{'fraction_non_alphanumeric': 0.03736479842674533, 'fraction_numerical': 0.0019665683382497543, 'mean_word_length': 4.817142857142857, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Edge plasma transport modeling for the design of KT-2 tokamak poloidal divertor

A two-dimensional, two-fluid numerical modeling is carried out for the edge plasmas of the KT-2 tokamak with a poloidal divertor configuration. Poloidal drift motions, electrostatic potential and plasma currents are solved self-consistently with other variables in the nonlinear time-dependent transport equations describing particle, momentum and energy conservations for electrons and ions. Transports of recycling neutrals are modeled using the Monte-Carlo simulation. As a result, it is found that the large sheared poloidal rotation exists in the edge region due to the radially-varying electrostatic potential and the resultant radial electric field and that it is mainly driven by an electric (E/spl I.oarr//spl times/B/spl I.oarr/) drift dominating over a diamagnetic to (/spl nabla/p/sub i//spl times/B/spl I.oarr/) drift. The heat fluxes and sputtering rates are estimated from the present code for the divertor target plates.