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Volume 277 (2023)

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EPJ Web of Conferences

Volume 277 (2023)

21^st Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC21)

ITER Organization, France, June 20-24, 2022
E. Poli, Y. Liu and V. Udintsev (Eds.)

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Statement of Peer review

Published online: 23 February 2023

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Open Access

Preface 00001

Emanuele Poli, Yong Liu and Victor Udintsev

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327700001

Theory

Open Access

Radiation pressure by electron cyclotron waves on density fluctuations 01001

Abhay Ram and Kyriakos Hizanidis

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701001

Open Access

Parametric Decay Instabilities during Electron Cyclotron Resonance Heating of Fusion Plasmas, Problems and Possibilities 01002

S.K. Hansen, S.K. Nielsen, J. Stober, J. Rasmussen, M. Salewski, M. Willensdorfer, M. Hoelzl, M. Stejner and the ASDEX Upgrade Team

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701002

Open Access

Paraxial beams in fluctuating fusion plasmas: Diffusive limit and beyond 01003

Hannes Weber, Omar Maj and Emanuele Poli

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701003

Open Access

New modelling capabilities to support the ITER EC H&CD System optimisation and preparation of plasma operation 01004

Melanie Preynas, Mireille Schneider, Jose Manuel Arroyo, Florent Beaumont, Natalia Casal, Munseok Choe, Giuseppe Carannante, Franco Gandini, Mark A. Henderson, Toshimichi Omori et al. (2 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701004

Open Access

Calculations for the optical system for the first ITER plasma 01005

Burkhard Plaum, Mélanie Preynas and Munseok Choe

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701005

Open Access

ECH and ECCD modelling studies for DTT 01006

Benedetta Baiocchi, Lorenzo Figini, Alessandro Bruschi, Francesco Fanale, Saul Garavaglia, Gustavo Granucci and Afra Romano

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701006

Open Access

Refinement of the EC stray radiation estimates for ITER 01007

Franco Gandini

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701007

Open Access

ECRF stray radiation studies in preparation of the operations of JT-60SA 01008

Carlo Sozzi, Ken Kajiwara, Takayuki Kobayashi, Lorenzo Figini, Luca Garzotti, Alessandro Moro, Silvana Nowak and David Taylor

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701008

Open Access

Nonlinear degradation of O-X-B mode conversion in MAST Upgrade 01009

Mads Givskov Senstius, Simon James Freethy and Stefan Kragh Nielsen

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701009

Open Access

Benchmarking full-wave codes for studying the O-SX mode conversion in MAST Upgrade 01010

Alf Köhn-Seemann, Bengt E. Eliasson, Simon J. Freethy, Lou A. Holland and Roddy G.L. Vann

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701010

Open Access

Electron Bernstein Wave (EBW) current drive profiles and efficiency for STEP 01011

Thomas Wilson, Simon Freethy, Mark Henderson, Alf Köhn-Seeman, Ivan Konoplev, Samuli Saarelma, David Speirs, Roddy Vann and the STEP team

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701011

Open Access

Induced microwave scattering in the ITER edge transport barrier at ECRH and possibility of its modeling at ASDEX-Upgrade 01012

Evgeniy Gusakov, Alexei Popov and Michael Irzak

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327701012

Experiment

Open Access

Development of ECRH-based methods for assisted discharge burn-through: Experiment and simulation 02001

D. Ricci, J. Stober, R. Dux, L. Figini, T. Wauters, E. Lerche, G. Granucci, the ASDEX Upgrade Team and Eurofusion WPTE Team

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327702001

Open Access

Electron cyclotron heating assisted start-up experiments in J-TEXT 02002

Junli Zhang, Peter C de Vries, Kazunobu Nagasaki, Donghui Xia, Wei Jiang, Zhoujun Yang, Zhifeng Cheng, Xin Xu, Zhijiang Wang, Nengchao Wang et al. (6 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327702002

Open Access

Plasma heating and improvement of lower hybrid current drive efficiency by electron cyclotron waves on EAST 02003

Miaohui Li, Handong Xu, Xiaojie Wang, Mao Wang, Bojiang Ding, Weiye Xu, Dajun Wu, Yunying Tang, Liyuan Zhang, Zege Wu et al. (10 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327702003

