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Review of spectroscopic diagnostic at COMPASS tokamak

Review of spectroscopic diagnostic at COMPASS tokamak. Presented by Diana Naydenkova Institute of Plasma Physics AS CR, v.v.i., Association EURATOM/IPP.CR Za Slovankou 3, 182 00 Prague 8 Thanks for contributions to COMPASS team & collaborators. ADAS Workshop 2012 / 23 – 25 September 2012.

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Review of spectroscopic diagnostic at COMPASS tokamak

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  1. Review of spectroscopic diagnostic at COMPASS tokamak Presented by Diana Naydenkova Institute of Plasma Physics AS CR, v.v.i., Association EURATOM/IPP.CR Za Slovankou 3, 182 00 Prague 8 Thanks for contributions to COMPASS team & collaborators ADAS Workshop 2012/23 – 25 September 2012

  2. Outline • COMPASS tokamak • Spectroscopic diagnostic • Thomson scattering • Two fast VIS cameras • Plasma rotation • Bolometry • Soft X-rays • Visible light detection • Spectrometer for VIS and UV • Bremsstrahlung • Summary Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 01

  3. COMPASS tokamak Major radius[m] 0.56 Minor radius [m] 0.23 x 0.38 Plasma current [kA] <180 (400) Magnetic field [T] <1.8 (2.1) Triangularity ~ 0.5 Elongation ~ 1.6 Pulse length [s] < 0.3 (0.5) Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 01

  4. Spectroscopic diagnostic Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 02

  5. Laser Tokamak vesel edge & core collection optics beam dump Thomson scattering Nd:YAG (1.5 J, 30 Hz, 1064nm) Fast digitizers Optical fibers bundle Polychromator Detectors (Avalanche Photodiodes) • Spatial resolution: • Central ~10mm • Edge ~4mm Optical delay line Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 03

  6. Fast VIS camera Cypress LUPA-1300 CMOS sensor Resolution: 1280 x 1024 Speed: 541 frames/sec In collaboration with KFKI-RMKI and SIU EURATOM/HAS Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 02

  7. Fast VIS camera Separatrix Cypress LUPA-1300 CMOS sensor Resolution: 1280 x 1024 Speed: 541 frames/sec In collaboration with KFKI-RMKI and SIU EURATOM/HAS Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 02

  8. Plasma rotation Resolution 0.004nm Range ~8nm Readout rate <10MHz QE >90% In collaboration with IPP, EURATOM/IST Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 02

  9. Tomographic system AXUV photodiodes (bolometers) temporal resolution 1MHz spectral range: 7eV – 6 keV Photodiodes (windowless) temporal resolution 1MHz spectral range: 0.5 (Be foil) – 10 keV Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 02

  10. Visible light measurements • two angular port plugs • interference filters(line selection/Zeff) with FWHM of 10 nm/2nm • optical fibers (high OH silica) of diameter200mm, length~20 m • photomultipliers /two photodiode arrays (35 channels, 1ms) Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 02

  11. Minispectrometers Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 02

  12. Minispectrometers Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 02

  13. Spectroscopic diagnostic ~523nm ~5 mV noise C III H a bremsstrahlung All VIS Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 02

  14. Summary • Plasma rotation • Zeff • Impurities influx and concentration • L-H transition • Pedestal parameters • Charge exchange spectroscopy • IR camera Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012/23 – 25 September 2012 02

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