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Bericht zu ISOLDE Report on ISOLDE

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1 Bericht zu ISOLDE Report on ISOLDE
Forschen für die Zukunft Susanne Kreim 30. November 2012 ISOLDE – numbers and developments Low-energy experiments Post-accelerated beams and upgrades KHuK Jahrestagung Bad Honnef

2 ISOLDE – German Contribution
Class-A lab REX-ISOLDE U Bonn U Darmstadt U Köln LMU Müchen TU München Exotische Kerne RILIS U Mainz Target/front-end U Münster U Darmstadt U Mainz U Darmstadt U Köln LMU München REX WITCH MINIBALL CONTROL ROOM COLLAPS CRIS ISOLTRAP GSI MPIK U Mainz U Tübingen GSI MPIK TU Dresden U Greifswald

3 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.) Exotische Kerne

4 ISOLDE Statistics - Physics
13 experiments out of 51 scheduled in 2012 have a spokesperson from a German institute Exotische Kerne Year Shifts requested Shifts scheduled Shifts delivered 2009 ~480 ~400 350 2010 ~500 340 2011 ~650 ~440 360 2012 830 540 Not counted yet ~ 80% reliability! 1 shift = 8h of protons on the target

5 Dual RILIS Operation 2012 Hochtechnologie für die Grundlagenforschung
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 Hochtechnologie für die Grundlagenforschung

6 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 LIST Extractor RILIS Laser Beams ISOLDE target Selectivity Gain for 22Mg / 22Na ratio First successful LIST online run ! 205Fr S = 2400 1. 2. 3. KUL Windmill Detector

7 COLLAPS Harvest Atomkerne - Bausteine unserer Welt
Proposals at COLLAPS: Data Taking, in Preparation, Just Completed Atomkerne - Bausteine unserer Welt IS484 (G. Neyens, Leuven) IS508 (B. Cheal, Manch.) IS529 (M.L. Bissell, Leuven) Pr Cd IS517 (Ch. Geppert, Mainz) K, Ca, Mn IS497 (D. Yordanov, MPIK) Cu, Ga, Zn IS439 (K. Flanagan, CERN) PLB 703 (2011) IS457 (B. Cheal, Manch.) PRC 84, (2011) IS519 (B. Cheal, Manch.) PRC 86, (2012) Mg IS480 (K. Blaum, MPIK Heidelberg) PRL 108, (2012) Be IS449 (W. Nörtershäuser & Ch. Geppert, Mainz) PRL 108, (2012)


9 WITCH: Weak Interaction Trap for Charged Particles
V Standardmodell der Teilchenphysik 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 9

10 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 Standardmodell der Teilchenphysik 10

11 82Zn for Nuclear Structure and Astrophysics
B High-precision Penning-trap mass spectrometry with ISOLTRAP Kerne und Sterne Comparison of experimental data to state-of-the-art HFB calculations. What can be seen from the plot is that although there is quite good agreement of some models for measured masses, the scatter largely in their predictions for 78Ni. HFB-D1S: it is the approach by the Bruyeres-le-Chatel group with the Gogny force (Delaroche, Hilaire, Girod et al.), which includes quadrupole correlations; - HFB-Sly4: it is the Skyrme-GCM approach of Bender, Bertsch, Heenen, which includes quadrupole correlations; - HFB-BSk17: it is the Skyrme-HFB calculation of Goriely et al. (HFB-17); - HFB-SkP: it is the Skyrme-HFB calculation of Stoitsov, Dobaczewski, Nazarewicz et al.; Astrophysics: global, microscopic HFB models (Goriely) are linked to the equation of state of a neutron star. The mass enters as an input parameter to check at what depth in the neutron-star crust what nuclei is energetically allowed to exist and is in equilibrium with the surrounding degenerate electron gas and some free neutrons. Its determination is important for modelling of the crust of neutron stars Helps to pin down nuclear models to study the behavior of nuclei at the extremes of stability R. N. Wolf et al., PRL, submitted (2012)

12 MR-TOF MS at ISOLTRAP Die Grenzen der Stabilität von Kernen
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) Die Grenzen der Stabilität von Kernen Isobars with the same energy but of slightly different mass will be reflected between the electrostatic mirrors. Their time-of-flight is proportional to the square root of the mass. Thus, after some time, the isobars will have separated in time-of-flight, which can be seen on a multi-channel plate detector. In the case of 54Cr and 54Ti, the resolving power is about 10^3, the difference in mass about 10 MeV. The spectrum in the lower right corner has the same x-axis as the one in the upper right corner. The ion counts are now depicted by the color code, the y-axis is time or number of measurement cycles. R. N. Wolf et al., Nucl. Instr. and Meth. A 686, (2012), S. Kreim et al., INTC-P-317, IS 532 (2011)

13 Shell stabilization in N=80 isotones?
Systematics of B(E2) values 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 high-purity Germanium clusters Particle identification via double-sided Si detectors Die Landkarte der Nuklide View at the opened target chamber: 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, (2006). AG Pietralla

14 Coulomb Excitation of 123,128Cd @ Miniball
IS524 123Cd: Level scheme has to be sorted out Die Entstehung der Elemente IS477 128Cd: B(E2)-value has to be extracted

15 Octupole Deformation in 224Ra
Miniball Triple Cluster 224Ra Fundamentale Symmetrien DSSD Particle detector 224Ra good candidate to look for CP-violating static electric dipole moment Mass number A

16 Near Future: HIE-ISOLDE Project
Energy Upgrade: The HIE-ISOLDE project concentrates on the construction of the SC LINAC for post-accelerated radioactive ion beams to 5.5 MeV/u in 2014 and 10 MeV/u by 2016 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. Beam Quality Upgrade: RFQ cooler and buncher Higher mass resolving power HRS Instrumente der Hadronen- und Kernphysik 16

17 Status of HIE-ISOLDE Instrumente der Hadronen- und Kernphysik
Civil Engineering almost finished Proton at ISOLDE stop 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 ISOLDE hall will become a radioactive controlled area During LS 1 safety shoes and hard hats mandatory Instrumente der Hadronen- und Kernphysik

18 Heavy-ion storage ring TSR
2/2012: TDR presented at INTC 4/2012: M. Grieser et al., Eur. Phys. J. Special Topics 207, (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: Workshop Working Groups and responsibilities were defined Status und Perspektiven Possible planning: 2014: building provided 2014: disassembly 2015: assembly and commissioning 2016: start up Darmstadt, Dresden, Frankfurt, Gießen, Greifwald Heidelberg, Jena, Köln, Mainz, München

19 Education / Outreach Ausbildung in Hadronen- und Kernphysik
~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 high-schools 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 Ausbildung in Hadronen- und Kernphysik

20 Summary Internationale Experimente mit deutscher Beteiligung
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 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 Internationale Experimente mit deutscher Beteiligung

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