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 ParticlesV
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 AstrophysicsB
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