Benchmark of coupling codes (ALOHA, TOPLHA and GRILL3D) with ITER-relevant Lower Hybrid antenna

• Published in: Fusion engineering and design Vol. 86; no. 6; pp. 827 - 830
• Main Authors: Milanesio, D., Hillairet, J., Panaccione, L., Maggiora, R., Artaud, J.F., Bae, Y.S., Barbera, A.M.A., Belo, J., Berger-By, G., Bernard, J.M., Cara, Ph, Cardinali, A., Castaldo, C., Ceccuzzi, S., Cesario, R., Decker, J., Delpech, L., Ekedahl, A., Garcia, J., Garibaldi, P., Goniche, M., Guilhem, D., Hamlyn-Harris, C., Hoang, G.T., Jia, H., Huang, Q.Y., Imbeaux, F., Kim, S.H., Lausenaz, Y., Magne, R., Marfisi, L., Meschino, S., Mirizzi, F., Namkung, W., Pajewski, L., Peysson, Y., Saille, A., Schettini, G., Schneider, M., Sharma, P.K., Tuccillo, A.A., Tudisco, O., Villari, R., Vulliez, K., Wu, Y., Zeng, Q.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01-10-2011; Elsevier
• Subjects: Antennas; Applied sciences; Computer simulation; Controled nuclear fusion plants; Density; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Installations for energy generation and conversion: thermal and electrical energy; ITER; Joining; Launchers; Lower Hybrid; Modules; PAM; Reflection coefficient; Waveguides; Lower Hybrid; PAM; ITER; Tokamak; Nuclear fusion reactor; Boundary value; Plasma density
• ISSN: 0920-3796; 1873-7196
• DOI: 10.1016/j.fusengdes.2010.12.036

In order to assist the design of the future ITER Lower Hybrid launcher, coupling codes ALOHA, from CEA/IRFM, TOPLHA, from Politecnico di Torino, and GRILL3D, developed by Dr. Mikhail Irzak (A.F. Ioffe Physico-Technical Institute, St. Petersburg, Russia) and operated by ENEA Frascati, have been compared with the updated (six modules with four active waveguides per module) Passive-Active Multi-junction (PAM) Lower Hybrid antennas. Both ALOHA and GRILL3D formulate the problem in terms of rectangular waveguides modes, while TOPLHA is based on boundary-value problem with the adoption of a triangular cell-mesh to represent the relevant waveguides surfaces. Several plasma profiles, with varying edge density and density increase, have been adopted to provide a complete description of the simulated launcher in terms of reflection coefficient, computed at the beginning of each LH module, and of power spectra. Good agreement can be observed among codes for all the simulated profiles.