TITLE

Semi-analytical Modeling of the NIO1 Source

AUTHOR(S)
Cazzador, M.; Cavenago, M.; Serianni, G.; Veltri, P.
PUB. DATE
March 2015
SOURCE
AIP Conference Proceedings;2015, Vol. 1655 Issue 1, p1
SOURCE TYPE
Conference Proceeding
DOC. TYPE
Article
ABSTRACT
NIO1 is a compact and versatile negative ion source, with a total current of 130 mA accelerated to 60 keV. Negative ions are created inside the plasma, which is inductively coupled to an external rf cylindrical coil operating in the range of 2 ± 0.2 MHz. The plasma is confined in the source chamber (a 50 mm radius cylinder) by a multipole magnetic field and the ions are extracted through a 3×3 matrix of apertures. The use of cesium, to enhance the negative ion production by H0 bombardment of the surfaces, is foreseen in a second stage of the operation, so that at present time the source is operating in pure volume configuration. This paper presents a model aimed to describe the main physical phenomena occurring in the source, focusing on the rf coupling with the plasma and the evolution of plasma parameters in the source. With respect to more sophisticated models of negative ion sources here we aimed to develop a fast tool capable of qualitatively describing the response of the system to variations in the basic operating parameters. The findings of this models is finally compared with the first experimental results of NIO1.
ACCESSION #
102165137

 

Related Articles

  • Beam deflection by plasma grid filter current in the negative-ion source for JT-60U neutral beam injection system. Umeda, N.; Ikeda, Y.; Hanada, M.; Inoue, T.; Kawai, M.; Kazawa, M.; Komata, M.; Mogaki, K.; Ohga, T. // Review of Scientific Instruments;Mar2006, Vol. 77 Issue 3, p03A529 

    In the JT-60U negative-ion-based neutral beam injection system, the effect of negative ion and electron deflection by the plasma grid (PG) magnetic filter was studied. After a long-pulse operation of up to 19 s, a local melting was observed on the beamline near the ion source, facing the...

  • A neutral lithium beam source. Zhang, XiaoDong; Wang, ZhengMin; Hu, LiQun // Review of Scientific Instruments;Apr94, Vol. 65 Issue 4, p1231 

    A low energy neutral lithium beam source with energy about 6 kev and a neutral beam equivalent current of 20 µA/cm² has been developed in ASIPP in order to measure the density gradient and the fluctuations in the edge plasma of the HT-6M tokamak. In the source, lithium ions are extracted...

  • Preliminary results of a broad beam radio frequency ion source with electron plasma interaction. Abdelaziz, M.E.; Zakhary, S.G.; Ghanem, A.A.; Abdelghaffar, A.M. // Review of Scientific Instruments;Mar96, Vol. 67 Issue 3, p1365 

    Discusses prelimary results of a broad beam radio frequency (rf) ion source with electron plasma interaction. Schematic diagram of the rf broad beam ion source; Profile of the ion beams at 1kV extraction voltage with and without perveance matching; Influence of the magnetic field on extraction...

  • Metal negative ion production by an RF sputter self-extraction ion source. Yamada, N.; Kasuya, T.; Kenmotsu, T.; Vasquez Jr., M. R.; Wada, M. // AIP Conference Proceedings;Feb2013, Vol. 1515 Issue 1, p491 

    An 80 mm diameter 80 mm long RF sputter type self-extraction negative ion source equipped with a metal sputter target has been tested to investigate the performance of producing beams of negative aluminum (Al) ions. An RF power at 13.56 MHz is directly supplied to a 60 mm diameter target...

  • Ion source with LaB6 hollow cathode for a diagnostic neutral beam injector. Deichuli, P. P.; Abdrashitov, G. F.; Ivanov, A. A.; Kolmogorov, V. V.; Mishagin, V. V.; Shul'zhenko, G. I.; Stupishin, N. V.; Beals, D.; Granetz, R. // Review of Scientific Instruments;Mar2006, Vol. 77 Issue 3, p03B514 

    In this article ion source capable of providing 8 A, 54 keV proton beam in maximum 3 s pulses is described. A general description of the diagnostic injector based on this ion source is also given. The ion beam is extracted and accelerated by a four-electrode multiaperture ion-optical system. In...

  • Performance characteristics of a capacitively coupled 3 cm rf ion sourcea). Korzec, D.; Engemann, J.; Rapp, J. // Review of Scientific Instruments;May92, Vol. 63 Issue 5, p3068 

    A novel 13.56 MHz radio frequency capacitively coupled ion source has been developed and characterized with special emphasis on low-energy ( < 1 keV) broad ion beam extraction. When operating the source with chamber pressures ranging from 1 × 10[sup -4] to 1.7 × 10[sup -3] mbar (O[sub 2]...

  • Radio frequency driven multicusp sources (invited). Leung, Ka-Ngo // Review of Scientific Instruments;Feb1998, Vol. 69 Issue 2, p998 

    Describes the radio frequency driven multicusp sources. Impact of cesium on the negative hydrogen beam current; Application of the multicusp sources to radioactive ion beam production and compact neutron tubes; Generation of plasma through a copper coil antenna.

  • Development of large radio frequency driven negative ion sources for fusion. Vollmer, O.; Falter, H.; Frank, P.; Heinemann, B.; Kraus, W.; Massmann, P.; McNeely, P.; Riedl, R.; Speth, E.; Trainham, R.; Wilhelm, R. // Review of Scientific Instruments;Feb2000, Vol. 71 Issue 2, p939 

    Focuses on development of a large area, high power radiofrequency ion source for negative ion beam systems. Design of the type VI plasma source with external radiofrequency coil; Experiments without cesium seeding; Experiments with cesium seeding.

  • Radio frequency linear ion beam source with 6 cmx66 cm beam. Siegfried, D.; Buchholtz, B.; Burtner, D.; Foster, W. // Review of Scientific Instruments;Feb2000, Vol. 71 Issue 2, p1029 

    Focuses on development of an inductively coupled radio frequency linear ion beam source with a rectangular cross-section beam. Extraction of ions from the discharge chamber; Operating characteristics of the ion beam source; Performance results.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics