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Welcome to Kloster Banz

Welcome to Kloster Banz. The Munich Accelerator for Fission Fragments at the FRM II in Garching. Facility Overview Status of MAFF Costs and Timeline Physics Case. F orschungs r eaktor M ünchen II (FRM-II): Research reactor at Garching. FRM II. Neutron flux: 8·10 14 n/cm 2 s

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Welcome to Kloster Banz

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  1. Welcome to Kloster Banz

  2. The Munich Accelerator for Fission Fragments at the FRM II in Garching • Facility Overview • Status of MAFF • Costs and Timeline • Physics Case Forschungsreaktor München II (FRM-II): Research reactor at Garching

  3. FRM II • Neutron flux: 8·1014 n/cm2s • Power: 20MW • Fully operational since fall 2004

  4. MAFF at the FRM II in Garching MINIBALL / AGATA MAFF-Trap Magnetic separator 5.9-7 AMeV LINAC Fission Source 1014 fission/sec Source exchange unit charge breeder Factor 100-1000 more intense beams compared to REX-ISOLDE Mass- separator

  5. MAFF Source side Source ( 1g UC2 ) O. Kester P. Thirolf W. Assmann M. Groß D. Habs (LMU) Source trolley Source exchange unit

  6. MAFF source Fissions/s of 1,2g U: 1,49 1014/s Uranium buring in 52 days: 17% Target: 25g Graphit with up to 1,2g 235U Operation temperature: 2400°C Materials: Re, Mo, W, BeO Calculated emittance at 30keV: e=12p mm mrad First prototype Materials: Fe, Ta, W, BeO measured emittance at 30keV: e=25p mm mrad

  7. He Kryo-panel

  8. MAFF Extraction T. Faestermann F. Nebel R. Krücken (TUM) Extraction lens x Deflector plates Electrostatic lenses Fission source 1014 fission/sec Mass separator Triplet Prototype

  9. Laser Ion optics for the extraction Configuration following Mattauch und Herzog Mass resolution:

  10. MAFF yields in comparison 109 109 Intensities of post-accelerated beams Ga Kr 11 10 MAFF EURISOL ] 10 13 10 SPIRAL 2 (10 fps) -1 SUPER-FRS 9 109 10 8 10 Post-accelerated Yield [s Ga, Kr, Sn are some of the EURISOL reference beams 7 10 6 10 Sn 5 10 4 10 124 126 128 130 132 134 136 138 140 Mass Number

  11. 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) • 235U 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

  12. MAFF costs financed

  13. MAFF funding mixed funding planned from MLL, BMBF (federal), State of Bavaria, EU, external partners MAFF timeline • 1st 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)

  14. The physics of MAFF • Structure of neutron rich exotic nuclei • Nuclear astrophysics • Production and chemistry of superheavy elements • Nuclear medicine • Material science Opportunities to be discussed at this workshop !!

  15. Using higher beam intensities for spectroscopic studies MAFF 1010 108 106 104 102 1 B(E2), S, g E(Ji), etc. detailed spectroscopy Produktionsrate REX-ISOLDE More exotic nuclei M, T1/2, E(21+) A

  16. Mass deviations in neutron-rich nuclei Results from JYFL Zr • 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

  17. MAFF-trap phase 1 (masses of fission fragments) 1. purification PT 2. mass meas./ in-trap spectr. PT RF funnel cooler/ buncher charge breeder high res. mass sep. mass separator MAFF ion source 30 keV 30 kV platform electrostatic deceleration B=7 T superconducting magnet (MAGNEX) has arrived in 2004. phase 2 (masses of reaction products, e.g. SHE) gas stopping chamber 1. purification PT 2. mass meas./ in-trap spectr. PT extraction RFQ cooler RFQ buncher MORRIS ~1 MeV/u

  18. MINIBALL

  19. 109 RIB on Pb/Bi 3·109132Sn on various targets The SHE reach of MAFF We need reliable cross-section calculations!! 120 114 112 110 108 S. Hofmann, Nucl. Phys. News Intl

  20. 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 (1st stage) finished by end of 2006

  21. Post-accelerated MAFF beams Heavier elements not shown!

  22. What makes MAFF unique? • high intensity of fission fragments • detailed spectroscopy possible • (Coulex, transfer, g—factors, 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 !!

  23. Heavy and superheavy elements • Reaction studies (isospin dependence of sER) • chemistry with long lived SHE isotopes • connecting the bottom of the Dubna chains • shell structure near 78Ni, 132Sn • 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, T1/2, GT strength

  24. Using higher beam intensities for spectroscopic studies MAFF 1010 108 106 104 102 1 B(E2), S, g E(Ji), etc. detailed spectroscopy Produktionsrate REX-ISOLDE More exotic nuclei M, T1/2, E(21+) A

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