Open Access

The development of 1 MW ECRH system on J-TEXT 02004

Xixuan Chen, Donghui Xia, Junli Zhang, Zhijiang Wang, Yuan Pan and J-TEXT team

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327702004

Open Access

ECRH experiments on Tokamaks SST-1 & Aditya-U and ECRH upgradation plan for SST-1 02005

Braj Kishore Shukla, Jatin Patel, Harshida Patel, Dharmesh Purohit, Hardik Mistry, K.G. Parmar, SST-1 Team and ADITYA-U Team

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327702005

Open Access

Operational domain for the new 3MW/1000s ECRH System on WEST 02006

T. Fonghetti, R. Dumont, G. Giruzzi, J.-F. Artaud, J.-M. Bernard, F. Bouquey, C. Bourdelle, L. Delpech, J. Hillairet, P. Maget et al. (6 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327702006

Open Access

Quantification of X3 absorption for ITER L-mode parameters in ASDEX Upgrade 02007

Jörg Stober, Martin Schubert, Mireille Schneider, Severin S. Denk, Rainer Fischer, Emanuele Poli, Dirk Stieglitz, Matthias Willensdorfer, Alberto Loarte, Daria Ricci et al. (2 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327702007

Open Access

Experiments with reduced single pass absorption at ASDEX Upgrade – instrumentation and applications 02008

Martin Schubert, Joerg Stober, Albrecht Herrmann, Eduard Grigore, Walter Kasparek, Carsten Lechte, Francesco Monaco, Bernhard Petzold, Burkhard Plaum, Emanuele Poli et al. (4 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327702008

Open Access

Simulation and reflectivity measurements of the ITER first plasma beam dump material 02009

Andreas Hentrich

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327702009

Diagnostics

Open Access

Database study of turbulent electron temperature fluctuation measurements at ASDEX Upgrade 03001

Christian Yoo, Rachel Bielajew, Garrard D. Conway, Pedro A. Molina Cabrera, Pablo Rodriguez-Fernandez, Branka Vanovac, Anne E. White, the EUROfusion MST1 Team and the ASDEX Upgrade Team

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703001

Open Access

Electron temperature fluctuation measurements with Correlation Electron Cyclotron Emission in L-mode and I-mode plasmas at ASDEX Upgrade 03002

Rachel Bielajew, Garrard D Conway, Tim Happel, Klara Höfler, Pedro A Molina Cabrera, Ulrike Plank, Pablo Rodriguez-Fernandez, Davide Silvagni, Branka Vanovac, Christian Yoo et al. (2 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703002

Open Access

Electron temperature fluctuation levels of the quasi-coherent mode across the plasma radius 03003

Branka Vanovac, Jörg Stober, Elisabeth Wolfrum, Matthias Willensdorfer, Luís Gil, Michael Faitsch, Rachel Bielajew, Christian Yoo, Garrard Conway, Severin Denk et al. (3 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703003

Open Access

Radial localization of electron temperature pedestal and ELM-like events using ECE measurements at Wendelstein 7-X 03004

N. Chaudhary, M. Hirsch, T. Andreeva, J. Geiger, U. Hoefel, K. Rahbarnia, G. A. Wurden, R. C. Wolf and the W7-X Team

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703004

Open Access

A model of non-Maxwellian electron distribution function for the analysis of ECE data in JET discharges 03005

G. Giruzzi, M. Fontana, F.P. Orsitto, E. de la Luna, R. Dumont, L. Figini, M. Maslov, S. Mazzi, S. Schmuck, L. Senni et al. (14 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703005

Open Access

Investigation of T_e measurements discrepancies between ECE and Thomson diagnostics in high-performance plasmas in JET 03006

M. Fontana, G. Giruzzi, F. P. Orsitto, E. de la Luna, R. Dumont, L. Figini, D. Kos, M. Maslov, S. Schmuck, C. Sozzi et al. (13 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703006

Open Access

Current status of ECE system on EAST tokamak 03007

Hailin Zhao, Ang Ti, Tianfu Zhou, Zeying Zhu, Yong Liu, Bili Ling, Qing Zang, Juan Huang and Xianzu Gong

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703007

Open Access

New Q and V-band ECE radiometer for low magnetic field operation on LHD 03008

Tokihiko Tokuzawa, Yuki Goto, Daisuke Kuwahara, Masaki Nishiura and Takashi Shimizu

