Conveners
Diagnostics
- Hans Oosterbeek (Max-Planck-Institute for Plasma Physics, Greifswald, D-17491, Germany)
Diagnostics
- Max Austin (Univ. of Texas)
Diagnostics
- Gary Taylor (PPPL)
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Zhoujun Yang22/06/2022, 09:00Invited
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Tokihiko Tokuzawa (National Institute for Fusion Science)22/06/2022, 09:30Oral
ECE diagnostics have been used since the beginning of LHD experiments, and now two new ECE systems, both systems cover in Q-band and V-band, have been installed to meet the demand for information on electron temperature fluctuations in low magnetic field strength experiments.
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One is a conventional radiometer. The existing radiometer is optimized for high frequencies, so a new... -
Dr Hailin Zhao22/06/2022, 09:50Oral
The electron cyclotron emission (ECE) diagnostic on the experimental advanced superconducting tokamak (EAST) has a major upgrade since 2020, when EAST heating system also went through a huge upgrade, including the one NBI system was changed from counter-current to Co-current (moving from port F to port D), and the antenna and the installation port of LHW and ICRF system have also been changed....
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Christian Yoo (Massachusetts Institute of Technology)22/06/2022, 10:10Oral
Turbulent transport is generally found to determine energy and particle confinement times in tokamaks. The correlation electron cyclotron emission (CECE) diagnostic installed on the ASDEX Upgrade (AUG) tokamak measures broadband, long-wavelength ($k_{\theta}$$\rho_{s}$ < 0.3) electron temperature fluctuations [1], yielding insight into turbulence-driven transport. Analysis of CECE data is...
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Tema Biwole Arsene Stephane (EPFL)22/06/2022, 11:00Invited
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Matteo Fontana (EPFL)22/06/2022, 11:30Oral
Accurate and consistent measurements of the electron temperature (Te) profile are paramount for current fusion experiments, like JET, and future devices, such as ITER. In high performance plasmas in JET and TFTR, electron cyclotron emission (ECE) measurements for central Te>5 keV were systematically found to be up to 20% higher than those taken with Thomson scattering (TS) [1, 2]. Conversely,...
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Dr Gerardo Giruzzi (CEA,IRFM)22/06/2022, 11:50Oral
Discrepancies between electron temperature measurements by Thomson Scattering (TS) and Electron Cyclotron Emission (ECE) have been often observed in high-temperature tokamak plasmas, in particular on TFTR [1], JET [2] and FTU [3]. Such observations, made on different machines, by different types of instruments, using different calibration methods, are too ubiquitous to be ascribed to...
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Mr Mingzheng Gong (The University of Tokyo)22/06/2022, 12:10Oral
Investigation on plasma turbulence and micro-instabilities is believed to be essential for understanding the “anomalous” transport phenomenon and improving confinement techniques on plasma. The correlation-electron cyclotron emission (C-ECE) technique, typically cross-correlates two ECE channels that contain identical temperature fluctuation information and individual thermal noise signal. The...
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xin yu22/06/2022, 13:40Oral
Changing the toroidal magnetic field is one of the relative calibration method to obtain the relative calibration coefficients of electron cyclotron emission radiometers (ECE). At the meanwhile, for the HL-2A, there is a Thomson scattering diagnostic system, which can get the accurate electron temperature (Te). By cross comparison with Thomson scattering Te of the center channel, the absolute...
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Dmitry Moseev (Max-Planck-Institut für Plasmaphysik)22/06/2022, 14:00Invited
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Branka Vanovac (Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, MA 02139, USA)22/06/2022, 14:30Oral
The ECRH heated EDA regime at ASDEX Upgrade is an ELM-free regime with good energy confinement properties [1]. As a consequence of high ECRH power, the rotation profiles are hollow, similar to observations in some L-mode plasmas [2], and ELMs are replaced by a quasi-coherent mode regulating the transport and keeping the pedestal stable against large type-I ELMs. Alongside quasi-coherent modes,...
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Rachel Bielajew (MIT)22/06/2022, 14:50Oral
The I-mode confinement regime is a promising operational scenario for future fusion reactors because it features high energy confinement without high particle confinement [1]. The nature of the edge and pedestal turbulence in I-mode plasmas is still under investigation, and open questions exist about the role of the turbulence in determining the transport of I-mode. The edge Weakly Coherent...
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