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Applications of ADAS to ITER Diagnostics

Applications of ADAS to ITER Diagnostics. Robin Barnsley and ITER Diagnostics Division Martin O’Mullane, Strathclyde University ADAS Workshop, Cadarache , 24-25 September 2012. Overview of spectroscopic diagnostics ADAS-based emission modelling for x-ray camera. R (m). 6.2. a (m).

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Applications of ADAS to ITER Diagnostics

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  1. Applications of ADAS to ITER Diagnostics Robin Barnsley and ITER Diagnostics Division Martin O’Mullane, Strathclyde University ADAS Workshop, Cadarache, 24-25 September 2012 • Overview of spectroscopic diagnostics • ADAS-based emission modelling for x-ray camera ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  2. R (m) 6.2 a (m) 2 VP (m3) 850 IP (MA) 15(17) Bt (T) 5.3 d,k 1.85, 0.5 Paux (MW) 40-90 Pa (MW) 80+ Q (Pfus/Pin) 10 Pfus(MW) 500 • ITER (www.iter.org) • Superconducting Tokamak • Single-null divertor • Elongated, triangular plasma • Additional heating from RF, and negative-ion neutral-beams ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  3. ITER cross-section ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  4. ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  5. ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  6. Overview of diagnostic locations ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  7. ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  8. From the 2006 ADAS Workshop, Abingdon ADAS-SANCO modelled ITER broadband x-ray spectra Line and continuum in 5% energy bands, radially resolved < 10 keV: mainly impurity information > 10 keV: mainly Te information Modern detectors will be able measure this… ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  9. Advances in detector technology enable new measurement capabilityCERN-led Medipix 3 – in development Active pixel detector - Each pixel has analog pulse processing, thresholds, and digital counter • 256 x 256 array. Pixels 55 um square - Multiple enrgy windows • 1 us pulse-process time per pixel - Radiation-hard to ~1014 neutron/cm2 Diagnostic applications • X-ray spectroscopy and imaging - Particle detection and spectroscopy • Fast visible and VUV framing (with MCP) • Neutron and gamma spectroscopy

  10. 2007 Diagnostic Review Radial X-ray Camera added to ITER In-port cameras where necessary Seconday vacuum Removable cassette Ex-port cameras where possible Detectors Slits Be window Valve Detectors Be windows Slits ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  11. Diagnostic design process Physics study, emission modelling etc: ADAS-SANCO Conceptual system design Signal and noise modelling: Neutronics Assess derived measurements relative to the requirements Conceptual design review Detail design > review Manufacturing design > review Manufacture, installation, commissioning, operation etc

  12. ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  13. ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  14. ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  15. ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  16. ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  17. Diagnostic shield module DSM Port-plug Port-plug rear flange Diagnostic first wall DFW In-port detectors Secondary vacuum tube Ex-port detectors ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  18. Separate slots for each camera module – big improvement in neutronics- practical DFW slots

  19. Comparison of Total DT neutron Flux S Jakhar Initial Model Improved Model 1.72×108 n/cm2/s 1.3×1010 n/cm2/s

  20. Survey & Divertor VUV CDR, Introduction, R Barnsley April 20 2011

  21. Core VUV – 5-channel VUV spectrometer Grazing Incidence Angle: 4~40 degree (depend on channels) Spectral Range: 2.4 nm < λ < 160 nm Resolution ~100 < λ/dλ < ~700

  22. 5-channel Main Plasma Survey Spectrometers, with shielding concept for MCNP analysis To plasma Collimating mirrors Slits Spectrometers Detectors Shielding Survey & Divertor VUV CDR, Introduction, R Barnsley April 20 2011

  23. ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  24. ADAS Workshop, Cadarache, 25 September 2012, R Barnsley

  25. KSTAR VUV Spectrometer Test 2012 Campaign (F-Port) CR Seon, MS Cheon, S Pak & HG Lee • Spectrometer table on the F-port deck • 3 m - long Vacuum Extension Tube • Two Gate Valves • One Bellows • Collimation Mirror Set • 1. Cylindrical 10 cm x 5 cm, R.O.C. = 13.5 cm • 2. Convex 10 cm x 5 cm, R.O.C. = 700 cm VUV spectrometer on the optical table Vacuum extension 87 deg. 25

  26. First Measurement of KSTAR Plasma Impurity Fe XVI • Impurity lines of initial plasmas at KSTAR 2012 Campaign (2012. 09. 06) Fe XVI He II C III C IV O VI O VI Fe XV He II Metal Lines 26

  27. Summary ADAS-based plasma emission modelling is essential for the physics basis of diagnostic system design. Currently ITER is updating the modelling in support of the system conceptual design reviews (CDR) Passive spectroscopy almost complete – only core x-ray remains First prototype in operation – VUV survey The need for update and expansion of the modelling will continue through the detail design phase into operations

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