pptx, 11.2 MB - Komitee für Hadronen

Report
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
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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)
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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
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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:
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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).
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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
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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.
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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
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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
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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
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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
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