4 results on '"Francois Calarco"'
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2. Radiofrequency and mechanical tests of silver coated CuCrZr contacts for the ITER ion cyclotron antenna
- Author
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Jérôme Marc Delaplanche, Nicolas Charabot, Raphaël Laloo, Gilles Lombard, Jean Claude Hatchressian, B. Beaumont, Francois Calarco, Yuntao Song, Patrick Mollard, Qingquan Xi Yang, Jean-Michel Bernard, R. Volpe, Vincent Bruno, Julien Hillairet, Zhaoxi Chen, P. U. Lamalle, Viviane Turq, Karl Vulliez, F. Kazarian, Institut de Recherche sur la Fusion par confinement Magnétique ( IRFM ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Centre interuniversitaire de recherche et d'ingenierie des matériaux ( CIRIMAT ), Institut National Polytechnique [Toulouse] ( INP ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Etanchéité ( LE ), Institute of Plasma Physics, Chinese Academy of Sciences ( ASIPP ), ITER [St. Paul-lez-Durance], ITER, Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC), Laboratoire d'Etanchéité (LE), Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), ITER organization (ITER), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Chinese Academy of Sciences (CHINA), Institut National Polytechnique de Toulouse - INPT (FRANCE), ITER Organisation, Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Centre Interuniversitaire de Recherche et d'Ingénierie des Matériaux - CIRIMAT (Toulouse, France), and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
- Subjects
Ion cyclotron resonance heating ,Materials science ,Matériaux ,[ SPI.MAT ] Engineering Sciences [physics]/Materials ,Cyclotron ,FOS: Physical sciences ,01 natural sciences ,[SPI.MAT]Engineering Sciences [physics]/Materials ,010305 fluids & plasmas ,law.invention ,Resonator ,[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] ,law ,Transmission line ,ITER ,0103 physical sciences ,General Materials Science ,Electrical conductor ,Civil and Structural Engineering ,010302 applied physics ,business.industry ,Mechanical Engineering ,Electrical contacts ,[SPI.PLASMA]Engineering Sciences [physics]/Plasmas ,RF power amplifier ,[ PHYS.PHYS.PHYS-PLASM-PH ] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] ,Physics - Plasma Physics ,Plasma Physics (physics.plasm-ph) ,[SPI.ELEC]Engineering Sciences [physics]/Electromagnetism ,Radio-frequency ,Nuclear Energy and Engineering ,[ SPI.ELEC ] Engineering Sciences [physics]/Electromagnetism ,Optoelectronics ,Radio frequency ,[ SPI.PLASMA ] Engineering Sciences [physics]/Plasmas ,Coaxial ,business - Abstract
The ITER Ion Cyclotron Resonance Heating (ICRH) system is designed to couple to the plasma 20 MW of RF power from two antennas in the 40-55 MHz frequency range during long pulses of up to 3600 s and under various plasma conditions with Edge Localized Modes. Radio-Frequency (RF) contacts are integrated within the ITER ICRH launcher in order to ensure the RF current continuity and ease the mechanical assembly by allowing the free thermal expansion of the Removable Vacuum Transmission Line coaxial conductors during RF operations or during 250{\textdegree}C baking phases. A material study has been carried out to determine which materials and associated coatings are relevant for RF contacts application in ITER. In parallel, RF tests have been performed with a new prototype of Multi-Contact (r) LA-CUT/0,25/0 contacts made of silver-coated CuCrZr louvers. During these tests on a RF vacuum resonator, currents between 1.2 kA and 1.3 kA peak have been reached a few tens of times in steady-state conditions without any visible damage on the louvers. A final 62MHz pulse ending in a 300s flat top at 1.9kA resulted in severe damage to the contact. In addition, a test bed which performs sliding test cycles has been built in order to reproduce the wear of the contact prototype after 30 000 sliding cycles on a 3 mm stroke at 175{\textdegree}C under vacuum. The silver coating of the louvers is removed after approximately a hundred cycles whilst, to the contrary, damage to the CuCrZr louvers is relatively low., Fusion Engineering and Design, Elsevier, A Para{\^i}tre
