Supersonic molecular beam fuelling at ASDEX upgrade
Besides the two common fuelling techniques used in all major tokamak experiments, namely the gas puff and the frozen pellet injection, a new technique, the so-called supersonic molecular beam injection (SMBI), has been developed at Tore Supra. This technique is based on the fast expansion of a small volume of deuterium at high pressure through a laval nozzle into the plasma chamber. Results obtained in limiter configuration look promising: enhanced fuelling efficiency compared to gas puff, in the 30-50% range, have been observed. Recently, one SMB injector has been implemented in the divertor tokamak ASDEX Upgrade in order to study ELM and assess the fuelling potential of the technique. First fuelling results obtained in divertor configuration are reported and discussed in this paper.
Bibliographic Reference: An oral paper given at: 31st EPS Conference on Controlled Fusion and Plasma Physics Organised by: CCLRC Rutherford Appleton Laboratory (GB); EURATOM/UKAEA Fusion Association (GB) Held at: Imperial College London(GB)
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: email@example.com
Record Number: 200417665 / Last updated on: 2004-07-30
Original language: en
Available languages: en