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M. von Hellermann

Progress and Status of Active Beam Spectroscopy for ITER Manfred von Hellermann 10th ITPA diagnostic Meeting Kurchatov, Moscow, TRINTI Troitsk April 10 -14, 2006. M. von Hellermann. Acknowledgements FOM / FZJ : Serge Brons, Roger Jaspers,

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M. von Hellermann

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  1. Progress and Status of Active Beam Spectroscopy for ITER Manfred von Hellermann 10th ITPA diagnostic Meeting Kurchatov, Moscow, TRINTI Troitsk April 10 -14, 2006 M. von Hellermann

  2. Acknowledgements FOM / FZJ : Serge Brons, Roger Jaspers, Olaf Neubauer, Andrey Litnovsky, Michael Pap ITER/ IT: Chris Walker, Christian Ingesson, Robin Barnsley, George Vayakis Kurchatov: Alexey Gorshkov, Konstantin Vukolov TNO: Willem Vliegenthart, Kees Moddemeijer TRINITI: Sergei Tugarinov UKAEA : Nick Hawkes, Bob Walton, Cliff Marren M. von Hellermann

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  4. Performance Review DNB Issues Periscope development Radial overlap issues Port swap Mirror development Maintenance Issues CXRS Pilot Experiment on Textor Shared Software Development (EU,RF,US) M. von Hellermann

  5. Performance Studies reviewed….. EU EFDA contracts 2005 EU/RF CXRS Meeting 2005 Shared Pilot Experiment 2006 M. von Hellermann

  6. Performance requirements • 1) signal-to-noise • a) detection efficiency and instrumentation • b) energy dependence for beam stopping and • emission rates • 2) spatial resolution • a)measurement requirement table • b)overlap of upper and equatorial port views • c) magnetic field measurements • 3) minimisation of blanket cuts • a) neutron reduction • b) steerability M. von Hellermann

  7. plasmaAplasma= spectrometerAspectrometer M. von Hellermann

  8. CX spectral intensity M. von Hellermann

  9. Approximation of Gaussian DNB profile M. von Hellermann

  10. To: P.L.Mondino, E.Di Pietro, T.Inoue, A.Costley, V.Mukhovatov From: A.Panasenkov Date: October 27, 1999 Peak current density 60mA/cm^2 M. von Hellermann

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  12. Radial Resolution Need for Upper and Equatorial periscopes Poloidal and Toroidal Velocity Measurements M. von Hellermann

  13. Radial Resolution for U-ports 2 and 3 a/20 Upper Port 2 a/30 Upper Port 3 M. von Hellermann

  14. Radial Resolution for Upper and Equatorial Port M. von Hellermann

  15. Beam Issues…… Beam divergence Modulation ?? Duty Cycle Maintenance Blanket Cut M. von Hellermann

  16. Neutral beam stopping cross-sections M. von Hellermann

  17. Tilted DNB aimed at magnetic axis Can blanket cut be reduced without loss of performance ?

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  20. Port plug allocation Reference plug : Upper port 3 Alternative plug : Upper port 2 M. von Hellermann

  21. Port 3 Port 2 Serge Brons, FZJ Alexey Gorshkov, Kurchatov 2 legged optics and separate pipe with first mirror and shutter M. von Hellermann

  22. Port plug 2 Port plug 3 Intersections of lines-of-sight with blanket structure M. von Hellermann

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  24. Retractable 3-pipe concept M. von Hellermann

  25. Deflection Analysis FZJ Michael Pap Graphical representation of the deflection in meters of the whole unit . The centre of the mirror is bend upward. M. von Hellermann

  26. OPTICS Recent studies at TNO Delft Willem Vliegenthart Kees Modemeijer M. von Hellermann

  27. Alternative Cassegrain configuration Imaging of entire DNB path 0<r/a<1 Courtesy TNO M. von Hellermann

  28. Cassegrain optics with improved Imaging qualities TNO 2005, Willem Vliegenthart M. von Hellermann

  29. Proposed arrangement of fibre head 24 radial channels along DNB 5 fibres across (2w) Core region: 15 channels high resolution (<a/30) Outer region: 9 channels low resolution(<a/20) M. von Hellermann

  30. Inverse imaging of central 1mm fibre onto DNB, box scale 50 mm, preliminary design, courtesy TNO M. von Hellermann

  31. Alignment issues • Pre-alignment in assembly phase • Alignment by rotation of mirror tubes • Fine-alignment by fibre-holder adjustments • Alignment control • Radial positions by BES Doppler shifts • Height and angle with respect to DNB • a) In vessel inspection (TV cameras) • b) Use of 2-dim fibre array and maximisation • of BES signal M. von Hellermann

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  35. Measuring Capabilities of ITER Core CXRS M. von Hellermann

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  37. MSE M. von Hellermann

  38. Uport 2 M. von Hellermann

  39. Port 2 Port 3 M. von Hellermann

  40. Upper port 2 Upper port 3 M. von Hellermann

  41. Uport 2 M. von Hellermann

  42. ITER CXRS PILOT EU:Roger Jaspers & Manfred von Hellermann RF: Sergei Tugarinov

  43. Pilote Experiment on TEXTOR

  44. High Throughput: F/3 High Resolution: 2.5 Å/mm TRINITI Spectrometer, S.Tugarinov M. von Hellermann

  45. Aims • Optimisation of spectral instruments and detectors • Sensitivity study for MSE and ratiometry for top port

  46. Aims • Optimisation of spectral instruments and detectors • Sensitivity study for MSE and ratiometry for top port • Multi-tasking set-up: MSE/BES/CXRS-D/He/C CXRS: Ti , vpol,vtor, nz*nb BES: nb, Pdep, MSE ( Bt, Bpol, q , Rmeas, Er.) No absolute calibrations!!!! No absolute calibrations!!!! No absolute calibrations!!!! No absolute calibrations!!!! No absolute calibrations!!!! No absolute calibrations!!!!

  47. Summary Review of first mirror position, mirror material, Mirror heating and cooling Allocation of CXRS/BES Upper port Review of optics Specification of fibre link Desired overlap of Core and Edge CXRS Use of beam emission spectroscopy Radial resolution and incremental scans Alignment procedures Magnetics :Total magnetic fields , pitch angles M. von Hellermann

  48. Summary, continued Measuring capability Instrumentation Pilote experiment on TEXTOR M. von Hellermann

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