V. G. Kiptily M. Fitzgerald V. Goloborodko S. E. Sharapov C. D. Challis D. Frigione J. Graves M. J. Mantsinen P. Beaumont M. Garcia-Munoz C. Perez von Thun J. F. R. Rodriguez D. Darrow D. Keeling D. King K. G. McClements E. Solano S. Schmuck G. Sips G. Szepesi JET contributors
During development of a high-performance hybrid scenario for future deuterium–tritium experiments on the Joint European Torus, an increased level of fast ion losses in the MeV energy range was observed during the instability of high-frequency n = 1 fishbones. The fishbones are excited during deuterium neutral beam injection combined with…Preprint Published
V. G. Kiptily P. Beaumont F. Belli F. E. Cecil S. Conroy T. Craciunescu M. Garcia-Munoz M. Curuia D. Darrow Et. Al.
JET equipped with ITER-like wall (a beryllium wall and a tungsten divertor) can provide auxiliary heating with power up to 35MW, producing a significant population of alpha-particles in DT operation. The direct measurements of alphas are very difficult and alpha-particle studies require a significant development of dedicated diagnostics. JET now ha…Published
A. Argouarch R. Bamber B. Beaumont J.-M. Bernard J. M. Delaplanche F. Durodié J. C. Hatchressian P. Lamalle G. Lombard K. Nicholls J. C. Patterlini M. Shannon D. Thouvenin P. Tigwell R. Volpe K. Vulliez
In the framework of the Ion Cyclotron (IC) antenna design, ITER Organization requested qualification tests on sliding Radio-Frequency (RF) contacts, to verify that these contacts (quality class 1) are designed appropriately to guarantee a sufficient operational life time. These RF contacts will be integrated into the antenna structure at different …Published
David Hancock Mark Shannon Bertrand Beaumont Pierre Dumortier Frederic Durodie Volodymyr Kyrytsya Fabrice Louche Robert Mckinley Keith Nicholls The Cycle Team
In the ITER equatorial ports containing ICRH antennas, parasitic electrical resonances can be excited in the nominal 20 mm clearance gap between the port walls and the plug contained within it. RF calculations have established that these resonances can be effectively mitigated by a series of suitably located electrically conducting contacts between…Published
P. U. Lamalle B. Beaumont T. Gassmann F. Kazarian B. Arambhadiya et al.
The ITER Ion Cyclotron Heating and Current Drive system will deliver 20MW of radio frequency power to the plasma in quasi continuous operation during the different phases of the experimental programme. The system also has to perform conditioning of the tokamak first wall at low power between main plasma discharges. This broad range of reqiurements …Published
M. P. S. Nightingale F. Durodié A. Argouarch B. Beaumont A. Becoulet et al.
Following an overview of the ITER Ion Cyclotron Resonance Frequency (ICRF) system, the JET ITER-like antenna (ILA) will be described. The ILA was designed to test the following ITER issues: (a) reliable operation at power densities of order 8MW/m^ at voltages up to 45kV using a close-packed array of straps; (b) powering through ELMs using an intern…Published
A. Ekedahl L. Colas M.L. Mayoral B. Beaumont Ph. Bibet et al.
Combined operation of Lower Hybrid (LH) and Ion Cyclotron Resonance Frequency (ICRF) waves can result in a degradation of the LH wave coupling, as observed both in the Tore Supra and JET tokamaks. The reflection coefficient on the part of the LH launcher magnetically connected to the powered ICRF antenna increases, suggesting a local decrease in th…Published