• Latest Papers

     Latest News

    Contact

    EPOS Project

     

     

    Latest News, Talks, Papers, Photos, Events  ...

     

    2017 We will organize PSD-17 in September this year: http://www.psd-17.org/

     

    Paper:

    "Glassy dynamics of polymethylphenylsiloxane in one- and two-dimensional nanometric confinement - A comparison"

    J. Chem. Phys. 146, 203302 (2017)

    Wycliffe K. Kipnusu, Mohamed Elsayed, Reinhard Krause–Rehberg, and Friedrich Kremer

     

    Paper:

    "As-vacancy complex in Zn-diffused GaAs: Positron lifetime spectroscopy study "

    Scripta Materialia 131 (2017) 72–75

    M. Elsayed, R. Krause-Rehberg

     

    2016

    Paper:

    ChemistrySelect 2016, 1, 4320 – 4325

    "Missing Building Blocks Defects in a Porous Hydrogen–bonded Amide-Imidazolate Network Proven by Positron Annihilation Lifetime Spectroscopy"

    Suvendu Sekhar Mondal, Subarna Dey, Ahmed G. Attallah, Asamanjoy Bhunia, Alexandra Kelling, Uwe Schilde, Reinhard Krause-Rehberg, Christoph Janiak, and Hans-Jürgen Holdt

     

    Paper:

    Chem. Eur. J. 2016, 22, 6905 – 6913

    "Study of the Discrepancies between Crystallographic Porosity and Guest Access into Cadmium–Imidazolate Frameworks and Tunable Luminescence Properties by Incorporation of Lanthanides"

    Suvendu Sekhar Mondal, Asamanjoy Bhunia, Ahmed G. Attallah, Philipp R. Matthes, Alexandra Kelling, Uwe Schilde, Klaus Mueller-Buschbaum, Reinhard Krause-Rehberg, Christoph Janiak, and Hans-Juergen Holdt

     

    Paper:

    Scientific Reports 6, Article number: 31238 (2016)

    "ZnO Luminescence and scintillation studied via photoexcitation, X-ray excitation, and gamma-induced positron spectroscopy"

    J. Ji, A. M. Colosimo, W. Anwand, L. A. Boatner, A. Wagner, P. S. Stepanov, T. T. Trinh, M. O. Liedke, R. Krause-Rehberg, T. E. Cowan & F. A. Selim

     

     

    16. June: ELBE SAC-Meeting

    R. Krause-Rehberg et al. "... about MePS" (Link)

     

    SLOPOS-14 (Matsue, Japan)

    Conference Photo SLOPOS-14 in Matsue/Japan 2016

     

    Invited Talk: "Improvement of depth resolution of VEPAS by a sputtering technique" by R. Krause-Rehberg, M. John, R. Böttger, W. Anwand and A. Wagner

     

    Inited Talk: "Positron Annihilation Lifetime Spectroscopy at a Superconducting Electron Accelerator" by A. Wagner

     

    Poster: R. Krause-Rehberg, E. Hirschmann, A. Müller, D. Espenhahn, M. Elsayed, A. G. Attallah, C. Bluhm: A 4-PMT and 12-Spectra Digital Positron Lifetime Spectrometer

     

    RKR-Photos of SLOPOS-14 are here as ZIP-file (2.7 GB)

    Your download is too slow? I can send a DVD: Link.



    26.1.2016: Lecture "Porosimetry by Means of Positron Annihilation" (Link)
     
    2015
    Happy New Year 2016!


    Treffen deutscher Positronengruppen,
    12. & 13. November 2015, Univ. der Bundeswehr, München

     TdPG Munich 2015 (photos)
    Our contributions:
    - M. John, R. Krause-Rehberg "Improvement of Depth resolution of VEPAS Measurements by sputtering removal of the surface" (Link)
    - Eric Hirschmann, R. Krause-Rehberg "Digital PALS" (Link)



    Colloquium of 60. Birthday of Reinhard Krause-Rehberg

     60. Birthday Colloquium of RKR (photos)
    Two colloquium talks:
    - A. Wagner "Materials Research w/ Positrons at the Radiation Source ELBE" (Link)
    - D. Enke "Poren und Positronen" (Link)
    - Songtext (in German): "Lied vom geschundenen Positron" (Link) & "F-Praktikumslied" (Link)



    Workshop: Methods of Porosimetry and Applications HZDR Dresden-Rossendorf 21.-23. October 2015
    http://positron.physik.uni-halle.de/methods_of_porosity_HZDR_2015.html
    Photos as Zip File: Link

    Workshop Photo

    Poster:  S. Zieger, C. Bluhm, E. Hirschmann "R. Krause-Rehberg Porosimetry with Positrons"  (Link)


     

    ICPA-17 (Wuhan, China, 21.-25.9.2015) - Website

    • Poster: R. Krause-Rehberg, A. Müller, D. Espenhahn, A. G. Attalah, E. Hirschmann
      A 4-fold Coincidence Unit for Digital Positron Lifetime Spectrometers
      (Link to pdf)

    • Talk by M. John "Improvement of depth resolution of the positron beam spectroscopy by a sputtering technique to study photovoltaics CIGSe layers" (Link)

    • Talk by Andreas Wagner "Positron Annihilation Lifetime Spectroscopy at a Superconducting Electron Accelerator, Link (contact AW)

    • RKR's talk "History of ICPA's in Photos" (Link to pdf) I will include more photos in the future - just have a look again.

    • Summary talk of ICPA-17 by RKR and Jerry Jean (Link to pdf)

    • Photos: official conference Photo and some RKR's photos (Zip file 290 MB - I shall delete a photo? Tell me the file name...)

    Wycliffe K. Kipnusu, Mohamed Elsayed, Wilhelm Kossack, Sebastian Pawlus, Karolina Adrjanowicz, Martin Tress, Emmanuel U. Mapesa, Reinhard Krause-Rehberg, Kamil Kaminski, and Friedrich Kremer
    Confinement for More Space: A Larger Free Volume and Enhanced Glassy Dynamics of 2‑Ethyl-1-hexanol in Nanopores
    J. Phys. Chem. Lett. 2015, 6, 3708−3712

    Tutorial Talk at ICDS-2015 in Helsinki (25.7.2015)
    R. Krause-Rehberg: Positron Annihilation Spectroscopy on Defects in Semiconductors
    http://positron.physik.uni-halle.de/pdf/2015_ICDS_RKR_Positrons.pdf


    Mirror Page of ICPA-17 Website: Link
    ICPA-17 Mirror Page

    GaN-Workshop in Weigmannsdorf/Germany (1.-2.7.2015):
    invited Talk: "Study of defects in GaN by Positron Annihilation" (Link)

    PPC-11 proceedings:
    A Wagner, W Anwand, M Butterling, T E Cowan, F Fiedler, F Fritz, M Kempe, R Krause-Rehberg
    Positron-Annihilation Lifetime Spectroscopy using Electron Bremsstrahlung
    Journal of Physics: Conference Series 618 (2015) 012042

    Lecture:
    Positron Annihilation as tool in materials science (Link)

    2015 FCMN:
    2015 Frontiers of Characterization and Metrology for Nanoelectronics; Dresden/Germany April 2015; R. Krause-Rehberg: "Positron Annihilation Spectroscopy Measurements for Porosimetry" (Link)

    Deutsche Zeolith-Tagung Oldenburg 25.-27.2.2015:

    Poster: R. Krause-Rehberg "Positron Annihilation – a powerful Method for open and closed Porosimetry", Link

     

    2014

    PPC-11 (Goa, India, 9.14.11.2014) - Website

    • Talk by M. Butterling "Positronium Chemistry in Liquids - First investigations at the GiPS setup", Link

    • Talk by R. Krause-Rehberg "The MePS System at Helmholtz-Zentrum Dresden-Rossendorf and its special Capability for Positronium Lifetime Spectroscopy", Link

    • Talk by A. Wagner "Positron-Annihilation Lifetime Spectroscopy using Electron Bremsstrahlung", Link

    • Talk by N. Arutyunov "Unmanageable Defects in Proton- Irradiated Silicon: a Factual Outlook for Positron Probing", Link

    • Photos taken at PPC-11: Link (there are three sizes of the photos: just click into the middle)

    • all photos in original size as zip-file (1.3 GB!): Link

    • here I will upload some videos of folk dancing soon....

     

    PSD-14 (Kyoto / Japan, 14.-19. September 2014  (Website; Contact)

    Conference Photo PSD-14 Kyoto Japan 14.-19. September 2014 official conference photo (Link)

    • Talk given at AIST and Univ. Tsukuba, Sept. 2014 "The EPOS System (ELBE Positron Source) at Helmholtz Centre Dresden-Rossendorf and first experiments at photovoltaic CIGS layers"; Link

    • invited talk: R. Krause-Rehberg, A. Wagner "The EPOS System (ELBE Positron Source) at Helmholtz Centre Dresden-Rossendorf " (Link)

    • Poster: R. Krause-Rehberg, E. Hirschmann, A. Müller, M. Elsayed "A digital positron lifetime spectrometer"; Link

    • R. Krause-Rehberg "History of PSD / PSSD from PSD-87 to PSD-14"; Link

    • R. Krause-Rehberg, A. Wagner "Invitation to PSD-17 in Dresden-Rossendorf"; Link


    9.7.2014: Seminar Talk at Univ. Leipzig; R. Krause-Rehberg "Porosimetry by Means of Positron Annihilation"; PDF-File

    Lab-Photo taken on the occasion of Maik Butterling's PhD defense (3.7.2014)
    Positron Group Photo at Uni Halle - 3.7.2014 Here is a commented version with names (Link).

    14. Lange Nacht der Wissenschaften, Univ. Halle 2014 - The Firework
    Feuerwerk der LNdW 2014  Feuerwerk der LNdW 2014 Uni Halle

    24.4.2014: Talk "Porosimetry by Positronium Lifetime Spectroscopy"; Univ. Halle, Chemistry Department; PDF-File

    Contribution of Positron Annihilation to the DPG Meeting in Dresden (30.3.-4.4.2014) as ZIP-File

    2013

     

    SLOPOS-13 (Munich, 15.-20.9.2013, Link)

    • invited talk: R. Krause-Rehberg, M. Jungmann, W. Anwand, M. Butterling, A. Wagner, G. Staats, A. Müller, T. Cowan "Begin of user operation at MePS in Rossendorf" (Link)

    • talk: J. Cizek, M. Vlcek, F. Lukac, O. Melikhova, I. Prochazka, W. Anwand, M. Butterling, R. Krause-Rehberg "Positron annihilation in flight: experiment with slow and fast positrons" (Link)

    • Poster: Maik Butterling, Wolfgang Anwand, Thomas E. Cowan, Marco Jungmann, Christoph Keßler, Reinhard Krause-Rehberg, Gerald Staats, Andreas Wagner; Start of user operation of the Mono-energetic Positron Source MePS  

    • Conference photo and photos of RKR (Link)

     

    New Paper: N. Yu. Arutyunov, M. Elsayed, R. Krause-Rehberg, C. Kessler, V.V. Emtsev, G.A. Oganesyan and V.V. Kozlovski; Positron Probing Of Vacancy Volume Of Thermally Stable Deep Donors Produced With 15 MeV Protons In n-FZ-Si:P Crystals; Solid State Phenomena 205-206 (2014) 317-322

     

    New Paper: Witali Beichel, Yang Yu, Günter Dlubek, Reinhard Krause-Rehberg, Jürgen Pionteck, Dirk Pfefferkorn, Safak Bulut, Dana Bejan, Christian Friedrich and Ingo Krossing; Free volume in ionic liquids: A connection of experimentally accessible observables from positron annihilation lifetime spectroscopy and pressure-volume-temperature experiments with the molecular structure from X-ray diffraction data; Phys. Chem. Chem. Phys., 2013, 15 (22), 8821 - 8830

     

    New paper: M. Elsayed, R. Krause-Rehberg, B. Korff, S. Richter, and H. S. Leipner, Identification of As-vacancy complexes in Zn-diffused GaAs, J. Appl. Phys. 113 (2013) 094902

     

    February 2013: We started user operation at the MePS system at ELBE in the HZDR after 15 month of interruption (extension of ELBE hall). Here are photos of the first beam time (Link).

     

     

    2012

    Weihnachtsvorleung 2012 (Link)

     

    Talk and Poster "Positron Annihilation – A Novel Tool for Porosimetry in the nm-Range for Closed and Open-Pore Systems"; Porotec Workshop "Transport in porösen Medien"; Bad Soden am Taunus 13.-14.11 2012; PDF File of Poster and Talk

     

    Vortrag in der Ferienschule "Auf den Spuren der Elektronen": R. Krause-Rehberg "Informationsübertragung mit elektromagnetischen Wellen – von Morsezeichen bis zum Smartphone" - Link

     

    Photos of ICPA-16 are online (Link)! Download of all photos in high resolution as ZIP-File (920 MB!!).

     

    ICPA-16 Talk of Rainer W. Novotny (Uin. Giessen): "Fast inorganic scintillators - status and outlook" (Link)

     

    Our contributions for ICPA-16 (Bristol, 20.-24.8.2012):

    Talk: M. Jungmann, R. Krause-Rehberg, W. Anwand, M. Butterling, A. Wagner, and T.E. Cowan

    First experiments with the MePS System (PDF of conference paper)

    Talk: R. Krause-Rehberg - Probing defects in silicon with positrons (Colloquium for Paul Coleman)

    Summary Talk of ICPA-16: P. Mascher, R. Krause-Rehberg (to be published after ICPA)

    Poster: C. Naidoo, N.P. van der Meulen, C. Vermeulen and R. Krause-Rehberg

    The Production of 22Na Positron Sources at iTHEMBA LABS

    Poster: J. Haeberle, A. Krille, M. Jungmann, K. Kosev, A. Wagner, R. Krause-Rehberg

    Investigation of the timing behavior of fast photomultiplier tubes with short laser pulses

     

    Jens Kullmann, Dirk Enke, Stefan Thraenert, Reinhard Krause-Rehberg, Mario Beiner; Characterization of pore filling of mesoporous host systems by means of positronium annihilation lifetime spectroscopy (PALS); Optica Applicata, Vol. XLII, No. 2, 2012; PDF

     

    R. Krause-Rehberg, S. Thränert, M. Jungmann

    Nano-Scale Porosimetry by Means of Positron Annihilation

    Invited talk at Summer School IRTG 2012 "Advanced Interconnects"; Zeuthen/Germany; 23.7.2012

     

    Markus Muchow; Master Thesis - Defense; 17.7.2012; Univ. Halle

    "Präsentation der Ergebnisse zur Defektstudie an Cu(In,Ga)Se2-Schichten"

     

    We organized: Workshop on Porosimetry by Positron Annihilation; HZDR Dresden, 18. July 2012 (Homepage)

     

    Talk of R. Krause-Rehberg at Trombay Meeting on Positrons in Materials, Medicine and Industry (Positron-2012), Mumbai India, March 12.-14., 2012

     

    Talk of Prof. Akira Uedono in Halle (07-March-2012): Link

     

    We organized: "Treffen deutscher Positronengruppen 2012" (Workshop at HZDR in Rossendorf, 22.2.-1.3.2012). Our contributions are here: Link

    Happy New Year 2012!

    2011

     

    Nov. 29th:

    M. Elsayed, R. Krause-Rehberg, W. Anwand, M. Butterling, B. Korff

    Identification of defect properties by positron annihilation in Te-doped GaAs after Cu in-diffusion

    Physical Review B 84, 195208 (2011), PDF

     

    Nov. 17th: Bachelor-Themen für 2011/12 - Link

     

    Nov. 9th: Photos shown during a small party in our workshop to celebrate the first successful use of MePS at HZDR (Link)

     

    Nov. 2011: Maik Butterling et. al; "Gamma-induced Positron Spectroscopy (GiPS) at a superconducting electron linear accelerator"; Nucl. Instr. and Meth. in Phys. Res. B 269 (2011) 2623–2629 PDF

     

    2011-10-14: Opening ceremony of the new lecture hall building at Weinberg Campus (Photos)

     

    2011-10-14: R. Krause-Rehberg, Seminar Talk, Univ. Halle

    "Positron Annihilation in Materials Science"

     

    2011-10-12: Yang Yu; successful PhD Defense, Univ. Halle "Free Volume and Phase Transitions of 1-Butyl-3-Methylimidazolium Based Ionic Liquids: Positron Lifetime"

     

    2011-09-26: Successful beam time of MePS system in HZDR in September 2011(Link)
    Lifetime spectra of low-k layers measured by MePS

     

    September 2011: PPC10 contribution -Yang Yu "Investigation of Ionic Liquids by Positron Annihilation Lifetime Spectroscopy"

     

    August 2011: Contributions to PSD-11

    - Joerg Haeberle: "Preparation and Examination of 22Na2CO3 Sources for Positron Annihilation Lifetime Spectroscopy (PALS)"

    - R. Krause-Rehberg et al.: Talk about source capsules (Link)

    - C. Naidoo (iThemba Labs, Cape Town): Production of 22-Na at iThemba Labs (Link)

     

    20.7.2011: Talk of Yang Yu at University Freiburg "Investigation of Ionic Liquids by Positron Annihilation Lifetime Spectroscopy" (Link)

     

    Group photo for the leave-taking of Mohamed: 23. June 2011 (Link)

     

    2011-06-20: MePS beamtime: test of chopper (Link)
    Beam profile measured using a film

     

    2011-06-02: Beam time in begin of June 2011(Link)
    One half of the chopper system

     

    Mohamed Elsayed: "The appearance of vacancies during Cu and Zn diffusion in III-V compound semiconductors"

    PhD defense in March 2011

    Thesis as PDF

     

    R. Krause-Rehberg

    "Positron Annihilation in Metal Physics"

    2. March 2011, Institutskolloquium am Helmholtz-Zentrum Berlin, Institut fuer Angewandte Materialforschung

     

    R. Krause-Rehberg

    "Material Science by means of Positron Annihilation"

    8. February 2011, Talk at iThemba Labs, Cape Town, South Africa

    Proceedings of PSD-08 (Prague) are online (Link)

    Kicker Meeting FZD 12.1.2011- Talk of RKR (Link)


    2010

     

    K. Kosev, M. Butterling, W. Anwand, T. Cowan, A. Hartmann, K. Heidel, M. Jungmann, R. Krause-Rehberg, R. Massarczyk, K.D. Schilling, R. Schwengner, A. Wagner

    "Evaluation of a microchannel-plate PMT as a potential timing detector suitable for positron lifetime measurements"

    Nucl. Instr. & Meth. in Phys. Res. A624 (2010) 641–645

    PDF

     

     

    2010-11-11: MePS Beamtime: 2nd test of chopper (Link)
    View into open MePS beam line

     

    R. Krause-Rehberg

    "Experimental facilities: MePS at ELBE"

    19. October 2010: Talk at the Workshop on Positron Annihilation Spectroscopy; FZD Rossendorf

     

    R. Krause-Rehberg

    "Positron Annihilation Spectroscopy for Non-Destructive Testing"

    14. October 2010: Talk at SKF Engineering & Research Centre, Department of Lubrication & Metallic Materials, Nieuwegein, The Netherlands

     

    Conference "Polymer 2010" in Halle/Germany (September 2010)

    Talk of Yang Yu: "Phase Transitions in Polymers Containing Long Self-Assembled CH2 and CF2 Sequences in Their Side Chain: A Positron Lifetime Study"

    YANG YU, G. DLUBEK, R. KRAUSE-REHBERG, D. POSPIECH, D. JEHNICHEN, L. HÄUßLER, J. PIONTECK, M. Beiner, E. Hempel

    PDF-File

     

    SLOPOS-12: Magnetic Island, Australia, 2.-6. August 2010 (Link to Conference Site)

    - Group Photo

    Group Photo SLOPOS-12

    - Other photos of the event

    - Our contributions: Talk "Use of Superconducting LINACS for Positron Generation"  and Poster of Arnold

     

    PSPA-10: 39. Polish Seminar on Positron Annihilation); Kazimierz Dolny, 20-25 June 2010

    - Talk of RKR and also Photos of PSPA10

    PSPA-10 in Kazimierz Dolny 20-25 June 2010

     

    - S. Thränert, D. Enke, R. Krause-Rehberg

    "Characterisation of mesopores - Positronium lifetime measurement as a porosimetry technique"

    IMPRS Ring Lecture Summer term 2010 “Nano Science” , 20. May 2010

     

     

    - M. Elsayed; Seminar Talk at Univ. Halle, 24.3.2010

    Identification of Defects in GaAs:Te after Cu in-diffusion by Positron annihilation

     

    - R. Krause-Rehberg; Plenary Talk at the Workshop "APOSB2010 International Workshop on Advanced Positron Beam Technology for Material Science, Algiers, 15.-18.3.2010"

    "A simple design for a continuous magnetically guided positron beam – and – News from the EPOS project"

    See here the photos of the workshop: Link.

    APOSB 2010 Workshop in Algiers, March 2010


     

    - 2010-March-02: Further built-up of MePS system and test of time structure
    top view to the MePS system @ March 2010

    - R. Krause-Rehberg, G. Dollinger, W. Egger, C. Hugenschmidt, A. Wagner, T. Cowan

    Plenary Talk at the Conference SNI 2010, Berlin 24.-26.2.2010

    "Positron Annihilation in Materials Research"

    - Lecture: "Characterisation of mesopores - Positronium lifetime measurement as a porosimetry technique"

    - 2010-01-29: GiPS Beamtime - neutron activated Fe-Cr samples were measured
    GiPS Beamtime: we measured neutron activated Fe-Cr samples


    -
    Jan. 2010: Reconstruction of slow-positron beam in Halle (Link)
    Reconstruction of Halle Positron Beam


    Happy New Year 2010!!   Happy New Year 2010!

    2009

     

     

    R. Krause-Rehberg, S. Thränert

    Talk at the "Innovationsforum Nanoporöse Gläser", Leipzig 26.-27.11.2009

    "Die Positronenannihilation - eine Methode zur Porosimetrie im Nanometer-Maßstab"


     

    - 2009-October-29: Further beam time for testing the time structure at MePS and for GiPS development
    GiPS setup using NaI instead of Ge detector for coincidence

     

    - 2009-September-15: First positrons at MePS (Mono-energetic Positron Spectroscopy) @ EPOS!
    First lifetime spectrum at MePS

     

    - The EPOS Team and R. Krause-Rehberg

    The intense, pulsed positron source EPOS at the Research Centre Dresden-Rossendorf

    Contribution to the International School of Physics Enrico Fermi: Physics with many Positrons (July 2009)

    PDF File


     

    - R. Krause-Rehberg, A. Krille, K. M. Kosev
    Invited Talk at Intern. Conference on New Materials Design for the Next Generation of Performed Components - NMDT-NGPC 2009, Algiers, Algeria May 2009
    Scintillation Materials for ultra-fast Gamma Timing (PDF of invited Talk)

    Photos of this conference and Group Photo
     

    - R. Krause-Rehberg
    Talk in the Seminar Materials Research at Research Center Dresden-Rosendorf, 21.4.2009
    "Materials Research with Positrons - The EPOS Project at FZD"
     

    - R. Krause-Rehberg

    Talk at the FSI-Workshop, Jena 6.-8.4.2009

    "News of the EPOS Project at the ELBE Radiation Source in the Research Center Dresden-Rossendorf"

     

    -2009-March-4: Final preparations for initial operation of positron converter at EPOS (link)
    Pt moderator in front of electrostatic extraction lens

     

    - Arnold Krille

    Seminar Talk at Univ. Halle, 18.2.2009

    Testing and Evaluation of Scintillators


    - EPOS project in February 2009: Beam adjustment by electrons
    February 2009: Beam adjustment by electrons

    ICPA-15 (Kolkata, India) Contributions, Photos, etc.

     

    R. Krause-Rehberg, W. Anwand, G. Brauer, M. Jungmann, A. Krille, M. Butterling, R. Schwengner, T. Cowan, A. Wagner

    Plenary Lecture at "15th International Conference on Positron Annihilation - ICPA-15", Kolkata, India,, 18.-23.1.2009

    Progress of the EPOS Project: Gamma-Induced Positron Spectroscopy (GiPS)

     

    M. Butterling , M. Jungmann , A. Krille , M. Werner , E. Altstadt , W. Anwand , R. Krause-Rehberg

    Simulation studies for the positron source EPOS

    Poster at ICPA-15, Kolkata, India, Jan. 2009

     

    R. Krause-Rehberg

    Lecture at "International School on Positron Studies", Kolkata, India,, 14.-16. January 2009

    Fundamentals of positron annihilation spectroscopy and its application in semiconductors

    Juni - December 2008

                Highlights der Physik 2008 - Photo galery

              Positron Studies of Defects, 2008, Prague

    • August 2008: we are starting the beamline in the lab (photos)

    • We started the construction of the beamline in the lab ...

