Transport simulations and electric field in T-10 and TJ-II

Abstract

A modeling of the transport processes in T-10 tokamak using Astra code for two sets of discharges having ECRH auxiliary heating is presented. Electric potential measurements using HIBP show that radial profiles are negative for ohmic heating but become positive for large heating powers. We first obtain $T_{\alpha }$ and n profiles by adjusting transport coefficients and then try to obtain the radial $E_r$ profiles by assuming three models for it. Results show good agreement for Ohmic and small ECRH power phases but not for large power where $E_r>0$ indicating that other processes have to be included.

Keywords:

• Plasma magnetic confinement
• transport simulations

Acknowledgments

We thank A.V. Melnikov for providing the data of T-10 shown here. Collaboration with D. Lopez-Bruna and C. Gutierrez-Tapia in these work is acknowledged.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

Support from Project Number DGAPA-UNAM PAPIIT IN11002, Conacyt Project No. A1-S-24157, and supercomputer Project No. LANCAD-UNAM-DGTIC-104 is gratefully acknowledged.

Notes on contributors

J.J. Martinell

J.J. Martinell has a BS and MS from National Autonomous University of Mexico (UNAM) and a PhD from Massachusetts Institute of Technology, USA. He is a professor in Nuclear Science Institute at UNAM.

H.U. Lara-Martínez

H.U. Lara-Martinez has a BS from UNAM and is a MS student at University of York, UK.