Author/Authors :
Pamela ، نويسنده , , J. and Fumelli، نويسنده , , M. and Hemsworth، نويسنده , , R.S. and Jacquot، نويسنده , , C. and Jequier، نويسنده , , F. and Simonin، نويسنده , , A. and Hopkins، نويسنده , , M.B. and Turner، نويسنده , , M.M. and De Esch، نويسنده , , H.P.L. and Challis، نويسنده , , C. and Stork، نويسنده , , D. and Thompson، نويسنده , , E.، نويسنده ,
Abstract :
The European negative ion based neutral beam development programme consists presently of experiments on high energy electrostatic accelerators and high current D− sources, and of neutral beam physics and system design studies. At CEA-Cadarache the source test bed MANTIS started operation last June, and the 1 MV, 0.1 A, D− acceleration project SINGAP will be operational by the end of 1994. Additionally, negative ion source physics-oriented experiments will be conducted at Dublin City University. A Pagoda source, developed for the SINGAP experiment, recently produced more than 1 A D− beams and j(D−) of 10 mA cm−2, with Cs seeding, at 0.6 Pa operating pressure. 1.3 A H− and 0.5 A D− beams have also been obtained without the use of Cs during the first experiments on MANTIS. Studies on neutral beam heating (NBH) for a next step machine have been conducted during 1993, mainly at JET and CEA-Cadarache. NBH physics studies based on the RLW model indicate that ignition on ITER-EDA should be reached with about 40 MW of 0.4–1 MeV D0 beams. The outlines of an NBH system for ITER-EDA, based on SINGAP, have been studied.