        

    • 2008-July-15: The electron beam went through the beam line! (photos)

              Electron beam spot at the end of the beam line...

    • 2008-July-09: We installed the electron source for easy adjustment of the magnetic beam guidance system (photos).

                Electron test source in converter chamber

    concrete screening under construction...

     

    April / May 2008

              Nicki in the hole...

    • EPOS - 2008-April-23: EPOS vacuum is now sufficiently tight for the continuation of the beam tests. First we will try with electrons, then with positrons from an old 22Na-beam source, and then we will use the diagnostics mode of ELBE (< 1% beam power of ELBE electron beam). The setup of the Pb castle has been started. (Photos)

    • EPOS - 2008-April-10: Converter chamber of EPOS-System at FZD is still leaking after additional welding (p-end=8E-7 mbar). We decided to built a new chamber from stainless steel. We will use an alloy which resists neutron activation (Alloy 1.4006 without Ni, which would form 60-Co). However, the leak of the current chamber is not so bad, so that we can continue to test the beam guidance system by electrons and positrons from a 22-Na source. Moreover, we started the wiring for the magnetic guidance and steering system. Here are the photos.

              Andreas wiring the steering coil power supplies ...

    • Miniworkshop "Die Positronenannihilation in der modernen Werkstoff-Forschung" FZD Dresden - Rossendorf, 2. April 2008 (photos)

    Jan / March 2008

               Group Photo of Halle Positron People 30-Jan-2008

    • EPOS - Jan.- March 2008: Beamdump and converter chamber at EPOS mounted for the first time (photos), welding of water pipes to beam dump (photos) and mounting of the converter chamber (photos). Further progress of the cave installation (photos) and further photos.

    Oct / Dez 2007

             .first screwing at EPOS in Cave 111b in the ELBE hall in Rossendorf in Nov 2007

    Summer 2007
    Spring 2007
    2006
  • 2009

     

    2009-Dec-07: Weihnachtsvorlesung "Fotografische Fehler – oder wie fotografiere ich den Weihnachtsmann?"; Link


     

    R. Krause-Rehberg, S. Thränert

    Talk at the "Innovationsforum Nanoporöse Gläser", Leipzig 26.-27.11.2009

    "Die Positronenannihilation - eine Methode zur Porosimetrie im Nanometer-Maßstab"


     

    - 2009-October-29: Further beam time for testing the time structure at MePS and for GiPS development
    GiPS setup using NaI instead of Ge detector for coincidence

     

    - 2009-September-15: First positrons at MePS (Mono-energetic Positron Spectroscopy) @ EPOS!
    First lifetime spectrum at MePS

     

    - The EPOS Team and R. Krause-Rehberg

    The intense, pulsed positron source EPOS at the Research Centre Dresden-Rossendorf

    Contribution to the International School of Physics Enrico Fermi: Physics with many Positrons (July 2009)

    PDF File


     

    - R. Krause-Rehberg, A. Krille, K. M. Kosev
    Invited Talk at Intern. Conference on New Materials Design for the Next Generation of Performed Components - NMDT-NGPC 2009, Algiers, Algeria May 2009
    Scintillation Materials for ultra-fast Gamma Timing (PDF of invited Talk)

    Photos of this conference and Group Photo
     

    - R. Krause-Rehberg
    Talk in the Seminar Materials Research at Research Center Dresden-Rosendorf, 21.4.2009
    "Materials Research with Positrons - The EPOS Project at FZD"
     

    - R. Krause-Rehberg

    Talk at the FSI-Workshop, Jena 6.-8.4.2009

    "News of the EPOS Project at the ELBE Radiation Source in the Research Center Dresden-Rossendorf"

     

    -2009-March-4: Final preparations for initial operation of positron converter at EPOS (link)
    Pt moderator in front of electrostatic extraction lens

     

    - Arnold Krille

    Seminar Talk at Univ. Halle, 18.2.2009

    Testing and Evaluation of Scintillators


    - EPOS project in February 2009: Beam adjustment by electrons
    February 2009: Beam adjustment by electrons

    ICPA-15 (Kolkata, India) Contributions, Photos, etc.

     

    R. Krause-Rehberg, W. Anwand, G. Brauer, M. Jungmann, A. Krille, M. Butterling, R. Schwengner, T. Cowan, A. Wagner

    Plenary Lecture at "15th International Conference on Positron Annihilation - ICPA-15", Kolkata, India,, 18.-23.1.2009

    Progress of the EPOS Project: Gamma-Induced Positron Spectroscopy (GiPS)

     

    M. Butterling , M. Jungmann , A. Krille , M. Werner , E. Altstadt , W. Anwand , R. Krause-Rehberg

    Simulation studies for the positron source EPOS

    Poster at ICPA-15, Kolkata, India, Jan. 2009

     

    R. Krause-Rehberg

    Lecture at "International School on Positron Studies", Kolkata, India,, 14.-16. January 2009

    Fundamentals of positron annihilation spectroscopy and its application in semiconductors

    Juni - December 2008

                Highlights der Physik 2008 - Photo galery

              Positron Studies of Defects, 2008, Prague

    • August 2008: we are starting the beamline in the lab (photos)

    • We started the construction of the beamline in the lab ...

        

    • 2008-July-15: The electron beam went through the beam line! (photos)

              Electron beam spot at the end of the beam line...

    • 2008-July-09: We installed the electron source for easy adjustment of the magnetic beam guidance system (photos).

                Electron test source in converter chamber

    concrete screening under construction...

     

    April / May 2008

              Nicki in the hole...

    • EPOS - 2008-April-23: EPOS vacuum is now sufficiently tight for the continuation of the beam tests. First we will try with electrons, then with positrons from an old 22Na-beam source, and then we will use the diagnostics mode of ELBE (< 1% beam power of ELBE electron beam). The setup of the Pb castle has been started. (Photos)

    • EPOS - 2008-April-10: Converter chamber of EPOS-System at FZD is still leaking after additional welding (p-end=8E-7 mbar). We decided to built a new chamber from stainless steel. We will use an alloy which resists neutron activation (Alloy 1.4006 without Ni, which would form 60-Co). However, the leak of the current chamber is not so bad, so that we can continue to test the beam guidance system by electrons and positrons from a 22-Na source. Moreover, we started the wiring for the magnetic guidance and steering system. Here are the photos.

              Andreas wiring the steering coil power supplies ...

    • Miniworkshop "Die Positronenannihilation in der modernen Werkstoff-Forschung" FZD Dresden - Rossendorf, 2. April 2008 (photos)

    Jan / March 2008

               Group Photo of Halle Positron People 30-Jan-2008

    • EPOS - Jan.- March 2008: Beamdump and converter chamber at EPOS mounted for the first time (photos), welding of water pipes to beam dump (photos) and mounting of the converter chamber (photos). Further progress of the cave installation (photos) and further photos.

    Oct / Dez 2007

             .first screwing at EPOS in Cave 111b in the ELBE hall in Rossendorf in Nov 2007

    Summer 2007
    Spring 2007
    2006

    Photos:

     

    - Here are some Photos of the new Lab during relocation (Nov 2006).

    - Photos of new Lab rooms at IZM (Interdisziplinäres Zentrum für Materialwissenschaften) (Sept. & October 2006)

    - RKR photo page

     


    Contact Information

    Head of Positron Laboratory:    Prof. Reinhard Krause-Rehberg ( Email / personal Home Page)


    Address:

    Universität Halle

    Naturwissenschaftliche Fakultät II

    Institut für Physik

    Von-Danckelmann-Platz 3

    06120 Halle / GERMANY

     

    Phone & Fax

    RKR Office: +49-345-55-25560 or 61

    RKR mobile: +49-176-43474358

    Students Lab:  +49-345-55-28502

    FAX:     +49-345-55-27158

    Email: reinhard.krause-rehberg@physik.uni-halle.de

     

    Phone numbers in the labs:

    Lifetime Lab at TGZIII: +49-345-55-28501

    Beam Lab at TGZIII: +49-345-55-28500

    Office at TGZIII: +49-345-55-28502

     

    EPOS Lab at HZDR: +49-351-260-2692

    EPOS Cave 111b: +49-351-260-3172

    EPOS office: +49-351-260-3409 / 2117

     

    Address QR Code


    last update: 03-Feb-17