Archivio Istituzionale della RicercaDuring operation of the ASDEX Upgrade (AUG) ion cyclotron radio frequency (ICRF) system, Tungsten (W)‐coated poloidal limiters and structures connected along magnetic field lines to the antenna can be sources of W, which is attributed to sputtering by ions accelerated in radio frequency (RF) sheaths. In order to analyze and optimize the ICRF antenna performance, accurate and efficient simulation tools are necessary. TOPICA code was developed for analysis of ICRF antenna systems with plasma loading conditions modeled with ID FELICE code. This paper presents an initial comparative analysis of two AUG ICRF antennas for a set of model plasma density profiles (with varying density gradient and antenna cut‐off distance). The antennas are presently installed in AUG and differ in that one was partially optimized using HFSS code to reduce E∥ near fields. Power transferred to plasma and sheath driving RF potentials are computed.
Density profile sensitivity study of ASDEX Upgrade ICRF Antennas with the TOPICA code / Krivska, A.; Ceccuzzi, S.; Milanesio, Daniele; Bobkov, V.; Braun, F.; Maggiora, Riccardo; Noterdaeme, J. M.; Tuccillo, A. A.. - In: AIP CONFERENCE PROCEEDINGS. - ISSN 0094-243X. - STAMPA. - 1406:(2011), pp. 93-96. (Intervento presentato al convegno 19th Topical Conference on Radio Frequency Power in Plasmas tenutosi a Newport, Rhode Island, USA nel 1-3 June 2011) [10.1063/1.3664936].
Density profile sensitivity study of ASDEX Upgrade ICRF Antennas with the TOPICA code
MILANESIO, DANIELE;MAGGIORA, Riccardo;
2011
Abstract
During operation of the ASDEX Upgrade (AUG) ion cyclotron radio frequency (ICRF) system, Tungsten (W)‐coated poloidal limiters and structures connected along magnetic field lines to the antenna can be sources of W, which is attributed to sputtering by ions accelerated in radio frequency (RF) sheaths. In order to analyze and optimize the ICRF antenna performance, accurate and efficient simulation tools are necessary. TOPICA code was developed for analysis of ICRF antenna systems with plasma loading conditions modeled with ID FELICE code. This paper presents an initial comparative analysis of two AUG ICRF antennas for a set of model plasma density profiles (with varying density gradient and antenna cut‐off distance). The antennas are presently installed in AUG and differ in that one was partially optimized using HFSS code to reduce E∥ near fields. Power transferred to plasma and sheath driving RF potentials are computed.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11583/2495879
Attenzione
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo