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New PWI research programme at FZJ: Plasma wall interactions in nuclear environment

Status of the JULE-PSI project B. Unterberg , S. Kraus, A. Kreter, L. Scheibl and B. Schweer Institute for Energy and Climate Research - Plasma Physics Forschungszentrum Jülich , EURATOM Association D- 52425 Jülich , Germany Partner in the Trilateral Euregio Cluster.

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New PWI research programme at FZJ: Plasma wall interactions in nuclear environment

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  1. Status of the JULE-PSI projectB. Unterberg, S. Kraus, A. Kreter, L. Scheibl and B. SchweerInstitute for Energy and Climate Research - Plasma PhysicsForschungszentrumJülich, EURATOM AssociationD- 52425 Jülich, GermanyPartner in the Trilateral Euregio Cluster 2nd International Workshop on Plasma Material Interaction Facilities for Fusion Research (PMIF 2011), Forschungszentrum Jülich, Germany, September 19-21, 2011

  2. New PWI research programme at FZJ:Plasma wall interactions in nuclear environment • Complementary to ongoing PWI research on toroidal confinement devices • An integrated concept to test neutron irradiated and toxic plasma facing materials (PFMs) under high heat loads and plasma exposure in Jülich • Thermo-mechanical properties of PFMs (fatigue, shock resistance) • PWI processes (Erosion, fuel retention and dust formation)

  3. PWI with Be and neutron irradiated PFMs at FZJ - Elements of the integrated concept • A linear plasma device inside a Hot Cell (JULE-PSI) with integrated surface analysis station for toxic and activated materials (T- retention, surface composition and morphology, mainly based on laser techniques) • A non-nuclear twin outside the Hot Cells, developed from a pilot experiment (PSI-2 Jülich) • High heat load e- beam test facility inside Hot Cell (JUDITH-1 upgrade) • High heat load e- beam test facility for large components outside Hot Cell (JUDITH-2) but with Be handling capability • Hot Material Laboratory (Hot metallography, Laser profilometry, thermo physics lab, scanning electron microscopy in Hot Cell environment) • Dedicated modelling activities (ERO, B2-Eirene)

  4. JULE-PSI –integral part of the TEC programme

  5. Outline • Refurbishmentofthe Hot Material Lab • Conceptual Layout ofthe Experimental Hall andthe Hot Cell • Development oftargetanalysisandexchangechamber – prototype at PSI-2 Jülich

  6. Refurbishmentof Hot Material Lab finalized(5 Mill Euro, stimuluspackage) • New ventilationsystem(HML-3: upgrade forfuturerequirementswith JULE-PSI) • General improvementsofthebuilding (thermal insulation, fireprotection, electricalsystems) JULE-PSI lab

  7. Floor plan HML-3, groundlevel

  8. Floor plan HML-3, level 1

  9. Side view HML-3

  10. Cross section HML-3

  11. Floor plan Hot Cellfor JULE-PSI

  12. Shieldingrequirementsforhotcell • Shieldingshallbeadequatetofullyusehandlinglimits • 20 cm wall thicknessforPb • Amountsto 565 to (50000 bricks) • Material alreadyrecoveredfromdeconstructionworkat FZJ • Contacttocompaniesfordetailed design established

  13. Target analysisandexchangechamber Plasma source Target manipulator Exchange and Analysis chamber PSI-2 Jülich withtargetchamber Status of PSI-2 Jülich: cf. talkby A. Kreter

  14. Target Exchange and Analysis Chamber Valve 1 Plasma Chamber Valve 2 Turbo pumps carrier Turbo pump Target manipulator

  15. Target Exchange and Analysis Chamber Plasma chamber loading of targets observation (e.g. LIBS) Laser entrance Target manipulator Glow Discharge Optical Emission Spectroscopy → see talk by C.C. Klepper 3x support for bearings QMA (LIA)

  16. Head oftargetmanipulator cone-shapedmanipulatorhead cooling gas inlet rotatabletarget holder electricalconnections

  17. Exampleoflaserbasedsurfaceanalysis LIBS – Laser Induced Breakdown Spectroscopy

  18. Laser induced break down spectroscopyandlaserinducedablationspectroscopyatTEXTOR An ITER like coaxial observation system has been designed and procured for TEXTOR application Tangential view Target Alexander Huber, FZJ

  19. Principleset-upoflaserbasedsurfacediagnosticsat JULE-PSI

  20. Guidanceoflaser beam at JULE-PSI

  21. Guidanceoflaser beam at JULE-PSI

  22. Experimental results on laser-inducedplasmaplume Collectsthe light emittedfromtheplasmaplume Laser Direction 2.71 mm Notch filter Blocks λ: 670 – 805nm Plasma plume size 2.7 mm Plasma Life time 0.10 Biased: 2.4 volts • Plasma plumeextension3.0 mm • The laserplasmalifetime200ns Notch Filter volts FWHM approx 140 ns 0.05 time (sec) 0.00 789.0µ 789.5µ 790.0µ 790.5µ

  23. Outlook:Next stepsfor JULE-PSI • Further technicaldevelopmentatthepilotexperiment PSI-2 Jülich (cf. talkby A. Kreter) • Commissioningoftargetexchangechamber • Test ofdiskshapedcathode • Increaseofconnected power for HML-3 • Design ofvacuumchamberandmagneticfieldcoilsfor JULE-PSI, conceptdevelopment CODAC • Preparationof a siteforconstructionandtestingof JULE-PSI (outside HML)

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