HT-7 diagnostics
In the autumn of 2001, the HT-7 facility implemented various electro-magnetic diagnostics, including Mirnov coils for MHD analysis and magnetic probe arrays for internal inductance measurements. The research focused on electron density and temperature using five-channel HCN laser interferometry, Langmuir probes, and ECE techniques. Notably, soft-X-ray detectors monitored fluctuations and radiative power. The extensive diagnostic setup involved multiple types of monochromators, bolometers, and spectroscopic tools, aiming to gather detailed profiles of plasma parameters like Zeff, impurity levels, and Ha emission.
HT-7 diagnostics
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Presentation Transcript
HT-7 diagnostics Autumn of year 2001
Electro-magnetic • Standard measurements: Ip, Vp, position etc. • MHD: Mirnov coils • Diamagnetic: W, E • Internal inductance. Magnetic probe array • HT-7U R&D
Electron density/temperature • 5 channel HCN laser interferometer • Langmuir probes (edge) • FSECE • ECE(FRC) • Soft-X ray PHA (3 channels) • TS • NPA (Ti)
Fluctuation • Langmuir probes • Fast Ha array • CO2 laser scattering • Omegatron • Fast magnetic probes • Soft-X array • FRC-ECE
Impurity • 10 channel visible monochromator • 7 channels vis-bremsstrahlung • 2 rotating mirror (UV) monochromators • 2 monochromators (OII, OV) • Two UV-VIS OSMA • IF periscope (LiI) • Omegatron
Edge • Spectroscopy • Langmuir probes • Omegatron • Ha array
Emission • 16 channels AXUV (bolometer-like) • 2 channels AXUV (total radiative power) • 2*43 XUV arrays • 2*37 SX arrays • 7 chs (H), 11chs (V), 4chs (T) HX monitor and PHA • 2 chs neutron monitor
Which one can provide profiles • Electron density (HCN, LP) • Electron temperature (FSECE, FRC-ECE, TS, SXS) • Ion temperature (shot by shot up to 2 2? cm) • Radiative power (AXUV array) • Zeff and impurity, and Ha emission • fe(Ve) by HX (V) array • SX emission
