MATS: High-Precision Experiments Using an Advanced Trapping System at FAIR

Transcription

1 MATS: High-Precision Experiments Using an Advanced Trapping System at FAIR Daniel Rodríguez Departamento de Física Atómica Molecular y Nuclear Universidad de Granada For the MATS collaboration NUSTAR week 2012, Kolkata (India) October 2012

2 Outline Motivation Penning-trap techniques for radioactive isotopes Recent highlights Layout of the MATS facility On-going developments with prospects for MATS Funding External requirements for MATS Summary & outlook

3 The MATS collaboration BELGIUM: Université Libre de Bruxelles Paul-Henri Heenen, Katholieke Universiteit Leuven Rafael Ferrer CANADA: TRIUMF Jens Dilling, Paul Delheij, Alain Lapierre, Maxime Brodeur, Stephan Ettenauer, Thomas Brunner FINLAND: University of Jyväskylä, Juha Äystö, Ari Jokinen, Iain Moore, Veli Kolhinen FRANCE: CSNSM-IN2P3,CNRS Georges Audi, David Lunney, Sarah Naimi, CEA Saclay Michael Bender GERMANY: Max-Planck-Institute for Nuclear Physics Klaus Blaum, R. Burcu Cakirli, Sergey Eliseev, Yuri A. Litvinov, Szilard Nagy, Julia Repp, Christian Roux, José R. Crespo López-Urrutia Ernst-Moritz-Arndt University Gerrit Marx, Lutz Schweikhard, Falk Ziegler, Sebastian George, Friedrich-Alexander University Erlangen-Nürnberg Paul-Gerhard Reinhard GSI Dietrich Beck, Michael Block, Michael Dworschak, Hans Geissel, Sophie Heinz, Frank Herfurth, Dennis Neidherr, Wolfgang Quint, Martin Winkler, Enrique Minaya-Ramirez, Johannes Gutenberg University Klaus Eberhardt, Christopher Geppert, Jens Ketelaer, Wilfried Nörtershäuser, Birgit Schabinger, Justus-Liebig University Christoph Scheidenberger, Timo Dickel, Christian Jesch, Martin Petrick, Wolfgang R. Plaß Ludwig-Maximilians University München Robert Meissner, Jerzy Szerypo, Peter G. Thirolf, Christine Weber, Facility for Antiproton and Ion Research in Europe FAIR Alexander Herlert, Physikalisch-Technische Bundesanstalt (PTB) Joachim Ullrich. INDIA: Variable Energy Cyclotron Centre Manir Ahammed, Parnika Das, Anirban De, Amlan Ray, Raniganj Girls' College Alokkumar De RUSSIA: St. Petersburg Nuclear Physics Institute Yuri Gusev, Abdurahman Khusainov, Dmitri Nesterenko, Yuri N. Novikov, A. Popov, Maxim Seliverstov, Alexander Vasiliev, Gleb Vorobjev SPAIN: University of Granada Juan Manuel Cornejo, Antonio M. Lallena, Antonio Lorenzo, Daniel Rodríguez, IFIC-CSIC Berta Rubio, José Luis Taín, Alejandro Algora, University of Huelva José Enrique García Ramos, CIEMAT Daniel Cano- Ott, Trinitario Martínez, UPC M. Belén Gómez Hornillos, Guillén Cortés SWITZERLAND: CERN Susanne Kreim SWEDEN: Stockholm University, Reinhold Schuch, Markus Suhonen, Andreas Solders, Matthias Hobein USA: Lawrence Livermore National Laboratory Dieter Schneider Michigan State University Georg Bollen, Stefan Schwarz, Louisiana State University Milan Matos 11 countries, 27 institutes, 90 members

4 Motivation Penning-trap physics δm m Masses & Identification Mass models Nuclear Structure Halo Nuclei Heavy elements MATS At FAIR 10-8 Nuclear Astrophysics Fundamental Interactions Neutrino physics In-trap & trap assisted spectroscopy ISOLTRAP CPT, JYFLTRAP, SHIPTRAP LEBIT, TITAN, TRIGA-TRAP

5 Motivation Complementarity of MATS with other Penning traps Type of ISOL CPT SHIP JYFL LEBIT TITAN TRIGA CARIBU MLL MATS Reacion TRAP TRAP TRAP TRAP TRAP ISOL X X Fusion X X IGISOL X Fragm. X X Neutron induced fission X X Spontane ous fission X HCI X X

6 Penning-trap techniques Evolution TOF-ICR RFQ buncher Increasing accuracy & sensitivity Carbon clusters Gas stopping cells Cryogenic RFQ buncher Octopolar excitation Ramsey method Highly-charged ions Cryogenic gas stopping cell MATS At FAIR + single Ion detection ISOLTRAP CPT, JYFLTRAP, SHIPTRAP LEBIT, TITAN, TRIGA-TRAP

7 High-precision mass measurements at RIB Survey Relative mass uncertainty TITAN (TRIUMF) ISOLTRAP (CERN) Practicable with higher production rates CPT (ANL) SHIPTRAP (GSI) LEBIT (MSU) Half-life (ms) JYFLTRAP (JYVASKYLA) Storage rings (Talk by H. Weick) TRIGA-TRAP MLL-TRAP TRAPSENSOR High-lights : S. Eliseev et al., PRL 106 (2011) , E. Haettner et al., PRL 106 (2011) , S. Eliseev et al., PRL 107 (2011) , S. Ettenauer et al., PRL 107 (2011) , M. Brodeur et al., PRL 108 (2012) , D. Fink et al., PRL 108 (2012) , M. Brodeur et al., PRL108 (2012) , J. Hakala et al., PRL 109 (2012) , A. T. Gallant et al., PRL 109 (2012) , E. Minaya Ramirez et al., Science 337 (2012) 1207.

8 Recent highlights (TITAN) Nuclear (Penning-trap) astrophysics at TRIUMF (June 2012) rp-process (highly-charged ions) V. Simon et al., Phys. Rev. C 85 (2012)

9 Recent highlights (TITAN) Nuclear (Penning-trap) astrophysics at TRIUMF (June 2012) rp-process (highly-charged ions) V. Simon et al., Phys. Rev. C 85, (2012)

10 Recent highlights (SHIPTRAP) NUSTAR (Penning-trap) experiment at GSI (September 2012) Nuclear Structure (minute production) The isotope with lowest production rate ever measured in a Penning trap ( 256 Lr, 60(18) nb) 48 ions detected in 93 hours!!! E. Minaya Ramirez et al., Science 337 (2012) 1207

11 Layout of the MATS facility TDR approved by FAIR STI in May 2010 Dipole magnet (Jyväskylä) RFQ buncher (Jyväskylä) MR-TOF-MS (Giessen) LaSpec facility (talk by W. Nörtershäuser) MATS Penning traps (LMU, Granada, GSI, Mainz, MPIK, Sweden, VECC) EBIT (MPIK) Spectroscopy setup (IFIC, UPC) Beam line, ion sources, identification (Greifswald, PNPI) In-trap decay (LMU, PNPI) Gas catcher (Giessen, GSI, Jyväskylä, KVI)

12 Layout of the MATS facility TDR approved by FAIR STI in May 2010 Dipole magnet (Jyväskylä) RFQ buncher (Jyväskylä) MR-TOF-MS (Giessen) LaSpec facility (talk by W. Nörtershäuser) MATS Penning traps (LMU, Granada, GSI, Mainz, MPIK, Sweden, VECC) EBIT (MPIK) Spectroscopy setup (IFIC, UPC) Beam line, ion sources, identification (Greifswald, PNPI) In-trap decay (LMU, PNPI) Gas catcher (Giessen, GSI, Jyväskylä, KVI)

13 Developments The Penning-trap system TRIGA-TRAP (Mainz & MPIK) ECR ion source TRIGA-LASER W. Nörtershäuser Mass separator RFQ Project TRIGA (Mainz): 01/08 J. Ketelaer et al., Nucl. Instrum. Methods A 594, 162 (2008) Start data taking: 05/09 TRIGA-TRAP K. Blaum

14 Developments The Penning-trap system TRIGA-TRAP (Mainz & MPIK) ECR ion source TRIGA-LASER W. Nörtershäuser Mass separator RFQ Project TRIGA (Mainz): 01/08 J. Ketelaer et al., Nucl. Instrum. Methods A 594, 162 (2008) TRIGA-TRAP Start data taking: 05/09 K. Blaum

15 Recent results (TRIGA-TRAP) The half-life of 184 Os Neutrino-less double EC (0ν2ɛ) Is the neutrino a Majorana or Dirac particle? 0n2ɛ might be resonantly enhanced (T 1/2 ~10 25 y) Contribution of Penning traps: Search for nuclides with =(Q εε B 2h -E γ ) < 1 kev by measurements of Q εε values at ~100 ev accuracy level

