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   APAPES NEWS

 Contact:
   Project Coordinator
   Prof. Theo Zouros
   Atomic & Molecular Physics
   Dept. of Physics
   Univ. of Crete, PO Box 2208,
  . GR-71003 Heraklion
   Tel:+30-2810394117
   Fax:+30-2810394301
   e-mail: tzouros@physics.uoc.gr

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Ministry of Education, Lifelong Learning and Religious Affairs:           
THALIS grant number MIS 377289, Univ. of Crete ELKE ΚΑ #3576, ΚΑ #3577

Proposal Title:

Atomic Physics with Accelerators: Projectile Electron Spectroscopy
at the NCSR Demokritos Tandem accelerator

Principal Investigators:

Project Coordinator: Prof. Theo J.M. Zouros, Dept. of Physics, University of Crete
Co-investigator 2: Dr. Sotirios V. Harissopulos, Tandem Accelerator Laboratory, Institute of Nuclear Physics, NCSR "Demokritos"
Co-investigator 3: Prof. Emmanuel P. Benis, Dept. of Physics, University of Ioannina
Co-investigator 4: Prof. Alexandros Clouvas, Dept. of Electrical and Computer Engineering, Aristotle University of Thessaloniki

Abstract:

The only existing heavy ion accelerator in Greece, the 5.5MV TANDEM at the National Center for Scientific Research "Demokritos" in Athens, has been used to date primarily for investigations centering around nuclear physics. Here, we propose to establish the new (for Greece) discipline of Atomic Physics with Accelerators, a strong field in the EU with important contributions to fusion, hot plasmas, astrophysics, accelerator technology and basic atomic physics of ion-atom collision dynamics, structure and technology.

This will be accomplished by combining the existing interdisciplinary atomic collisions expertise from three Greek universities, the strong support of distinguished foreign researchers and the high technical ion-beam know-how of the TANDEM group into a cohesive initiative.

Employing the TANDEM as a user facility, collaborative experiments will be conducted using state-of-the-art technology, while young researchers will gain valuable hands-on expertise.

Work packages will include the design and implementation of :

  • A new beam line dedicated to atomic physics
  • Gas and foil strippers for the intense production of highly charged ions at the TANDEM
  • Specialized high-vacuum collision chamber for performing Zero-degree Auger projectile spectroscopy (ZAPS) utilizing state-of-the-art equipment
  • Doubly differentially pumped gas target
  • Data acquisition/control system for running the experiment

The hiring of a dedicated postdoc including graduate and undergraduate students will be extremely important for the overall success of the project.

Using the new ZAPS setup we shall complete a much needed systematic isoelectronic investigation of K-Auger spectra emitted from collisions of pre-excited ions with gas targets using novel techniques. Our results are expected to lead to a deeper understanding of the neglected importance of cascade feeding of metastable states1,2 in collisions of ions with gas targets and further elucidate their role in the non-statistical production of excited three-electron states by electron capture3,4, recently a field of conflicting interpretations awaiting further resolution.

References:

1T. J. M. Zouros, B. Sulik, L. Gulyαs and K. T ökési, Selective enhancement of 1s2s2p 4PJ metastable states populated by cascades in single-electron transfer collisions of F7+(1s2/1s2s 3S) ions with He and H2 targets, Phys. Rev. A 77 (2008) 050701R.

2D. Rohrbein, T. Kirchner, and S. Fritzsche, Role of cascade and Auger effects in the enhanced population of the C3+(1s2s2p 4P) states following single-electron capture in C4+(1s2s 3S)-He collisions, Phys. Rev. A 81 (2010) 042701.

3D. Strohschein, D. Rohrbein, T. Kirchner, S. Fritzsche, J. Baran, and J. A. Tanis, Nonstatistical enhancement of the 1s2s2p 4P state in electron transfer in 0.5–1.0-MeV/u C4,5+ + He and Ne collisions, Phys. Rev. A 77 (2008) 022706.

4J. A. Tanis, A. L. Landers, D. J. Pole, A. S. Alnaser, S. Hossain, and T. Kirchner, Evidence for Pauli Exchange Leading to Excited-State Enhancement in Electron Transfer, Phys. Rev. Lett. 92 (2004) 133201.


APAPES Publications (2013 - )

articles in International Journals:

  1. Experimental energy resolution of a paracentric hemispherical deflector analyzer for different entry positions and bias, M. Dogan, M. Ulu, G. G. Gennarakis, T.J.M. Zouros, Review of Scientific Instruments 84 (2013) 043105

  2. Determination of the solid angle and response function of a hemispherical spectrograph with injection lens for Auger electrons emitted from long lived projectile states, S. Doukas, I. Madesis, A. Dimitriou, A. Laoutaris, T. J. M. Zouros and E. P. Benis, Review of Scientific Instruments 86 (2015) 043111
  3. Position, energy and transit time distributions in a hemispherical deflector analyzer with position sensitive detector, Omer Sise and T.J.M. Zouros, Journal of Spectroscopy #153513 (2015)
  4. The Optimization of a 4-Element Input Lens on a Hemispherical Deflector Analyzer Using SIMION, T.J.M. Zouros, A. Kanellakopoulos, I. Madesis, A. Dimitriou, M. Fernandez-Martin, G. Martinez and T.J. Mertzimekis, Microscopy and Microanalysis 21 (suppl. 4) pp. 148-153 (2015)
  5. Evaluation of the effective solid angle of a hemispherical deflector analyser with injection lens for metastable Auger projectile states, E.P. Benis, S. Doukas, I. Madesis, A. Dimitriou, A. Laoutaris, T.J.M. Zouros, F. Parente, C. Martins, J. P. Marques and J. P. Santos, Nuclear Instruments and Methods in Physics Research 365B (2015) 457-461