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703008

Open Access

Upgrade of the relative calibration methods and Bayesian inference processing for electron cyclotron emission radiometry 03009

Xin Yu, Zhongbing Shi, Zengchen Yang, Min Jiang, Wei Chen, Tianbo Wang and Wenan Pan

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703009

Open Access

Design of Stray Radiation Sensor for ITER ECE Diagnostic 03010

S. Danani, Sheetal Punia, Ravinder Kumar, Hitesh Kumar B. Pandya and Vinay Kumar

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703010

Open Access

Physics Studies for Assessment of Requirement of Displacement Compensation System for ITER ECE Diagnostic 03011

S. Danani, Hitesh Kumar B. Pandya, Pratik Vaghashiya, Shrishail Padasalagi, Ravinder Kumar, W. L. Rowan, J. P. Ziegel and Vinay Kumar

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327703011

Open Access

Erratum

Erratum to: Radial localization of electron temperature pedestal and ELM-like events using ECE measurements at Wendelstein 7-X 03012

N. Chaudhary, M. Hirsch, T. Andreeva, J. Geiger, U. Hoefel, K. Rahbarnia, G. A. Wurden, R. C. Wolf and the W7-X Team

Published online: 22 March 2023

DOI: https://doi.org/10.1051/epjconf/202327703012

Technology

Open Access

Microwave current drive for STEP and MAST Upgrade 04001

Simon Freethy, Lorenzo Figini, Mark Henderson, Hana El-Haroun, Bengt Eliason, Sam Gibson, Krassimir Kirov, Alf Köhn-Seemann, Ivan Konoplev, Samuli Saarelma et al. (6 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327704001

Open Access

ITER ECH&CD Control System: Architecture, interfaces and status of development 04002

Giuseppe Carannante, Mario Cavinato, Katarina Cindric, Peter De Vries, Federico Felici, Martino Giordano Ferrari, Giuseppe Ferrò, Mark Henderson, André Neto, Melanie Preynas et al. (3 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327704002

Open Access

The ECRH-Power Upgrade at the Wendelstein 7-X Stellarator 04003

H. P. Laqua, K. A. Avramidis, H. Braune, I. Chelis, G. Gantenbein, S. Illy, Z. Ioannidis, J. Jelonnek, J. Jin, L. Krier et al. (13 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327704003

Open Access

MAST Upgrade microwave heating and current drive system – engineering design overview 04004

Helen Webster, Simon Freethy, Mark Henderson, Joe Allen, Ottone Caretta, Shail Desai, James Holden, Dariusz Maszczyk, Elias Melidis, Hendrik Meyer et al. (3 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327704004

Open Access

Status of the ITER ECRH&CD control system development 04005

Giuseppe Carannante, Mario Cavinato, Katarina Cindric, Martino Ferrari, Giuseppe Ferrò, Andre Cabrita Neto and Filippo Sartori

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327704005

Open Access

Development of the Multi-Beam Transmission Line for DTT ECRH system 04006

Saul Garavaglia, Alex Bruschi, Francesco Fanale, Gustavo Granucci, Alessandro Moro, Paola Platania, Afra Romano, Stefan Schmuck, Alessandro Simonetto and Espedito Vassallo

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327704006

Open Access

Gyrotron anode voltage control in EAST ECRH system 04007

Weiye Xu, Handong Xu, Jian Zhang, Fei Guo and Haozhang Sun

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327704007

Open Access

1.5 MW CW RF Loads for Gyrotrons 04008

Lawrence Ives, Thuc Bui, Thomas Habermann, George Collins, David Marsden, Jeffrey Neilson, Tim Horn and Chris Rock

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327704008

Open Access

MISTRAL campaign in support of W7-X long pulse operation 04009

Johan W. Oosterbeek, Mathias Stern, Harald Braune, Karsten Ewert, Matthias Hirsch, Frank Hollmann, Andreas Killinger, Heinrich P. Laqua, Philippe Maquet, Stefan Marsen et al. (9 more)

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327704009

Open Access

High power mm-wave loss measurements of ITER ex-vessel waveguide components at the FALCON test facility at the Swiss Plasma Center 04010

