Effect of Double Grid Cathode in IEC Device

IEC 장치에서 이중 그리드 음극의 영향

  • Ju, Heung-Jin (Department of Electrical and Biomedical Engineering, Hanyang University) ;
  • Kim, Bong-Seok (Department of Electrical and Biomedical Engineering, Hanyang University) ;
  • Hwang, Hui-Dong (Department of Electrical and Biomedical Engineering, Hanyang University) ;
  • Park, Jeong-Ho (Department of Electrical and Biomedical Engineering, Hanyang University) ;
  • Choi, Seung-Kil (Department of Electrical Engineering, Ansan College of Technology) ;
  • Ko, Kwang-Cheol (Department of Electrical and Biomedical Engineering, Hanyang University)
  • 주흥진 (한양대학교 전기.생체공학부) ;
  • 김봉석 (한양대학교 전기.생체공학부) ;
  • 황휘동 (한양대학교 전기.생체공학부) ;
  • 박정호 (한양대학교 전기.생체공학부) ;
  • 최승길 (안산공과대학 전기공학과) ;
  • 고광철 (한양대학교 전기.생체공학부)
  • Received : 2010.07.02
  • Accepted : 2010.08.23
  • Published : 2010.09.01


We have proposed a new configuration on the cathode structure to improve a neutron yield without the application of external ion sources in an inertial electrostatic confinement (IEC) device. A neutron yield in the IEC device is closely related to the potential well structure generated inside the cathode and is proportional to the ion current. Therefore, the application of a double grid cathode structure to the IEC device is expected to produce a higher ion current and neutron yield than at a single grid cathode due to a high electric field strength generated around the cathode. These possibilities were verified as compared with the ion current calculated from both shape of the single and double grid cathode. Additionally from the results of ion's lives and trajectories examined at various outer cathode voltages and grid cathode configurations by using particle simulations, the validity of the double grid cathode was confirmed.


Neutron yield;Inertial electrostatic confinement device;Double grid cathode;Ion current


  1. A. L. Wehmeyer, R. F. Radel, and G. L. Kulcinski, Fusion Sci. Tech. 47, 1260 (2005).
  2. T. Takamatsu, K. Masuda, T. Kyunai, and K. Yoshikawa, Nucl. Fusion 46, 142 (2006).
  3. P. T. Farnsworth, US Patent 3,258,402 (1966).
  4. R. L. Hirsch, Appl. Phys. 38, 4522 (1969).
  5. J. F. Santarius, 10th US-Japan Workshop on Inertial Electrostatic Confinement Fusion (Kyoto University, Kyoto, Japan, 2008) p. 107.
  6. R. Lohner, K. Morgan, J. peraire, and M. Vahdati, Int'l J. Num. Method in Fluids 7, 1093 (1987).
  7. H.-J. Ju, J.-H. Park, and K.-C. Ko, J. KIEEME 20, 471 (2007).
  8. N. Sato, J. Phys. D: Appl. Phys. 13, L3 (1980).
  9. G. H. Miley, Y. Gu, J. M. DeMora, R. A. Stubbers, T. A. Hochberg, J. H. Nadler, and R. A. Anderl, IEEE Trans. Plasma Sci. 25, 733 (1997).
  10. C. K. Birdsall and A. B. Langdon, Plasma Physics via Computer Simulation (McGraw-Hill, NY, 1985).
  11. A. L. Ward, J. Appl. Phys. 33, 2789 (1962).