  6. Evidence for the non-statistical population of the 1s2s2p 4P metastable state by electron capture in 4 MeV collisions of B3+(1s2s 3S) with H2 targets, S. Doukas, E.P. Benis, T.J.M. Zouros, Nuclear Instruments and Methods in Physics Research B 369 (2016) 83-86
  7. Voltage optimization of a 4-element Injection Lens on a hemispherical spectrograph with virtual
    entry aperture
    , G. Martinez, M. Fernandez-Martin, O. Sise, I. Madesis, A. Dimitriou, A. Laoutaris and T.J.M. Zouros, Nuclear Instruments and Methods in Physics Research B 369 (2016) 92-94
  8. Transit time spreads in biased paracentric hemispherical deflection analyzers, Omer Sise and T.J.M. Zouros, Nuclear Instruments and Methods in Physics Research B 369 (2016) 95-97
  9. The voltage optimization of a four-element lens used on a hemispherical spectrograph with virtual entry for highest energy resolution, O. Sise, G. Martinez, I. Madesis,A. Laoutaris, A. Dimitriou, M. Fernandez-Martin and T.J.M. Zouros, Journal of Electron Spectroscopy and Related Phenomena 211 (2016) 19-31
  10. High Resolution Auger Projectile Electron Spectroscopy of Li-like Ions Produced by Electron Capture in collision of He-like ions with Gaseous targets, A. Dimitriou, A. Laoutaris, I. Madesis, S. Doukas, E. P. Benis, B. Sulik, O. Sise, A. Lagoyannis, M. Axiotis, T. J. M. Zouros, Journal of Atomic, Molecular, Condensate and Nano Physics, Vol.3, No. 2, 125-131 (2016)
  11. Determination of the 1s2l2l' state production ratios 4Po/2P, 2D/2P and 2P+/2P-   from fast (1s2,1s2s 3S) mixed-state He-like ion beams in collisions with H2 targets, E.P. Benis and T.J.M. Zouros, Journal of Physics B: Atomic, Molecular and Optical Physics 49 (2016) 235202

articles in International Proceedings:

  1. Monte Carlo Calculations of the Detection Solid Angle of electrons emitted from slowly decaying projectile ion Auger states, S. Doukas, N. Angelinos, A. Kanellakopoulos, I. Madesis, A. Dimitriou, E.P. Benis, and T.J.M. Zouros, Conference Proceedings of the 6th IC-SCCE (2014) p. 282-288
  2. Atomic Physics with Accelerators: Projectile Electron Spectroscopy (APAPES), I. Madesis, A. Dimitriou, A. Lagoyannis, M. Axiotis, T. Mertzimekis, M. Andrianis, S. Harissopulos, E.P. Benis, B. Sulik, I. Valastyán, T.J.M. Zouros, Proceedings of HCI 2014 - 17th International Conferences on the Physics of Highly Charged Ions, Aug 31 - Sep 8, 2014, Bariloche, Argentina, J. Physics: Conference Series 583 (2015) 012014

  3. Energy levels, transition rates and lifetimes for Li-like ions with Z <=10 in the 1s2s(3S)3l states, J. P. Santos, J. P. Marques, M. C. Martins, P. Indelicato, E. P. Benis, T. J. M. Zouros and F. Parente, Proceedings of XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015), J. Physics: Conference Series 635 (2015) 052060.
  4. Use of Gas and Foil strippers for the production of He-like ionic beams in both pure ground state (1s2) and mixed states (1s2, 1s2s) for zero-degree Auger Projectile Electron Spectroscopy, A. Laoutaris, I. Madesis, A. Dimitriou, A. Lagoyannis, M. Axiotis, E. P. Benis and T. J. M. Zouros, Proceedings of XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015), J. Physics: Conference Series 635 (2015) 052062.
  5. Investigation of the dependence of the energy resolution of a hemispherical deflection analyzer on the distance of the position sensitive detector from the focal plane, C. Nounis, A. Laoutaris, I. Madesis, A. Dimitriou, O. Sise, E.P. Benis, T.J.M. Zouros, Proceedings of XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015), J. Physics: Conference Series 635 (2015) 052063.
  6. Separation and solid angle correction of the metastable 1s2s2p 4P Auger yield produced in ion-atom collisions using the biased as cell technique: A tool for the determination of the population mechanisms, I. Madesis, A. Laoutaris, S. Doukas , A. Dimitriou, E.P. Benis, T.J.M. Zouros, Proceedings of XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015), J. Physics: Conference Series 635 (2015) 052082.
  7. Optimal operation of a 4-element injection lens in a hemispherical spectrograph: FDM/BEM simulation and experimental demonstration, G. Martinez, I. Madesis, A. Dimitriou, A Laoutaris, O Sise and T J M Zouros, Proceedings of XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015), J. Physics: Conference Series 635 (2015) 052083.

All APAPES publications

Last Update: 11/12/16 15:31:49

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