16 Recent results (TRIGA-TRAP) The half-life of 184 Os Neutrino-less double EC (0ν2ɛ) Is the neutrino a Majorana or Dirac particle? 0n2ɛ might be resonantly enhanced (T 1/2 ~10 25 y) Contribution of Penning traps: Search for nuclides with =(Q εε B 2h -E γ ) < 1 kev by measurements of Q εε values at ~100 ev accuracy level TRIGA-TRAP Q-value = (0.58) kev Several terms calculated by V.M. Shabaev et al., & T. Rodríguez et al. C. Smorra, T. Rodríguez et al. (2012), in press

17 Developments The Penning-trap system TRAPSENSOR (Granada) UGR lab finished in March 2012 Photo: 20/07/2012 Superconducting magnet available at UGR in October 2012 Quantum Sensor test bench (Ca + ions) The beamline will serve for tests for MATS Location for laser system for Mg + ions cooling (FEDER2010) D. Rodríguez, Appl. Phys. B 107 (2012) 1031

18 Developments The Penning-trap system TRAPSENSOR (Granada) UGR lab finished in March 2012 Photo: 20/07/2012 Superconducting magnet available at UGR in October 2012 Quantum Sensor test bench (Ca + ions) PT under construction The beamline will serve for tests for MATS) Location for laser system for Mg + ions cooling (FEDER2010) D. Rodríguez, Appl. Phys. B 107 (2012) 1031

19 Developments The Penning-trap system TRAPSENSOR (Granada) UGR lab finished in March 2012 Photo: 20/07/2012 Superconducting magnet available at UGR in October 2012 Quantum Sensor test bench (Ca + ions) PT under construction More on Penning traps tomorrow by Amlan Ray (VECC) The beamline will serve for tests for MATS) Location for laser system for Mg + ions cooling (FEDER2010) D. Rodríguez, Appl. Phys. B 107 (2012) 1031

20 Developments The detector trap (LMU-Munich) Arrangement of a cubic detector trap Main characteristics: - single-sided Si-strip detector - active area: 30 x 30 mm 2 - depletion depth: 300 mm - 30 strips: pitch = 1 mm - operation voltage: -100 V - energy resolution: DE a < 20 kev - glued on AlN ceramic circuit board - customized connector (PEEK) - spring-loaded contact pins - multiwire ribbon cables (Kapton) Novel approach: detector trap Goal within MATS: enable in-trap and conversion-electron spectroscopy exploit stored ions as carrier-free source R & D status: development of UHV & cryo-compatible, positionsensitive a detector from scratch Assembling a customized Si-strip detector A set of 12 strip detectors has been produced and has been characterized!!! P. Thirolf, C. weber

21 Developments Trap-assisted spectroscopy (GSI) Measurement trap Detectors (D. Rudolph et al.,) M. Block et al., Penning trap as high-resolution mass separator (also at JYFLTRAP See A. Algora et al., PRL 105 (2010) )

22 Developments MR-TOF(Giessen) Ions Internal Ion Source Injection Trap System 10-4 mbar Curved RFQs 10-2 mbar Separated Ions Isobar Separation Mode High Resolution Mode Broadband Mode 10-6 mbar Time-of-Flight Analyzer Energy Buncher Kinetic Energy 1.5 kev Gate Detectors 10-8 mbar Ion Gate Isochronous SEM Mass Measurement Post-Analyzer Reflector Aux. Detector W.R. Plaß et al., NIMB 266 (2008) 4560 m/ m > 10 5 m/ m > 10 5, Mass Accuracy Full Mass Range, m/ m ~ 4000

23 Developments MR-TOF(Giessen) Ions Internal Ion Source Injection Trap System Time-of-Flight Analyzer Kinetic Energy 1.5 kev 10-8 mbar 10-4 mbar Curved RFQs 10-2 mbar 10-6 mbar Ion Gate Energy Buncher Separated Ions Gate Detectors Isochronous SEM Mass Measurement Isobar Separation Mode High Resolution Mode PERFORMANCE Broadband Mode Mass Resolving Power: 600,000 Mass Measurement Accuracy:~10-7 Measurement Duration: ~10 ms Sensitivity: ~10 ions Repetition Rate: up to 400 Hz Transmission efficiency: up to 70% Ion Capacity: > 10 6 ions / s Isobaric Dynamic Range: > 10 4 World-wide unique combination of performance characteristics, ideally suited for the LEB of the Super-FRS Post-Analyzer Reflector Aux. Detector W.R. Plaß et al., NIMB 266 (2008) 4560 m/ m > 10 5 m/ m > 10 5, Mass Accuracy Full Mass Range, m/ m ~ 4000