Timothy P. Goodman, Humberto Torreblanca, Cinta Marraco Borderas, René Chavan, Avelino Mas Sanchez, Anastasia Xydou, Mario Cavinato and Katarina Cindric

Published online: 23 February 2023

DOI: https://doi.org/10.1051/epjconf/202327704010

EPJ Web of Conferences

Volume 277 (2023)

21st Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC21)

Statement of Peer review

Preface 00001

Theory

Radiation pressure by electron cyclotron waves on density fluctuations 01001

Parametric Decay Instabilities during Electron Cyclotron Resonance Heating of Fusion Plasmas, Problems and Possibilities 01002

Paraxial beams in fluctuating fusion plasmas: Diffusive limit and beyond 01003

New modelling capabilities to support the ITER EC H&CD System optimisation and preparation of plasma operation 01004

Calculations for the optical system for the first ITER plasma 01005

ECH and ECCD modelling studies for DTT 01006

Refinement of the EC stray radiation estimates for ITER 01007

ECRF stray radiation studies in preparation of the operations of JT-60SA 01008

Nonlinear degradation of O-X-B mode conversion in MAST Upgrade 01009

Benchmarking full-wave codes for studying the O-SX mode conversion in MAST Upgrade 01010

Electron Bernstein Wave (EBW) current drive profiles and efficiency for STEP 01011

Induced microwave scattering in the ITER edge transport barrier at ECRH and possibility of its modeling at ASDEX-Upgrade 01012

Experiment

Development of ECRH-based methods for assisted discharge burn-through: Experiment and simulation 02001

Electron cyclotron heating assisted start-up experiments in J-TEXT 02002

Plasma heating and improvement of lower hybrid current drive efficiency by electron cyclotron waves on EAST 02003

The development of 1 MW ECRH system on J-TEXT 02004

ECRH experiments on Tokamaks SST-1 & Aditya-U and ECRH upgradation plan for SST-1 02005

Operational domain for the new 3MW/1000s ECRH System on WEST 02006

Quantification of X3 absorption for ITER L-mode parameters in ASDEX Upgrade 02007

Experiments with reduced single pass absorption at ASDEX Upgrade – instrumentation and applications 02008

Simulation and reflectivity measurements of the ITER first plasma beam dump material 02009

Diagnostics

Database study of turbulent electron temperature fluctuation measurements at ASDEX Upgrade 03001

Electron temperature fluctuation measurements with Correlation Electron Cyclotron Emission in L-mode and I-mode plasmas at ASDEX Upgrade 03002

Electron temperature fluctuation levels of the quasi-coherent mode across the plasma radius 03003

Radial localization of electron temperature pedestal and ELM-like events using ECE measurements at Wendelstein 7-X 03004

A model of non-Maxwellian electron distribution function for the analysis of ECE data in JET discharges 03005

Investigation of Te measurements discrepancies between ECE and Thomson diagnostics in high-performance plasmas in JET 03006

Current status of ECE system on EAST tokamak 03007

New Q and V-band ECE radiometer for low magnetic field operation on LHD 03008

Upgrade of the relative calibration methods and Bayesian inference processing for electron cyclotron emission radiometry 03009

Design of Stray Radiation Sensor for ITER ECE Diagnostic 03010

Physics Studies for Assessment of Requirement of Displacement Compensation System for ITER ECE Diagnostic 03011

Erratum to: Radial localization of electron temperature pedestal and ELM-like events using ECE measurements at Wendelstein 7-X 03012

Technology

Microwave current drive for STEP and MAST Upgrade 04001

ITER ECH&CD Control System: Architecture, interfaces and status of development 04002

The ECRH-Power Upgrade at the Wendelstein 7-X Stellarator 04003

MAST Upgrade microwave heating and current drive system – engineering design overview 04004

Status of the ITER ECRH&CD control system development 04005

Development of the Multi-Beam Transmission Line for DTT ECRH system 04006

Gyrotron anode voltage control in EAST ECRH system 04007

1.5 MW CW RF Loads for Gyrotrons 04008

MISTRAL campaign in support of W7-X long pulse operation 04009

High power mm-wave loss measurements of ITER ex-vessel waveguide components at the FALCON test facility at the Swiss Plasma Center 04010

21^st Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC21)

Investigation of T_e measurements discrepancies between ECE and Thomson diagnostics in high-performance plasmas in JET 03006