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NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Laboratory of Ion Beam Analysis at NPI Vladimír Havránek Nuclear Physics Institute ASCR v.v.i,

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Presentation on theme: "NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Laboratory of Ion Beam Analysis at NPI Vladimír Havránek Nuclear Physics Institute ASCR v.v.i,"— Presentation transcript:

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2 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Laboratory of Ion Beam Analysis at NPI Vladimír Havránek Nuclear Physics Institute ASCR v.v.i, Řež u Prahy, Czech Republic

3 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Presentation outline Facilities MV Van de Graaff accelerator (since 1964) - 3 MV HVEE Tandetron accelerator (since 2005) - Activities at LWR-15 research reactor Analytical Techniques - RBS, PIXE, ERDA, PIGE, PESA, NDP, PGAA - High energy ion implantation - Ion microanalysis Applications - Material research, biology, environment, history and art, modification of materials with energetic ions, etc.

4 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Our electrostatic accelerators VdG 1964 Tandetron 2005

5 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Tandetron MC 4130 Accelerator Accelerator PIXE, PIGE Ion microprobe Ion implantation RBS, RBS-C, ERDA-TOF

6 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Interaction of MeV ions with the sample and corresponding analytical techniques Základní procesy

7 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Van de Graaff and Tandetron 4130 MC accelerators (H-Au ions with energies MeV and intensities up to several microamps) Methods and main research fields RBS, RBS-channeling, ERDA, ERDA-TOF Analyses of composition and structure of layered, nano-structured materials, hard coatings, metal- polymer composites, optoelectronics and microelectronics materials, oxidation and corrosion processes, diffusion and migration of atoms in solids, processes of self organization (e.g. metal-carbon allotropes composites) Ion microsonde 3D mapping of composition and structure of materials with lateral resolution of 1 micrometer, study of biological objects ( recently Tycho de Brahes hairs), ancient ceramics, minerals. In 2010 first experiments with ion writing PIXE, PIGE Environmental studies, mostly analyses of aerosols and micro-particles accumulated on filters Ion implantation Modification of solids (e.g. improvement of properties of selected microelectronics components), simulations of radiation degradation of materials (e.g. polymers) Devices installed on thermal neutron beam from LWR-15 research reactor Methods and main research fields Neutron depth profiling (NDP) Analyses of few light elements (He, Li, B, N..), study of diffusion processes in solids (e.g. in materials important for nuclear technologies and fusion programs), study of radiation degradation of solids (e.g. polymers), development of polymer based sensors Prompt gamma analysis (PGA) Analyses of composition of materials (e.g. analyses of boron in biological samples for Neutron capture tumor therapy). Method complementary to Neutron activation analysis.

8 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI

9 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Příklady aplikace metod PIXE a PIGE

10 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI IonEnergy [keV] Dose [at/cm 2 ]SubstrateTime to complete H x10 14 Si1h 40m H+H x10 10 Si30s H+H x10 14 Polyaniline36 m Au x10 16 Glass16 h Au x10 16 *Si2.5 h O x10 14 PEEK1 h Si x10 9 PET2 s Some examples of implanted ions * Small scan area

11 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Vyleptané treky v PET fólii, implantováno Au 20MeV 1x10^9 (spolupráce Turek ODZ)

12 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Některé příklady řešených projektů Úprava vlastností výkonových křemíkových diod pomocí implantace energetických protonů (J.Vobecký FEL-ČVUT) Implantace Au do skel, změna optických vlastností a vytváření různého stupně optické nelinearity (A.Macková) Studium latentních tracků v Si pomocí AFM (A.Ruzin Tel Aviv University) Studium vytváření tracků v polymerních materiálech po ozáření těžkými ionty (trackové detektory) (dr.Turek ODZ ÚJF) Studium vlastností a poškození polymerních materiálů (PEEK) po ozáření 2.0 MeV O2+, 3.0 MeV Si2+, 3.25MeV Cu2+ and 4.8 MeV Ag2+ V. Hnatowicz, V. Havránek, J. Bočan, A. Macková, J. Vacík, V. Švorčík, Modification of poly( ether ether ketone) by ion irradiation, Nucl. Instr. and Meth. B (2008) In print

13 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Example of TOF-ERDA spectrometer tests. Spectra of LiF (200 nm) deposited on glassy carbon. 15,4 MeV Cu6+ (Tv =2,2 MV) Start detector TOF-ERDA The TOF-ERDA spectrometer set into operation in 2006 with support and cooperation of Rossendorf group., The system consist of thin carbon foil start detector and particle energy detector, which also provides the stop time signal. In the near future the second stop detector will be add.

14 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI RBS-Channeling The RBS-Channelling setup is only equipment which was fully supplied by external vendor. It was bought from NEC company USA and recently installed at -30 deg. beam line. The target chamber is equipped with fine goniometer with five degrees of freedom (x,y,z,, ) and two charge particle detectors. Test experiments are now in progress. There is also a possibility to add additional x or -ray detector, so the PIXE or PIGE channelling experiments can be performed in future. The setup will be used for routine RBS-channelling and RBS measurements. Channeling software

15 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI 1000 Cu mesh Th inclusion 25x25 m Ion microbeam (since 2009)

16 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Microbeam target chamber Microscope Far. cup STIM PIXE RBS

17 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Two Examples of Cobalt Blue Sherds found in the Excavated Sediments from the Pool of the Royal Palace in Angkor Thom. The sherds were first irradiated with protons frontally (Van de Graaff Generator) and transversally (Microbeam) of medium thin (~2 mm) slices cut from the original pieces.

18 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI White glazeBlue glazeBodyTransition Body/Glaze Fe0.59 %0.88 %0.73 %0.43 % Co<0.02 %0.60 %<0.02 % Ca9.5 %12.0 %-4.7 % Elemental distribution maps 500x500 um K K Fe Ti Ca SiCo

19 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Comparison of Spatial Distributions for Co, Fe and Ca

20 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Cobalt inclusion – detail (maps 25x25 um for Fe, Co and As) As Co GUPIX fit of a cobalt inclusion defined as a region of interest Elemental ratios As/Co (0.6%) Fe/Co (1.7%)

21 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI SPATIAL WINDOW CONTAING A BRAIN SAMPLE IRRADIATED WITH PROTON BEAM EXAMPLES OF A SAMPLES HOLDER WITH MOUNTED CEREBELLUM BRAIN SLICES AND LIGHT MICROSCOPE IMAGES THEREOF SAMPLE HOLDER WITH MOUNTED BRAIN SLICES A LIGHT MICROSCOPE IMAGE OF THE CENTRAL PART OF THE CEREBELLUM SECTION SCANNED WITH THE PROTON BEAM.

22 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Fe S Ca Ni Zn Cu

23 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Oxidation of zirconium

24 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI 1.8 MeV protons ) 18O a18O b 18O a Zr RBS Zr PIXE Si Fe

25 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Ion beam writing (hammering) using MeV focused beam of C, O a Si into layer of PDMS (Polydimethylsiloxane) SPATIAL WINDOW CONTAING A BRAIN SAMPLE IRRADIATED WITH PROTON BEAM EXAMPLES OF A SAMPLES HOLDER WITH MOUNTED CEREBELLUM BRAIN SLICES AND LIGHT MICROSCOPE IMAGES THEREOF SAMPLE HOLDER WITH MOUNTED BRAIN SLICES A LIGHT MICROSCOPE IMAGE OF THE CENTRAL PART OF THE CEREBELLUM SECTION SCANNED WITH THE PROTON BEAM. In cooperation with Dr. Istvan Rajta, Atomki Debrecen, HAS

26 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI LVR15 HCH-3 LVR-15 nuclear reactor REZ neutron guide RESEARCH REACTOR LVR-15 LVR-15 IS LIGHT-WATER MODERATED AND COOLED TANK NUCLEAR REACTOR WITH FORCE COOLING. THE FUEL IRT-2M IS ENRICHED TO 36%, COMBINED WATER-BERYLLIUM REFLECTOR IS USED. MAIN CHARACTERISTICS: Maximum reactor power 10 MW Maximum thermal neutron flux in the core 1.5 x n/m 2 s Maximum fast neutron flux in the core 3 x n/m 2 s Thermal neutron flux at the end of the beam tube 1 x n/m 2 s Thermal neutron flux in irradiation channel in fuel 1.2 x n/m 2 Thermal neutron flux in irradiation channel in reflector 9 x n/m 2 s

27 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Thermal neutron guide tube and TNDP chambers HCH-3 TNDP CHAMBERS neutron guide LVR-15 reactor hall

28 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI List of the NDP relevant isotopes Basic reaction characteristics of the NDP relevant isotopes, and detection sensitivities for the NDP single- detector spectro- meter in the NPI Rez. Detection limits are based on the charged particle counting rate 0.01 s -1, detector -sample solid angle 0.03 Sr, and intensity of the neutron beam th = 10 7 cm -2 s -1.

29 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Principles od NDP (Neutron Depth Profiling)

30 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Principal scheme of the detector-target-detector coincidence set-up Coincidence NDP

31 NuPECC Prague 2011 PGAA (Prompt Gamma Activation Analysis) facility Instrument parameters Installed at LVR-15 reactor Beam 25x7 mm 2 Detector HPGe (25%) Sensitivity 3.7 counts/s / g 10 B Sample liquid/powder in 0.5 ml teflon vial Usage: Analytical method PGAA - concentration of isotopes/elements (B, Cd, Sm, Gd, H, Cl, …) - optimized for liquid (powder) samples - biological samples (study of pharmacokinetics of boron compounds in the framework of BNCT) - minerals Neutron flux 3x10 6 n cm -2 s -1 Det. limits ~ 0.1 g (B,Sm,Gd) ~ 50 g (H)

32 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Geologické aplikace – zirkonové zrno v safíru

33 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI

34 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Fit parameters Resolution [ m] Ampli de A Step position σ50% qv. beam FWH M Row left Row right Col top Col bottom Test rozlišení na Mřížce Cu 1000 v analytickém vysokoproudém režimu Pro metody PIXE a RBS Objektové clony 20 m x 80 m, kolimační clony 80 m x 800 m proud 50pA

35 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Fit parameters Resolution [ m] Ampli de A Step positio n σ50% qv. beam FWH M Row left Row right Col top Col bottom Test rozlišení na Mřížce Cu 2000 v nízkoproudém tansmisním režimu Pro metody ON axis STIM a OFF axis STIM Objektové clony téměř zavřené, kolimační clony 100 m x 100 m proud 5000 protonů/s

36 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Analýza kráteru po laserové ablaci

37 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Thanks to my colleaques from the laboratory Vladimír Hnatowicz, Anna Macková Vratislav Peřina, Jiří Vacík, Vasil Lavrentiev Karel Kranda, Ivo Tomandl Václav Voseček, Jiří Novotný Václav Kučírek Vladimír Semián, Pavel Plocek Václav Klíma Petr Malinský, Romana Mikšová

38 NuPECC Prague 2011 V.Havránek Laboratory of IBA at NPI Dekuji za pozornost ! Thank you for your attention !


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