Whistler wave excitation and effects of self-focusing on ion beam propagation through a background plasma along a solenoidal magnetic field

Dorf, Mikhail A.; Kaganovich, Igor D.; Startsev, Edward A.; Davidson, Ronald C.
February 2010
Physics of Plasmas;Feb2010, Vol. 17 Issue 2, p023103
Academic Journal
This paper extends studies of ion beam transport through a background plasma along a solenoidal magnetic field by Kaganovich et al. [Phys. Plasmas 15, 103108 (2008)] to the important regime of moderate magnetic field strength satisfying ωce>2βbωpe. Here, ωce and ωpe are the electron cyclotron frequency and electron plasma frequency, respectively, and βb=vb/c is the directed ion beam velocity normalized to the speed of light. The electromagnetic field perturbations excited by the ion beam pulse in this regime are calculated analytically and verified by comparison with the numerical simulations. The degrees of beam charge neutralization and current neutralization are estimated, and the transverse component of the Lorentz force associated with the excited electromagnetic field is calculated. It is found that the plasma response to the ion beam pulse is significantly different depending on whether the value of the solenoidal magnetic field is below or above the threshold value specified by ωcecr=2βbωpe, and corresponding to the resonant excitation of large-amplitude whistler waves. The use of intense whistler wave excitations for diagnostic purposes is also discussed.


Related Articles

  • Study of the extracted beam and the radial magnetic field of electron cyclotron resonance ion source at HIMAC. Kitagawa, A.; Muramatsu, M.; Sasaki, M.; Yamada, S.; Biri, S.; Jincho, K.; Okada, T.; Sakuma, T.; Takasugi, W.; Yamamoto, M. // Review of Scientific Instruments;Feb2002, Vol. 73 Issue 2, p604 

    Experimental results on an 18 GHz electron cyclotron resonance (ECR) ion source (NIRS-HEC) and a 10 GHz ECR ion source (NIRS-ECR) at National Institute of Radiological Sciences (NIRS) show that an extracted beam intensity strongly depends on the radial magnetic field distribution generated by a...

  • Summary of the performances of the superconducting electron cyclotron resonance ion source at 14 GHz Ludwig, P.; Bourg, F.; Briand, P.; Girard, A.; Melin, G.; Guillaume, D.; Seyfert, P.; La Grassa, A.; Ciavola, G.; Gammino, S.; Castro, M.; Chines, F.; Marietta, S.; Marletta, S. // Review of Scientific Instruments;Dec1998, Vol. 69 Issue 12, p4082 

    Examines the performance of the superconducting electron cyclotron resonance ion source (SERSE) at 14 gigahertz. Importance of the high magnetic fields of the SERSE; Performance level in the delivery of highly charged ion beams in argon and oxygen gases.

  • ECCD requirements for the NTM suppression. Bertelli, N.; De Lazzari, D.; Westerhof, E. // AIP Conference Proceedings;12/23/2011, Vol. 1406 Issue 1, p509 

    No abstract available.

  • Plasma instability in the afterglow of electron cyclotron resonance discharge sustained in a mirror trap. Izotov, I.; Mansfeld, D.; Skalyga, V.; Zorin, V.; Grahn, T.; Kalvas, T.; Koivisto, H.; Komppula, J.; Peura, P.; Tarvainen, O.; Toivanen, V. // Physics of Plasmas;Dec2012, Vol. 19 Issue 12, p122501 

    The work presented in this article is devoted to time-resolved diagnostics of non-linear effects observed during the afterglow plasma decay of a 14 GHz electron cyclotron resonance ion source operated in pulsed mode. Plasma instabilities that cause perturbations of the extracted ion current...

  • 11–13 GHz electron cyclotron resonance plasma source using cylindrically comb-shaped magnetic-field configuration for broad ion-beam processing. Asaji, Toyohisa; Kato, Yushi; Sato, Fuminobu; Iida, Toshiyuki; Saito, Junji // Review of Scientific Instruments;Nov2006, Vol. 77 Issue 11, p113503 

    An electron cyclotron resonance (ECR) plasma source for broad ion-beam processing has been upgraded by a cylindrically comb-shaped magnetic-field configuration and 11–13 GHz frequency microwaves. A pair of comb-shaped magnets surrounds a large-bore discharge chamber. The magnetic field...

  • Extraction studies on electron cyclotron resonance ion sources. Leroy, R.; Mandin, J.; Bertrand, P.; Lecesne, N.; Pacquet, J.Y.; Robert, E.; Sortais, P.; Villari, A.C.C. // Review of Scientific Instruments;Mar96, Vol. 67 Issue 3, p1350 

    Compares the results of an ion beam extraction experiment using electron cyclotron resonance ion sources and numerical simulation. Influence of the axial magnetic field on multicharged ion beam if the space charge during the acceleration is not compensated; Effect of the decrease of the plasma...

  • Ion Beam Extraction from Large Bore 11 to 13 GHz ECR Ion Source with a Pair of Cylindrically Comb-Shaped Magnetic Fields. Watanabe, T.; Satani, T.; Matsui, Y.; Sato, F.; Kato, Y.; Iida, T. // AIP Conference Proceedings;11/3/2008, Vol. 1066 Issue 1, p533 

    We have developed a large bore electron cyclotron resonance (ECR) ion source with cylindrically comb-shaped magnetic field configuration to realize high current density and comparatively large bore ion beam which can be used for beam processes under low pressure and low microwave power. It is...

  • Development of Electron Cyclotron Resonance Ion Source for Synthesis of Endohedral Metallofullerenes. Tanaka, K.; Muramatsu, M.; Uchida, T.; Biri, S.; Asaji, T.; Shima, K.; Hanajiri, T.; Kitagawa, A.; Kato, Y.; Yoshida, Y. // AIP Conference Proceedings;11/3/2008, Vol. 1066 Issue 1, p525 

    A new electron cyclotron resonance ion source (ECRIS) has been constructed for synthesis of endohedral metallofullerenes. The main purpose of the ion source is to produce new biological and medical materials. The design is based on ECRIS for production of multicharged ion beams with a...

  • The influence of axial magnetic fields on the extraction of an ion beam from a plasma source. Spädtke, Peter; Wituschek, Herbert // Review of Scientific Instruments;Jan1990, Vol. 61 Issue 1, p547 

    ECR (electron cyclotron resonance) sources are now commonly in use for the production of highly charged ions. For the operation of this type of source a solenoidal magnetic field is necessary. In the present work the influence of this axial field on the extracted ion beam is investigated. The...


Read the Article


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

Try another library?
Sign out of this library

Other Topics