Bericht zu ISOLDEReport on ISOLDE

Susanne Kreim30. November 2012

1) ISOLDE – numbers and developments2) Low-energy experiments

3) Post-accelerated beams and upgrades

KHuK Jahrestagung Bad Honnef

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ISOLDE – German Contribution

MINIBALL

ISOLTRAP

WITCH

REX

CRISCOLLAPS

CONTROLROOM

Class-A lab

Target/front-end

U DarmstadtU KölnLMU München

U MünsterU DarmstadtU Mainz

REX-ISOLDEU BonnU DarmstadtU KölnLMU MüchenTU München

GSIMPIKU MainzU Tübingen

GSIMPIKTU DresdenU Greifswald

RILISU Mainz

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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

ISOLDE Statistics - GeneralEx

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ISOLDE Statistics - Physics

~ 80% reliability!

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

1 shift = 8h of protons on the target

13 experiments out of 51 scheduled in 2012 have a

spokesperson from a German institute

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Dual RILIS Operation 2012

RILIS = Resonance Ionization Laser Ion SourceUpgraded in 2011 with solid-state Ti:Sa laser systemDual 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 separationestablished data communication between RILIS and ISOLDE experiments Applied for laser spectroscopy of Au isotopes

0.0

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197 AubroadbandTHG Ti:Sa

267.7 nm

-10 -5 0 5 10 15 20 25

0.0

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1.0

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narrowbandTHG Ti:Sa

relative frequency (GHz)

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1. ISOLDE Target:Production of exotic nuclei

2. RILIS:Element selective ionization

3. LIST:Full Isobar Suppression

High-selective ion-beam production with Laser Ion Source & Trap (LIST)

ISOLDEtarget

RILISLIST Extractor

Laser Beams

Selectivity Gain for 22Mg / 22Na ratio

1. 2. 3.205Fr

S = 2400

KUL Windmill Detector

First successful LIST online run !

COLLAPS Harvest

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Proposals at COLLAPS: Data Taking, in Preparation, Just Completed

Cu, Ga, Zn

Mg

Be

Cd

IS480 (K. Blaum, MPIK Heidelberg) PRL 108, 042504 (2012)

IS439 (K. Flanagan, CERN) PLB 703 (2011)IS457 (B. Cheal, Manch.) PRC 84, 024303 (2011) IS519 (B. Cheal, Manch.) PRC 86, 034329 (2012)

IS449 (W. Nörtershäuser & Ch. Geppert, Mainz) PRL 108, 142501 (2012)

K, Ca, MnIS497 (D. Yordanov, MPIK)

IS484 (G. N

eyens, L

euven)

IS508 (B. C

heal, Manch

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IS529 (M.L.

Bissell,

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Pr IS517 (Ch. Geppert, Mainz)

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WITCH: Weak Interaction Trap for Charged Particles

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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 physicsBest test case for WITCH 35Ar

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WITCH Online Runs 2011/2012

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First data sets with 35Ar taken 2011Found 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 35ArStill had hints for ionization in the systemData analysis and further offline tests will reveal systematic effects

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82Zn for Nuclear Structure and Astrophysics

Helps to pin down nuclear models to study the behavior of nuclei at the extremes of stability

Its determination is important for modelling of the crust of neutron stars

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High-precision Penning-trap mass spectrometry with ISOLTRAP

R. N. Wolf et al., PRL, submitted (2012)

MR-TOF MS at ISOLTRAP

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)

6.3475 6.3480 6.3485 6.3490 6.34951

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time of flight / ms

54Cr

54Ti 54Ca ?

358 revolutions in the MR-ToF MSbeam gate = 30 ms16000 shots

R. N. Wolf et al., Nucl. Instr. and Meth. A 686, 82-90 (2012), S. Kreim et al., INTC-P-317, IS 532 (2011)

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Shell stabilization in N=80 isotones?

measured B(E2;2+0+) valuesof 140Nd and 142SmTrend of increasing B(E2) continuous beyond Z=58 within errorsObservation of local suppression in collectivity at Z=58New data provide evidence for “shell stabilization” mechanism introduced in PRL 96, 122501 (2006).

View at the opened target chamber:

Systematics of B(E2) values in N=80 isotones:

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Post-accelerated beam from REX-ISOLDEMethod: Coulomb excitation in inverse kinematics at the MINIBALL setupMINIBALL array of 8 3-fold segmented high-purity Germanium clustersParticle identification via double-sided Si detectors

AG Pietralla

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Coulomb Excitation of 123,128Cd @ Miniball

123Cd: Level scheme has to be sorted out

128Cd: B(E2)-value has to be extracted

IS477

IS524

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Octupole Deformation in 224Ra

Mass number A

224Ra

Miniball

Triple C

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DSSDParticle detector

224Ra good candidate to look for CP-violating static electric dipole moment

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Near Future: HIE-ISOLDE Project

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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 buncherHigher mass resolving power HRS

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Status of HIE-ISOLDE

Civil Engineering almost finishedProton at ISOLDE stop 17.12.2012Cooling and Ventilation work about to startCavity prototypes designed and builtProcurement main issue: cryogenic systemNew study for integration of the cryo-module into the shielding tunnel

CERN accelerator stop on 25.2.2013ISOLDE hall will become a radioactive controlled areaDuring LS 1 safety shoes and hard hats mandatoryIn

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Heavy-ion storage ring TSR 2/2012: TDR presented at INTC4/2012: 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 provided2014: disassembly2015: assembly and commissioning2016: start up

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Darmstadt,Dresden, Frankfurt,Gießen,GreifwaldHeidelberg,Jena,Köln,Mainz,München

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Education / Outreach~20 PhD students / yearAbout 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

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ISOLDE offers a complementary technique to existing facilities in GermanyISOLDE remains a pioneering ISOL installation both at level of designing and production of frontier physicsGerman groups obtained numerous scientific highlights at ISOLDE in recent yearsHIE-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

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