theoretical developments (A. Schwenk, TU Darmstadt) 1000 counts / arb. units Die Grenzen der Stabilität von Kernen MR-TOF MS at ISOLTRAP 54 Cr 358 revolutions in the MR-ToF MS beam gate = 30 ms 16000 shots 100 54 Ti 54 10 Ca ? 1 6.3475 6.3480 6.3485 6.3490 time of flight / ms R. N. Wolf et al., Nucl. Instr. and Meth. A 686, 82-90 (2012), S. Kreim et al., INTC-P-317, IS 532 (2011) 6.3495 Shell stabilization in N=80 isotones? Post-accelerated beam from REX-ISOLDE Method: Coulomb excitation in inverse kinematics at the MINIBALL setup MINIBALL array of 8 3-fold segmented highpurity Germanium clusters Particle identification via double-sided Si detectors 40 Exp. data Our measurements N N - scaling extreme shell model 35 30 B(E2) [W.u.] Die Landkarte der Nuklide Systematics of B(E2) values in N=80 isotones: 25 shell stabilization 20 15 10 1g7/2 5 2d5/2 0 50 52 54 56 58 60 62 64 Proton number Z View at the opened target chamber: AG Pietralla measured B(E2;2+0+) values of 140Nd and 142Sm Trend of increasing B(E2) continuous beyond Z=58 within errors Observation of local suppression in collectivity at Z=58 New data provide evidence for “shell stabilization” mechanism introduced in PRL 96, 122501 (2006). 13 Die Entstehung der Elemente Coulomb Excitation of 123,128Cd @ Miniball IS524 123Cd: IS477 128Cd: B(E2)-value has to be extracted 14 Level scheme has to be sorted out Fundamentale Symmetrien Octupole Deformation in 224Ra 224Ra DSSD Particle detector 224Ra good candidate to look for CP-violating static electric dipole moment Mass number A 15 Instrumente der Hadronen- und Kernphysik Near Future: HIE-ISOLDE Project Energy Upgrade: The HIE-ISOLDE project concentrates on the construction of the SC LINAC for postaccelerated radioactive ion beams to 5.5 MeV/u in 2014 and 10 MeV/u by 2016 Beam Quality Upgrade: RFQ cooler and buncher Higher mass resolving power HRS Intensity Upgrade: The design study for technical feasibility and cost estimate for operating the facility at 15 kW once LINAC4 and PS Booster are online. 16 Instrumente der Hadronen- und Kernphysik Status of HIE-ISOLDE Civil Engineering almost finished Proton at ISOLDE stop 17.12.2012 Cooling and Ventilation work about to start Cavity prototypes designed and built Procurement main issue: cryogenic system New study for integration of the cryo-module into the shielding tunnel CERN accelerator stop on 25.2.2013 ISOLDE hall will become a radioactive controlled area During LS 1 safety shoes and hard hats mandatory 17 Status und Perspektiven Heavy-ion storage ring TSR Darmstadt, Dresden, Frankfurt, Gießen, Greifwald Heidelberg, Jena, Köln, Mainz, München 2/2012: TDR presented at INTC 4/2012: M. Grieser et al., Eur. Phys. J. Special Topics 207, 1-117 (2012) Collaboration Board defined 5/2012: CERN Research Board gave skeletron approval „experiment“ now, maybe „facility“ after LS2 8/2012: Mandate of the TSR Integration Study Working Group 10/2012: TSR@ISOLDE Workshop Working Groups and responsibilities were defined Possible planning: 2014: building provided 2014: disassembly 2015: assembly and commissioning 2016: start up 18 Ausbildung in Hadronen- und Kernphysik Education / Outreach ~20 PhD students / year About 10 CERN summer students ~10 Students for internships, Bachelor or Master thesis Active visits program for students from German universities and highschools organized by ISOLDE members Magazine „Kultur und Technik“ of the „Deutsche Museum“, issue 04/2012 Report on work as a scientist at CERN Example ISOLTRAP Experiment at ISOLDE 19 Internationale Experimente mit deutscher Beteiligung Summary ISOLDE offers a complementary technique to existing facilities in Germany ISOLDE remains a pioneering ISOL installation both at level of designing and production of frontier physics German groups obtained numerous scientific highlights at ISOLDE in recent years HIE-ISOLDE will bridge the gap to EURISOL higher energy and intensity of proton beam for more neutron-rich nuclei TSR@ISOLDE offers unique perspectives Slides were provided by: Maria Borge, Sabine Bönig, Martin Breitenfeldt, Yacine Kadi, Magda Kowalska, Kim Kreim, Norbert Pietralla, Peter Reiter, Sebastian Rothe, Marcus Scheck, Klaus Wendt, Deyan Yordanov 20