B WEYSSOW 2009 Coordinated research activities under European Fusion Development Agreement (addressing fuelling) Boris Weyssow EFDA-CSU Garching ITPA 2009.

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Presentation transcript:

B WEYSSOW 2009 Coordinated research activities under European Fusion Development Agreement (addressing fuelling) Boris Weyssow EFDA-CSU Garching ITPA 2009

B WEYSSOW 2009 Collective use of JET Reinforced coordination of physics and technology in EU laboratories Training EU contributions to international collaborations outside F4E All EU Laboratories/Institutions working on Fusion are parties to EFDA EFDA

B WEYSSOW 2009 EFDA Task Forces & Topical Groups Task Forces under EFDA - Plasma Wall Interaction (PWI) - Integrated Tokamak Modelling (ITM) Topical Groups under EFDA - Transport Topical Group - H&CD Topical Group (+ fuelling technology) - Diagnostics Topical Group - MHD Topical Group Coordination of R&D

B WEYSSOW 2009 “Fuelling/Pumping or Particle Control” Transversal activity across TG and TF

Weyssow 2009 – Ensure sufficient fuel (D+T) in the core Pellets (ITM modules planned for Transport + Diag) – Ensure that the core is hot enough NBI, ICRH, ECRH (ITM modules in 2009/ HCD) – Ensure sufficient exhaust of ash (He) Edge codes (ITM [coupling planned 2010] + PWI + Transport) – Ensure sufficient upstream separatrix density so that divertor heat loads are controlled and that target erosion made small enough Edge codes (ITM [coupling planned 2010] + PWI + Transport) – Probably also need to puff radiating impurities Core impurities (ITM modules planned for 2009 ) Edge impurities (ITM [coupling planned 2010]) – Ensure density in front of ICRH and LH antennas sufficient ITM [fully coupled in 2010] + HCD Burn and Particle Control

B WEYSSOW 2009 Particle control: ITER requirements - Proper fuelling is essential for all aspects of ITER plasma operation - High DT throughput (factor ~ 300 higher than burn-out) is unattractive for the fusion reactor [huge T plant; T availability] - More studies are needed to confirm or improve estimates on fuelling throughput - e.g. wall absorption/outgassing on the particle control in ITER needs to be analysed Kukushkin (Garching, 2009)

B WEYSSOW 2009 Radiative cooling mandatory in W-AUG In ITER: much slower seed impurity removal thus quick radiation rise Global flow chart of the divertor With all the leak paths Intervac Modelling for cryopump design and calculation of pumping efficiency per species Divertor heat load and particle control Ex: Constraints on particle control resulting from ITER slow pumping speed? – Also for glow discharges and RF conditioning

Weyssow 2009 Pellets Also better model for pellet penetration, ablation and transport is needed.

Weyssow Pellet fuelling experiments to validate ITER scenarios. Assist in pellet fuelling database for extrapolation to ITER 2- Modelling of pellet physics: drift, dispersion and evaporation in particular in the pedestal, as well as impact on the plasma such as the L-H power threshold, ELM triggering. 3- Reinforced activity on integration of particle control in ITER plasma scenarios simulations: - Analysis of the consequences of slow ITER pumping rate on wall conditioning (GDC and RF) and on scenarios (compatibility with radiative divertor). - Predictive modelling for gas flow coupling the divertor, pumping, and duct systems (also for DEMO) (detailing leaks -> pumping efficiency per species). EFDA WP Programme 2010: Fuelling physics