Precision Measurements of Very-Short Lived Nuclei Using an Advances Trapping System for Highly-Charged Ions q / A - selectionCooling processMass measurement.

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Presentation transcript:

Precision Measurements of Very-Short Lived Nuclei Using an Advances Trapping System for Highly-Charged Ions q / A - selectionCooling processMass measurement Ion production FRS Low Energy Branch DetectionBeam bunching Charge breeding Frank Herfurth, GSI-Darmstadt for the MATS Collaboration MATS

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 The MATS collaboration 16 Institutes 53 Members

 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 Trapping

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

EBIT: charge breeding Magn. deflector: q/m separation Cooler trap: beam preparation & spectroscopy Precision trap: mass measurements Detectors: - FT-ICR - TOF-ICR - Si(Li) electron Experiments with Exotic Nuclei Mass T 1/2... Laser Spectroscopy X- ray Spectroscopy In-Trap Spectroscopy

RFQ and Mass Analyzer/Separator T. Dickel, W.R. Plaß, Univerisität Gießen 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 > 10 5 (expected) Number of Turns Mass Resolving Power m/  m Preparation Penning trap Mass Analyzer Precision Penning trap RFQ EBIT T. Dickel, W.R. Plaß, Univerisität Gießen

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

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

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

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

Design parameters: Overall efficiency1-5% Maximum resolving power10 8 Accessable half-life 10 ms Relative mass uncertainty10 -9 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 Organisation and responsibilities MATS will be an advances trapping system for mass spectrometry, laser spectroscopy, and in-trap decay spectroscopy with highly-charged, short-lived ions. Preparation Penning trap Mass Analyzer Precision Penning trap EBITRFQ Summary MOU prepared – to be signed Simulations ongoing