R. Krause-Rehberg • Statistics • Intense Positron Sources (Reactor & LINAC) • Defects • Spin-resolved experiments • Surfaces and Interfaces • Technical Developments

P. Mascher • Theory, Simulations, Software • Anti-Hydrogen • Positronium • Bio- and Nanomaterials • New Trends

1

Group Photo ICPA-16

1965 ICPA-1 Detroit, USA 1971 ICPA-2 Kingston, Canada 1973 ICPA-3 Otaniemi, Finland 1976 ICPA-4 Helsingor, Denmark 1979 ICPA-5 Lake Yamanaka, Japan 1982 ICPA-6 Arlington, USA 1985 ICPA-7 New Delhi, India 1988 ICPA-8 Gent, Belgium 1991 ICPA-9 Szombathely, Hungary 1994 ICPA-10 Beijing, PR China 1997 ICPA-11 Kansas City, USA 2000 ICPA-12 Munich, Germany 2003 ICPA-13 Kyoto, Japan 2006 ICPA-14 Hamilton, Canada 2009 ICPA-15 Kolkata, India 2012 ICPA-16 Bristol, UK 2015 ICPA-17 Wuhan, China

Some statistics: • ≈ 200 Participants • 160 contributing participants • 96 talks • among them 37 invited talks • 72 Posters • Contributions from 29 countries (acc. to presenting author)

Country Contributions

Japan 32

UK 24

Germany 20

China 15

France 9

USA 8

India 7

Australia Czeck Rep. Finland Slovakia

6

Italia Poland Russia

4

Country Contributions

Austria Egypt

3

Portugal Serbia Spain Vietnam

2

Argentina Belgium Brazil Canada Chile Denmark Israel Sweden Uzbekistan

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Field Number

of Talks

Technical developments 22

Positronium 6

21 Polymers/Softmatter/IL’s 10

Membranes / Porosimetry 5

Metals 6 16

Reactor-based Materials 10

Semiconductors 8

Nano-Structures 7

Surfaces / Interfaces 7

Li-Battery and Fuel Cells 2

Bio-Materials 3

Anti-Hydrogen 3

Spin-resolved exp. / Magnetic Structures 3

Theory 5 9

Software / Siumulations 4

Others 2

Where What Linac Reactor Status Remarks

Munich Germany

NEPOMUC @ FRMII x

Paused; new source installed

Experiments start probably in 01/2013 again

Delft / NL POSH x in Operation 2D-ACAR; 4×108 e+/s

AIST / Tsukuba Japan

slow LINAC x

in Operation sc-LINAC planned

KEK / Tsukuba Japan

slow Linac x

in Operation several facilities

Osaka Univ. Japan

slow Linac x

constructed, no use until now

100 MeV Linac

HZDR in Dresden Germany

EPOS (MePS and GiPS)

x

Paused due to extension of hall

sc-LINAC; new experiments in 01/2013 MePS: 2x104 cps @ 600W instead of 40 kW

Where What Linac Reactor Status Remarks

Hamilton Canada

Research Reactor x

under planning / construction

budget received; first e+ in 2013 expected 3 MW

IHEP China

BEPC Linac

x planned 1.9 GeV

Saclay France

GBAR Experiment x

in operation 4.3 MeV, 50 µA >3x106 slow e+/s Table top LINAC

UNC, US North Carolina

PULSTAR Reactor

x in use > 109 e+/s; 1 MW

industrial applications

Kyoto Univ.. Japan

KUR (Kyoto Univ. Reactor)

x planned budget received; heavy

water reactor (Dr. Nagai)

• Egger: the development of PLEPS at NEPOMUC • Löwe: digital pixelated Ge detector • Wagner: 3D-PALS Tomography at GiPS (EPOS system) • Anwand: flash-lamp annealing's of W-moderators • Krause-Rehberg: first experiments at MePS (EPOS system) • Zhou: humidity controlled atmospheric PPMA (positron probe microanalyzer) • Kawasuso: Spintronics with polarized positrons; ΔR parameter of DBS • Wei: positron research in IHEP; Ps-TOF and other beams; TOF-PET • Mascher: McMaster reactor-based e+ source • Fujinami & Oshima: e+ micro-analyzers • O’Rourke: new positron beamline at AIST; sc-LINAC with high duty entirely for e+

