skip to main content

SciTech ConnectSciTech Connect

Title: Ways to improve the efficiency and reliability of radio frequency driven negative ion sources for fusion

Large RF driven negative hydrogen ion sources are being developed at IPP Garching for the future neutral beam injection system of ITER. The overall power efficiency of these sources is low, because for the RF power supply self-excited generators are utilized and the plasma is generated in small cylindrical sources (“drivers”) and expands into the source main volume. At IPP experiments to reduce the primary power and the RF power required for the plasma production are performed in two ways: The oscillator generator of the prototype source has been replaced by a transistorized RF transmitter and two alternative driver concepts, a spiral coil, in which the field is concentrated by ferrites, which omits the losses by plasma expansion and a helicon source are being tested.
Authors:
 [1] ; ;  [1] ;  [2] ; ;  [3]
  1. Max-Planck-Institut für Plasmaphysik (IPP), Boltzmannstr. 2, 85748 Garching (Germany)
  2. (Germany)
  3. AG Experimentelle Plasmaphysik, Universität Augsburg, 86135 Augsburg (Germany)
Publication Date:
OSTI Identifier:
22254038
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 2; Conference: ICIS 2011: 14. international conference on ion sources, Giardini-Naxos, Sicily (Italy), 12-16 Sep 2011; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANIONS; BEAM INJECTION; CYLINDRICAL CONFIGURATION; FERRITE; FERRITES; HYDROGEN IONS; IPP GARCHING; ITER TOKAMAK; PLASMA EXPANSION; PLASMA PRODUCTION; RADIOWAVE RADIATION; RELIABILITY