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Abstract

The first phase of Neutral Injection heating on JET requires injection of 5 MW of 80 keV neutral atoms into the plasma torus for times in excess of 10 sec. Eight injectors, each rated at 80 kV and 60 amp of hydrogen ions, will be required to provide this net 5 MW of full energy hydrogen atoms. This paper describes the engineering design and manufacturing aspects of the prototype versions of these injectors, which are currently referred to as Plug-In Neutral Injectors (PINI). In particular the philosophy of accurate alignment of the tetrode accelerator structure on a high voltage insulated flange will be discussed in conjunction with the problem of active cooling of grids.

Additional information

Authors: DE VERE A P C, CULHAM LABORATORY, ABINGDON (UK);JET JOINT UNDERTAKING, ABINGDON (UK);CEA, FONTENAY-AUX-ROSES (FRANCE);SCHOLES R E, CULHAM LABORATORY, ABINGDON (UK);JET JOINT UNDERTAKING, ABINGDON (UK);CEA, FONTENAY-AUX-ROSES (FRANCE);ALTMANN H, CULHAM LABORATORY, ABINGDON (UK);JET JOINT UNDERTAKING, ABINGDON (UK);CEA, FONTENAY-AUX-ROSES (FRANCE);BOTTIGLIONI F CULHAM LABORATORY, ABINGDON (UK), CULHAM LABORATORY, ABINGDON (UK);JET JOINT UNDERTAKING, ABINGDON (UK);CEA, FONTENAY-AUX-ROSES (FRANCE);JET JOINT UNDERTAKING, ABINGDON (UK), CULHAM LABORATORY, ABINGDON (UK);JET JOINT UNDERTAKING, ABINGDON (UK);CEA, FONTENAY-AUX-ROSES (FRANCE);CEA, FONTENAY-AUX-ROSES (FRANCE), CULHAM LABORATORY, ABINGDON (UK);JET JOINT UNDERTAKING, ABINGDON (UK);CEA, FONTENAY-AUX-ROSES (FRANCE)
Bibliographic Reference: 9TH SYMPOSIUM ENGINEERING PROBLEMS OF FUSION RESEARCH, CHICAGO (USA), OCT. 26-29, 1982 PP. 1534-1537 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31320 ORA
Availability: Can be ordered online
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