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MATS

MATS. TOF. n. n. c. Q. Preparation. Precision. Time-of-flight. RFQ. EBIT. Mass Analyzer. Penning trap. Penning trap. detector. Precision M easurements of Very-Short Lived Nuclei Using an A dvances T rapping S ystem for Highly-Charged Ions. Frank Herfurth, GSI-Darmstadt

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MATS

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  1. MATS TOF n n c Q Preparation Precision Time-of-flight RFQ EBIT Mass Analyzer Penning trap Penning trap detector Precision Measurements of Very-Short Lived Nuclei Using an Advances Trapping System for Highly-Charged Ions Frank Herfurth, GSI-Darmstadt for the MATS Collaboration Ion production FRS Low Energy Branch Beam bunching q / A - selection Cooling process Mass measurement Detection Charge breeding

  2. The MATS collaboration CSNSM-IN2P3-CNRS Orsay: G. Audi, C. Bechelet, D. Lunney, C. Guénaut, M. Sewtz Universität Greifswald: A. Herlert, G. Marx, L. Schweikhard Universität Erlangen-Nürnberg: P.-G. Reinhard GSI-Darmstadt: D. Beck, M. Block, H. Geissel, F. Herfurth, Yu.A. Litvinov, Yu. N. Novikov, C. Scheidenberger, M. Winkler, C. Yazidjian CERN/GSI-Darmstadt: A. Kellerbauer Universität Mainz: K. Blaum, I.Bloch, S. Djekic, R. Ferrer, S. George, S. Kreim, W. Nörtershäuser, S. Stahl, J. Verdu, C. Weber Universität Gießen: W. Plass Universidad de Huelva: D. Rodríguez University of Jyväskylä: J. Äystö, A. Jokinen, I. Moore, A. Nieminen LLNL-Livermore: D. Schneider LMU München: D. Habs, S. Heinz, O. Kester, V. Kolhinen, J. Szerypo, P.G. Thirolf Michigan State University: M. Bender, G. Bollen, M. Matos, S. Schwarz MPI KP Heidelberg: J. Ullrich, J. R. Crespo López-Urrutia Universite Libre de Bruxelles: P.-H. Heenen Stockholm University: T. Fritioff, R. Schuch, N. Szilard Kolkata India: A. Ray 16 Institutes 53 Members

  3. Trapping • effective use of rare species • extended observation & interaction time • high quality q/m selection • manipulation of charged particles at low E • accumulation & bunching • charge breeding • polarization EFFICIENCY ACCURACY SENSITIVITY Mass measurements and trap assisted nuclear spectroscopy

  4. Setup • Detectors: • FT-ICR • TOF-ICR • Si(Li) electron Precision trap: mass measure- ments Cooler trap: beam preparation spectroscopy Magn. deflector: q/m separation EBIT: charge breeding

  5. Experiments with Exotic Nuclei • Detectors: • FT-ICR • TOF-ICR • Si(Li) electron T1/2 ... Mass Precision trap: mass measure- ments Laser Spectroscopy Cooler trap: beam preparation & spectroscopy Magn. deflector: q/m separation EBIT: charge breeding X- ray Spectroscopy In-Trap Spectroscopy

  6. RFQ and Mass Analyzer/Separator EBIT Mass Resolving Power m/m Number of Turns Preparation Precision RFQ Mass Analyzer Penning trap Penning trap • Electron-impact ion source • Analyzer with two grid-free electrostatic reflectors based on a four-electrode design • (A. N. Verentchikov et al., Tech. Phys. 50 (2005) 73) • MCP-detector • Kinetic energy 1.5 keV, overall length ~ 0.5 m • Short time of flight (~ 1 ms) • Currently: • Uncooled ion population • No differential pumping Aberration limit with uncooled ions m/m = 70,000 with cooled ions m/m > 105 (expected) T. Dickel, W.R. Plaß, Univerisität Gießen T. Dickel, W.R. Plaß, Univerisität Gießen

  7. RFQ and Mass Analyzer/Separator EBIT Preparation Precision RFQ Mass Analyzer Penning trap Penning trap T. Dickel, W.R. Plaß, Univerisität Gießen

  8. Charge Breeding Preparation Precision RFQ EBIT Mass Analyzer Penning trap Penning trap • cryogenic – XHV • Helmholtz coils – open access Titan EBIT, J. Crespo et al.

  9. Single Ion FT-ICR Amplification: 50000 Preparation Precision RFQ EBIT Mass Analyzer Penning trap Penning trap Universität Mainz, K. Blaum et al. Resonance of the unloaded LC-circuit at T = 4K C. Weber et al., Eur. Phys. J A 25, 65 (2005)

  10. 4-fold Penning Trap System B = 7 T ~10 mm 4.2 K Monitor trap Preparation trap2 77 K ~75 mm 20 K Measurement trap Preparation trap1 4.2 K Ions from HITRAPor an EBIT • High precision trap for HITRAP (<10-11) • New trapping and measurement techniques Universität Mainz, K. Blaum et al.

  11. Summary Preparation Precision RFQ EBIT Mass Analyzer Penning trap Penning trap Design parameters: Overall efficiency 1-5% Maximum resolving power 108 Accessable half-life 10 ms Relative mass uncertainty 10-9 Organisation and responsibilities Mainz, Greifswald, Jyväskylä, Stockholm: Penning trap system GSI, Munich, Huelva: RFQ cooler and buncher Heidelberg, GSI, Livermore, Seattle: EBIT Giessen, Mainz, Orsay: Detection system and electronics Mainz, Munich: Trap assisted spectroscopy MOU prepared – to be signed Simulations ongoing MATS will be an advances trapping system for mass spectrometry, laser spectroscopy, and in-trap decay spectroscopy with highly-charged, short-lived ions.

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