TITLE

Negative ion source development for fusion application (invited)

AUTHOR(S)
Takeiri, Yasuhiko
PUB. DATE
February 2010
SOURCE
Review of Scientific Instruments;Feb2010, Vol. 81 Issue 2, p02B114
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Giant negative ion sources, producing high-current of several tens amps with high energy of several hundreds keV to 1 MeV, are required for a neutral beam injector (NBI) in a fusion device. The giant negative ion sources are cesium-seeded plasma sources, in which the negative ions are produced on the cesium-covered surface. Their characteristic features are discussed with the views of large-volume plasma production, large-area beam acceleration, and high-voltage dc holding. The international thermonuclear experimental reactor NBI employs a 1 MeV-40 A of deuterium negative ion source, and intensive development programs for the rf-driven source plasma production and the multistage electrostatic acceleration are in progress, including the long pulse operation for 3600 s. Present status of the development, as well as the achievements of the giant negative ion sources in the working injectors, is also summarized.
ACCESSION #
48352482

 

Related Articles

  • Design of a versatile multiaperture negative ion source. Cavenago, M.; Kulevoy, T.; Petrenko, S.; Antoni, V.; Bigi, M.; Gazza, E.; Recchia, M.; Serianni, G.; Veltri, P. // Review of Scientific Instruments;Feb2010, Vol. 81 Issue 2, p02A713 

    Negative ion sources are a key component of the neutral beam injector to be installed in the International Thermonuclear Experimental Reactor. At present research and development activities address several important issues related to beam extraction, optics, and optimization. Together with the...

  • Influence of ionization cross sections on the gas mixing effect for the production of Ar9+ ions in a CAPRICE ECR source. Delaunay, M. // Review of Scientific Instruments;Apr92, Vol. 63 Issue 4, p2861 

    The gas mixing effect in the electron cyclotron resonance (ECR) multicharged ion sources is analyzed while taking into account the ionization cross sections of different support gases such as H[sub 2], He, Ne, N[sub 2], and O[sub 2]. The Ar[sup 9+] ion currents delivered by a CAPRICE ECR ion...

  • The 10-GHz NEOMAFIOS upgraded electron cyclotron resonance ion source. Ludwig, P.; Geller, R.; Melin, G. // Review of Scientific Instruments;Apr92, Vol. 63 Issue 4, p2892 

    After the successful development of the first NEOMAFIOS source, an ECRIS for highly charged ions at 8 GHz with a magnetic configuration obtained only with FeNdB permanent magnets, the building of an upgraded NEOMAFIOS at 10 GHz has been achieved. This source started operating a few months ago...

  • A study of the parallel energy distribution of lost electrons from the central plasma of an electron cyclotron resonance ion source. Golovanivsky, K. S.; Melin, G. // Review of Scientific Instruments;Apr92, Vol. 63 Issue 4, p2886 

    The electron loss current from the central plasma of a 10 GHz Caprice ion source is analyzed by using a multigrid electrostatic analyzer. It is found that the plasma potential near the axis is negative in the range -10 to -30 V when the rf power varies from 100 to 450 W. It is also shown that...

  • A superconducting electron cyclotron resonance source for the L.N.S. Ciavola, G.; Gammino, S. // Review of Scientific Instruments;Apr92, Vol. 63 Issue 4, p2881 

    At the "Laboratorio Nazionale del Sud" (L.N.S.) the K-800 Superconducting Cyclotron (C.S.) is under construction and by the end of 1992 it will be completed in order to work as a booster for the 15-MV Tandem. With this facility fully stripped light ions will reach 100 MeV/amu, while the heaviest...

  • Process of optimization of the ECR CAPRICE sources (abstract). Delaunay, M.; Jacquot, B.; Pontonnier, M. // Review of Scientific Instruments;Apr92, Vol. 63 Issue 4, p2860 

    Axial exploration of the plasma in a multicharged electron cyclotron resonance (ECR) CAPRICE ion source was performed with a Langmuir probe and a thermocouple. Hot electron density profile is hollow at the center and the peaks of density are found near the electron cyclotron resonance zones....

  • Plasma sputter negative ion source with ECR discharge (invited). Takagi, A.; Ikegami, K.; Mori, Y. // Review of Scientific Instruments;Apr92, Vol. 63 Issue 4, p2669 

    A plasma sputter type of negative ion source with an electron cyclotron resonance (ECR) discharge has been developed at KEK. The ECR discharge was produced by a 2.45- GHz microwave. In this ion source, negative heavy ions are produced at the surface of the metal which is placed in a Xe plasma...

  • A low power 2.45 GHz ECR ion source for multiply charged ions. Liehr, M.; Trassl, R.; Schlapp, M.; Salzborn, E. // Review of Scientific Instruments;Apr92, Vol. 63 Issue 4, p2541 

    An electron-cyclotron-resonance ion source (ECRIS) designed for use on a high voltage terminal that has limited power availability and space has been built. To reduce the power consumption of the ion source, the necessary magnetic fields were produced entirely by permanent magnets. Eighteen...

  • Development of a compact 2.45 GHz ECR ion source. Fiedler, S.; Winter, H. P. // Review of Scientific Instruments;Apr92, Vol. 63 Issue 4, p2532 

    ECR-heated plasmas as produced by microwave discharges in magnetic fields are now routinely utilized for production of intense singly and multiply charged ion beams. Such ECR ion sources ("ECRIS") can be operated during extended lifetimes even with reactive working gases. Our requirement for a...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics