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A spiral self-magnetically insulated ion diode

  • A.I. Pushkarev (a1) and YU. I. Isakova (a1)


The paper presets the results of a study on a self-magnetically insulated ion diode with an explosive-emission potential electrode. The experiments have been carried out using the TEMP-4M accelerator, operating in a double-pulse mode: the first negative pulse (300–500 ns, 100–150 kV) followed by the second positive pulse (150 ns, 250–300 kV). The ion beam energy density was 0.3–2.5 J/cm2; the beam was composed from carbon ions (80–85%) and protons. We studied several geometries of the diode: planar and focusing strip arrangement, annular and spiral geometries. It was shown that during the second voltage pulse, a condition of magnetic insulation in the diode gap is fulfilled (B/Bcr ≥3). Using the new spiral geometry of the diode, it was possible to increase the efficiency of ion current generation due to the suppression of the electron component of the total diode current by increasing the electron transit time in the gap. We have increased the efficiency of carbon ion generation from 5–9% (in the planar strip diodes) up to 17–20% in the spiral diode. The spiral geometry of the diode makes it possible to increase the efficiency of C+ ion generation 25–30 times compared to the space-charge-limited current (Childe-Langmuir limit). This is more than two times higher than in other known geometries of self-magnetically insulated diodes. The spiral diode has a resource of more than 107 pulses.


Corresponding author

Address correspondence and reprint requests to: A.I. Pushkarev, Tomsk Polytechnic University Tomsk, 2A Lenin Ave., Russian Federation. E-mail:


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Langmuir, I. (1913). The effect of space charge and residual gases on thermionic currents in high vacuum. Phys. Rev. 2, 450486.
Sudan, R. & Lovelace, R. (1973). Generation of intense ion beams in pulsed diodes. Phys. Rev. Lett. 31, 11741177.
Dreike, P., Eichenberger, C., Humphries, S. & Sudan, R. (1976). Production of intense proton fluxes in a magnetically insulated diode. J. Appl. Phys. 47, 8588.
Furman, É., Stepanov, A. & Furman, N. (2007). Ionic diode. Techn. Phys. 52, 621.
Humphries, S. (1977). Self magnetic insulation of pulsed ion diodes. Plasma Phys. 19, 399406.
Humphries, S. (1990). Charged Particle Beams. New York: Wiley.
Vandevender, J., Quintenz, J., Leeper, R., Johnson, D. & Crow, J. (1981). Crow self-magnetically insulated ion diode. J. Appl. Phys. 52, 412.
Bystritskii, V., Glushko, Yu., Kharlov, A. & Sinebryukhov, A. (1991). Experiments on high power ion beam generation in self-insulated diodes. Laser Part. Beams 9, 691698.
Yoshikawa, T., Masugata, K., Ito, M., Matsui, M. & Yatsui, K. (1984). Planar-type self-magnetically insulated diode as a new source of intense pulsed light-ion beam. J. Appl. Phys. 56, 31373140.
Remnev, G. & Shulov, V. (1993). Application of high-power ion beams for technology. Laser Part. Beams 11, 707731.
Bystritski, V. & Didenko, A. (1984). Intense Ion Beams. Moscow: Energoatomizdat.
Pushkarev, A. & Isakova, Yu. (2012). Techn. Phys. 82, 24.
Pushkarev, A., Isakova, Yu. & Vakhrushev, D. (2010). The effect of ion current density amplification in a diode with passive anode in self-magnetic insulation mode. Phys. Plasmas 17, 123112.
Pushkarev, A., Tarbokov, V., Sazonov, R. & Isakov, I. (2009). Russian Patent RU 86374 U1.
Pushkarev, A., Isakova, Y. & Guselnikov, V. (2011). Limitation of the electron emission in an ion diode with self-magnetic insulation. Phys. Plasmas 18. 083109.
Pushkarev, A., Isakova, J., Saltimakov, M. & Sazonov, R. (2010). Investigation of magnetically self-insulated effect in an ion diode with an explosive emission potential electrode. Phys. Plasmas 17, 013104.
Davis, H., Bartsch, R., Olson, J., Rej, D. & Waganaar, W. (1997). Intense ion beam optimization and characterization with infrared imaging. J. Appl. Phys. 82, 32233231.
Antonsen, T. & Ott, E. (1976). Theory of intense ion beam acceleration. Phys. Fluids 19, 5259.


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A spiral self-magnetically insulated ion diode

  • A.I. Pushkarev (a1) and YU. I. Isakova (a1)


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