Review of spectroscopic diagnostic at COMPASS tokamak

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Presentation transcript:

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 100 m vysoko, metru za sekundu. ADAS Workshop 2012 / 23 – 25 September 2012

Spectroscopic diagnostic 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 100 m vysoko, metru za sekundu. 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 01

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) 100 m vysoko, metru za sekundu. 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 01

Spectroscopic diagnostic 100 m vysoko, metru za sekundu. 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 02

Thomson scattering Nd:YAG (1.5 J, 30 Hz, 1064nm) Spatial resolution: Tokamak vesel Laser edge & core collection optics beam dump Fast digitizers Optical fibers bundle Polychromator 100 m vysoko, metru za sekundu. Detectors (Avalanche Photodiodes) Spatial resolution: Central ~10mm Edge ~4mm Optical delay line 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 03

Fast VIS camera Cypress LUPA-1300 CMOS sensor Resolution: 1280 x 1024 Speed: 541 frames/sec 100 m vysoko, metru za sekundu. In collaboration with KFKI-RMKI and SIU EURATOM/HAS 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 02

Fast VIS camera Separatrix Cypress LUPA-1300 CMOS sensor Resolution: 1280 x 1024 Speed: 541 frames/sec 100 m vysoko, metru za sekundu. In collaboration with KFKI-RMKI and SIU EURATOM/HAS 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 02

Plasma rotation Resolution 0.004nm Range ~8nm Readout rate <10MHz 100 m vysoko, metru za sekundu. Resolution 0.004nm Range ~8nm Readout rate <10MHz QE >90% In collaboration with IPP, EURATOM/IST 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 02

Tomographic system AXUV photodiodes (bolometers) 100 m vysoko, metru za sekundu. AXUV photodiodes (bolometers) temporal resolution 1MHz spectral range: 7eV – 6 keV Photodiodes (windowless) temporal resolution 1MHz spectral range: 0.5 (Be foil) – 10 keV 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 02

Visible light measurements two angular port plugs interference filters (line selection/Zeff) with FWHM of 10 nm / 2 nm optical fibers (high OH silica) of diameter 200 mm, length ~20 m photomultipliers / two photodiode arrays (35 channels, 1 ms) 100 m vysoko, metru za sekundu. 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 02

Minispectrometers 100 m vysoko, metru za sekundu. 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 02

Minispectrometers 100 m vysoko, metru za sekundu. 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 02

Spectroscopic diagnostic ~523nm ~5 mV noise C III H a bremsstrahlung All VIS 100 m vysoko, metru za sekundu. 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 02

Impurities influx and concentration L-H transition Pedestal parameters Summary Plasma rotation Zeff Impurities influx and concentration L-H transition Pedestal parameters Charge exchange spectroscopy IR camera 100 m vysoko, metru za sekundu. 03/12/2018 Review of spectroscopic diagnostic at COMPASS tokamak / ADAS Workshop 2012 / 23 – 25 September 2012 02