24 Developments Control system (GSI) The largest part of the software for the MATS control system is already available at GSI. Right now additional software packages are developed, like a new graphical user interface, which should be: easy to use (all controllable elements have to be reached with not more than two mouse clicks) easy to maintain (small changes in the configuration, like exchange of a PS can already be done within a couple of minutes) easy to extend (to be done) (larger changes, like changing of beam line structure consume right now too much time)

25 Funding Institute Commitment (k ) Secured (k ) Univ. Greifswald PNPI Univ. Jyväskylä MPIK-Heidelberg 1, GSI VECC Kolkata Orsay/ Univ. Paris Sud Univ. Granada Univ. Stockholm LMU-Munich Univ. Giessen TOTAL 3, ,392.6

26 External requirements for MATS The rare ion beam separator Super-FRS Gas cell needs well separated beam otherwise too much ionization load from unwanted isotopes Energy bunching is required to keep the gas cell reasonably short and to operate it at reasonable pressures.

27 External requirements for MATS The cryogenic stopping cell for the LEB 100 cm Extraction RFQ Exit hole Insulation 223 Ra source vacuum Outer chamber (room temperature) M. Ranjan et al., Europhys. Lett. 96 (2011) M. P. Reiter, Master Thesis, Justus-Liebig-Universität Gießen (2011) DC cage electrodes Inner chamber (cooling by cryo-cooler down to K) RF carpet Developed in Collaboration

28 External requirements for MATS Experimental setup at the FRS (GSI) On-line test of the with 238 U projectile fragments produced at 1 GeV/u at the FRS in October 2011 and July/August 2012 Cryogenic stopping cell Diagnostics unit Time-of-flight mass spectrometer Beam from FRS Courtesy by W.R. Plaß

29 External requirements for MATS Experimental setup at the FRS (GSI) On-line test of the with 238 U projectile fragments produced at 1 GeV/u at the FRS in October 2011 and July/August 2012 Cryogenic stopping cell Diagnostics unit Time-of-flight mass spectrometer Beam from FRS Ion survial and extraction efficiency ~ 50% Extraction times ~ 25 ms Courtesy by W.R. Plaß

30 External requirements for MATS Experimental setup at the FRS (GSI) On-line test of the with 238 U projectile fragments produced at 1 GeV/u at the FRS in October 2011 and July/August 2012 Beam from FRS Cryogenic stopping cell Diagnostics unit Time-of-flight mass spectrometer MR-TOF-MS commissioned on-line First direct mass measurements with an MR-TOF-MS, including 213 Rn (T 1/2 = 20 ms) Ion survial and extraction efficiency ~ 50% Extraction times ~ 25 ms Courtesy by W.R. Plaß

31 Summary & Outlook MATS will incorporate the most advanced technical developments on Penning traps, at FAIR. This will allow continuing and complementing the successful measurement program carried out at existing facilities. The Technical Design Report was approved by the FAIR STI in May 2010, and since them, many developments have been accomplished. MATS will also allow for other outstanding experiments besides mass measurements. Several groups have received funding, for R&D and, to start the construction of the different components. The MATS system will be tested and ready before FAIR comes into operation. External requirements like the cryogenic gas stopping cell are in an advanced stage. MATS needs still the energy buncher and the LEB to perform the measurements.

32 Thank you very much to Klaus Blaum (MPIK): Peter Thirolf and Christine Weber (LMU-Munich) Wolfgang Plass (Giessen) Michael Block (GSI) Dennins Neidherr (GSI) Y. Novikov (PNPI) Juan Manuel Cornejo (Granada) For their contribution to this talk The MATS collaboration For the work all of you For your attention

33 Thank you very much to

34 Contributions Pre-construction MoU Contributions from Interim MATS MoU(15/02/2011)

35 Developments State selection by half-life (GSI) 195 Po 195 Po (13/2 + ) T 1/2 = 1.92 s E a = 6.84 MeV (3/2 - ) T 1/2 = 4.64 s E a =6.64 MeV α-spectrum for different storage time in the Penning trap short-lived state decays a-daughter not captured due to high recoil preparation of a single state in addition: mass spectrometric cleaning possible L.-L. Andersson et al., GSI Scientific Report, NUSTAR-SHE (2011)