- Published
- 2018
3. Status of the ITER Ion Cyclotron H&CD
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Rajesh Trivedi, Michael Scott Smith, Kumar Rajnish, B. Beaumont, Gajendra Suthar, Francois Calarco, Manoj Kumar Singh, Akhil Jha, D.W. Swain, R. Sartori, Rohit Anand, Paul Wright, Rohit Agarwal, Manoj Patel, Mike McCarthy, Margaret Graham, Davide Kleiner, Hriday Patel, Philippe LamaNe, P. Ajesh, Harsha Machchhar, Mark E. Middendorf, Pareshkumar Vasava, T. Gassmann, Craig Deibele, Nicolas Ferrigno, F. Kazarian, Sriprakash Verma, Aparajita Mukherjee, David A Rasmussen, Tania Alonzo Montemayor, Amit Patel, Richard W. Hanks, K. Vetter, Raghuraj Singh, Kartik Mohan, Narinder Singh, Dipal Soni, Hrushikesh Dalicha, Jvs Hari, Richard Goulding, and Roberto Sanabria
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Engineering ,business.industry ,Nuclear engineering ,Physics ,QC1-999 ,Cyclotron ,Electrical engineering ,01 natural sciences ,010305 fluids & plasmas ,law.invention ,Ion ,law ,0103 physical sciences ,010306 general physics ,business ,Design evolution - Abstract
The ITER Ion Cyclotron Heating and Current Drive system (IC H&CD) is designed to deliver 20MW to a broad range of plasma scenarios between 40 and 55MHz, during very long pulses. It consists of two broadband equatorial port plug antennas, their pre-matching and matching systems, transmission lines, Radio Frequency (RF) Sources and High Voltage Power Supplies. The overall project schedule has been revised and agreed by ITER Council; it re-integrates the second antenna and its power supplies in construction baseline and sets the dates for progressive installation with DT phase planned in 2035. Recent progress on ICRF subsystems is reported, covering design evolution, qualification of test articles and specific R&D results in domestic agencies, suppliers, associated laboratories and IO.
- Published
- 2017
4. Status of the ITER ion cyclotron heating and current drive system
- Author
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Kumar Rajnish, D.W. Swain, Rob Bamber, L. Colas, A. Turner, Raghuraj Singh, Dieter Leichtle, R. Sartori, B. Beaumont, F. Kazarian, C. Oberlin-Harris, Richard Goulding, A. Cadinot, F. Durodié, David A Rasmussen, X. Courtois, Aparajita Mukherjee, L. Meunier, M. Kocan, Julien Hillairet, R. Sanabria, H. Labidi, N. L. Greenough, M. Mccarthy, A. M. Messiaen, E. Fredd, G. Agarici, A. M. Patel, D. Boilson, A. Kaye, Rajesh Trivedi, Craig Deibele, J.M. Bernard, T. Alonzo Montemayor, B. Peters, P. U. Lamalle, A. Loarte, Francois Calarco, J. Jacquinot, T. Gassmann, and J. Fano
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Coupling ,Engineering ,business.industry ,Nuclear engineering ,RF power amplifier ,Cyclotron ,Electrical engineering ,law.invention ,Design for manufacturability ,Acceptance testing ,law ,Transmission line ,Antenna (radio) ,business ,Faraday cage - Abstract
The paper reports on latest developments for the ITER Ion Cyclotron Heating and Current Drive system: imminent acceptance tests of a prototype power supply at full power; successful factory acceptance of candidate RF amplifier tubes which will be tested on dedicated facilities; further design integration and experimental validation of transmission line components under 6MW hour-long pulses. The antenna Faraday shield thermal design has been validated above requirements by cyclic high heat flux tests. R&D on ceramic brazing is under way for the RF vacuum windows. The antenna port plug RF design is stable but major evolution of the mechanical design is in preparation to achieve compliance with the load specification, warrant manufacturability and incorporate late interface change requests. The antenna power coupling capability predictions have been strengthened by showing that, if the plasma scrape-off layer turns out to be steep and the edge density low, the reference burning plasma can realistically be displaced to improve the coupling.
- Published
- 2015
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