• Ceeh: new 2D-ACAR setup at FRM-II • Weber: new e+ storage system • Wada: new e+ experiment station at KEK • Digital CDBS system • Novotny: fast inorganic scintillators

Metals • Cizek & Puff: SPD of steel by HPT; UFG materials • Badawi: 6063 & 6066 Al alloy; relationship Lifetime HV • Anastasopol: H-storage in Mg-Ti; metal-to-hydride transmission by 2D-ACAR • Lukáč: vacancy-induced hardening in Fe-Al; L+ measurements for saturated trapping • Mostafa: deformed Fe-Si steel; 650°C vacancy clusters annealing

Reactor-Based Materials • Nagai: role of matrix defects in RPV steels • Amarendra: deformed Eurofer Fe-Cr (9%); role of dislocation • Slugen: p- and n-irradiation of western and eastern RPV steels • Toyama: Zr-Nb for future cladding tube material • Wu: H+ and Fe+ implantation in Chinese RVP steels and Fe-Cu • Cao: Cu precipitates in Fe-Cu; Fe+ irrad. 0.1 and 1.2 dpa • Barthe: heavy ion implantation in UO2; damage of pellets; annealing of defects • Caravallo: Fe-Cr (9%) He+ irradiation; DB & TDS; defect annealing • Sojak: Fe-Cr (2.4….11.6 %); He+ irradiation; PALS; annealing • Veternikova: ODS steel for Gen. IV fission steel; α irradiation (Fe-Cr + Y2O3)

• p-irradiated in 1b diamond • Barthe: irradiated SiC; interaction with He • Zhang: PA in Silicon • Uedono: Gas cluster implantation; e+ for FEOL and BEOL processes; CMOS interesting • Knights: history of beam Technique; Appl. for implantation and Si photonics • Sullivan: new beam for Ge & Si studies; PALS with 1st Point Beam; impl. samples; voids • Tuomisto: review of application of e+ in semiconductor studies in Helsinki • Keeble: vacancies in SrTiO3

• Prochazka: Ziconia

• Parz: carging LiCoO2 CoO2; only 50% of Li can be used; VLi is formed up to 2.5% • Honda: degradation of Fuel Cell membranes • Ferragut: interface in polymer-oxide solar cells

• Rempel: nano-PbS • Nambissan: Nano-sulfide and oxide-semiconductors (CdS, FeS2, ZnS, CdO, ZnO, CeO …) • Ganguly: ZnO nano-particles • Pujari: phase transition studies in nanodroplets • Roussenova: biopolymers

• Weiss: PAES at Ag(100) surface • Fazleev: PAES of oxidized Cu(100) • Reiner: interdiffusion at Au-Cu interface • Edwardson: Si quantum well interfaces • Sudarshan: e+ re-emission from W(100) • Terabe: Ps emission from Na-coated W-surface • Rätzke: free volume at polymer-solid interfaces; aging studies • Fukaya: top-most surface sensitivity by Reflection High-energy positron diffraction

• Gribakin – e+ annihilation with atomic core electrons • Barbiellini – cuprate superconductors • Boyle – e+ transport in soft-condensed systems (PET) • Kuriplach: geometrical considerations • Makkonen: enhancements effects of momentum densities

• Brawley – Overview of UCL efforts re scattering cross-sections • Cassidy – experiments with intense bursts of e+ • Danielson – e+/molecule binding energies

Scattering Experiments, Positron-Atom Interactions

Positronium Formation and Fundamentals

• Maurer – formation probabilities in polymers • Kobayashi – e+ and Ps chemistry • Nagashima – photodetachment of Ps-

• Inoue – Ps self-trapping in alkaline fluorides • Zaleski – mesopores • Chen – porous crystals • He – mesoporous thin films • Miyazaki – Ps hyperfine splitting • Hirade – Ps bubble formation • Hyodo – simple model to determine pore size from PALS

• ALPHA Collaboration: Madsen (overview), Charlton (resonant MW transitions in magnetically trapped anti-H),

• GBAR Experiment: Liszkay (high density Ps cloud), Comini (production cross-

sections)

• Aegis Experiment: Mariazzi (Ps cooling),

• Ito – selectivity issues for water purification • Shimazu – permeation behaviour of reverse osmosis membranes • Honda – degradation of fuell cell membranes • Ferragut – polymer-oxide hybrid solar cells

Membranes

Emission of correlated e+/e- pairs (Schumann) Spintronics (Kawasuso)