In 2016, we have designed, built and finally tested at the FE200 facility in Le Creusot (France) a planar mock-up mimicking the water-cooled cylindrical resonance cavity of the European 170 GHz, 1 MW gyrotron to be used for electron cyclotron plasma heating in ITER. The aim of the mock-up is the characterization of the cooling capability of the cavity. A Glidcop® target is heated with an electron beam gun with resulting peak heat fluxes relevant for the full-size cavity. Underneath the target surface, whose temperature is monitored by means of a pyrometer, a set of parallel semi-circular mini-channels, with diameter of 1.5 mm, allows the flow of pressurized water, entering the mockup at ~ 9 bar and 40 °C. Several thermocouples measure the target temperature, at different distances from the heated target surface. The experimental results show that the mock-up is capable to withstand a heat fluxes of 21 MW/m2, while the cooling system keeps the heated surface below ~ 400 °C, for flow conditions comparable to those of the full-size cavity. The test results are used to first calibrate the uncertain model parameters and then, with frozen parameters, to validate a previously developed CFD model, showing good agreement with the experiment. In view of its reliability, this model might eventually be a useful tool for the simulation of the full-size gyrotron cavity operation.
Design, Test and Analysis of a Gyrotron Cavity Mock-Up Cooled Using Mini Channels / Bertinetti, Andrea; Albajar, Ferran; Cau, Francesca; Leggieri, Alberto; Legrand, Francois; Perial, Etienne; Ritz, G.; Savoldi, Laura; Zanino, Roberto; Zappatore, Andrea. - In: IEEE TRANSACTIONS ON PLASMA SCIENCE. - ISSN 0093-3813. - STAMPA. - (2018).
|Titolo:||Design, Test and Analysis of a Gyrotron Cavity Mock-Up Cooled Using Mini Channels|
|Data di pubblicazione:||2018|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1109/TPS.2018.2829600|
|Appare nelle tipologie:||1.1 Articolo in rivista|