Reiner Krcken Welcome to Kloster Banz Slide 2 Reiner Krcken The
Munich Accelerator for Fission Fragments at the FRM II in Garching
Facility Overview Status of MAFF Costs and Timeline Physics Case
Forschungsreaktor Mnchen II (FRM-II): Research reactor at Garching
Slide 3 Reiner Krcken FRM II Neutron flux: 810 14 n/cm 2 s Power:
20MW Fully operational since fall 2004 Slide 4 Reiner Krcken MAFF
at the FRM II in Garching Fission Source 10 14 fission/sec Mass-
separator 5.9-7 AMeV LINAC MINIBALL / AGATA Source exchange unit
Magnetic separator MAFF-Trap charge breeder Factor 100-1000 more
intense beams compared to REX-ISOLDE Slide 5 Reiner Krcken MAFF
Source side Source exchange unit Source trolley Source ( 1g UC 2 )
O. Kester P. Thirolf W. Assmann M. Gro D. Habs (LMU) Slide 6 Reiner
Krcken MAFF source Target: 25g Graphit with up to 1,2g 235 U
Operation temperature: 2400C Materials: Re, Mo, W, BeO Calculated
emittance at 30keV: =12 mm mrad First prototype Materials: Fe, Ta,
W, BeO measured emittance at 30keV: =25 mm mrad Fissions/s of 1,2g
U: 1,49 10 14 /s Uranium buring in 52 days: 17% Slide 7 Reiner
Krcken He Kryo-panel Slide 8 Reiner Krcken MAFF Extraction x
Electrostatic lenses Mass separator Fission source 10 14
fission/sec Deflector plates Extraction lens Triplet Prototype T.
Faestermann F. Nebel R. Krcken (TUM) Slide 9 Reiner Krcken Ion
optics for the extraction Configuration following Mattauch und
Herzog Mass resolution: Laser Slide 10 Reiner Krcken Slide 11 GaKr
Sn MAFF yields in comparison Ga, Kr, Sn are some of the EURISOL
reference beams Intensities of post-accelerated beams
124126128130132134136138140 10 4 5 6 7 8 9 11 Post-accelerated
Yield [s ] Mass Number MAFF EURISOL SPIRAL 2 (10 13 fps) SUPER-FRS
10 9 Slide 12 Reiner Krcken Status of the MAFF project beam pipe
SR6 is installed Ion source: First prototype of the ion source has
been built and tested Final version ready for assembly and testing
(EURONS/SAFERIB) 235 U source material available prototype of beam
pipe at MLL for tests of ion source and cryo-panel prototype of
cryo-panel constructed, test in 2005 (EURISOL DS) prototype of lens
trolley under construction detailed calculations for distribution
of radioactivity performed design of other system components e.g.
vacuum system, source changer, and mass separator completed charge
breeder under design (EURONS/Charge Breeding) stage 1 of the
authorization procedure in 2005 / 2006 Instrumentation: MINIBALL
under routine operation at REX-ISOLDE (using MAFF resonator) MAFF
Trap magnet commissioned, trap parts completed Slide 13 Reiner
Krcken MAFF costs MAFF - ISource & Source changing unit3100 T
(inside FRM 2 building)Beam extraction3200 T System control &
survey900T Vacuum system2200 T Liquid Helium System2300 T
Infrastructure1900 T TV (authorization procedure)1600 T740 T 15200
T MAFF - IIBeam preparation & transport1200 T LINAC5300 T677 T
Vacuum system400 T System control & rad. Surv.500 T 7400 T
InstrumentationMINIBALL3000 T MAFF-Trap300 T MORRIS Recoil
Separator1000 T 4300 T Total26900 T4717 T financed Slide 14 Reiner
Krcken MAFF timeline 1 st stage of authorization procedure
(2005/06) construction of MAFF-I: 5-6 years (constraint by funding)
construction of MAFF-II: 3 years (partly parallel to MAFF-I) MAFF
funding mixed funding planned from MLL, BMBF (federal), State of
Bavaria, EU, external partners Slide 15 Reiner Krcken Structure of
neutron rich exotic nuclei Nuclear astrophysics Production and
chemistry of superheavy elements Nuclear medicine Material science
The physics of MAFF Opportunities to be discussed at this workshop
!! Slide 16 Reiner Krcken Using higher beam intensities for
spectroscopic studies 10 10 8 10 6 10 4 10 2 1 A REX-ISOLDE MAFF
detailed spectroscopy More exotic nuclei Produktionsrate B(E2), S,
g E(J i ), etc. M, T 1/2, E(2 1 + ) Slide 17 Reiner Krcken Mass
deviations in neutron-rich nuclei Results from JYFL New mass
measurements, e.g. at JYFL, show that masses from beta- end-point
energies in neutron-rich nuclei are systematically wrong Better
mass measurements needed, e.g. for r-process calculations Highly
charged ions will improve accuracies significantly Zr Slide 18
Reiner Krcken MAFF-trap RFQ buncher extraction RFQ cooler MORRIS
gas stopping chamber ~1 MeV/u 30 kV platform MAFF ion source mass
separator 30 keV electrostatic deceleration charge breeder RF
funnel cooler/ buncher 1. purification PT 2. mass meas./ in-trap
spectr. PT phase 1 (masses of fission fragments) phase 2 (masses of
reaction products, e.g. SHE) high res. mass sep. 1. purification PT
2. mass meas./ in-trap spectr. PT B=7 T superconducting magnet
(MAGNEX) has arrived in 2004. Slide 19 Reiner Krcken MINIBALL Slide
20 Reiner Krcken 10 9 RIB on Pb/Bi 310 9 132 Sn on various targets
The SHE reach of MAFF S. Hofmann, Nucl. Phys. News Intl We need
reliable cross-section calculations!! 108 110 112 114 120 Slide 21
Reiner Krcken What do we want from you? We want to collect / update
ideas for the MAFF physics case Basic question: Where can MAFF make
unique contributions? What makes MAFF unique? high intensity of
fission fragments detailed spectroscopy possible reaching more
exotic nuclei fusion evaporation reactions with n-rich beams
parallel operation of low and high energy beam possible capability
to perform long experiments (e.g. for SHE) Next steps MAFF white
paper by fall 2005 MAFF technical report by end of 2005
Authorization procedure (1 st stage) finished by end of 2006 Slide
22 Reiner Krcken Post-accelerated MAFF beams Heavier elements not
shown! Slide 23 Reiner Krcken Slide 24 What makes MAFF unique? high
intensity of fission fragments detailed spectroscopy possible
(Coulex, transfer, gfactors, lifetimes, etc.) reaching more exotic
nuclei extending mass measurements decay spectroscopy fusion
evaporation reactions with n-rich beams parallel operation of low
and high energy beam possible capability to perform long
experiments (e.g. for SHE) it is relatively cheap !! Slide 25
Reiner Krcken Heavy and superheavy elements Reaction studies
(isospin dependence of ) chemistry with long lived SHE isotopes
connecting the bottom of the Dubna chains shell structure near 78
Ni, 132 Sn single-particle energies, occupancies masses, g-factors,
lifetimes evolution of residual interactions search for effects of
diffuse surface (shell quenching) shape evolution shape transitions
shape coexistence r-process nuclei masses, T 1/2, GT strength Slide
26 Reiner Krcken Using higher beam intensities for spectroscopic
studies 10 10 8 10 6 10 4 10 2 1 A REX-ISOLDE MAFF detailed
spectroscopy More exotic nuclei Produktionsrate B(E2), S, g E(J i
), etc. M, T 1/2, E(2 1 + )
